Exemplo n.º 1
0
//*****************************************************************************
//
// Configure the USB controller and power the bus.
//
// This function configures the USB controller for host operation.
// It is assumed that the main system clock has been configured at this point.
//
// \return None.
//
//*****************************************************************************
void
ConfigureUSBInterface(void)
{
    //
    // Enable the uDMA controller and set up the control table base.
    // This is required by usblib.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_UDMA);
    SysCtlDelay(80);
    uDMAEnable();
    uDMAControlBaseSet(g_sDMAControlTable);

    //
    // Enable the USB controller.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_USB0);

    //
    // Set the USB pins to be controlled by the USB controller.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOL);
    ROM_GPIOPinConfigure(GPIO_PD6_USB0EPEN);
    ROM_GPIOPinTypeUSBDigital(GPIO_PORTD_BASE, GPIO_PIN_6);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTL_BASE, GPIO_PIN_6 | GPIO_PIN_7);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);

    //
    // Register the host class driver
    //
    USBHCDRegisterDrivers(0, g_ppHostClassDrivers, NUM_CLASS_DRIVERS);

    //
    // Open an instance of the mass storage class driver.
    //
    g_psMSCInstance = USBHMSCDriveOpen(0, MSCCallback);

    //
    // Initialize the power configuration. This sets the power enable signal
    // to be active high and does not enable the power fault.
    //
    USBHCDPowerConfigInit(0, USBHCD_VBUS_AUTO_HIGH | USBHCD_VBUS_FILTER);

    //
    // Force the USB mode to host with no callback on mode changes since
    // there should not be any.
    //
    USBStackModeSet(0, eUSBModeForceHost, 0);

    //
    // Wait 10ms for the pin to go low.
    //
    SysCtlDelay(g_ui32SysClock/100);

    //
    // Initialize the host controller.
    //
    USBHCDInit(0, g_pHCDPool, HCD_MEMORY_SIZE);
}
void initUSB(void)
{
	// Configure the required pins for USB operation
	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
	ROM_GPIOPinTypeUSBAnalog(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);
	ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_4 | GPIO_PIN_5);

	// Initialize the USB stack for device mode.
	USBStackModeSet(0, eUSBModeForceDevice, 0);

	// Init the usb driver
	pvDevice = USBDHIDInit(0, &g_sHIDSwarmColtrolDevice);

	g_USBRxState = USB_RX_IDLE;
	g_USBTxState = USB_TX_IDLE;
}
// Initialise the USB peripheral
void USBInit(void)
{
	g_ui32Flags = 0;
	g_bUSBConfigured = false;

	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
	ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_5 | GPIO_PIN_4);

	// Initialize the transmit and receive buffers.
	USBBufferInit(&TxBuffer);
	USBBufferInit(&RxBuffer);

	// Set the USB stack mode to Device mode with VBUS monitoring.
	USBStackModeSet(0, eUSBModeForceDevice, 0);

	// Pass our device information to the USB library and place the device on the bus.
	USBDCDCInit(0, &g_sCDCDevice);
}
Exemplo n.º 4
0
void USB_Task(void)
{

    //
    // Configure the required pins for USB operation.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_5 | GPIO_PIN_4);

    //
    // Not configured initially.
    //
    g_bUSBConfigured = false;

    //
    // Initialize the transmit and receive buffers.
    //
    USBBufferInit(&g_sTxBuffer);
    USBBufferInit(&g_sRxBuffer);

    //
    // Set the USB stack mode to Device mode with VBUS monitoring.
    //
    USBStackModeSet(0, eUSBModeForceDevice, 0);

    //
    // Pass our device information to the USB library and place the device
    // on the bus.
    //
    USBDCDCInit(0, &g_sCDCDevice);
    Virtual_Comm_Init();

	(void)usb_terminal_add_cmd((command_t*)&usb_ver_cmd);
	(void)usb_terminal_add_cmd((command_t*)&usb_top_cmd);
	(void)usb_terminal_add_cmd((command_t*)&usb_rst_cmd);
	(void)usb_terminal_add_cmd((command_t*)&echo_cmd);

	while(1)
	{
		/* Call the application task */
		usb_terminal_process();
	}
}
Exemplo n.º 5
0
void msc_init()
{
	//
	// Configure and enable uDMA
	//

    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_5 | GPIO_PIN_4);

	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UDMA);
	SysCtlDelay(10);
	ROM_uDMAControlBaseSet(&sDMAControlTable[0]);
	ROM_uDMAEnable();

	//
	// Initialize the idle timeout and reset all flags.
	//
	g_ulIdleTimeout = 0;
	g_ulFlags = 0;
	g_eMSCState = MSC_DEV_DISCONNECTED;

	//
	// Set the USB stack mode to Device mode with VBUS monitoring.
	//
	USBStackModeSet(0, USB_MODE_DEVICE, 0);

	//
	// Pass our device information to the USB library and place the device
	// on the bus.
	//
	USBDMSCInit(0, (tUSBDMSCDevice *)&g_sMSCDevice);

	//
	// Determine whether or not an SDCard is installed.  If not, print a
	// warning and have the user install one and restart.
	//
	disk_initialize(0);


}
Exemplo n.º 6
0
//*****************************************************************************
//
// This is the main loop that runs the application.
//
//*****************************************************************************
int
main(void)
{
    tRectangle sRect;
    uint_fast32_t ui32Retcode;

    //
    // Set the system clock to run at 50MHz from the PLL.
    //
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

    //
    // Configure SysTick for a 100Hz interrupt.  The FatFs driver wants a 10 ms
    // tick.
    //
    ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / 100);
    ROM_SysTickEnable();
    ROM_SysTickIntEnable();

    //
    // Configure and enable uDMA
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UDMA);
    SysCtlDelay(10);
    ROM_uDMAControlBaseSet(&sDMAControlTable[0]);
    ROM_uDMAEnable();

    //
    // Initialize the display driver.
    //
    CFAL96x64x16Init();

    //
    // Initialize the graphics context.
    //
    GrContextInit(&g_sContext, &g_sCFAL96x64x16);

    //
    // Fill the top 15 rows of the screen with blue to create the banner.
    //
    sRect.i16XMin = 0;
    sRect.i16YMin = 0;
    sRect.i16XMax = GrContextDpyWidthGet(&g_sContext) - 1;
    sRect.i16YMax = DISPLAY_BANNER_HEIGHT - 1;
    GrContextForegroundSet(&g_sContext, ClrDarkBlue);
    GrRectFill(&g_sContext, &sRect);

    //
    // Put a white box around the banner.
    //
    GrContextForegroundSet(&g_sContext, ClrWhite);
    GrRectDraw(&g_sContext, &sRect);

    //
    // Put the application name in the middle of the banner.
    //
    GrContextFontSet(&g_sContext, g_psFontFixed6x8);
    GrStringDrawCentered(&g_sContext, "usb-dev-msc", -1,
                         GrContextDpyWidthGet(&g_sContext) / 2, 5, 0);

    //
    // Initialize the idle timeout and reset all flags.
    //
    g_ui32IdleTimeout = 0;
    g_ui32Flags = 0;

    //
    // Initialize the state to idle.
    //
    g_eMSCState = MSC_DEV_DISCONNECTED;

    //
    // Draw the status bar and set it to idle.
    //
    UpdateStatus("Disconnected", 1);

    //
    // Enable the USB controller.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_USB0);

    //
    // Set the USB pins to be controlled by the USB controller.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
    ROM_GPIOPinConfigure(GPIO_PG4_USB0EPEN);
    ROM_GPIOPinTypeUSBDigital(GPIO_PORTG_BASE, GPIO_PIN_4);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOL);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTL_BASE, GPIO_PIN_6 | GPIO_PIN_7);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);

    //
    // Set the USB stack mode to Device mode with VBUS monitoring.
    //
    USBStackModeSet(0, eUSBModeDevice, 0);

    //
    // Pass our device information to the USB library and place the device
    // on the bus.
    //
    USBDMSCInit(0, &g_sMSCDevice);

    //
    // Determine whether or not an SDCard is installed.  If not, print a
    // warning and have the user install one and restart.
    //
    ui32Retcode = disk_initialize(0);

    GrContextFontSet(&g_sContext, g_psFontFixed6x8);
    if(ui32Retcode != RES_OK) {
        GrStringDrawCentered(&g_sContext, "No SDCard Found", -1,
                             GrContextDpyWidthGet(&g_sContext) / 2, 16, 0);
        GrStringDrawCentered(&g_sContext, "Please insert",
                             -1, GrContextDpyWidthGet(&g_sContext) / 2, 26, 0);
        GrStringDrawCentered(&g_sContext, "a card and",
                             -1, GrContextDpyWidthGet(&g_sContext) / 2, 36, 0);
        GrStringDrawCentered(&g_sContext, "reset the board.",
                             -1, GrContextDpyWidthGet(&g_sContext) / 2, 46, 0);
    } else {
        GrStringDrawCentered(&g_sContext, "SDCard Found",  -1,
                             GrContextDpyWidthGet(&g_sContext) / 2, 30, 0);
    }

    //
    // Drop into the main loop.
    //
    while(1) {
        switch(g_eMSCState) {
            case MSC_DEV_READ: {
                //
                // Update the screen if necessary.
                //
                if(g_ui32Flags & FLAG_UPDATE_STATUS) {
                    UpdateStatus("Reading", 0);
                    g_ui32Flags &= ~FLAG_UPDATE_STATUS;
                }

                //
                // If there is no activity then return to the idle state.
                //
                if(g_ui32IdleTimeout == 0) {
                    UpdateStatus("Idle", 0);
                    g_eMSCState = MSC_DEV_IDLE;
                }

                break;
            }
            case MSC_DEV_WRITE: {
                //
                // Update the screen if necessary.
                //
                if(g_ui32Flags & FLAG_UPDATE_STATUS) {
                    UpdateStatus("Writing", 0);
                    g_ui32Flags &= ~FLAG_UPDATE_STATUS;
                }

                //
                // If there is no activity then return to the idle state.
                //
                if(g_ui32IdleTimeout == 0) {
                    UpdateStatus("Idle", 0);
                    g_eMSCState = MSC_DEV_IDLE;
                }
                break;
            }
            case MSC_DEV_DISCONNECTED: {
                //
                // Update the screen if necessary.
                //
                if(g_ui32Flags & FLAG_UPDATE_STATUS) {
                    UpdateStatus("Disconnected", 0);
                    g_ui32Flags &= ~FLAG_UPDATE_STATUS;
                }
                break;
            }
            case MSC_DEV_IDLE: {
                break;
            }
            default: {
                break;
            }
        }
    }
}
Exemplo n.º 7
0
//*****************************************************************************
//
// This is the main application entry function.
//
//*****************************************************************************
int
main(void)
{
    volatile uint32_t ui32Loop;
    uint32_t ui32TxCount;
    uint32_t ui32RxCount;

    //
    // Enable lazy stacking for interrupt handlers.  This allows floating-point
    // instructions to be used within interrupt handlers, but at the expense of
    // extra stack usage.
    //
    ROM_FPULazyStackingEnable();

    //
    // Set the clocking to run from the PLL at 50MHz
    //
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

    //
    // Enable the GPIO port that is used for the on-board LED.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);

    //
    // Enable the GPIO pins for the LED (PF2 & PF3).
    //
    ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_3 | GPIO_PIN_2);

    //
    // Open UART0 and show the application name on the UART.
    //
    ConfigureUART();

    UARTprintf("\033[2JTiva C Series USB bulk device example\n");
    UARTprintf("---------------------------------\n\n");

    //
    // Not configured initially.
    //
    g_bUSBConfigured = false;

    //
    // Enable the GPIO peripheral used for USB, and configure the USB
    // pins.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_4 | GPIO_PIN_5);

    //
    // Enable the system tick.
    //
    ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / SYSTICKS_PER_SECOND);
    ROM_SysTickIntEnable();
    ROM_SysTickEnable();

    //
    // Tell the user what we are up to.
    //
    UARTprintf("Configuring USB\n");

    //
    // Initialize the transmit and receive buffers.
    //
    USBBufferInit(&g_sTxBuffer);
    USBBufferInit(&g_sRxBuffer);

    //
    // Set the USB stack mode to Device mode with VBUS monitoring.
    //
    USBStackModeSet(0, eUSBModeForceDevice, 0);

