int main(void) {
uint8_t ucState;
uint8_t ucDelta;
uint8_t ui8LedData=2;
SysCtlClockSet(SYSCTL_SYSDIV_5|SYSCTL_USE_PLL|SYSCTL_XTAL_16MHZ|SYSCTL_OSC_MAIN);
ButtonsInit();
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE,GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3);
while(1){
ucState = ButtonsPoll(&ucDelta,0);
if(BUTTON_PRESSED(LEFT_BUTTON,ucState,ucDelta)){
GPIOPinWrite(GPIO_PORTF_BASE,GPIO_PIN_1,ui8LedData);
ui8LedData^=1<<1;
}
}
return 0;
}
//*****************************************************************************
//
// Called by the NVIC as a result of SysTick Timer rollover interrupt flag
//
// Checks buttons and calls AppButtonHandler to manage button events.
// Tracks time and auto mode color stepping. Calls AppRainbow to implement
// RGB color changes.
//
//*****************************************************************************
void
SysTickIntHandler(void)
{
static float x;
g_sAppState.ui32Buttons = ButtonsPoll(0,0);
AppButtonHandler();
//
// Auto increment the color wheel if in the AUTO mode. AUTO mode is when
// device is active but user interaction has timed out.
//
if(g_sAppState.ui32Mode == APP_MODE_AUTO) {
g_sAppState.fColorWheelPos += APP_AUTO_COLOR_STEP;
}
//
// Provide wrap around of the control variable from 0 to 1.5 times PI
//
if(g_sAppState.fColorWheelPos > (APP_PI * 1.5f)) {
g_sAppState.fColorWheelPos = 0.0f;
}
if(x < 0.0f) {
g_sAppState.fColorWheelPos = APP_PI * 1.5f;
}
//
// Set the RGB Color based on current control variable value.
//
AppRainbow(0);
}
int main(void)
{
// TivaC application specific code
MAP_FPUEnable();
MAP_FPULazyStackingEnable();
// TivaC system clock configuration. Set to 80MHz.
MAP_SysCtlClockSet(SYSCTL_SYSDIV_2_5 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ | SYSCTL_OSC_MAIN);
uint8_t button_debounced_delta;
uint8_t button_raw_state;
ButtonsInit();
// ROS nodehandle initialization and topic registration
nh.initNode();
nh.advertise(button_publisher);
while (1)
{
uint8_t button_debounced_state = ButtonsPoll(&button_debounced_delta, &button_raw_state);
// Publish message to be transmitted.
button_msg.sw1.data = button_debounced_state & LEFT_BUTTON;
button_msg.sw2.data = button_debounced_state & RIGHT_BUTTON;
button_publisher.publish(&button_msg);
// Handle all communications and callbacks.
nh.spinOnce();
// Delay for a bit.
nh.getHardware()->delay(100);
}
}
//*****************************************************************************
//
// This is the interrupt handler for the SysTick interrupt. It is called
// periodically and updates a global tick counter then sets a flag to tell the
// main loop to move the mouse.
//
//*****************************************************************************
void
SysTickIntHandler(void)
{
g_ui32SysTickCount++;
HWREGBITW(&g_ui32Events, USB_TICK_EVENT) = 1;
HWREGBITW(&g_ui32Events, LPRF_TICK_EVENT) = 1;
g_ui8Buttons = ButtonsPoll(0, 0);
}
void
SysTickIntHandler(void)
{
g_sAppState.ulButtons = ButtonsPoll(0,0);
AppButtonHandler();
}
void checkButtons(void) {
uint8_t button_state = 0;
uint8_t button_changed = 0;
button_state = ButtonsPoll(&button_changed,0);
switch (button_changed & ALL_BUTTONS) {
case LEFT_BUTTON:
if (button_state & LEFT_BUTTON) {
iniciaLeituraSonar(sonar_select);
}
break;
case RIGHT_BUTTON:
if (button_state & RIGHT_BUTTON) {
iniciaLeituraMPU6050();
}
break;
}
}
int main (void)
{
SysCtlClockSet (SYSCTL_SYSDIV_2_5 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | SYSCTL_XTAL_25MHZ);
configureUART ();
printf ("cpu-gauge.\r\n");
// Enable the GPIO port that is used for the on-board LED.
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3);
// // USB config : Enable the GPIO peripheral used for USB, and configure the USB pins.
// SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
// SysCtlGPIOAHBEnable(SYSCTL_PERIPH_GPIOD);
// GPIOPinTypeUSBAnalog(GPIO_PORTD_AHB_BASE, GPIO_PIN_4 | GPIO_PIN_5);
// ButtonsInit();
// printf ("Buttons OK.\r\n");
motorInit ();
printf ("Motor initialized.\r\n");
printf ("Test sequence : +40 steps.\r\n");
motorRun (40);
printf ("Test sequence : -40 steps.\r\n");
motorRun (-40);
printf ("Test sequence : OK.\r\n");
SysCtlDelay (DELAY_COEFFICIENT_SCD / 10);
uint8_t ui8ButtonsChanged, ui8Buttons;
while (1) {
ButtonsPoll(&ui8ButtonsChanged, &ui8Buttons);
if (ui8ButtonsChanged) {
if(ui8Buttons & LEFT_BUTTON)
{
printf ("pressed\r\n");
}
else {
printf ("released\r\n");
}
}
}
}
//*****************************************************************************
//
// The SysTick handler. Increments a tick counter and debounces the push
// button.
//
//*****************************************************************************
void
SysTickHandler(void)
{
uint8_t ui8Data, ui8Delta;
//
// Increment the tick counter.
//
g_ui32SysTickCount++;
//
// Get buttons status using button debouncer driver
//
ui8Data = ButtonsPoll(&ui8Delta, 0);
//
// See if the select button was just pressed.
//
if(BUTTON_PRESSED(SELECT_BUTTON, ui8Data, ui8Delta))
{
//
// Set a flag to indicate that the select button was just pressed.
