void pio_init() { // Board Initialization start // // // The FPU should be enabled because some compilers will use floating- // point registers, even for non-floating-point code. If the FPU is not // enabled this will cause a fault. This also ensures that floating- // point operations could be added to this application and would work // correctly and use the hardware floating-point unit. Finally, lazy // stacking is enabled for interrupt handlers. This allows floating- // point instructions to be used within interrupt handlers, but at the // expense of extra stack usage. // FPUEnable(); FPULazyStackingEnable(); //Init the device with 16 MHz clock. initClk(); /* Configure the system peripheral bus that IRQ & EN pin are map to */ MAP_SysCtlPeripheralEnable( SYSCTL_PERIPH_IRQ_PORT); // // Disable all the interrupts before configuring the lines // MAP_GPIOPinIntDisable(SPI_GPIO_IRQ_BASE, 0xFF); // // Cofigure WLAN_IRQ pin as input // MAP_GPIOPinTypeGPIOInput(SPI_GPIO_IRQ_BASE, SPI_IRQ_PIN); GPIOPadConfigSet(SPI_GPIO_IRQ_BASE, SPI_IRQ_PIN, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU); // // Setup the GPIO interrupt for this pin // MAP_GPIOIntTypeSet(SPI_GPIO_IRQ_BASE, SPI_IRQ_PIN, GPIO_FALLING_EDGE); // // Configure WLAN chip // MAP_GPIOPinTypeGPIOOutput(SPI_GPIO_IRQ_BASE, SPI_EN_PIN); MAP_GPIODirModeSet( SPI_GPIO_IRQ_BASE, SPI_EN_PIN, GPIO_DIR_MODE_OUT ); MAP_GPIOPadConfigSet( SPI_GPIO_IRQ_BASE, SPI_EN_PIN, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPD ); MAP_GPIOPinWrite(SPI_GPIO_IRQ_BASE, SPI_EN_PIN, PIN_LOW); SysCtlDelay(600000); SysCtlDelay(600000); SysCtlDelay(600000); // // Disable WLAN CS with pull up Resistor // MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_SPI_PORT); MAP_GPIOPinTypeGPIOOutput(SPI_CS_PORT, SPI_CS_PIN); GPIOPadConfigSet(SPI_CS_PORT, SPI_CS_PIN, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU); MAP_GPIOPinWrite(SPI_CS_PORT, SPI_CS_PIN, PIN_HIGH); // // Enable interrupt for WLAN_IRQ pin // MAP_GPIOPinIntEnable(SPI_GPIO_IRQ_BASE, SPI_IRQ_PIN); // // Clear interrupt status // SpiCleanGPIOISR(); MAP_IntEnable(INT_GPIO_SPI); //init LED initLEDs(); }
/* * initialize tm4c */ void init_satellite() { FPUEnable(); FPULazyStackingEnable(); /* * init clock */ MAP_SysCtlClockSet(SYSCTL_SYSDIV_3 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ | SYSCTL_OSC_MAIN); //66.6..MHz MAP_IntMasterEnable(); /* * Enable peripherals */ MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF); //for LED indication MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA); //for UART MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0); MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB); //for IRQ and SW_EN MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE); //for SPI /* * configure */ MAP_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3); MAP_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3, SIGNAL_LOW); //off MAP_GPIOPinConfigure(GPIO_PA0_U0RX); MAP_GPIOPinConfigure(GPIO_PA1_U0TX); MAP_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1); UARTStdioConfig(UART_PORT, UART_BAUDRATE, SysCtlClockGet()); MAP_GPIOIntDisable(GPIO_PORTB_BASE, SIGNAL_HIGH); //interrupt disable MAP_GPIOPinTypeGPIOInput(GPIO_PORTB_BASE, GPIO_PIN_2); //IRQ as input MAP_GPIOPadConfigSet(GPIO_PORTB_BASE, GPIO_PIN_2, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU); MAP_GPIOIntTypeSet(GPIO_PORTB_BASE, GPIO_PIN_2, GPIO_FALLING_EDGE); //enable interrupt MAP_GPIOPinTypeGPIOOutput(GPIO_PORTB_BASE, GPIO_PIN_5); //sw enable MAP_GPIODirModeSet(GPIO_PORTB_BASE, GPIO_PIN_5, GPIO_DIR_MODE_OUT); MAP_GPIOPadConfigSet(GPIO_PORTB_BASE, GPIO_PIN_5, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPD); MAP_GPIOPinWrite(GPIO_PORTB_BASE, GPIO_PIN_5, SIGNAL_LOW); MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE); MAP_GPIOPinTypeGPIOOutput(GPIO_PORTE_BASE, GPIO_PIN_0); MAP_GPIOPadConfigSet(GPIO_PORTE_BASE, GPIO_PIN_0, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU); MAP_GPIOPinWrite(GPIO_PORTE_BASE, GPIO_PIN_0, SIGNAL_HIGH); //chip select MAP_GPIOIntEnable(GPIO_PORTB_BASE, GPIO_PIN_2); //enable interrupt for WLAN_IRQ pin SpiCleanGPIOISR(); //clear interrupt status MAP_IntEnable(INT_GPIOB); //spi init_worker(); setState(READY); }