    //
    // Pass our device information to the USB library and place the device
    // on the bus.
    //
    USBDBulkInit(0, &g_sBulkDevice);

    //
    // Wait for initial configuration to complete.
    //
    UARTprintf("Waiting for host...\n");

    //
    // Clear our local byte counters.
    //
    ui32RxCount = 0;
    ui32TxCount = 0;

    //
    // Main application loop.
    //
    while(1)
    {
        //
        // See if any data has been transferred.
        //
        if((ui32TxCount != g_ui32TxCount) || (ui32RxCount != g_ui32RxCount))
        {
            //
            // Has there been any transmit traffic since we last checked?
            //
            if(ui32TxCount != g_ui32TxCount)
            {
                //
                // Turn on the Green LED.
                //
                GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_3, GPIO_PIN_3);

                //
                // Delay for a bit.
                //
                for(ui32Loop = 0; ui32Loop < 150000; ui32Loop++)
                {
                }

                //
                // Turn off the Green LED.
                //
                GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_3, 0);

                //
                // Take a snapshot of the latest transmit count.
                //
                ui32TxCount = g_ui32TxCount;
            }

            //
            // Has there been any receive traffic since we last checked?
            //
            if(ui32RxCount != g_ui32RxCount)
            {
                //
                // Turn on the Blue LED.
                //
                GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, GPIO_PIN_2);

                //
                // Delay for a bit.
                //
                for(ui32Loop = 0; ui32Loop < 150000; ui32Loop++)
                {
                }

                //
                // Turn off the Blue LED.
                //
                GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, 0);

                //
                // Take a snapshot of the latest receive count.
                //
                ui32RxCount = g_ui32RxCount;
            }

            //
            // Update the display of bytes transferred.
            //
            UARTprintf("\rTx: %d  Rx: %d", ui32TxCount, ui32RxCount);
        }
    }
}
Exemplo n.º 8
0
int main(void) {
	int i;
	uint8_t data[64];

    // Enable lazy stacking for interrupt handlers.  This allows floating-point
    // instructions to be used within interrupt handlers, but at the expense of
    // extra stack usage.
    ROM_FPULazyStackingEnable();

    // Set the clocking to run from the PLL at 50MHz.
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

    // Enable the GPIO peripheral used for USB, and configure the USB
    // pins.
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);

    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_4 | GPIO_PIN_5);

    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
	ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_1 + GPIO_PIN_2 + GPIO_PIN_3);
	ROM_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1 + GPIO_PIN_2 + GPIO_PIN_3, 0);

    // Init diagnostic
    diagnostic_clear_eventhistory();

    // Init UART
    ConfigureUART();

    // Print welcome message
    UARTprintf("Configuring USB\n");

    //------------------------------------------------------
//    // Set the USB stack mode to Device mode with VBUS monitoring.
//    USBStackModeSet(0, eUSBModeForceDevice, 0);
//
//    // Pass our device information to the USB library and place the device
//    // on the bus.
//    USBDHIDInit(0, &hiddatapipe_device);

    //------------------------------------------------------

    USBStackModeSet(0, eUSBModeForceDevice, 0);
    USBDHIDCompositeInit(0, &hiddatapipe_device, &(composite_device.psDevices[0]));
	USBDDFUCompositeInit(0, &dfu_device, &(composite_device.psDevices[1]));

	//
	// Pass the USB library our device information, initialize the USB
	// controller and connect the device to the bus.
	//
	USBDCompositeInit(0, &composite_device, DESCRIPTOR_BUFFER_SIZE, composite_descriptorbuffer);

    // Block until connected
    while (!usbstate.connected)
    	;

    // Configure SysTick
	ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / 1000); // 1 ms
	ROM_SysTickEnable();
	ROM_SysTickIntEnable();

	// enable first IN report by clearing USB tx complete
	usbstate.txcomplete = 1;

    while(1) {

    	// uncomment this if event history log is needed
//        if (events.print_history == true)
//        	diagnostic_print_eventhistory();

        // usbstate.txcomplete flag was set to 1 by txhandler after usbdhidreportwrite had succeeded
        if (usbstate.txcomplete  && usbstate.txdataupdated) {
        	// clear usbstate.txcomplete flag to indicate that usbdhidreportwrite is busy
        	usbstate.txcomplete = 0;
        	usbstate.txdataupdated = 0;
        	// put data (1 byte in this case) into the usb pipeline and the host will poll&read it
        	// the polling rate is defined in the interrupt IN endpoint descriptor

        	data[0] = txdata.buffer[0]; // temp buffer to avoid update change of txdata.buffer between the next 2 calls
        	USBDHIDReportWrite(&hiddatapipe_device, data, 1, 0);
        	UARTprintf("Sending irq IN to host: %d\n", data[0]);

        }

        if (usbstate.hostsentreport) {
        	// clear hostsentreport flag
        	usbstate.hostsentreport = 0;

        	for (i = 0; i < HID_REPORTOUT_SIZE; i++) {
        		UARTprintf("Received OUT report from host: %02x\n", rxdata.buffer[i]);
        		rxdata.buffer[i] = 0;
        	}

        }

    }
}
Exemplo n.º 9
0
//*****************************************************************************
//
// This is the main application entry function.
//
//*****************************************************************************
int
main(void)
{
    uint32_t ui32TxCount;
    uint32_t ui32RxCount;
    tRectangle sRect;
    char pcBuffer[16];
    uint32_t ui32Fullness;

    //
    // Enable lazy stacking for interrupt handlers.  This allows floating-point
    // instructions to be used within interrupt handlers, but at the expense of
    // extra stack usage.
    //
    ROM_FPULazyStackingEnable();

    //
    // Set the clocking to run from the PLL at 50MHz
    //
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

    //
    // Configure the required pins for USB operation.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
    ROM_GPIOPinConfigure(GPIO_PG4_USB0EPEN);
    ROM_GPIOPinTypeUSBDigital(GPIO_PORTG_BASE, GPIO_PIN_4);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOL);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTL_BASE, GPIO_PIN_6 | GPIO_PIN_7);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);

    //
    // Erratum workaround for silicon revision A1.  VBUS must have pull-down.
    //
    if(CLASS_IS_BLIZZARD && REVISION_IS_A1)
    {
        HWREG(GPIO_PORTB_BASE + GPIO_O_PDR) |= GPIO_PIN_1;
    }

    //
    // Not configured initially.
    //
    g_bUSBConfigured = false;

    //
    // Initialize the display driver.
    //
    CFAL96x64x16Init();

    //
    // Initialize the graphics context.
    //
    GrContextInit(&g_sContext, &g_sCFAL96x64x16);

    //
    // Fill the top 15 rows of the screen with blue to create the banner.
    //
    sRect.i16XMin = 0;
    sRect.i16YMin = 0;
    sRect.i16XMax = GrContextDpyWidthGet(&g_sContext) - 1;
    sRect.i16YMax = 9;
    GrContextForegroundSet(&g_sContext, ClrDarkBlue);
    GrRectFill(&g_sContext, &sRect);

    //
    // Put a white box around the banner.
    //
    GrContextForegroundSet(&g_sContext, ClrWhite);
    GrRectDraw(&g_sContext, &sRect);

    //
    // Put the application name in the middle of the banner.
    //
    GrContextFontSet(&g_sContext, g_psFontFixed6x8);
    GrStringDrawCentered(&g_sContext, "usb-dev-serial", -1,
                         GrContextDpyWidthGet(&g_sContext) / 2, 4, 0);

    //
    // Show the various static text elements on the color STN display.
    //
    GrStringDraw(&g_sContext, "Tx #",-1, 0, 12, false);
    GrStringDraw(&g_sContext, "Tx buf", -1, 0, 22, false);
    GrStringDraw(&g_sContext, "Rx #", -1, 0, 32, false);
    GrStringDraw(&g_sContext, "Rx buf", -1, 0, 42, false);
    DrawBufferMeter(&g_sContext, 40, 22);
    DrawBufferMeter(&g_sContext, 40, 42);

    //
    // Enable the UART that we will be redirecting.
    //
    ROM_SysCtlPeripheralEnable(USB_UART_PERIPH);

    //
    // Enable and configure the UART RX and TX pins
    //
    ROM_SysCtlPeripheralEnable(TX_GPIO_PERIPH);
    ROM_SysCtlPeripheralEnable(RX_GPIO_PERIPH);
    ROM_GPIOPinTypeUART(TX_GPIO_BASE, TX_GPIO_PIN);
    ROM_GPIOPinTypeUART(RX_GPIO_BASE, RX_GPIO_PIN);

    //
    // TODO: Add code to configure handshake GPIOs if required.
    //

    //
    // Set the default UART configuration.
    //
    ROM_UARTConfigSetExpClk(USB_UART_BASE, ROM_SysCtlClockGet(),
                            DEFAULT_BIT_RATE, DEFAULT_UART_CONFIG);
    ROM_UARTFIFOLevelSet(USB_UART_BASE, UART_FIFO_TX4_8, UART_FIFO_RX4_8);

    //
    // Configure and enable UART interrupts.
    //
    ROM_UARTIntClear(USB_UART_BASE, ROM_UARTIntStatus(USB_UART_BASE, false));
    ROM_UARTIntEnable(USB_UART_BASE, (UART_INT_OE | UART_INT_BE | UART_INT_PE |
                      UART_INT_FE | UART_INT_RT | UART_INT_TX | UART_INT_RX));

    //
    // Enable the system tick.
    //
    ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / SYSTICKS_PER_SECOND);
    ROM_SysTickIntEnable();
    ROM_SysTickEnable();

    //
    // Tell the user what we are up to.
    //
    DisplayStatus(&g_sContext, " Configuring... ");

    //
    // Initialize the transmit and receive buffers.
    //
    USBBufferInit(&g_sTxBuffer);
    USBBufferInit(&g_sRxBuffer);

    //
    // Set the USB stack mode to Device mode with VBUS monitoring.
    //
    USBStackModeSet(0, eUSBModeDevice, 0);

    //
    // Pass our device information to the USB library and place the device
    // on the bus.
    //
    USBDCDCInit(0, &g_sCDCDevice);

    //
    // Wait for initial configuration to complete.
    //
    DisplayStatus(&g_sContext, "Waiting for host");

    //
    // Clear our local byte counters.
    //
    ui32RxCount = 0;
    ui32TxCount = 0;

    //
    // Enable interrupts now that the application is ready to start.
    //
    ROM_IntEnable(USB_UART_INT);

    //
    // Main application loop.
    //
    while(1)
    {

        //
        // Have we been asked to update the status display?
        //
        if(g_ui32Flags & COMMAND_STATUS_UPDATE)
        {
            //
            // Clear the command flag
            //
            ROM_IntMasterDisable();
            g_ui32Flags &= ~COMMAND_STATUS_UPDATE;
            ROM_IntMasterEnable();

            DisplayStatus(&g_sContext, g_pcStatus);
        }

        //
        // Has there been any transmit traffic since we last checked?
        //
        if(ui32TxCount != g_ui32UARTTxCount)
        {
            //
            // Take a snapshot of the latest transmit count.
            //
            ui32TxCount = g_ui32UARTTxCount;

            //
            // Update the display of bytes transmitted by the UART.
            //
            usnprintf(pcBuffer, 16, "%d ", ui32TxCount);
            GrStringDraw(&g_sContext, pcBuffer, -1, 40, 12, true);

            //
            // Update the RX buffer fullness. Remember that the buffers are
            // named relative to the USB whereas the status display is from
            // the UART's perspective. The USB's receive buffer is the UART's
            // transmit buffer.
            //
            ui32Fullness = ((USBBufferDataAvailable(&g_sRxBuffer) * 100) /
                          UART_BUFFER_SIZE);

            UpdateBufferMeter(&g_sContext, ui32Fullness, 40, 22);
        }

        //
        // Has there been any receive traffic since we last checked?
        //
        if(ui32RxCount != g_ui32UARTRxCount)
        {
            //
            // Take a snapshot of the latest receive count.
            //
            ui32RxCount = g_ui32UARTRxCount;

            //
            // Update the display of bytes received by the UART.
            //
            usnprintf(pcBuffer, 16, "%d ", ui32RxCount);
            GrStringDraw(&g_sContext, pcBuffer, -1, 40, 32, true);