//
bSelectPressed = 1;
}
//
// Else, see if the select button was just released.
//
if(BUTTON_RELEASED(SELECT_BUTTON, ui8Data, ui8Delta))
{
//
// Clear the button pressed flag.
//
bSelectPressed = 0;
}
}
//*****************************************************************************
//
// Initialize and operate the data logger.
//
//*****************************************************************************
int
main(void)
{
tContext sDisplayContext, sBufferContext;
uint32_t ui32HibIntStatus, ui32SysClock, ui32LastTickCount;
bool bSkipSplash;
uint8_t ui8ButtonState, ui8ButtonChanged;
uint_fast8_t ui8X, ui8Y;
//
// 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.
//
MAP_FPULazyStackingEnable();
//
// Set the clocking to run at 50 MHz.
//
MAP_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ |
SYSCTL_OSC_MAIN);
ui32SysClock = MAP_SysCtlClockGet();
//
// Initialize locals.
//
bSkipSplash = false;
ui32LastTickCount = 0;
//
// Initialize the data acquisition module. This initializes the ADC
// hardware.
//
AcquireInit();
//
// Enable access to the hibernate peripheral. If the hibernate peripheral
// was already running then this will have no effect.
//
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_HIBERNATE);
//
// Check to see if the hiberate module is already active and if so then
// read the saved configuration state. If both are okay, then proceed
// to check and see if we are logging data using sleep mode.
//
if(HibernateIsActive() && !GetSavedState(&g_sConfigState))
{
//
// Read the status of the hibernate module.
//
ui32HibIntStatus = HibernateIntStatus(1);
//
// If this is a pin wake, that means the user pressed the select
// button and we should terminate the sleep logging. In this case
// we will fall out of this conditional section, and go through the
// normal startup below, but skipping the splash screen so the user
// gets immediate response.
//
if(ui32HibIntStatus & HIBERNATE_INT_PIN_WAKE)
{
//
// Clear the interrupt flag so it is not seen again until another
// wake.
//
HibernateIntClear(HIBERNATE_INT_PIN_WAKE);
bSkipSplash = true;
}
//
// Otherwise if we are waking from hibernate and it was not a pin
// wake, then it must be from RTC match. Check to see if we are
// sleep logging and if so then go through an abbreviated startup
// in order to collect the data and go back to sleep.
//
else if(g_sConfigState.ui32SleepLogging &&
(ui32HibIntStatus & HIBERNATE_INT_RTC_MATCH_0))
{
//
// Start logger and pass the configuration. The logger should
// configure itself to take one sample.
//
AcquireStart(&g_sConfigState);
g_iLoggerState = eSTATE_LOGGING;
//
// Enter a forever loop to run the acquisition. This will run
// until a new sample has been taken and stored.
//
while(!AcquireRun())
{
}
//
// Getting here means that a data acquisition was performed and we
// can now go back to sleep. Save the configuration and then
// activate the hibernate.
//
SetSavedState(&g_sConfigState);
//
// Set wake condition on pin-wake or RTC match. Then put the
// processor in hibernation.
//
HibernateWakeSet(HIBERNATE_WAKE_PIN | HIBERNATE_WAKE_RTC);
HibernateRequest();
//
// Hibernating takes a finite amount of time to occur, so wait
// here forever until hibernate activates and the processor
// power is removed.
//
for(;;)
{
}
}
//
// Otherwise, this was not a pin wake, and we were not sleep logging,
// so just fall out of this conditional and go through the normal
// startup below.
//
}
else
{
//
// In this case, either the hibernate module was not already active, or
// the saved configuration was not valid. Initialize the configuration
// to the default state and then go through the normal startup below.
//
GetDefaultState(&g_sConfigState);
}
//
// Enable the Hibernate module to run.
//
HibernateEnableExpClk(SysCtlClockGet());
//
// The hibernate peripheral trim register must be set per silicon
// erratum 2.1
//
HibernateRTCTrimSet(0x7FFF);
//
// Start the RTC running. If it was already running then this will have
// no effect.
//
HibernateRTCEnable();
//
// In case we were sleep logging and are now finished (due to user
// pressing select button), then disable sleep logging so it doesnt
// try to start up again.
//
g_sConfigState.ui32SleepLogging = 0;
SetSavedState(&g_sConfigState);
//
// Initialize the display driver.
//
CFAL96x64x16Init();
//
// Initialize the buttons driver.
//
ButtonsInit();
//
// Pass the restored state to the menu system.
//
MenuSetState(&g_sConfigState);
//
// Enable the USB peripheral
//
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_USB0);
//
// Configure the required pins for USB operation.
//
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
MAP_GPIOPinConfigure(GPIO_PG4_USB0EPEN);
MAP_GPIOPinTypeUSBDigital(GPIO_PORTG_BASE, GPIO_PIN_4);
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOL);
MAP_GPIOPinTypeUSBAnalog(GPIO_PORTL_BASE, GPIO_PIN_6 | GPIO_PIN_7);
MAP_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;
}
//
// Initialize the USB stack mode and pass in a mode callback.
//
USBStackModeSet(0, eUSBModeOTG, ModeCallback);
//
// Initialize the stack to be used with USB stick.
//
USBStickInit();
//
// Initialize the stack to be used as a serial device.
//
USBSerialInit();
//
// Initialize the USB controller for dual mode operation with a 2ms polling
// rate.
//
USBOTGModeInit(0, 2000, g_pui8HCDPool, HCD_MEMORY_SIZE);
//
// Initialize the menus module. This module will control the user
// interface menuing system.
//
MenuInit(WidgetActivated);
//
// Configure SysTick to periodically interrupt.
