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167 lines
6.1 KiB
C
167 lines
6.1 KiB
C
/* Board Support Package (BSP) for the EK-TM4C123GXL board */
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#include "FreeRTOS.h" /* FreeRTOS API */
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#include "task.h" /* FreeRTOS task API */
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#include "semphr.h" /* FreeRTOS semaphore API */
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#include "bsp.h" /* Board Support Package */
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#include "TM4C123GH6PM.h" /* the TM4C MCU Peripheral Access Layer (TI) */
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/* on-board LEDs */
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#define LED_RED (1U << 1)
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#define LED_BLUE (1U << 2)
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#define LED_GREEN (1U << 3)
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/* on-board switch */
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#define BTN_SW1 (1U << 4)
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SemaphoreHandle_t SW1_sema;
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/* Function Prototype ======================================================*/
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void vApplicationTickHook(void);
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void vApplicationIdleHook(void);
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void vApplicationStackOverflowHook(TaskHandle_t xTask, char *pcTaskName);
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void vApplicationGetIdleTaskMemory(StaticTask_t **ppxIdleTaskTCBBuffer,
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StackType_t **ppxIdleTaskStackBuffer,
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uint32_t *pulIdleTaskStackSize);
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void vApplicationGetTimerTaskMemory(StaticTask_t **ppxTimerTaskTCBBuffer,
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StackType_t **ppxTimerTaskStackBuffer,
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uint32_t *pulTimerTaskStackSize);
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/* Hooks ===================================================================*/
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/* Application hooks used in this project ==================================*/
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/* NOTE: only the "FromISR" API variants are allowed in vApplicationTickHook*/
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void vApplicationTickHook(void) {
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}
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void GPIOPortF_IRQHandler(void) {
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if ((GPIOF_AHB->RIS & BTN_SW1) != 0U) { /* interrupt caused by SW1? */
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BaseType_t xHigherPriorityTaskWoken = pdFALSE;
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xSemaphoreGiveFromISR(SW1_sema, &xHigherPriorityTaskWoken);
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portYIELD_FROM_ISR(xHigherPriorityTaskWoken);
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}
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GPIOF_AHB->ICR = 0xFFU; /* clear interrupt sources */
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}
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void BSP_init(void) {
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SYSCTL->GPIOHBCTL |= (1U << 5); /* enable AHB for GPIOF */
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SYSCTL->RCGCGPIO |= (1U << 5); /* enable Run Mode for GPIOF */
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GPIOF_AHB->DIR |= (LED_RED | LED_BLUE | LED_GREEN);
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GPIOF_AHB->DEN |= (LED_RED | LED_BLUE | LED_GREEN);
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/* configure switch SW1 */
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GPIOF_AHB->DIR &= ~BTN_SW1; /* input */
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GPIOF_AHB->DEN |= BTN_SW1; /* digital enable */
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GPIOF_AHB->PUR |= BTN_SW1; /* pull-up resistor enable */
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/* GPIO interrupt setup for SW1 */
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GPIOF_AHB->IS &= ~BTN_SW1; /* edge detect for SW1 */
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GPIOF_AHB->IBE &= ~BTN_SW1; /* only one edge generate the interrupt */
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GPIOF_AHB->IEV &= ~BTN_SW1; /* a falling edge triggers the interrupt */
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GPIOF_AHB->IM |= BTN_SW1; /* enable GPIOF interrupt for SW1 */
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}
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void BSP_ledRedOn(void) {
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GPIOF_AHB->DATA_Bits[LED_RED] = LED_RED;
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}
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void BSP_ledRedOff(void) {
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GPIOF_AHB->DATA_Bits[LED_RED] = 0U;
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}
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void BSP_ledBlueOn(void) {
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GPIOF_AHB->DATA_Bits[LED_BLUE] = LED_BLUE;
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}
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void BSP_ledBlueOff(void) {
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GPIOF_AHB->DATA_Bits[LED_BLUE] = 0U;
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}
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void BSP_ledGreenOn(void) {
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GPIOF_AHB->DATA_Bits[LED_GREEN] = LED_GREEN;
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}
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void BSP_ledGreenOff(void) {
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GPIOF_AHB->DATA_Bits[LED_GREEN] = 0U;
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}
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/* callbacks ---------------------------------------------------------------*/
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void BSP_onStartup(void) {