            //
            // Update the TX buffer fullness. Remember that the buffers are
            // named relative to the USB whereas the status display is from
            // the UART's perspective. The USB's transmit buffer is the UART's
            // receive buffer.
            //
            ui32Fullness = ((USBBufferDataAvailable(&g_sTxBuffer) * 100) /
                          UART_BUFFER_SIZE);

            UpdateBufferMeter(&g_sContext, ui32Fullness, 40, 42);
        }
    }
}
//*****************************************************************************
//
// This is the main loop that runs the application.
//
//*****************************************************************************
int
main(void)
{
    tRectangle sRect;
    tUSBMode eLastMode;
    char *pcString;

    //
    // Enable lazy stacking for interrupt handlers.  This allows floating-point
    // instructions to be used within interrupt handlers, but at the expense of
    // extra stack usage.
    //
    ROM_FPULazyStackingEnable();

    //
    // Set the system clock to run at 50MHz from the PLL.
    //
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

    //
    // Initially wait for device connection.
    //
    g_eUSBState = STATE_NO_DEVICE;
    eLastMode = USB_MODE_OTG;
    g_eCurrentUSBMode = USB_MODE_OTG;

    //
    // Enable Clocking to the USB controller.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_USB0);
    
    //
    // Configure the required pins for USB operation.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
    ROM_GPIOPinConfigure(GPIO_PG4_USB0EPEN);
    ROM_GPIOPinTypeUSBDigital(GPIO_PORTG_BASE, GPIO_PIN_4);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOL);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTL_BASE, GPIO_PIN_6 | GPIO_PIN_7);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);

    //
    // Configure SysTick for a 100Hz interrupt.
    //
    ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / TICKS_PER_SECOND);
    ROM_SysTickEnable();
    ROM_SysTickIntEnable();

    //
    // Enable Interrupts
    //
    ROM_IntMasterEnable();

    //
    // Enable clocking to the UART and associated GPIO
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);

    //
    // Configure the relevant pins such that UART0 owns them.
    //
    ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);

    //
    // Open UART0 for debug output.
    //
    UARTStdioInit(0);

    //
    // Initialize the USB stack mode and pass in a mode callback.
    //
    USBStackModeSet(0, USB_MODE_OTG, ModeCallback);

    //
    // Register the host class drivers.
    //
    USBHCDRegisterDrivers(0, g_ppHostClassDrivers, g_ulNumHostClassDrivers);

    //
    // Open an instance of the keyboard driver.  The keyboard does not need
    // to be present at this time, this just save a place for it and allows
    // the applications to be notified when a keyboard is present.
    //
    g_ulKeyboardInstance = USBHKeyboardOpen(KeyboardCallback, g_pucBuffer,
                                            KEYBOARD_MEMORY_SIZE);

    //
    // Initialize the power configuration. This sets the power enable signal
    // to be active high and does not enable the power fault.
    //
    USBHCDPowerConfigInit(0, USBHCD_VBUS_AUTO_HIGH | USBHCD_VBUS_FILTER);

    //
    // Initialize the USB controller for OTG operation with a 2ms polling
    // rate.
    //
    USBOTGModeInit(0, 2000, g_pHCDPool, HCD_MEMORY_SIZE);

    //
    // Initialize the display driver.
    //
    CFAL96x64x16Init();

    //
    // Initialize the graphics context.
    //
    GrContextInit(&g_sContext, &g_sCFAL96x64x16);

    //
    // Fill the top part of the screen with blue to create the banner.
    //
    sRect.sXMin = 0;
    sRect.sYMin = 0;
    sRect.sXMax = GrContextDpyWidthGet(&g_sContext) - 1;
    sRect.sYMax = (2 * DISPLAY_BANNER_HEIGHT) - 1;
    GrContextForegroundSet(&g_sContext, DISPLAY_BANNER_BG);
    GrRectFill(&g_sContext, &sRect);

    //
    // Change foreground for white text.
    //
    GrContextForegroundSet(&g_sContext, DISPLAY_TEXT_FG);

    //
    // Put the application name in the middle of the banner.
    //
    GrContextFontSet(&g_sContext, g_pFontFixed6x8);
    GrStringDrawCentered(&g_sContext, "usb-host-", -1,
                         GrContextDpyWidthGet(&g_sContext) / 2, 4, 0);
    GrStringDrawCentered(&g_sContext, "keyboard", -1,
                             GrContextDpyWidthGet(&g_sContext) / 2, 14, 0);


    //
    // Calculate the number of characters that will fit on a line.
    // Make sure to leave a small border for the text box.
    //
    g_ulCharsPerLine = (GrContextDpyWidthGet(&g_sContext) - 4) /
                        GrFontMaxWidthGet(g_pFontFixed6x8);

    //
    // Calculate the number of lines per usable text screen.  This requires
    // taking off space for the top and bottom banners and adding a small bit
    // for a border.
    //
    g_ulLinesPerScreen = (GrContextDpyHeightGet(&g_sContext) -
                          (3*(DISPLAY_BANNER_HEIGHT + 1)))/
                          GrFontHeightGet(g_pFontFixed6x8);

    //
    // Open and instance of the keyboard class driver.
    //
    UARTprintf("Host Keyboard Application\n");

    //
    // Initial update of the screen.
    //
    UpdateStatus();

    //
    // The main loop for the application.
    //
    while(1)
    {
        //
        // Tell the OTG library code how much time has passed in
        // milliseconds since the last call.
        //
        USBOTGMain(GetTickms());

        //
        // Has the USB mode changed since last time we checked?
        //
        if(g_eCurrentUSBMode != eLastMode)
        {
            //
            // Remember the new mode.
            //
            eLastMode = g_eCurrentUSBMode;

            switch(eLastMode)
            {
                case USB_MODE_HOST:
                    pcString = "HOST";
                    break;

                case USB_MODE_DEVICE:
                    pcString = "DEVICE";
                    break;

                case USB_MODE_NONE:
                    pcString = "NONE";
                    break;

                default:
                    pcString = "UNKNOWN";
                    break;
            }

            UARTprintf("USB mode changed to %s\n", pcString);
        }

        switch(g_eUSBState)
        {
            //
            // This state is entered when they keyboard is first detected.
            //
            case STATE_KEYBOARD_INIT:
            {
                //
                // Initialized the newly connected keyboard.
                //
                USBHKeyboardInit(g_ulKeyboardInstance);

                //
                // Proceed to the keyboard connected state.
                //
                g_eUSBState = STATE_KEYBOARD_CONNECTED;

                //
                // Update the screen now that the keyboard has been
                // initialized.
                //
                UpdateStatus();

                USBHKeyboardModifierSet(g_ulKeyboardInstance, g_ulModifiers);

                break;
            }
            case STATE_KEYBOARD_UPDATE:
            {
                //
                // If the application detected a change that required an
                // update to be sent to the keyboard to change the modifier
                // state then call it and return to the connected state.
                //
                g_eUSBState = STATE_KEYBOARD_CONNECTED;

                USBHKeyboardModifierSet(g_ulKeyboardInstance, g_ulModifiers);

                break;
            }
            case STATE_KEYBOARD_CONNECTED:
            {
                //
                // Nothing is currently done in the main loop when the keyboard
                // is connected.
                //
                break;
            }

            case STATE_UNKNOWN_DEVICE:
            {
                //
                // Nothing to do as the device is unknown.
                //
                break;
            }

            case STATE_NO_DEVICE:
            {
                //
                // Nothing is currently done in the main loop when the keyboard
                // is not connected.
                //
                break;
            }
            default:
            {
                break;
            }
        }
    }
}
//*****************************************************************************
//
// This is the main loop that runs the application.
//
//*****************************************************************************
int
main(void)
{
    tRectangle sRect;

    //
    // Set the clocking to run from the PLL at 50MHz.
    //
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

    //
    // Initialize the display driver.
    //
    CFAL96x64x16Init();

    //
    // Initialize the graphics context.
    //
    GrContextInit(&g_sContext, &g_sCFAL96x64x16);

    //
    // Fill the top part of the screen with blue to create the banner.
    //
    sRect.i16XMin = 0;
    sRect.i16YMin = 0;
    sRect.i16XMax = GrContextDpyWidthGet(&g_sContext) - 1;
    sRect.i16YMax = (DISPLAY_BANNER_HEIGHT) - 1;
    GrContextForegroundSet(&g_sContext, DISPLAY_BANNER_BG);
    GrRectFill(&g_sContext, &sRect);

    //
    // Change foreground for white text.
    //
    GrContextForegroundSet(&g_sContext, DISPLAY_TEXT_FG);

    //
    // Put the application name in the middle of the banner.
    //
    GrContextFontSet(&g_sContext, g_psFontFixed6x8);
    GrStringDrawCentered(&g_sContext, "usb-host-mouse", -1,
                         GrContextDpyWidthGet(&g_sContext) / 2, 4, 0);

    //
    // Display default information about the mouse
    //
    GrStringDrawCentered(&g_sContext, "Position:", -1,
                             GrContextDpyWidthGet(&g_sContext) / 2, 16, 0);
    GrStringDrawCentered(&g_sContext, "-,-", -1,
                             GrContextDpyWidthGet(&g_sContext) / 2, 26, 1);
    GrStringDrawCentered(&g_sContext, "Buttons:", -1,
                             GrContextDpyWidthGet(&g_sContext) / 2, 36, 0);
    GrStringDrawCentered(&g_sContext, "---", -1,
                             GrContextDpyWidthGet(&g_sContext) / 2, 46, 1);

    //
    // Fill the bottom rows of the screen with blue to create the status area.
    //
    sRect.i16XMin = 0;
    sRect.i16YMin = GrContextDpyHeightGet(&g_sContext) -
                  DISPLAY_BANNER_HEIGHT - 1;
    sRect.i16XMax = GrContextDpyWidthGet(&g_sContext) - 1;
    sRect.i16YMax = sRect.i16YMin + DISPLAY_BANNER_HEIGHT;

    GrContextForegroundSet(&g_sContext, DISPLAY_BANNER_BG);
    GrRectFill(&g_sContext, &sRect);

    //
    // Put a white box around the banner.
    //
    GrContextForegroundSet(&g_sContext, ClrWhite);
    GrRectDraw(&g_sContext, &sRect);

    //
    // Print a no device message a placeholder for the message printed
    // during an event.
    //
    GrStringDrawCentered(&g_sContext, "No Device", -1,
                         GrContextDpyWidthGet(&g_sContext) / 2,
                         sRect.i16YMin + 5, 0);

    //
    // Configure SysTick for a 100Hz interrupt.
    //
    ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / TICKS_PER_SECOND);
    ROM_SysTickEnable();
    ROM_SysTickIntEnable();

    //
    // Enable Clocking to the USB controller.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_USB0);

    //
    // Configure the required pins for USB operation.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
    ROM_GPIOPinConfigure(GPIO_PG4_USB0EPEN);
    ROM_GPIOPinTypeUSBDigital(GPIO_PORTG_BASE, GPIO_PIN_4);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOL);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTL_BASE, GPIO_PIN_6 | GPIO_PIN_7);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);

    //
    // Initially wait for device connection.
    //
    g_eUSBState = STATE_NO_DEVICE;

    //
    // Initialize the USB stack mode and pass in a mode callback.
    //
    USBStackModeSet(0, eUSBModeOTG, ModeCallback);

    //
    // Register the host class drivers.
    //
    USBHCDRegisterDrivers(0, g_ppHostClassDrivers, g_ui32NumHostClassDrivers);

    //
    // Initialized the cursor.
    //
    g_ui32Buttons = 0;
    g_i32CursorX = 0;
    g_i32CursorY = 0;

    //
    // Open an instance of the mouse driver.  The mouse does not need
    // to be present at this time, this just saves a place for it and allows
    // the applications to be notified when a mouse is present.
    //
    g_psMouseInstance =
        USBHMouseOpen(MouseCallback, g_pui8Buffer, MOUSE_MEMORY_SIZE);

    //
    // Initialize the power configuration. This sets the power enable signal
    // to be active high and does not enable the power fault.
    //
    USBHCDPowerConfigInit(0, USBHCD_VBUS_AUTO_HIGH | USBHCD_VBUS_FILTER);

    //
    // Initialize the USB controller for OTG operation with a 2ms polling
    // rate.
    //
    USBOTGModeInit(0, 2000, g_pui8HCDPool, HCD_MEMORY_SIZE);

    //
    // The main loop for the application.
    //
    while(1)
    {
        //
        // Tell the OTG state machine how much time has passed in
        // milliseconds since the last call.
        //
        USBOTGMain(GetTickms());

        switch(g_eUSBState)
        {
            //
            // This state is entered when the mouse is first detected.
            //
            case STATE_MOUSE_INIT:
            {
                //
                // Initialize the newly connected mouse.
                //
                USBHMouseInit(g_psMouseInstance);

                //
                // Proceed to the mouse connected state.
                //
                g_eUSBState = STATE_MOUSE_CONNECTED;

                break;
            }

            case STATE_MOUSE_CONNECTED:
            {
                //
                // Nothing is currently done in the main loop when the mouse
                // is connected.
                //
                break;
            }

            case STATE_NO_DEVICE:
            {
                //
                // The mouse is not connected so nothing needs to be done here.
                //
                break;
            }

            default:
            {
                break;
            }
        }
    }
}
Exemplo n.º 12
0
/* Main function
 *
 * - Initialise device and any global variables
 * - Enable Interrupts
 * - Start endless loop
 */
void main(void) {

	unsigned long ulRetcode;

	// Initialise the device clock to 80MHz
	ROM_SysCtlClockSet(SYSCTL_SYSDIV_2_5 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ | SYSCTL_OSC_MAIN );

	// Enable SysTick for FatFS at 10ms intervals
	ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / 100);
	ROM_SysTickEnable();
	ROM_SysTickIntEnable();

    //
    // Configure and enable uDMA
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UDMA);
    SysCtlDelay(10);
    ROM_uDMAControlBaseSet(&sDMAControlTable[0]);
    ROM_uDMAEnable();

    //
	// Enable the USB controller.
	//
	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_USB0);

	//
	// Set the USB pins to be controlled by the USB controller.