//
g_ui32TickCount = 0;
MAP_SysTickPeriodSet(ui32SysClock / CLOCK_RATE);
MAP_SysTickIntEnable();
MAP_SysTickEnable();
//
// Initialize the display context and another context that is used
// as an offscreen drawing buffer for display animation effect
//
GrContextInit(&sDisplayContext, &g_sCFAL96x64x16);
GrContextInit(&sBufferContext, &g_sOffscreenDisplayA);
//
// Show the splash screen if we are not skipping it. The only reason to
// skip it is if the application was in sleep-logging mode and the user
// just waked it up with the select button.
//
if(!bSkipSplash)
{
const uint8_t *pui8SplashLogo = g_pui8Image_TI_Black;
//
// Draw the TI logo on the display. Use an animation effect where the
// logo will "slide" onto the screen. Allow select button to break
// out of animation.
//
for(ui8X = 0; ui8X < 96; ui8X++)
{
if(ButtonsPoll(0, 0) & SELECT_BUTTON)
{
break;
}
GrImageDraw(&sDisplayContext, pui8SplashLogo, 95 - ui8X, 0);
}
//
// Leave the logo on the screen for a long duration. Monitor the
// buttons so that if the user presses the select button, the logo
// display is terminated and the application starts immediately.
//
while(g_ui32TickCount < 400)
{
if(ButtonsPoll(0, 0) & SELECT_BUTTON)
{
break;
}
}
//
// Extended splash sequence
//
if(ButtonsPoll(0, 0) & UP_BUTTON)
{
for(ui8X = 0; ui8X < 96; ui8X += 4)
{
GrImageDraw(&sDisplayContext,
g_ppui8Image_Splash[(ui8X / 4) & 3],
(int32_t)ui8X - 96L, 0);
GrImageDraw(&sDisplayContext, pui8SplashLogo, ui8X, 0);
MAP_SysCtlDelay(ui32SysClock / 12);
}
MAP_SysCtlDelay(ui32SysClock / 3);
pui8SplashLogo = g_ppui8Image_Splash[4];
GrImageDraw(&sDisplayContext, pui8SplashLogo, 0, 0);
MAP_SysCtlDelay(ui32SysClock / 12);
}
//
// Draw the initial menu into the offscreen buffer.
//
SlideMenuDraw(&g_sMenuWidget, &sBufferContext, 0);
//
// Now, draw both the TI logo splash screen (from above) and the initial
// menu on the screen at the same time, moving the coordinates so that
// the logo "slides" off the display and the menu "slides" onto the
// display.
//
for(ui8Y = 0; ui8Y < 64; ui8Y++)
{
GrImageDraw(&sDisplayContext, pui8SplashLogo, 0, -ui8Y);
GrImageDraw(&sDisplayContext, g_pui8OffscreenBufA, 0, 63 - ui8Y);
}
}
//
// Add the menu widget to the widget tree and send an initial paint
// request.
//
WidgetAdd(WIDGET_ROOT, (tWidget *)&g_sMenuWidget);
WidgetPaint(WIDGET_ROOT);
//
// Set the focus handle to the menu widget. Any button events will be
// sent to this widget
//
g_ui32KeyFocusWidgetHandle = (uint32_t)&g_sMenuWidget;
//
// Forever loop to run the application
//
while(1)
{
//
// Each time the timer tick occurs, process any button events.
//
if(g_ui32TickCount != ui32LastTickCount)
{
//
// Remember last tick count
//
ui32LastTickCount = g_ui32TickCount;
//
// Read the debounced state of the buttons.
//
ui8ButtonState = ButtonsPoll(&ui8ButtonChanged, 0);
//
// Pass any button presses through to the widget message
// processing mechanism. The widget that has the button event
// focus (probably the menu widget) will catch these button events.
//
if(BUTTON_PRESSED(SELECT_BUTTON, ui8ButtonState, ui8ButtonChanged))
{
SendWidgetKeyMessage(WIDGET_MSG_KEY_SELECT);
}
if(BUTTON_PRESSED(UP_BUTTON, ui8ButtonState, ui8ButtonChanged))
{
SendWidgetKeyMessage(WIDGET_MSG_KEY_UP);
}
if(BUTTON_PRESSED(DOWN_BUTTON, ui8ButtonState, ui8ButtonChanged))
{
SendWidgetKeyMessage(WIDGET_MSG_KEY_DOWN);
}
if(BUTTON_PRESSED(LEFT_BUTTON, ui8ButtonState, ui8ButtonChanged))
{
SendWidgetKeyMessage(WIDGET_MSG_KEY_LEFT);
}
if(BUTTON_PRESSED(RIGHT_BUTTON, ui8ButtonState, ui8ButtonChanged))
{
SendWidgetKeyMessage(WIDGET_MSG_KEY_RIGHT);
}
}
//
// Tell the OTG library code how much time has passed in milliseconds
// since the last call.
//
USBOTGMain(GetTickms());
//
// Call functions as needed to keep the host or device mode running.
//
if(g_iCurrentUSBMode == eUSBModeDevice)
{
USBSerialRun();
}
else if(g_iCurrentUSBMode == eUSBModeHost)
{
USBStickRun();
}
//
// If in the logging state, then call the logger run function. This
// keeps the data acquisition running.
//
if((g_iLoggerState == eSTATE_LOGGING) ||
(g_iLoggerState == eSTATE_VIEWING))
{
if(AcquireRun() && g_sConfigState.ui32SleepLogging)
{
//
// If sleep logging is enabled, then at this point we have
// stored the first data item, now save the state and start
// hibernation. Wait for the power to be cut.
//
SetSavedState(&g_sConfigState);
HibernateWakeSet(HIBERNATE_WAKE_PIN | HIBERNATE_WAKE_RTC);
HibernateRequest();
for(;;)
{
}
}
//
// If viewing instead of logging then request a repaint to keep
// the viewing window updated.
//
if(g_iLoggerState == eSTATE_VIEWING)
{
WidgetPaint(WIDGET_ROOT);
}
}
//
// If in the saving state, then save data from flash storage to
// USB stick.