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SystemCoreClockUpdate();
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SysTick_Config(SystemCoreClock / BSP_TICKS_PER_SEC);
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/* set the interrupt priorities of "kernel aware" interrupts */
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NVIC_SetPriority(SysTick_IRQn,
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(configMAX_SYSCALL_INTERRUPT_PRIORITY >> (8-__NVIC_PRIO_BITS)));
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NVIC_SetPriority(GPIOF_IRQn,
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(configMAX_SYSCALL_INTERRUPT_PRIORITY >> (8-__NVIC_PRIO_BITS)) + 1);
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/* enable IRQs in NVIC... */
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NVIC_EnableIRQ(GPIOF_IRQn);
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}
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/*..........................................................................*/
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void vApplicationIdleHook(void) {
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GPIOF_AHB->DATA_Bits[LED_RED] = LED_RED;
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#ifdef NDEBUG
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/* Put the CPU and peripherals to the low-power mode.
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* you might need to customize the clock management for your application,
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* see the datasheet for your particular Cortex-M3 MCU.
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*/
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GPIOF_AHB->DATA_Bits[LED_RED] = 0U;
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__WFI(); /* Wait-For-Interrupt */
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GPIOF_AHB->DATA_Bits[LED_RED] = LED_RED;
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#endif
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GPIOF_AHB->DATA_Bits[LED_RED] = 0U;
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}
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/*..........................................................................*/
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void vApplicationStackOverflowHook(TaskHandle_t xTask, char *pcTaskName) {
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(void)xTask;
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(void)pcTaskName;
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/* ERROR!!! */
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}
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/*..........................................................................*/
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/* configSUPPORT_STATIC_ALLOCATION is set to 1, so the application must
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* provide an implementation of vApplicationGetIdleTaskMemory() to provide
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* the memory that is used by the Idle task.
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*/
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void vApplicationGetIdleTaskMemory(StaticTask_t **ppxIdleTaskTCBBuffer,
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StackType_t **ppxIdleTaskStackBuffer,
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uint32_t *pulIdleTaskStackSize)
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{
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/* If the buffers to be provided to the Idle task are declared inside
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* this function then they must be declared static - otherwise they will
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* be allocated on the stack and so not exists after this function exits.
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*/
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static StaticTask_t xIdleTaskTCB;
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static StackType_t uxIdleTaskStack[configMINIMAL_STACK_SIZE];
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/* Pass out a pointer to the StaticTask_t structure in which the
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* Idle task's state will be stored.
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*/
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*ppxIdleTaskTCBBuffer = &xIdleTaskTCB;
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/* Pass out the array that will be used as the Idle task's stack. */
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*ppxIdleTaskStackBuffer = &uxIdleTaskStack[0];
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/* Pass out the size of the array pointed to by *ppxIdleTaskStackBuffer.
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* Note that, as the array is necessarily of type StackType_t,
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* configMINIMAL_STACK_SIZE is specified in words, not bytes.
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*/
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*pulIdleTaskStackSize = sizeof(uxIdleTaskStack) / sizeof(uxIdleTaskStack[0]);
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}
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//............................................................................
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_Noreturn void assert_failed(char const * const module, int const id);
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_Noreturn void assert_failed(char const * const module, int const id) {
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(void)module; // unused parameter
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(void)id; // unused parameter
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#ifndef NDEBUG
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// light up all LEDs
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GPIOF_AHB->DATA_Bits[LED_GREEN | LED_RED | LED_BLUE] = 0xFFU;
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// for debugging, hang on in an endless loop...
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for (;;) {
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}
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#endif
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NVIC_SystemReset();
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}
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