	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);

	ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_4 | GPIO_PIN_5);

	// Initialize the idle timeout and reset all flags.
	//
	g_ulIdleTimeout = 0;
	g_ulFlags = 0;

	//
	// Initialize the state to idle.
	//
	g_eMSCState = MSC_DEV_DISCONNECTED;

	//
	// Set the USB stack mode to Device mode with VBUS monitoring.
	//
	USBStackModeSet(0, USB_MODE_DEVICE, 0);

	//
	// Pass our device information to the USB library and place the device
	// on the bus.
	//
	USBDMSCInit(0, (tUSBDMSCDevice *)&g_sMSCDevice);

	//
	// Determine whether or not an SDCard is installed.  If not, print a
	// warning and have the user install one and restart.
	//
	ulRetcode = disk_initialize(0);

	// Enable Global interrupts
	ROM_IntMasterEnable();

	// Enable floating point arithmetic unit, but disable stacking
	ROM_FPUEnable();
	ROM_FPUStackingDisable();

	// Initialise GPIO - All ports enabled
	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);
	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);

	// Unlock NMI pins for GPIO usage (PD7 + PF0)
	HWREG(GPIO_PORTD_BASE + 0x520) = 0x4C4F434B;
	HWREG(GPIO_PORTF_BASE + 0x520) = 0x4C4F434B;
	HWREG(GPIO_PORTD_BASE + 0x524) = 0x000000FF;
	HWREG(GPIO_PORTF_BASE + 0x524) = 0x000000FF;
	HWREG(GPIO_PORTD_BASE + 0x520) = 0x00000000;
	HWREG(GPIO_PORTF_BASE + 0x520) = 0x00000000;

	// Initialise GPIO Expander (probably not happening)

	// Initialise Buttons
	btn_init();

	// Initialise FX
	fx_init();

	// Initialise ADC
	adc_init();

	// Initialise DAC
	dac_init();

	// Initialise SD Card and Mass storage
	sdcard_init();

	// Initialise UART for debugging
	uart_init();

	// Initialise Timers
	timers_init();




	for(;;) {
		// Endless Loop
		ADCProcessorTrigger(ADC0_BASE, 0);
		SysCtlDelay(SysCtlClockGet() / 120); // 25ms
	}
}
//*****************************************************************************
//
// This is the main application entry function.
//
//*****************************************************************************
int
main(void)
{
    unsigned long ulTxCount;
    unsigned long ulRxCount;
	unsigned long ulLoop;

    //
    // Enable lazy stacking for interrupt handlers.  This allows floating-point
    // instructions to be used within interrupt handlers, but at the expense of
    // extra stack usage.
    //
    ROM_FPULazyStackingEnable();

    //
    // Set the clocking to run from the PLL at 50MHz
    //
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

    //
    // Configure the required pins for USB operation.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_5 | GPIO_PIN_4);

	//
    // Enable the GPIO port that is used for the on-board LED.
	//
	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);

	//
	// Enable the GPIO pins for the LED (PF2 & PF3).  
	//
	ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_3|GPIO_PIN_2);

    //
    // Not configured initially.
    //
    g_bUSBConfigured = false;

    //
    // Enable the UART that we will be redirecting.
    //
    ROM_SysCtlPeripheralEnable(USB_UART_PERIPH);

    //
    // Enable and configure the UART RX and TX pins
    //
    ROM_SysCtlPeripheralEnable(TX_GPIO_PERIPH);
    ROM_SysCtlPeripheralEnable(RX_GPIO_PERIPH);
    ROM_GPIOPinTypeUART(TX_GPIO_BASE, TX_GPIO_PIN);
    ROM_GPIOPinTypeUART(RX_GPIO_BASE, RX_GPIO_PIN);

    //
    // TODO: Add code to configure handshake GPIOs if required.
    //

    //
    // Set the default UART configuration.
    //
    ROM_UARTConfigSetExpClk(USB_UART_BASE, ROM_SysCtlClockGet(),
                            DEFAULT_BIT_RATE, DEFAULT_UART_CONFIG);
    ROM_UARTFIFOLevelSet(USB_UART_BASE, UART_FIFO_TX4_8, UART_FIFO_RX4_8);

    //
    // Configure and enable UART interrupts.
    //
    ROM_UARTIntClear(USB_UART_BASE, ROM_UARTIntStatus(USB_UART_BASE, false));
    ROM_UARTIntEnable(USB_UART_BASE, (UART_INT_OE | UART_INT_BE | UART_INT_PE |
                      UART_INT_FE | UART_INT_RT | UART_INT_TX | UART_INT_RX));

    //
    // Enable the system tick.
    //
    ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / SYSTICKS_PER_SECOND);
    ROM_SysTickIntEnable();
    ROM_SysTickEnable();

    //
    // Initialize the transmit and receive buffers.
    //
    USBBufferInit((tUSBBuffer *)&g_sTxBuffer);
    USBBufferInit((tUSBBuffer *)&g_sRxBuffer);

    //
    // Set the USB stack mode to Device mode with VBUS monitoring.
    //
    USBStackModeSet(0, USB_MODE_DEVICE, 0);

    //
    // Pass our device information to the USB library and place the device
    // on the bus.
    //
    USBDCDCInit(0, (tUSBDCDCDevice *)&g_sCDCDevice);

    //
    // Clear our local byte counters.
    //
    ulRxCount = 0;
    ulTxCount = 0;

    //
    // Enable interrupts now that the application is ready to start.
    //
    ROM_IntEnable(USB_UART_INT);

    //
    // Main application loop.
    //
    while(1)
    {
        //
        // Have we been asked to update the status display?
        //
        if(g_ulFlags & COMMAND_STATUS_UPDATE)
        {
            //
            // Clear the command flag
            //
            ROM_IntMasterDisable();
            g_ulFlags &= ~COMMAND_STATUS_UPDATE;
            ROM_IntMasterEnable();
        }

        //
        // Has there been any transmit traffic since we last checked?
        //
        if(ulTxCount != g_ulUARTTxCount)
        {
	        //
		    // Turn on the Green LED.
		    //
			GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_3, GPIO_PIN_3);

		    //
		    // Delay for a bit.
		    //
		    for(ulLoop = 0; ulLoop < 150000; ulLoop++)
		    {
		    }
		
		    //
		    // Turn off the Green LED.
		    //
			GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_3, 0);
			
            //
            // Take a snapshot of the latest transmit count.
            //
            ulTxCount = g_ulUARTTxCount;
		}

        //
        // Has there been any receive traffic since we last checked?
        //
        if(ulRxCount != g_ulUARTRxCount)
        {
		    //
		    // Turn on the Blue LED.
		    //
			GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, GPIO_PIN_2);

		    //
		    // Delay for a bit.
		    //
		    for(ulLoop = 0; ulLoop < 150000; ulLoop++)
		    {
		    }
		
		    //
		    // Turn off the Blue LED.
		    //
			GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, 0);

		    //
            // Take a snapshot of the latest receive count.
            //
            ulRxCount = g_ulUARTRxCount;

        }
    }
}
Exemplo n.º 14
0
//*****************************************************************************
//
// This is the main loop that runs the application.
//
//*****************************************************************************
int
main(void)
{
    uint_fast32_t ui32LastTickCount;
    bool bLastSuspend;
    tRectangle sRect;
    tContext sContext;
    int_fast32_t i32CenterX;

    //
    // Enable lazy stacking for interrupt handlers.  This allows floating-point
    // instructions to be used within interrupt handlers, but at the expense of
    // extra stack usage.
    //
    ROM_FPULazyStackingEnable();

    //
    // Set the clocking to run from the PLL at 50MHz.
    //
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

    //
    // Configure the required pins for USB operation.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
    ROM_GPIOPinConfigure(GPIO_PG4_USB0EPEN);
    ROM_GPIOPinTypeUSBDigital(GPIO_PORTG_BASE, GPIO_PIN_4);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOL);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTL_BASE, GPIO_PIN_6 | GPIO_PIN_7);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);

    //
    // Erratum workaround for silicon revision A1.  VBUS must have pull-down.
    //
    if(CLASS_IS_BLIZZARD && REVISION_IS_A1)
    {
        HWREG(GPIO_PORTB_BASE + GPIO_O_PDR) |= GPIO_PIN_1;
    }

    //
    // Enable the GPIO that is used for the on-board LED.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
    ROM_GPIOPinTypeGPIOOutput(GPIO_PORTG_BASE, GPIO_PIN_2);
    ROM_GPIOPinWrite(GPIO_PORTG_BASE, GPIO_PIN_2, 0);

    //
    // Initialize the buttons driver
    //
    ButtonsInit();

    //
    // Initialize the display driver.
    //
    CFAL96x64x16Init();

    //
    // Initialize the graphics context and find the middle X coordinate.
    //
    GrContextInit(&sContext, &g_sCFAL96x64x16);
    i32CenterX = GrContextDpyWidthGet(&sContext) / 2;

    //
    // Fill the top part of the screen with blue to create the banner.
    //
    sRect.i16XMin = 0;
    sRect.i16YMin = 0;
    sRect.i16XMax = GrContextDpyWidthGet(&sContext) - 1;
    sRect.i16YMax = 9;
    GrContextForegroundSet(&sContext, ClrDarkBlue);
    GrRectFill(&sContext, &sRect);

    //
    // Change foreground for white text.
    //
    GrContextForegroundSet(&sContext, ClrWhite);

    //
    // Put the application name in the middle of the banner.
    //
    GrContextFontSet(&sContext, g_psFontFixed6x8);
    GrStringDrawCentered(&sContext, "usb-dev-keyboard", -1, i32CenterX, 4, 0);

    //
    // Not configured initially.
    //
    g_bConnected = false;
    g_bSuspended = false;
    bLastSuspend = false;

    //
    // Initialize the USB stack for device mode.
    //
    USBStackModeSet(0, eUSBModeDevice, 0);

    //
    // Pass our device information to the USB HID device class driver,
    // initialize the USB
    // controller and connect the device to the bus.
    //
    USBDHIDKeyboardInit(0, &g_sKeyboardDevice);

    //
    // Set the system tick to fire 100 times per second.
    //
    ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / SYSTICKS_PER_SECOND);
    ROM_SysTickIntEnable();
    ROM_SysTickEnable();

    //
    // The main loop starts here.  We begin by waiting for a host connection
    // then drop into the main keyboard handling section.  If the host
    // disconnects, we return to the top and wait for a new connection.
    //
    while(1)
    {
        uint8_t ui8Buttons;
        uint8_t ui8ButtonsChanged;