//
if(g_iLoggerState == eSTATE_SAVING)
{
//
// Save data from flash to USB
//
FlashStoreSave();
//
// Return to idle state
//
g_iLoggerState = eSTATE_IDLE;
}
//
// If in the erasing state, then erase the data stored in flash.
//
if(g_iLoggerState == eSTATE_ERASING)
{
//
// Save data from flash to USB
//
FlashStoreErase();
//
// Return to idle state
//
g_iLoggerState = eSTATE_IDLE;
}
//
// If in the flash reporting state, then show the report of the amount
// of used and free flash memory.
//
if(g_iLoggerState == eSTATE_FREEFLASH)
{
//
// Report free flash space
//
FlashStoreReport();
//
// Return to idle state
//
g_iLoggerState = eSTATE_IDLE;
}
//
// If we are exiting the clock setting widget, that means that control
// needs to be given back to the menu system.
//
if(g_iLoggerState == eSTATE_CLOCKEXIT)
{
//
// Give the button event focus back to the menu system
//
g_ui32KeyFocusWidgetHandle = (uint32_t)&g_sMenuWidget;
//
// Send a button event to the menu widget that means the left
// key was pressed. This signals the menu widget to deactivate
// the current child widget (which was the clock setting wigdet).
// This will cause the menu widget to slide the clock set widget
// off the screen and resume control of the display.
//
SendWidgetKeyMessage(WIDGET_MSG_KEY_LEFT);
g_iLoggerState = eSTATE_IDLE;
}
//
// Process any new messages that are in the widget queue. This keeps
// the user interface running.
//
WidgetMessageQueueProcess();
}
}
//*****************************************************************************
//
// 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");
}
}
}
//*****************************************************************************
//
// This is the main loop that runs the application.
//
//*****************************************************************************
int
main(void)
{
uint8_t ui8ButtonsChanged, ui8Buttons;
uint32_t ui32SysClock;
//
// Set the clocking to run from the PLL at 120MHz
//
ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_25MHZ |
SYSCTL_CFG_VCO_480), 120000000);
//
// Configure the device pins.
//
PinoutSet();
//
// Configure the buttons driver.
//
ButtonsInit(ALL_BUTTONS);
//
// Initialize the display driver.
//
Kentec320x240x16_SSD2119Init(ui32SysClock);
//
// Initialize the graphics context.
//
GrContextInit(&g_sContext, &g_sKentec320x240x16_SSD2119);
//
// Draw the application frame.
//
FrameDraw(&g_sContext, "usb-dev-gamepad");
//
// Default status is disconnected.
//
DisplayStatus(&g_sContext, "Disconnected");
//
// Not configured initially.
//
g_iGamepadState = eStateNotConfigured;
//
// Initialize the USB stack for device mode.
//
USBStackModeSet(0, eUSBModeDevice, 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.
//
g_sReport.ui8Buttons = 0;
g_sReport.i8XPos = 0;
g_sReport.i8YPos = 0;
//
// Initialize the touch screen driver.
//
TouchScreenInit(ui32SysClock);
//
// Set the touch screen event handler.
//
TouchScreenCallbackSet(TSHandler);
//
// 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)
{
//
// See if the buttons updated.
//
ButtonsPoll(&ui8ButtonsChanged, &ui8Buttons);
g_sReport.ui8Buttons = 0;
//
// Set button 1 if up button pressed.
//
if(ui8Buttons & UP_BUTTON)
{
g_sReport.ui8Buttons |= 0x01;
}
//
// Set button 2 if down button pressed.
//
if(ui8Buttons & DOWN_BUTTON)
{
g_sReport.ui8Buttons |= 0x02;
}
//
// Set button 3 if select button pressed.
//
if(ui8Buttons & SELECT_BUTTON)
{
g_sReport.ui8Buttons |= 0x04;
}
if(ui8ButtonsChanged)
{
g_bUpdate = true;
}
//
// Send the report if there was an update.
//
if(g_bUpdate)
{
g_bUpdate = false;
USBDHIDGamepadSendReport(&g_sGamepadDevice, &g_sReport,
sizeof(g_sReport));
//
// Now sending data but protect this from an interrupt since
// it can change in interrupt context as well.
//
IntMasterDisable();
g_iGamepadState = eStateSending;
IntMasterEnable();
}
}
}
}
//*****************************************************************************
//
// This function handles updates due to the buttons.
//
// This function is called from the main loop each time the buttons need to
// be checked. If it detects an update it will schedule an transfer to the
// host.
//
// Returns Returns \b true on success or \b false if an error is detected.
//
//*****************************************************************************
tBoolean
ButtonHandler(void)
{
unsigned char ucButtons, ucChanged, ucRepeat;
unsigned long ulRetcode;
char cDeltaX, cDeltaY;
tBoolean bSuccess;
//
// Determine the state of the pushbuttons.
//
ucButtons = ButtonsPoll(&ucChanged, &ucRepeat);
//
// Update the display to show which buttons are currently pressed.
//
UpdateDisplay(ucButtons);
//
// If we are connected to the host and the select button changed state or
// we see a repeat message from any of the direction buttons, go ahead and
// send a mouse state change to the host.
//
if((ucChanged & SELECT_BUTTON) || (ucRepeat & ~SELECT_BUTTON))
{
//
// Assume no change in the position until we determine otherwise.
//
cDeltaX = 0;
cDeltaY = 0;
//
// Up button is held down
//
if(BUTTON_REPEAT(UP_BUTTON, ucRepeat))
{
cDeltaY = MOUSE_MOVE_DEC;
}
//
// Down button is held down.
//
if(BUTTON_REPEAT(DOWN_BUTTON, ucRepeat))
{
cDeltaY = MOUSE_MOVE_INC;
}
//
// Left button is held down.
//
if(BUTTON_REPEAT(LEFT_BUTTON, ucRepeat))
{
cDeltaX = MOUSE_MOVE_DEC;
}
//
// Right button is held down
//
if(BUTTON_REPEAT(RIGHT_BUTTON, ucRepeat))
{
cDeltaX = MOUSE_MOVE_INC;
}
//
// Tell the HID driver to send this new report for us. Note that a 0
// in ucButtons indicates that the relevant button is pressed so we
// set the MOUSE_REPORT_BUTTON_1 bit if SELECT_BUTTON is clear in
// ucButtons.
//
DEBUG_PRINT("Sending (0x%02x, 0x%02x), button %s.\n", cDeltaX,
cDeltaY, ((ucButtons & SELECT_BUTTON) ? "released" :
"pressed"));
g_eMouseState = MOUSE_STATE_SENDING;
ulRetcode = USBDHIDMouseStateChange((void *)&g_sMouseDevice, cDeltaX,
cDeltaY,
((ucButtons & SELECT_BUTTON) ? 0 :
MOUSE_REPORT_BUTTON_1));
//
// Did we schedule the report for transmission?
//
if(ulRetcode == MOUSE_SUCCESS)
{
//
// Wait for the host to acknowledge the transmission if all went
// well.
//
bSuccess = WaitForSendIdle(MAX_SEND_DELAY);
//
// Did we time out waiting for the packet to be sent?
//
if (!bSuccess)
{
//
// Yes - assume the host disconnected and go back to
// waiting for a new connection.
//
DEBUG_PRINT("Send timed out!\n");
g_bConnected = 0;
}
}
else
{
//
// An error was reported when trying to send the report. This may
// be due to host disconnection but could also be due to a clash
// between our attempt to send a report and the driver sending the
// last report in response to an idle timer timeout so we don't
// jump to the conclusion that we were disconnected in this case.
//
DEBUG_PRINT("Can't send report.\n");
bSuccess = false;
}
}
else
{
//
// There was no change in the state of the buttons so we have nothing
// to do.
//
bSuccess = true;
}
return(bSuccess);
}
int main(void) {
// Enable FPU for interrupt routines
// ROM_FPULazyStackingEnable();
// ROM_FPUEnable();
// Set clock to 80MHz
SysCtlClockSet(SYSCTL_SYSDIV_2_5 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ);
// Turn off LEDs
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_2|GPIO_PIN_3, 0);
// Setup buttons
ButtonsInit();
// Initialize the UART.
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
ROM_GPIOPinConfigure(GPIO_PA0_U0RX);
ROM_GPIOPinConfigure(GPIO_PA1_U0TX);
ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
UARTStdioInit(0);
// Setup servos and start the timer for them
setupServos();
uint16_t servoPosition = SERVO_MIN_PULSE;
// Continually check which button is pressed and move the servo position that direction
while(1) {
switch(ButtonsPoll(0, 0) & ALL_BUTTONS) {
case LEFT_BUTTON:
servoPosition -= 10;
if(servoPosition < SERVO_MIN_PULSE) {
servoPosition = SERVO_MIN_PULSE;
// Too far, blink red
ROM_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3, GPIO_PIN_1);
} else {
// Valid position, blink green
ROM_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3, GPIO_PIN_2);
}
break;
case RIGHT_BUTTON:
servoPosition += 10;
if(servoPosition > SERVO_MAX_PULSE) {
servoPosition = SERVO_MAX_PULSE;
// Too far, blink red
ROM_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3, GPIO_PIN_1);
} else {
// Valid position, blink blue
ROM_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3, GPIO_PIN_3);
}
break;
}
// Update servo positions
servoSet(servo, servoPosition);
servoSet(servo2, servoPosition);
// Wait .002s
SysCtlDelay((SysCtlClockGet() / 3) / 500);
// Turn off all LEDs
ROM_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3, 0);
}
}
//*****************************************************************************
//
// This is the main loop that runs the application.
//
//*****************************************************************************
int
main(void)
{
uint_fast32_t ui32LastTickCount;
bool bLastSuspend;
uint32_t ui32SysClock;
//
// Run from the PLL at 120 MHz.
//
ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
SYSCTL_OSC_MAIN | SYSCTL_USE_PLL |
SYSCTL_CFG_VCO_480), 120000000);
//
// Configure the device pins for this board.
//
PinoutSet(false, true);
//
// Initialize the buttons driver
//
ButtonsInit();
//
// Enable UART0
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
//
// Initialize the UART for console I/O.
//
UARTStdioConfig(0, 115200, ui32SysClock);
//
// 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(ui32SysClock / SYSTICKS_PER_SECOND);
ROM_SysTickIntEnable();
ROM_SysTickEnable();
//
// Initial Message
//
UARTprintf("\033[2J\033[H\n");
UARTprintf("******************************\n");
UARTprintf("* usb-dev-keyboard *\n");
UARTprintf("******************************\n");
//
// 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("\nWaiting For Host...\n");
//
// Wait here until USB device is connected to a host.
//
while(!g_bConnected) {
}
//
// Update the status.
//
UARTprintf("\nHost 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. Print state to terminal.
//
bLastSuspend = g_bSuspended;
if(bLastSuspend) {
UARTprintf("\nBus Suspended ... \n");
} else {
UARTprintf("\nHost Connected ... \n");
}
}
//
// See if the button was just pressed.
//
ui8Buttons = ButtonsPoll(&ui8ButtonsChanged, 0);
if(BUTTON_PRESSED(LEFT_BUTTON | RIGHT_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) {
}
}
}
}
//*****************************************************************************
//
// 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;
}
}
}
}
//*****************************************************************************
//
// The interrupt handler for the PB4 pin interrupt. When triggered, this will
// toggle the JTAG pins between JTAG and GPIO mode.
//
//*****************************************************************************
void
SysTickIntHandler(void)
{
uint8_t ui8Buttons;
uint8_t ui8ButtonsChanged;
//
// Grab the current, debounced state of the buttons.