        //
        // Tell the user what we are doing and provide some basic instructions.
        //
        GrStringDrawCentered(&sContext, "    Waiting    ",
                             -1, i32CenterX, 22, 1);
        GrStringDrawCentered(&sContext, " for host ... ", -1,
                             i32CenterX, 32, 1);

        //
        // Wait here until USB device is connected to a host.
        //
        while(!g_bConnected)
        {
        }

        //
        // Update the status.
        //
        GrStringDrawCentered(&sContext, "     Host     ",
                             -1, i32CenterX, 22, 1);
        GrStringDrawCentered(&sContext, " connected ... ",
                             -1, i32CenterX, 32, 1);

        //
        // Enter the idle state.
        //
        g_eKeyboardState = STATE_IDLE;

        //
        // Assume that the bus is not currently suspended if we have just been
        // configured.
        //
        bLastSuspend = false;

        //
        // Keep transferring characters from the UART to the USB host for as
        // long as we are connected to the host.
        //
        while(g_bConnected)
        {
            //
            // Remember the current time.
            //
            ui32LastTickCount = g_ui32SysTickCount;

            //
            // Has the suspend state changed since last time we checked?
            //
            if(bLastSuspend != g_bSuspended)
            {
                //
                // Yes - the state changed so update the display.
                //
                bLastSuspend = g_bSuspended;
                if(bLastSuspend)
                {
                    GrStringDrawCentered(&sContext, "      Bus      ", -1,
                                         i32CenterX, 22, 1);
                    GrStringDrawCentered(&sContext, " suspended ... ", -1,
                                         i32CenterX, 32, 1);
                }
                else
                {
                    GrStringDrawCentered(&sContext, "     Host     ", -1,
                                         i32CenterX, 22, 1);
                    GrStringDrawCentered(&sContext, " connected ... ",
                                         -1, i32CenterX, 32, 1);
                }
            }

            //
            // See if the button was just pressed.
            //
            ui8Buttons = ButtonsPoll(&ui8ButtonsChanged, 0);
            if(BUTTON_PRESSED(SELECT_BUTTON, ui8Buttons, ui8ButtonsChanged))
            {
                //
                // If the bus is suspended then resume it.  Otherwise, type
                // some "random" characters.
                //
                if(g_bSuspended)
                {
                    USBDHIDKeyboardRemoteWakeupRequest(
                                                   (void *)&g_sKeyboardDevice);
                }
                else
                {
                    SendString("Make the Switch to TI Microcontrollers!");
                }
            }

            //
            // Wait for at least 1 system tick to have gone by before we poll
            // the buttons again.
            //
            while(g_ui32SysTickCount == ui32LastTickCount)
            {
            }
        }
    }
}
Exemplo n.º 15
0
//*****************************************************************************
//
// This is the main loop that runs the application.
//
//*****************************************************************************
int
main(void)
{
    //
    // Turn on stacking of FPU registers if FPU is used in the ISR.
    //
    FPULazyStackingEnable();

    //
    // Set the clocking to run from the PLL at 40MHz.
    //
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_5 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

    //
    // Set the system tick to fire 100 times per second.
    //
    ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / SYSTICKS_PER_SECOND);
    ROM_SysTickIntEnable();
    ROM_SysTickEnable();

    //
    // Enable the Debug UART.
    //
    ConfigureUART();

    //
    // Print the welcome message to the terminal.
    //
    UARTprintf("\033[2JAir Mouse Application\n");

    //
    // Configure desired interrupt priorities. This makes certain that the DCM
    // is fed data at a consistent rate. Lower numbers equal higher priority.
    //
    ROM_IntPrioritySet(INT_I2C3, 0x00);
    ROM_IntPrioritySet(INT_GPIOB, 0x10);
    ROM_IntPrioritySet(FAULT_SYSTICK, 0x20);
    ROM_IntPrioritySet(INT_UART1, 0x60);
    ROM_IntPrioritySet(INT_UART0, 0x70);
    ROM_IntPrioritySet(INT_WTIMER5B, 0x80);

    //
    // Configure the USB D+ and D- pins.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_5 | GPIO_PIN_4);

    //
    // Pass the USB library our device information, initialize the USB
    // controller and connect the device to the bus.
    //
    USBDHIDMouseCompositeInit(0, &g_sMouseDevice, &g_psCompDevices[0]);
    USBDHIDKeyboardCompositeInit(0, &g_sKeyboardDevice, &g_psCompDevices[1]);

    //
    // Set the USB stack mode to Force Device mode.
    //
    USBStackModeSet(0, eUSBModeForceDevice, 0);

    //
    // Pass the device information to the USB library and place the device
    // on the bus.
    //
    USBDCompositeInit(0, &g_sCompDevice, DESCRIPTOR_DATA_SIZE,
                      g_pui8DescriptorData);

    //
    // User Interface Init
    //
    ButtonsInit();
    RGBInit(0);
    RGBEnable();

    //
    // Initialize the motion sub system.
    //
    MotionInit();

    //
    // Initialize the Radio Systems.
    //
    LPRFInit();

    //
    // Drop into the main loop.
    //
    while(1)
    {

        //
        // Check for and handle timer tick events.
        //
        if(HWREGBITW(&g_ui32Events, USB_TICK_EVENT) == 1)
        {
            //
            // Clear the Tick event flag. Set in SysTick interrupt handler.
            //
            HWREGBITW(&g_ui32Events, USB_TICK_EVENT) = 0;

            //
            // Each tick period handle wired mouse and keyboard.
            //
            if(HWREGBITW(&g_ui32USBFlags, FLAG_CONNECTED) == 1)
            {
                MouseMoveHandler();
                KeyboardMain();
            }
        }

        //
        // Check for LPRF tick events.  LPRF Ticks are slower since UART to
        // RNP is much slower data connection than the USB.
        //
        if(HWREGBITW(&g_ui32Events, LPRF_TICK_EVENT) == 1)
        {
            //
            // Clear the event flag.
            //
            HWREGBITW(&g_ui32Events, LPRF_TICK_EVENT) = 0;

            //
            // Perform the LPRF Main task handling
            //
            LPRFMain();

        }

        //
        // Check for and handle motion events.
        //
        if((HWREGBITW(&g_ui32Events, MOTION_EVENT) == 1) ||
           (HWREGBITW(&g_ui32Events, MOTION_ERROR_EVENT) == 1))
        {
            //
            // Clear the motion event flag. Set in the Motion I2C interrupt
            // handler when an I2C transaction to get sensor data is complete.
            //
            HWREGBITW(&g_ui32Events, MOTION_EVENT) = 0;

            //
            // Process the motion data that has been captured
            //
            MotionMain();
        }
    }
}
Exemplo n.º 16
0
//*****************************************************************************
//
// This is the main application entry function.
//
//*****************************************************************************
int
main(void)
{

    //
    // Enable lazy stacking for interrupt handlers.  This allows floating-point
    // instructions to be used within interrupt handlers, but at the expense of
    // extra stack usage.
    //
    ROM_FPULazyStackingEnable();

    //
    // Set the clocking to run from the PLL at 50MHz
    //
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

    //
    // Enable the GPIO port that is used for the on-board LED.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);

    //
    // Enable the GPIO pins for the LED (PF2 & PF3).
    //
    ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_3 | GPIO_PIN_2 | GPIO_PIN_1);

    //
    // Open UART0 and show the application name on the UART.
    //
    ConfigureUART();

    UARTprintf("\033[2JTiva C Series USB bulk device example\n");
    UARTprintf("---------------------------------\n\n");

    //
    // Not configured initially.
    //
    g_bUSBConfigured = false;

    //
    // Enable the GPIO peripheral used for USB, and configure the USB
    // pins.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_4 | GPIO_PIN_5);

    //
    // Enable the system tick.
    //
    ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / SYSTICKS_PER_SECOND);
    ROM_SysTickIntEnable();
    ROM_SysTickEnable();

    //
    // Tell the user what we are up to.
    //
    UARTprintf("Configuring USB\n");

    //
    // Initialize the transmit and receive buffers.
    //
    USBBufferInit(&g_sTxBuffer);
    USBBufferInit(&g_sRxBuffer);

    //
    // Set the USB stack mode to Device mode with VBUS monitoring.
    //
    USBStackModeSet(0, eUSBModeForceDevice, 0);

    //
    // Pass our device information to the USB library and place the device
    // on the bus.
    //
    myBulk=USBDBulkInit(0, &g_sBulkDevice);

    //
    // Wait for initial configuration to complete.
    //
    UARTprintf("Waiting for host...\n");

    //
    // Clear our local byte counters.
    //
	while(!isUSB_ready);
	adc_cofig();
    //
    // Main application loop.
    //
    while(1)
    {	
		int readVal;
		if(txReady){
			adc_capture();
			((int*)myOutBuffer)[0]=adc_getData();
			readVal=((int*)myOutBuffer)[0];
			UARTprintf("adc = %d\n",readVal);
			txReady=0;
			USBDBulkPacketWrite(myBulk,myOutBuffer,4,true);
		}
    }
}
Exemplo n.º 17
0
//*****************************************************************************
//
// This is the main application entry function.
//
//*****************************************************************************
int
main(void)
{
    uint32_t ui32TxCount;
    uint32_t ui32RxCount;
    //uint32_t ui32Loop;

    //
    // Enable lazy stacking for interrupt handlers.  This allows floating-point
    // instructions to be used within interrupt handlers, but at the expense of
    // extra stack usage.
    //
    ROM_FPULazyStackingEnable();

    //
    // Set the clocking to run from the PLL at 50MHz
    //
#if 1
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

    //
    // Configure the required pins for USB operation.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_5 | GPIO_PIN_4);
       //ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / 100);

    /* This code taken from: http://e2e.ti.com/support/microcontrollers/tiva_arm/f/908/t/311237.aspx
    */
#else       
#include "hw_nvic.h"
       FlashErase(0x00000000);
       ROM_IntMasterDisable();
       ROM_SysTickIntDisable();
       ROM_SysTickDisable();
       uint32_t ui32SysClock;
       ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ);
       ui32SysClock = ROM_SysCtlClockGet();
       ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
       ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_4 | GPIO_PIN_5);
       ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / 100);
       HWREG(NVIC_DIS0) = 0xffffffff;
       HWREG(NVIC_DIS1) = 0xffffffff;
       HWREG(NVIC_DIS2) = 0xffffffff;
       HWREG(NVIC_DIS3) = 0xffffffff;
       HWREG(NVIC_DIS4) = 0xffffffff;
       int ui32Addr;
       for(ui32Addr = NVIC_PRI0; ui32Addr <= NVIC_PRI34; ui32Addr+=4)
       {
          HWREG(ui32Addr) = 0;
       }
       HWREG(NVIC_SYS_PRI1) = 0;
       HWREG(NVIC_SYS_PRI2) = 0;
       HWREG(NVIC_SYS_PRI3) = 0;
       ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_USB0);
       ROM_SysCtlPeripheralReset(SYSCTL_PERIPH_USB0);
       ROM_SysCtlUSBPLLEnable();
       ROM_SysCtlDelay(ui32SysClock*2 / 3);
       ROM_IntMasterEnable();
       ROM_UpdateUSB(0);
       while(1)
           {
           }
#endif
#define BOOTLOADER_TEST 0
#if BOOTLOADER_TEST
#include "hw_nvic.h"
    
    //ROM_UpdateUART();
    // May need to do the following here:
    //  0. See if this will cause bootloader to start
    //ROM_FlashErase(0); 
    //ROM_UpdateUSB(0);
    
#define SYSTICKS_PER_SECOND 100
    uint32_t ui32SysClock = ROM_SysCtlClockGet();
    ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / SYSTICKS_PER_SECOND);
    ROM_SysTickIntEnable();
    ROM_SysTickEnable();
    
    //USBDCDTerm(0);
    
    // Disable all interrupts
    ROM_IntMasterDisable();
    ROM_SysTickIntDisable();
    ROM_SysTickDisable();
    HWREG(NVIC_DIS0) = 0xffffffff;
    HWREG(NVIC_DIS1) = 0xffffffff;
    HWREG(NVIC_DIS2) = 0xffffffff;
    HWREG(NVIC_DIS3) = 0xffffffff;
    HWREG(NVIC_DIS4) = 0xffffffff;
       int ui32Addr;
       for(ui32Addr = NVIC_PRI0; ui32Addr <= NVIC_PRI34; ui32Addr+=4)
       {
          HWREG(ui32Addr) = 0;
       }
       HWREG(NVIC_SYS_PRI1) = 0;
       HWREG(NVIC_SYS_PRI2) = 0;
       HWREG(NVIC_SYS_PRI3) = 0;
    
    //  1. Enable USB PLL
    //ROM_SysCtlUSBPLLEnable();
    //  2. Enable USB controller
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_USB0);
    ROM_SysCtlPeripheralReset(SYSCTL_PERIPH_USB0);
    //USBClockEnable(USB0_BASE, 8, USB_CLOCK_INTERNAL);
    //HWREG(USB0_BASE + USB_O_CC) = (8 - 1) | USB_CLOCK_INTERNAL;

    ROM_SysCtlUSBPLLEnable();
    
    //  3. Enable USB D+ D- pins

    //  4. Activate USB DFU
    ROM_SysCtlDelay(ui32SysClock * 2 / 3);
    ROM_IntMasterEnable();  // Re-enable interrupts at NVIC level
    ROM_UpdateUSB(0);
    //  5. Should never get here since update is in progress
#endif // BOOTLOADER_TEST

    //
    // Enable the GPIO port that is used for the on-board LED.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);    // gjs Our board uses GPIOB for LEDs
    // gjs original ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);

    //
    // Enable the GPIO pins for the LED (PF2 & PF3).
    //
    ROM_GPIOPinTypeGPIOOutput(GPIO_PORTB_BASE, GPIO_PIN_0|GPIO_PIN_1);
    // gjs original ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_3|GPIO_PIN_2);

    //
    // Not configured initially.
    //
    g_bUSBConfigured = false;

    //
    // Enable the UART that we will be redirecting.
    //
    ROM_SysCtlPeripheralEnable(USB_UART_PERIPH);

    //
    // Enable and configure the UART RX and TX pins
    //
    ROM_SysCtlPeripheralEnable(TX_GPIO_PERIPH);
    ROM_SysCtlPeripheralEnable(RX_GPIO_PERIPH);
    ROM_GPIOPinTypeUART(TX_GPIO_BASE, TX_GPIO_PIN);
    ROM_GPIOPinTypeUART(RX_GPIO_BASE, RX_GPIO_PIN);

    //
    // TODO: Add code to configure handshake GPIOs if required.
    //

    //
    // Set the default UART configuration.
    //
    ROM_UARTConfigSetExpClk(USB_UART_BASE, ROM_SysCtlClockGet(),
                            DEFAULT_BIT_RATE, DEFAULT_UART_CONFIG);
    ROM_UARTFIFOLevelSet(USB_UART_BASE, UART_FIFO_TX4_8, UART_FIFO_RX4_8);

    //
    // Configure and enable UART interrupts.
    //
    ROM_UARTIntClear(USB_UART_BASE, ROM_UARTIntStatus(USB_UART_BASE, false));
    ROM_UARTIntEnable(USB_UART_BASE, (UART_INT_OE | UART_INT_BE | UART_INT_PE |
                      UART_INT_FE | UART_INT_RT | UART_INT_TX | UART_INT_RX));

    //
    // Enable the system tick.
    //
#if 0    
    ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / SYSTICKS_PER_SECOND);
    ROM_SysTickIntEnable();
    ROM_SysTickEnable();
#endif
    //
    // Initialize the transmit and receive buffers.
    //
    USBBufferInit(&g_sTxBuffer);
    USBBufferInit(&g_sRxBuffer);

    //
    // Set the USB stack mode to Device mode with VBUS monitoring.
    //
    USBStackModeSet(0, eUSBModeDevice, 0);

    //
    // Pass our device information to the USB library and place the device
    // on the bus.
    //
    USBDCDCInit(0, &g_sCDCDevice);

    //
    // Clear our local byte counters.
    //
    ui32RxCount = 0;
    ui32TxCount = 0;

    //
    // Enable interrupts now that the application is ready to start.
    //
    ROM_IntEnable(USB_UART_INT);

    // Enable FreeRTOS
    mainA(); // FreeRTOS. Will not return
    
#if 0    
    //
    // Main application loop.
    //
    while(1)
    {
        //
        // Have we been asked to update the status display?
        //
        if(g_ui32Flags & COMMAND_STATUS_UPDATE)
        {
            //
            // Clear the command flag
            //
            ROM_IntMasterDisable();
            g_ui32Flags &= ~COMMAND_STATUS_UPDATE;
            ROM_IntMasterEnable();
        }

        //
        // Has there been any transmit traffic since we last checked?
        //
        if(ui32TxCount != g_ui32UARTTxCount)
        {
            //
            // Turn on the Green LED.
            //
            // gjs ROM_UARTCharPutNonBlocking(USB_UART_BASE, 'b');

#if 1
            if (ui32TxCount & 1) {
                GPIOPinWrite(GPIO_PORTB_BASE, GPIO_PIN_0, GPIO_PIN_0);
            } else {
                GPIOPinWrite(GPIO_PORTB_BASE, GPIO_PIN_0, 0);
            }
#else            
            if (1 || g_ui32UARTTxCount & 0x01) {
                GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_3, GPIO_PIN_3);
            } else {
                //GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_3, 0);
            }

            //
            // Delay for a bit.
            //
            for(uint32_t ui32Loop = 0; ui32Loop < 150000; ui32Loop++)
            {
            }

            //
            // Turn off the Green LED.
            //
            GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_3, 0);
#endif            

            //
            // Take a snapshot of the latest transmit count.
            //
            ui32TxCount = g_ui32UARTTxCount;
        }

        //
        // Has there been any receive traffic since we last checked?
        //
        if(ui32RxCount != g_ui32UARTRxCount)
        {
            //
            // Turn on the Blue LED.
            //
#if 1
            if (ui32RxCount & 1) {
                GPIOPinWrite(GPIO_PORTB_BASE, GPIO_PIN_1, GPIO_PIN_1);
            } else {
                GPIOPinWrite(GPIO_PORTB_BASE, GPIO_PIN_1, 0);
            }
#else            
            GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, GPIO_PIN_2);

            //
            // Delay for a bit.
            //
            for(uint32_t ui32Loop = 0; ui32Loop < 150000; ui32Loop++)
            {
            }

            //
            // Turn off the Blue LED.
            //
            GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, 0);
#endif
            //
            // Take a snapshot of the latest receive count.
            //
            ui32RxCount = g_ui32UARTRxCount;

        }
    }
#endif    
}
//*****************************************************************************
//
// The program main function.  It performs initialization, then runs a loop to
// process USB activities and operate the user interface.
//
//*****************************************************************************
int
main(void)
{
    uint32_t ui32DriveTimeout;

    //
    // Enable lazy stacking for interrupt handlers.  This allows floating-point
    // instructions to be used within interrupt handlers, but at the expense of
    // extra stack usage.
    //
    ROM_FPULazyStackingEnable();

    //
    // Set the system clock to run at 50MHz from the PLL.
    //
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

    //
    // Configure the required pins for USB operation.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
    ROM_GPIOPinConfigure(GPIO_PG4_USB0EPEN);
    ROM_GPIOPinTypeUSBDigital(GPIO_PORTG_BASE, GPIO_PIN_4);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOL);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTL_BASE, GPIO_PIN_6 | GPIO_PIN_7);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);

    //
    // Configure SysTick for a 100Hz interrupt.
    //
    ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / TICKS_PER_SECOND);
    ROM_SysTickEnable();
    ROM_SysTickIntEnable();

    //
    // Enable the uDMA controller and set up the control table base.
    // The uDMA controller is used by the USB library.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UDMA);
    ROM_uDMAEnable();
    ROM_uDMAControlBaseSet(g_psDMAControlTable);

    //
    // Enable Interrupts
    //
    ROM_IntMasterEnable();

    //
    // Initialize the display driver.
    //
    CFAL96x64x16Init();

    //
    // Initialize the buttons driver.
    //
    ButtonsInit();

    //
    // Initialize two offscreen displays and assign the palette.  These
    // buffers are used by the slide menu widget to allow animation effects.
    //
    GrOffScreen4BPPInit(&g_sOffscreenDisplayA, g_pui8OffscreenBufA, 96, 64);
    GrOffScreen4BPPPaletteSet(&g_sOffscreenDisplayA, g_pui32Palette, 0,
                              NUM_PALETTE_ENTRIES);
    GrOffScreen4BPPInit(&g_sOffscreenDisplayB, g_pui8OffscreenBufB, 96, 64);
    GrOffScreen4BPPPaletteSet(&g_sOffscreenDisplayB, g_pui32Palette, 0,
                              NUM_PALETTE_ENTRIES);

    //
    // Show an initial status screen
    //
    g_pcStatusLines[0] = "Waiting";
    g_pcStatusLines[1] = "for device";
    ShowStatusScreen(g_pcStatusLines, 2);

    //
    // Add the compile-time defined widgets to the widget tree.
    //
    WidgetAdd(WIDGET_ROOT, (tWidget *)&g_sFileMenuWidget);

    //
    // Initially wait for device connection.
    //
    g_eState = STATE_NO_DEVICE;

    //
    // Initialize the USB stack for host mode.
    //
    USBStackModeSet(0, eUSBModeHost, 0);

    //
    // Register the host class drivers.
    //
    USBHCDRegisterDrivers(0, g_ppHostClassDrivers, g_ui32NumHostClassDrivers);

    //
    // Open an instance of the mass storage class driver.
    //
    g_psMSCInstance = USBHMSCDriveOpen(0, MSCCallback);

    //
    // Initialize the drive timeout.
    //
    ui32DriveTimeout = USBMSC_DRIVE_RETRY;

    //
    // Initialize the power configuration. This sets the power enable signal
    // to be active high and does not enable the power fault.
    //
    USBHCDPowerConfigInit(0, USBHCD_VBUS_AUTO_HIGH | USBHCD_VBUS_FILTER);

    //
    // Initialize the USB controller for host operation.
    //
    USBHCDInit(0, g_pui8HCDPool, HCD_MEMORY_SIZE);

    //
    // Initialize the file system.
    //
    FileInit();

    //
    // Enter an infinite loop to run the user interface and process USB
    // events.
    //
    while(1)
    {
        uint32_t ui32LastTickCount = 0;

        //
        // Call the USB stack to keep it running.
        //
        USBHCDMain();

        //
        // Process any messages in the widget message queue.  This keeps the
        // display UI running.
        //
        WidgetMessageQueueProcess();

        //
        // Take action based on the application state.
        //
        switch(g_eState)
        {
            //
            // A device has enumerated.
            //
            case STATE_DEVICE_ENUM:
            {
                //
                // Check to see if the device is ready.  If not then stay
                // in this state and we will check it again on the next pass.
                //
                if(USBHMSCDriveReady(g_psMSCInstance) != 0)
                {
                    //
                    // Wait about 500ms before attempting to check if the
                    // device is ready again.
                    //
                    ROM_SysCtlDelay(ROM_SysCtlClockGet()/(3));

                    //
                    // Decrement the retry count.
                    //
                    ui32DriveTimeout--;

                    //
                    // If the timeout is hit then go to the
                    // STATE_TIMEOUT_DEVICE state.
                    //
                    if(ui32DriveTimeout == 0)
                    {
                        g_eState = STATE_TIMEOUT_DEVICE;
                    }

                    break;
                }

                //
                // Getting here means the device is ready.
                // Reset the CWD to the root directory.
                //
                g_pcCwdBuf[0] = '/';
                g_pcCwdBuf[1] = 0;

                //
                // Set the initial directory level to the root
                //
                g_ui32Level = 0;

                //
                // We need to reset the indexes of the root menu to 0, so that
                // it will start at the top of the file list, and reset the
                // slide menu widget to start with the root menu.
                //
                g_psFileMenus[g_ui32Level].ui32CenterIndex = 0;
                g_psFileMenus[g_ui32Level].ui32FocusIndex = 0;
                SlideMenuMenuSet(&g_sFileMenuWidget, &g_psFileMenus[g_ui32Level]);

                //
                // Initiate a directory change to the root.  This will
                // populate a menu structure representing the root directory.
                //
                if(ProcessDirChange("/", g_ui32Level))
                {
                    //
                    // If there were no errors reported, we are ready for
                    // MSC operation.
                    //
                    g_eState = STATE_DEVICE_READY;

                    //
                    // Set the Device Present flag.
                    //
                    g_ui32Flags = FLAGS_DEVICE_PRESENT;