//
ui8Buttons = ButtonsPoll(&ui8ButtonsChanged, 0);
//
// If the USR_SW1 button has been pressed, and was previously not pressed,
// start the process of changing the behavior of the JTAG pins.
//
if(BUTTON_PRESSED(USR_SW1, ui8Buttons, ui8ButtonsChanged))
{
//
// Toggle the pin mode.
//
g_ui32Mode ^= 1;
//
// See if the pins should be in JTAG or GPIO mode.
//
if(g_ui32Mode == 0)
{
//
// Change PC0-3 into hardware (i.e. JTAG) pins.
//
HWREG(GPIO_PORTC_BASE + GPIO_O_LOCK) = GPIO_LOCK_KEY;
HWREG(GPIO_PORTC_BASE + GPIO_O_CR) = 0x01;
HWREG(GPIO_PORTC_BASE + GPIO_O_AFSEL) |= 0x01;
HWREG(GPIO_PORTC_BASE + GPIO_O_LOCK) = GPIO_LOCK_KEY;
HWREG(GPIO_PORTC_BASE + GPIO_O_CR) = 0x02;
HWREG(GPIO_PORTC_BASE + GPIO_O_AFSEL) |= 0x02;
HWREG(GPIO_PORTC_BASE + GPIO_O_LOCK) = GPIO_LOCK_KEY;
HWREG(GPIO_PORTC_BASE + GPIO_O_CR) = 0x04;
HWREG(GPIO_PORTC_BASE + GPIO_O_AFSEL) |= 0x04;
HWREG(GPIO_PORTC_BASE + GPIO_O_LOCK) = GPIO_LOCK_KEY;
HWREG(GPIO_PORTC_BASE + GPIO_O_CR) = 0x08;
HWREG(GPIO_PORTC_BASE + GPIO_O_AFSEL) |= 0x08;
HWREG(GPIO_PORTC_BASE + GPIO_O_LOCK) = GPIO_LOCK_KEY;
HWREG(GPIO_PORTC_BASE + GPIO_O_CR) = 0x00;
HWREG(GPIO_PORTC_BASE + GPIO_O_LOCK) = 0;
//
// Turn on the LED to indicate that the pins are in JTAG mode.
//
ROM_GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_0 | GPIO_PIN_1,
GPIO_PIN_0);
}
else
{
//
// Change PC0-3 into GPIO inputs.
//
HWREG(GPIO_PORTC_BASE + GPIO_O_LOCK) = GPIO_LOCK_KEY;
HWREG(GPIO_PORTC_BASE + GPIO_O_CR) = 0x01;
HWREG(GPIO_PORTC_BASE + GPIO_O_AFSEL) &= 0xfe;
HWREG(GPIO_PORTC_BASE + GPIO_O_LOCK) = GPIO_LOCK_KEY;
HWREG(GPIO_PORTC_BASE + GPIO_O_CR) = 0x02;
HWREG(GPIO_PORTC_BASE + GPIO_O_AFSEL) &= 0xfd;
HWREG(GPIO_PORTC_BASE + GPIO_O_LOCK) = GPIO_LOCK_KEY;
HWREG(GPIO_PORTC_BASE + GPIO_O_CR) = 0x04;
HWREG(GPIO_PORTC_BASE + GPIO_O_AFSEL) &= 0xfb;
HWREG(GPIO_PORTC_BASE + GPIO_O_LOCK) = GPIO_LOCK_KEY;
HWREG(GPIO_PORTC_BASE + GPIO_O_CR) = 0x08;
HWREG(GPIO_PORTC_BASE + GPIO_O_AFSEL) &= 0xf7;
HWREG(GPIO_PORTC_BASE + GPIO_O_LOCK) = GPIO_LOCK_KEY;
HWREG(GPIO_PORTC_BASE + GPIO_O_CR) = 0x00;
HWREG(GPIO_PORTC_BASE + GPIO_O_LOCK) = 0;
ROM_GPIOPinTypeGPIOInput(GPIO_PORTC_BASE, (GPIO_PIN_0 | GPIO_PIN_1 |
GPIO_PIN_2 |
GPIO_PIN_3));
//
// Turn off the LED to indicate that the pins are in GPIO mode.
//
ROM_GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_0 | GPIO_PIN_1,
GPIO_PIN_1);
}
}
}
//*****************************************************************************
//
// This example demonstrates the use of the watchdog timer.
//
//*****************************************************************************
int
main(void)
{
int_fast32_t i32CenterX;
tRectangle sRect;
//
// 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 directly from the crystal.
//
ROM_SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_16MHZ);
//
// Initialize the display and buttons drivers.
//
CFAL96x64x16Init();
ButtonsInit();
//
// Initialize the graphics context and find the middle X coordinate.
//
GrContextInit(&g_sContext, &g_sCFAL96x64x16);
i32CenterX = GrContextDpyWidthGet(&g_sContext) / 2;
//
// 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, "watchdog", -1, i32CenterX, 4, 0);
//
// Show the state and offer some instructions to the user.
//
GrContextFontSet(&g_sContext, g_psFontFixed6x8);
GrStringDrawCentered(&g_sContext, "Feeding", -1, i32CenterX, 14, 1);
GrStringDrawCentered(&g_sContext, "Watchdog", -1, i32CenterX, 24, 1);
GrStringDrawCentered(&g_sContext, "Press", -1, i32CenterX, 36, 1);
GrStringDrawCentered(&g_sContext, "Select", -1, i32CenterX, 46, 1);
GrStringDrawCentered(&g_sContext, "to stop", -1, i32CenterX, 56, 1);
//
// Enable the peripherals used by this example.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_WDOG0);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
//
// Enable processor interrupts.
//
ROM_IntMasterEnable();
//
// Set GPIO PG2 as an output. This drives an LED on the board that will
// toggle when a watchdog interrupt is processed.
//
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTG_BASE, GPIO_PIN_2);
ROM_GPIOPinWrite(GPIO_PORTG_BASE, GPIO_PIN_2, 0);
//
// Enable the watchdog interrupt.
//
ROM_IntEnable(INT_WATCHDOG);
//
// Set the period of the watchdog timer.
//
ROM_WatchdogReloadSet(WATCHDOG0_BASE, ROM_SysCtlClockGet());
//
// Enable reset generation from the watchdog timer.
//
ROM_WatchdogResetEnable(WATCHDOG0_BASE);
//
// Enable the watchdog timer.
//
ROM_WatchdogEnable(WATCHDOG0_BASE);
//
// Loop forever while the LED winks as watchdog interrupts are handled.
//
while(1)
{
//
// Poll for the select button pressed
//
uint8_t ui8Buttons = ButtonsPoll(0, 0);
if(ui8Buttons & SELECT_BUTTON)
{
SelectButtonPressed();
while(1)
{
}
}
}
}
//*****************************************************************************
//
// This example demonstrates the use of the watchdog timer.
//
//*****************************************************************************
int
main(void)
{
//
// Set the clocking to run directly from the crystal at 120MHz.
//
g_ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
SYSCTL_OSC_MAIN |
SYSCTL_USE_PLL |
SYSCTL_CFG_VCO_480), 120000000);
//
// Initialize the buttons driver.
//
ButtonsInit();
//
// Enable the peripherals used by this example.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_WDOG0);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPION);
//
// Enable processor interrupts.
//
ROM_IntMasterEnable();
//
// Set GPIO PN0 as an output. This drives an LED on the board that will
// toggle when a watchdog interrupt is processed.
//
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTN_BASE, GPIO_PIN_0);
ROM_GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_0, 0);
//
// Enable the watchdog interrupt.
//
ROM_IntEnable(INT_WATCHDOG);
//
// Set the period of the watchdog timer to 1 second.
//
ROM_WatchdogReloadSet(WATCHDOG0_BASE, g_ui32SysClock);
//
// Enable reset generation from the watchdog timer.
//
ROM_WatchdogResetEnable(WATCHDOG0_BASE);
//
// Enable the watchdog timer.
//
ROM_WatchdogEnable(WATCHDOG0_BASE);
//
// Loop forever while the LED winks as watchdog interrupts are handled.
//
while(1)
{
//
// Poll for the select button pressed
//
uint8_t ui8Buttons = ButtonsPoll(0, 0);
if(ui8Buttons & USR_SW1)
{
SW1ButtonPressed();
while(1)
{
}
}
}
}
//*****************************************************************************
//
// This is interrupt handler for the systick interrupt.
//
// This function handles the interrupts generated by the system tick. These
// are used for button debouncing and updating the state of the buttons.
// The buttons are stored in a bitmask indicating which buttons have been
// release. If a button is pressed twice, only one press will be seen. There
// is no press and hold detection.
//
// \return None.
//
//*****************************************************************************
void
SysTickHandler(void)
{
unsigned char ucButtons;
unsigned char ucChanged;
unsigned char ucRepeat;
//
// Determine the state of the pushbuttons.
//
ucButtons = ButtonsPoll(&ucChanged, &ucRepeat);
//
// Up button has been released.
//
if(BUTTON_RELEASED(UP_BUTTON, ucButtons, ucChanged))
{
g_ulButtons |= BUTTON_UP_CLICK;
}
//
// Up button has been held.
//
if(BUTTON_REPEAT(UP_BUTTON, ucRepeat))
{
g_ulButtons |= BUTTON_UP_CLICK;
}
//
// Down button has been released.
//
if(BUTTON_RELEASED(DOWN_BUTTON, ucButtons, ucChanged))
{
g_ulButtons |= BUTTON_DOWN_CLICK;
}
//
// Down button has been held.
//
if(BUTTON_REPEAT(DOWN_BUTTON, ucRepeat))
{
g_ulButtons |= BUTTON_DOWN_CLICK;
}
//
// Left button has been released.
//
if(BUTTON_RELEASED(LEFT_BUTTON, ucButtons, ucChanged))
{
g_ulButtons |= BUTTON_LEFT_CLICK;
}
//
// Right button has been released.
//
if(BUTTON_RELEASED(RIGHT_BUTTON, ucButtons, ucChanged))
{
g_ulButtons |= BUTTON_RIGHT_CLICK;
}
//
// Select button has been released.
//
if(BUTTON_RELEASED(SELECT_BUTTON, ucButtons, ucChanged))
{
g_ulButtons |= BUTTON_SELECT_CLICK;
}
}
int main(void) {
unsigned char button_val;
unsigned char Delta;
unsigned char Rawstate;
//
// Setup the system clock to run at 80 Mhz from PLL with crystal reference
//
SysCtlClockSet(
SYSCTL_SYSDIV_5 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN
| SYSCTL_XTAL_16MHZ);
//
// Enable and configure the GPIO port for the LED operation.