                    //
                    // Request a repaint so the file menu will be shown
                    //
                    WidgetPaint(WIDGET_ROOT);
                }

                break;
            }

            //
            // If there is no device then just wait for one.
            //
            case STATE_NO_DEVICE:
            {
                if(g_ui32Flags == FLAGS_DEVICE_PRESENT)
                {
                    //
                    // Show waiting message on screen
                    //
                    g_pcStatusLines[0] = "Waiting";
                    g_pcStatusLines[1] = "for device";
                    ShowStatusScreen(g_pcStatusLines, 2);

                    //
                    // Clear the Device Present flag.
                    //
                    g_ui32Flags &= ~FLAGS_DEVICE_PRESENT;
                }
                break;
            }

            //
            // An unknown device was connected.
            //
            case STATE_UNKNOWN_DEVICE:
            {
                //
                // If this is a new device then change the status.
                //
                if((g_ui32Flags & FLAGS_DEVICE_PRESENT) == 0)
                {
                    //
                    // Clear the screen and indicate that an unknown device
                    // is present.
                    //
                    g_pcStatusLines[0] = "Unknown";
                    g_pcStatusLines[1] = "device";
                    ShowStatusScreen(g_pcStatusLines, 2);
                }

                //
                // Set the Device Present flag.
                //
                g_ui32Flags = FLAGS_DEVICE_PRESENT;

                break;
            }

            //
            // The connected mass storage device is not reporting ready.
            //
            case STATE_TIMEOUT_DEVICE:
            {
                //
                // If this is the first time in this state then print a
                // message.
                //
                if((g_ui32Flags & FLAGS_DEVICE_PRESENT) == 0)
                {
                    //
                    //
                    // Clear the screen and indicate that an unknown device
                    // is present.
                    //
                    g_pcStatusLines[0] = "Device";
                    g_pcStatusLines[1] = "Timeout";
                    ShowStatusScreen(g_pcStatusLines, 2);
                }

                //
                // Set the Device Present flag.
                //
                g_ui32Flags = FLAGS_DEVICE_PRESENT;

                break;
            }

            //
            // The device is ready and in use.
            //
            case STATE_DEVICE_READY:
            {
                //
                // Process occurrence of timer tick.  Check for user input
                // once each tick.
                //
                if(g_ui32SysTickCount != ui32LastTickCount)
                {
                    uint8_t ui8ButtonState;
                    uint8_t ui8ButtonChanged;

                    ui32LastTickCount = g_ui32SysTickCount;

                    //
                    // Get the current debounced state of the buttons.
                    //
                    ui8ButtonState = ButtonsPoll(&ui8ButtonChanged, 0);

                    //
                    // If select button or right button is pressed, then we
                    // are trying to descend into another directory
                    //
                    if(BUTTON_PRESSED(SELECT_BUTTON,
                                      ui8ButtonState, ui8ButtonChanged) ||
                       BUTTON_PRESSED(RIGHT_BUTTON,
                                      ui8ButtonState, ui8ButtonChanged))
                    {
                        uint32_t ui32NewLevel;
                        uint32_t ui32ItemIdx;
                        char *pcItemName;

                        //
                        // Get a pointer to the current menu for this CWD.
                        //
                        tSlideMenu *psMenu = &g_psFileMenus[g_ui32Level];

                        //
                        // Get the highlighted index in the current file list.
                        // This is the currently highlighted file or dir
                        // on the display.  Then get the name of the file at
                        // this index.
                        //
                        ui32ItemIdx = SlideMenuFocusItemGet(psMenu);
                        pcItemName = psMenu->psSlideMenuItems[ui32ItemIdx].pcText;

                        //
                        // Make sure we are not yet past the maximum tree
                        // depth.
                        //
                        if(g_ui32Level < MAX_SUBDIR_DEPTH)
                        {
                            //
                            // Potential new level is one greater than the
                            // current level.
                            //
                            ui32NewLevel = g_ui32Level + 1;

                            //
                            // Process the directory change to the new
                            // directory.  This function will populate a menu
                            // structure with the files and subdirs in the new
                            // directory.
                            //
                            if(ProcessDirChange(pcItemName, ui32NewLevel))
                            {
                                //
                                // If the change was successful, then update
                                // the level.
                                //
                                g_ui32Level = ui32NewLevel;

                                //
                                // Now that all the prep is done, send the
                                // KEY_RIGHT message to the widget and it will
                                // "slide" from the previous file list to the
                                // new file list of the CWD.
                                //
                                SendWidgetKeyMessage(WIDGET_MSG_KEY_RIGHT);

                            }
                        }
                    }

                    //
                    // If the UP button is pressed, just pass it to the widget
                    // which will handle scrolling the list of files.
                    //
                    if(BUTTON_PRESSED(UP_BUTTON, ui8ButtonState, ui8ButtonChanged))
                    {
                        SendWidgetKeyMessage(WIDGET_MSG_KEY_UP);
                    }

                    //
                    // If the DOWN button is pressed, just pass it to the widget
                    // which will handle scrolling the list of files.
                    //
                    if(BUTTON_PRESSED(DOWN_BUTTON, ui8ButtonState, ui8ButtonChanged))
                    {
                        SendWidgetKeyMessage(WIDGET_MSG_KEY_DOWN);
                    }

                    //
                    // If the LEFT button is pressed, then we are attempting
                    // to go up a level in the file system.
                    //
                    if(BUTTON_PRESSED(LEFT_BUTTON, ui8ButtonState, ui8ButtonChanged))
                    {
                        uint32_t ui32NewLevel;

                        //
                        // Make sure we are not already at the top of the
                        // directory tree (at root).
                        //
                        if(g_ui32Level)
                        {
                            //
                            // Potential new level is one less than the
                            // current level.
                            //
                            ui32NewLevel = g_ui32Level - 1;

                            //
                            // Process the directory change to the new
                            // directory.  This function will populate a menu
                            // structure with the files and subdirs in the new
                            // directory.
                            //
                            if(ProcessDirChange("..", ui32NewLevel))
                            {
                                //
                                // If the change was successful, then update
                                // the level.
                                //
                                g_ui32Level = ui32NewLevel;

                                //
                                // Now that all the prep is done, send the
                                // KEY_LEFT message to the widget and it will
                                // "slide" from the previous file list to the
                                // new file list of the CWD.
                                //
                                SendWidgetKeyMessage(WIDGET_MSG_KEY_LEFT);
                            }
                        }
                    }
                }
                break;
            }
            //
            // Something has caused a power fault.
            //
            case STATE_POWER_FAULT:
            {
                //
                // Clear the screen and show a power fault indication.
                //
                g_pcStatusLines[0] = "Power";
                g_pcStatusLines[1] = "fault";
                ShowStatusScreen(g_pcStatusLines, 2);
                break;
            }

            default:
            {
                break;
            }
        }
    }
}
//*****************************************************************************
//
//! Configures the device pins for the standard usages on the EK-TM4C1294XL.
//!
//! \param bEthernet is a boolean used to determine function of Ethernet pins.
//! If true Ethernet pins are  configured as Ethernet LEDs.  If false GPIO are
//! available for application use.
//! \param bUSB is a boolean used to determine function of USB pins. If true USB
//! pins are configured for USB use.  If false then USB pins are available for
//! application use as GPIO.
//!
//! This function enables the GPIO modules and configures the device pins for
//! the default, standard usages on the EK-TM4C1294XL.  Applications that
//! require alternate configurations of the device pins can either not call
//! this function and take full responsibility for configuring all the device
//! pins, or can reconfigure the required device pins after calling this
//! function.
//!
//! \return None.
//
//*****************************************************************************
void
PinoutSet(bool bEthernet, bool bUSB)
{
    //
    // Enable all the GPIO peripherals.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOH);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOJ);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOK);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOL);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOM);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPION);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOP);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOQ);

    //
    // PA0-1 are used for UART0.
    //
    ROM_GPIOPinConfigure(GPIO_PA0_U0RX);
    ROM_GPIOPinConfigure(GPIO_PA1_U0TX);
    ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);

    //
    // PB0-1/PD6/PL6-7 are used for USB.
    // PQ4 can be used as a power fault detect on this board but it is not
    // the hardware peripheral power fault input pin.
    //
    if(bUSB)
    {
        HWREG(GPIO_PORTD_BASE + GPIO_O_LOCK) = GPIO_LOCK_KEY;
        HWREG(GPIO_PORTD_BASE + GPIO_O_CR) = 0xff;
        ROM_GPIOPinConfigure(GPIO_PD6_USB0EPEN);
        ROM_GPIOPinTypeUSBAnalog(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);
        ROM_GPIOPinTypeUSBDigital(GPIO_PORTD_BASE, GPIO_PIN_6);
        ROM_GPIOPinTypeUSBAnalog(GPIO_PORTL_BASE, GPIO_PIN_6 | GPIO_PIN_7);
        ROM_GPIOPinTypeGPIOInput(GPIO_PORTQ_BASE, GPIO_PIN_4);
    }
    else
    {
        //
        // Keep the default config for most pins used by USB.
        // Add a pull down to PD6 to turn off the TPS2052 switch
        //
        ROM_GPIOPinTypeGPIOInput(GPIO_PORTD_BASE, GPIO_PIN_6);
        MAP_GPIOPadConfigSet(GPIO_PORTD_BASE, GPIO_PIN_6, GPIO_STRENGTH_2MA,
                             GPIO_PIN_TYPE_STD_WPD);

    }

    //
    // PF0/PF4 are used for Ethernet LEDs.
    //
    if(bEthernet)
    {
        //
        // this app wants to configure for ethernet LED function.
        //
        ROM_GPIOPinConfigure(GPIO_PF0_EN0LED0);
        ROM_GPIOPinConfigure(GPIO_PF4_EN0LED1);

        GPIOPinTypeEthernetLED(GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_4);

    }
    else
    {

        //
        // This app does not want Ethernet LED function so configure as
        // standard outputs for LED driving.
        //
        ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_4);

        //
        // Default the LEDs to OFF.
        //
        ROM_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_4, 0);
        MAP_GPIOPadConfigSet(GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_4,
                             GPIO_STRENGTH_12MA, GPIO_PIN_TYPE_STD);


    }

    //
    // PJ0 and J1 are used for user buttons
    //
    ROM_GPIOPinTypeGPIOInput(GPIO_PORTJ_BASE, GPIO_PIN_0 | GPIO_PIN_1);
    ROM_GPIOPinWrite(GPIO_PORTJ_BASE, GPIO_PIN_0 | GPIO_PIN_1, 0);

    //
    // PN0 and PN1 are used for USER LEDs.
    //
    ROM_GPIOPinTypeGPIOOutput(GPIO_PORTN_BASE, GPIO_PIN_0 | GPIO_PIN_1);
    MAP_GPIOPadConfigSet(GPIO_PORTN_BASE, GPIO_PIN_0 | GPIO_PIN_1,
                             GPIO_STRENGTH_12MA, GPIO_PIN_TYPE_STD);

    //
    // Default the LEDs to OFF.
    //
    ROM_GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_0 | GPIO_PIN_1, 0);
}
Exemplo n.º 20
0
//*****************************************************************************
//
// This is the main loop that runs the application.
//
//*****************************************************************************
int
main(void)
{
    uint8_t ui8ButtonsChanged, ui8Buttons;
    bool bUpdate;

    //
    // Set the clocking to run from the PLL at 50MHz
    //
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

    //
    // Enable the GPIO port that is used for the on-board LED.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);

    //
    // Enable the GPIO pin for the Blue LED (PF2).
    //
    ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_2);

    //
    // Open UART0 and show the application name on the UART.
    //
    ConfigureUART();

    UARTprintf("\033[2JTiva C Series USB gamepad device example\n");
    UARTprintf("---------------------------------\n\n");

    //
    // Not configured initially.
    //
    g_iGamepadState = eStateNotConfigured;

    //
    // Enable the GPIO peripheral used for USB, and configure the USB
    // pins.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
    SysCtlGPIOAHBEnable(SYSCTL_PERIPH_GPIOD);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_AHB_BASE, GPIO_PIN_4 | GPIO_PIN_5);

    //
    // Configure the GPIOS for the buttons.
    //
    ButtonsInit();

    //
    // Initialize the ADC channels.
    //
    ADCInit();

    //
    // Tell the user what we are up to.
    //
    UARTprintf("Configuring USB\n");