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
GPIOPinTypeGPIOOutput(LED, RED_LED | BLUE_LED | GREEN_LED);
GPIOPinWrite(LED, RED_LED | BLUE_LED | GREEN_LED, 0x00);
Blink(GREEN_LED | BLUE_LED, 5, 50);
ButtonsInit();
UARTInit();
while (1) {
SysCtlDelay(100000);
button_val = ButtonsPoll(&Delta, &Rawstate);
if (BUTTON_PRESSED(LEFT_BUTTON,button_val,Delta)) {
if (SendAndCheck("AT", 1)) {
Blink(BLUE_LED, 1, 300);
} else {
Blink(RED_LED, 1, 300);
}
}
if (BUTTON_PRESSED(RIGHT_BUTTON,button_val,Delta)) {
break;
}
}
Blink(GREEN_LED, 1, 1000);
ADCInit();
InitSonar();
SimInit();
Blink(BLUE_LED, 1, 1000);
//
// Loop Forever
//
while (1) {
SysCtlDelay(100000);
button_val = ButtonsPoll(&Delta, &Rawstate);
if (BUTTON_PRESSED(LEFT_BUTTON,button_val,Delta)) {
GPIOPinWrite(LED, RED_LED | BLUE_LED | GREEN_LED, GREEN_LED);
max_distance = GetDistanceSonar();
GPIOPinWrite(LED, RED_LED | BLUE_LED | GREEN_LED, 0x00);
if (SendAndCheck("AT", 1)) {
Blink(BLUE_LED, 1, 300);
} else {
Blink(RED_LED, 1, 300);
}
}
if (BUTTON_PRESSED(RIGHT_BUTTON,button_val,Delta)) {
isRunning = !isRunning;
}
if (isRunning) {
tempC = GetTemperature();
if (tempC > 70) {
SendData(DATA_TEMP, tempC);
Blink(RED_LED, 3, 100);
}
distance = GetDistanceSonar();
percentage = (int) floor(
((max_distance - distance) * 100.0) / max_distance);
if ((percentage >= 0) && (percentage <= 100)
&& abs(percentage - oldPercentage) > 10) {
SendData(DATA_TRASH, percentage);
oldPercentage = percentage;
}
Blink(GREEN_LED, 1, 10);
}
}
}
//*****************************************************************************
//
// This task reads the buttons' state and passes this information to LEDTask.
//
//*****************************************************************************
static void
SwitchTask(void *pvParameters)
{
portTickType ui16LastTime;
uint32_t ui32SwitchDelay = 25;
uint8_t ui8CurButtonState, ui8PrevButtonState;
uint8_t ui8Message;
ui8CurButtonState = ui8PrevButtonState = 0;
//
// Get the current tick count.
//
ui16LastTime = xTaskGetTickCount();
//
// Loop forever.
//
while(1)
{
//
// Poll the debounced state of the buttons.
//
ui8CurButtonState = ButtonsPoll(0, 0);
//
// Check if previous debounced state is equal to the current state.
//
if(ui8CurButtonState != ui8PrevButtonState)
{
ui8PrevButtonState = ui8CurButtonState;
//
// Check to make sure the change in state is due to button press
// and not due to button release.
//
if((ui8CurButtonState & ALL_BUTTONS) != 0)
{
if((ui8CurButtonState & ALL_BUTTONS) == LEFT_BUTTON)
{
ui8Message = LEFT_BUTTON;
//
// Guard UART from concurrent access.
//
xSemaphoreTake(g_pUARTSemaphore, portMAX_DELAY);
UARTprintf("Left Button is pressed.\n");
xSemaphoreGive(g_pUARTSemaphore);
}
else if((ui8CurButtonState & ALL_BUTTONS) == RIGHT_BUTTON)
{
ui8Message = RIGHT_BUTTON;
//
// Guard UART from concurrent access.
//
xSemaphoreTake(g_pUARTSemaphore, portMAX_DELAY);
UARTprintf("Right Button is pressed.\n");
xSemaphoreGive(g_pUARTSemaphore);
}
//
// Pass the value of the button pressed to LEDTask.
//
if(xQueueSend(g_pLEDQueue, &ui8Message, portMAX_DELAY) !=
pdPASS)
{
//
// Error. The queue should never be full. If so print the
// error message on UART and wait for ever.
//
UARTprintf("\nQueue full. This should never happen.\n");
while(1)
{
}
}
}
}
//
// Wait for the required amount of time to check back.
//
vTaskDelayUntil(&ui16LastTime, ui32SwitchDelay / portTICK_RATE_MS);
}
}
//*****************************************************************************
//
// 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;
}
}
}
}
}
//*****************************************************************************
//
// A simple application demonstrating use of the boot loader,
//
//*****************************************************************************
int
main(void)
{
tRectangle sRect;
tContext sContext;
unsigned long ulSysClock;
//
// 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_XTAL_16MHZ |
SYSCTL_OSC_MAIN);
ulSysClock = ROM_SysCtlClockGet();
//
// Initialize the peripherals that each of the boot loader flavors
// supports. Since this example is intended for use with any of the
// boot loaders and we don't know which is actually in use, we cover all
// bases and initialize for serial, Ethernet and USB use here.
//
SetupForUART();
SetupForUSB();
//
// Initialize the buttons driver.
//
ButtonsInit();
//
// Initialize the display driver.
//
CFAL96x64x16Init();
//
// Initialize the graphics context.
//
GrContextInit(&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(&sContext) - 1;
sRect.sYMax = 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_pFontFixed6x8);
GrStringDrawCentered(&sContext, "boot-demo2", -1,
GrContextDpyWidthGet(&sContext) / 2, 4, 0);
GrStringDrawCentered(&sContext, "Press select", -1,
GrContextDpyWidthGet(&sContext) / 2, 20, false);
GrStringDrawCentered(&sContext, "button to", -1,
GrContextDpyWidthGet(&sContext) / 2, 30, false);
GrStringDrawCentered(&sContext, "update.", -1,
GrContextDpyWidthGet(&sContext) / 2, 40, false);
//
// Wait for select button to be pressed.
//
while ((ButtonsPoll(0, 0) & SELECT_BUTTON) == 0)
{
ROM_SysCtlDelay(ulSysClock / 1000);
}
GrStringDrawCentered(&sContext, " ", -1,
GrContextDpyWidthGet(&sContext) / 2, 20, true);
GrStringDrawCentered(&sContext, " Updating... ", -1,
GrContextDpyWidthGet(&sContext) / 2, 30, true);
GrStringDrawCentered(&sContext, " ", -1,
GrContextDpyWidthGet(&sContext) / 2, 40, true);
//
// Transfer control to the boot loader.
//
JumpToBootLoader();
//
// The previous function never returns but we need to stick in a return
// code here to keep the compiler from generating a warning.
//
return(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)
{
}
}
}
}