    //
    // Set the USB stack mode to Device mode.
    //
    USBStackModeSet(0, eUSBModeForceDevice, 0);

    //
    // Pass the device information to the USB library and place the device
    // on the bus.
    //
    USBDHIDGamepadInit(0, &g_sGamepadDevice);

    //
    // Zero out the initial report.
    //
    sReport.ui8Buttons = 0;
    sReport.i8XPos = 0;
    sReport.i8YPos = 0;
    sReport.i8ZPos = 0;

    //
    // Tell the user what we are doing and provide some basic instructions.
    //
    UARTprintf("\nWaiting For Host...\n");

    //
    // Trigger an initial ADC sequence.
    //
    ADCProcessorTrigger(ADC0_BASE, 0);

    //
    // The main loop starts here.  We begin by waiting for a host connection
    // then drop into the main gamepad handling section.  If the host
    // disconnects, we return to the top and wait for a new connection.
    //
    while(1)
    {
        //
        // Wait here until USB device is connected to a host.
        //
        if(g_iGamepadState == eStateIdle)
        {
            //
            // No update by default.
            //
            bUpdate = false;

            //
            // See if the buttons updated.
            //
            ButtonsPoll(&ui8ButtonsChanged, &ui8Buttons);

            sReport.ui8Buttons = 0;

            //
            // Set button 1 if left pressed.
            //
            if(ui8Buttons & LEFT_BUTTON)
            {
                sReport.ui8Buttons |= 0x01;
            }

            //
            // Set button 2 if right pressed.
            //
            if(ui8Buttons & RIGHT_BUTTON)
            {
                sReport.ui8Buttons |= 0x02;
            }

            if(ui8ButtonsChanged)
            {
                bUpdate = true;
            }

            //
            // See if the ADC updated.
            //
            if(ADCIntStatus(ADC0_BASE, 0, false) != 0)
            {
                //
                // Clear the ADC interrupt.
                //
                ADCIntClear(ADC0_BASE, 0);

                //
                // Read the data and trigger a new sample request.
                //
                ADCSequenceDataGet(ADC0_BASE, 0, &g_pui32ADCData[0]);
                ADCProcessorTrigger(ADC0_BASE, 0);

                //
                // Update the report.
                //
                sReport.i8XPos = Convert8Bit(g_pui32ADCData[0]);
                sReport.i8YPos = Convert8Bit(g_pui32ADCData[1]);
                sReport.i8ZPos = Convert8Bit(g_pui32ADCData[2]);
                bUpdate = true;
            }

            //
            // Send the report if there was an update.
            //
            if(bUpdate)
            {
                USBDHIDGamepadSendReport(&g_sGamepadDevice, &sReport,
                                         sizeof(sReport));

                //
                // Now sending data but protect this from an interrupt since
                // it can change in interrupt context as well.
                //
                IntMasterDisable();
                g_iGamepadState = eStateSending;
                IntMasterEnable();

                //
                // Limit the blink rate of the LED.
                //
                if(g_ui32Updates++ == 40)
                {
                    //
                    // Turn on the blue LED.
                    //
                    ROM_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, GPIO_PIN_2);

                    //
                    // Reset the update count.
                    //
                    g_ui32Updates = 0;
                }
            }
        }
    }
}
Exemplo n.º 21
0
//*****************************************************************************
//
// This is the main application entry function.
//
//*****************************************************************************
int
main(void)
{
    uint_fast32_t ui32TxCount;
    uint_fast32_t ui32RxCount;
    tRectangle sRect;
    char pcBuffer[16];

    //
    // Enable lazy stacking for interrupt handlers.  This allows floating-point
    // instructions to be used within interrupt handlers, but at the expense of
    // extra stack usage.
    //
    ROM_FPULazyStackingEnable();

    //
    // Set the clocking to run from the PLL at 50MHz
    //
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

#ifdef DEBUG
    //
    // Configure the UART for debug output.
    //
    ConfigureUART();
#endif

    //
    // Not configured initially.
    //
    g_bUSBConfigured = false;

    //
    // Initialize the display driver.
    //
    CFAL96x64x16Init();

    //
    // Initialize the graphics context.
    //
    GrContextInit(&g_sContext, &g_sCFAL96x64x16);

    //
    // Fill the top part of the screen with blue to create the banner.
    //
    sRect.i16XMin = 0;
    sRect.i16YMin = 0;
    sRect.i16XMax = GrContextDpyWidthGet(&g_sContext) - 1;
    sRect.i16YMax = 9;
    GrContextForegroundSet(&g_sContext, ClrDarkBlue);
    GrRectFill(&g_sContext, &sRect);

    //
    // Change foreground for white text.
    //
    GrContextForegroundSet(&g_sContext, ClrWhite);

    //
    // Put the application name in the middle of the banner.
    //
    GrContextFontSet(&g_sContext, g_psFontFixed6x8);
    GrStringDrawCentered(&g_sContext, "usb-dev-bulk", -1,
                         GrContextDpyWidthGet(&g_sContext) / 2, 4, 0);

    //
    // Show the various static text elements on the color STN display.
    //
    GrStringDraw(&g_sContext, "Tx bytes:", -1, 0, 32, false);
    GrStringDraw(&g_sContext, "Rx bytes:", -1, 0, 42, false);

    //
    // Enable the GPIO peripheral used for USB, and configure the USB
    // pins.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOL);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTL_BASE, GPIO_PIN_6 | GPIO_PIN_7);

    //
    // Enable the system tick.
    //
    ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / SYSTICKS_PER_SECOND);
    ROM_SysTickIntEnable();
    ROM_SysTickEnable();

    //
    // Show the application name on the display and UART output.
    //
    DEBUG_PRINT("\nTiva C Series USB bulk device example\n");
    DEBUG_PRINT("---------------------------------\n\n");

    //
    // Tell the user what we are up to.
    //
    DisplayStatus(&g_sContext, "Configuring USB");

    //
    // Initialize the transmit and receive buffers.
    //
    USBBufferInit(&g_sTxBuffer);
    USBBufferInit(&g_sRxBuffer);

    //
    // Pass our device information to the USB library and place the device
    // on the bus.
    //
    USBDBulkInit(0, &g_sBulkDevice);

    //
    // Wait for initial configuration to complete.
    //
    DisplayStatus(&g_sContext, "Waiting for host");

    //
    // Clear our local byte counters.
    //
    ui32RxCount = 0;
    ui32TxCount = 0;

    //
    // Main application loop.
    //
    while(1)
    {

        //
        // Have we been asked to update the status display?
        //
        if(g_ui32Flags & COMMAND_STATUS_UPDATE)
        {
            //
            // Clear the command flag
            //
            g_ui32Flags &= ~COMMAND_STATUS_UPDATE;
            DisplayStatus(&g_sContext, g_pcStatus);
        }

        //
        // Has there been any transmit traffic since we last checked?
        //
        if(ui32TxCount != g_ui32TxCount)
        {
            //
            // Take a snapshot of the latest transmit count.
            //
            ui32TxCount = g_ui32TxCount;

            //
            // Update the display of bytes transmitted by the UART.
            //
            usnprintf(pcBuffer, 16, " %d ", ui32TxCount);
            GrStringDraw(&g_sContext, pcBuffer, -1, 48, 32, true);
        }

        //
        // Has there been any receive traffic since we last checked?
        //
        if(ui32RxCount != g_ui32RxCount)
        {
            //
            // Take a snapshot of the latest receive count.
            //
            ui32RxCount = g_ui32RxCount;

            //
            // Update the display of bytes received by the UART.
            //
            usnprintf(pcBuffer, 16, " %d ", ui32RxCount);
            GrStringDraw(&g_sContext, pcBuffer, -1, 48, 42, true);
        }
    }
}
Exemplo n.º 22
0
//*****************************************************************************
//
// This is the main loop that runs the application.
//
//*****************************************************************************
int
main(void)
{
    uint_fast32_t ui32LastTickCount;
    bool bLastSuspend;


    //
    // Enable lazy stacking for interrupt handlers.  This allows floating-point
    // instructions to be used within interrupt handlers, but at the expense of
    // extra stack usage.
    //
    ROM_FPULazyStackingEnable();

    //
    // Set the clocking to run from the PLL at 50MHz.
    //
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                       SYSCTL_XTAL_16MHZ);

    //
    // Enable the GPIO port that is used for the on-board LED.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);

    //
    // Enable the GPIO pin for the Blue LED (PF2).
    //
    ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3);

    //
    // Enable the UART.
    //
    ConfigureUART();
    UARTprintf("Keyboard device application\n");

    // Configure USB0DM & USB0DP (PD4 & PD5)
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
    SysCtlGPIOAHBEnable(SYSCTL_PERIPH_GPIOD);
    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_AHB_BASE, GPIO_PIN_4 | GPIO_PIN_5);

    //Configure USB0ID & USB0VBUS (PB0 & PB1)
//    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
//    ROM_GPIOPinTypeUSBAnalog(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);


    //
    // Erratum workaround for silicon revision A1.  VBUS must have pull-down.
    //
    if(CLASS_IS_TM4C123 && REVISION_IS_A1)
    {
        HWREG(GPIO_PORTB_BASE + GPIO_O_PDR) |= GPIO_PIN_1;
    }


    //
    // Initialize the buttons driver
    //
    ButtonsInit();

    //
    // Not configured initially.
    //
    g_bConnected = false;
    g_bSuspended = false;
    bLastSuspend = false;

    //
    // Initialize the USB stack for device mode.
    //
    //USBStackModeSet(0, eUSBModeDevice, 0);
    USBStackModeSet(0, eUSBModeForceDevice, 0);
    //
    // Pass our device information to the USB HID device class driver,
    // initialize the USB
    // controller and connect the device to the bus.
    //
    USBDHIDKeyboardInit(0, &g_sKeyboardDevice);

    //
    // Set the system tick to fire 100 times per second.
    //
    ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / SYSTICKS_PER_SECOND);
    ROM_SysTickIntEnable();
    ROM_SysTickEnable();

    //
    // The main loop starts here.  We begin by waiting for a host connection
    // then drop into the main keyboard handling section.  If the host
    // disconnects, we return to the top and wait for a new connection.
    //
    while(1)
    {
        uint8_t ui8Buttons;
        uint8_t ui8ButtonsChanged;

        //
        // Tell the user what we are doing and provide some basic instructions.
        //
        UARTprintf("Waiting for host...\n");

        //
        // Wait here until USB device is connected to a host.
        //
        while(!g_bConnected)
        {
        }

        //
        // Update the status.
        //
        UARTprintf("Host connected...\n");

        //
        // Enter the idle state.
        //
        g_eKeyboardState = STATE_IDLE;

        //
        // Assume that the bus is not currently suspended if we have just been
        // configured.
        //
        bLastSuspend = false;

        //
        // Keep transferring characters from the UART to the USB host for as
        // long as we are connected to the host.
        //
        while(g_bConnected)
        {
            //
            // Remember the current time.
            //
            ui32LastTickCount = g_ui32SysTickCount;

            //
            // Has the suspend state changed since last time we checked?
            //
            if(bLastSuspend != g_bSuspended)
            {
                //
                // Yes - the state changed so update the display.
                //
                bLastSuspend = g_bSuspended;
                UARTprintf(bLastSuspend ? "Bus suspended...\n" :"Host connected...\n");
            }

            //
            // See if the button was just pressed.
            //
            ui8Buttons = ButtonsPoll(&ui8ButtonsChanged, 0);
            if(BUTTON_PRESSED(LEFT_BUTTON, ui8Buttons, ui8ButtonsChanged))
            {
                //
                // If the bus is suspended then resume it.  Otherwise, type
                // some "random" characters.
                //
                if(g_bSuspended)
                {
                    USBDHIDKeyboardRemoteWakeupRequest(
                                                   (void *)&g_sKeyboardDevice);
                }
                else
                {
                    SendString("Make the Switch to TI Microcontrollers!");
                }
            }

            //
            // Wait for at least 1 system tick to have gone by before we poll
            // the buttons again.
            //
            while(g_ui32SysTickCount == ui32LastTickCount)
            {

            }
        }

        //
        // Dropping out of the previous loop indicates that the host has
        // disconnected so go back and wait for reconnection.
        //

        if(g_bConnected == false)
                {
                    UARTprintf("Host disconnected...\n");
                }

    }
}