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128 lines
3.8 KiB
C
128 lines
3.8 KiB
C
/* Board Support Package (BSP) for the NUCLEO-C031C6 board */
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#include "qpc.h" // for the QXK kernel (part of QP/C)
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#include "bsp.h"
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#include "stm32c0xx.h" /* CMSIS-compliant header file for the MCU used */
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/* add other drivers if necessary... */
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// LED marked "LD4" (PA.5) on the NUCLEO-C031C6 board
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#define LD4_PIN 5U
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// external LED to be inserted between GND (short leg) and
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// D12 (longer leg) on the CN9 connector
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#define LD5_PIN 6U
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// Button B1 (PC.13) on the NUCLEO-C031C6 board
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#define B1_PIN 13U
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void SysTick_Handler(void) {
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QXK_ISR_ENTRY(); /* inform QXK about entering an ISR */
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QF_TICK_X(0U, (void *)0); /* process time events for rate 0 */
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QXK_ISR_EXIT(); /* inform QXK about exiting an ISR */
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}
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void EXTI4_15_IRQHandler(void); // prototype
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void EXTI4_15_IRQHandler(void) {
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QXK_ISR_ENTRY(); /* inform QXK about entering an ISR */
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/* falling edge? */
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if ((EXTI->FPR1 & (1U << B1_PIN)) != 0U) {
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EXTI->FPR1 = (1U << B1_PIN); /* clear interrupt */
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QXSemaphore_signal(&SW1_sema);
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}
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QXK_ISR_EXIT(); /* inform QXK about exiting an ISR */
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}
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void BSP_init(void) {
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// enable GPIOA clock port for the LEDs
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RCC->IOPENR |= (1U << 0U);
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// NUCLEO-C031C6 board has LED LD4 on GPIOA pin LD4_PIN
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// and external LED LD5 on GPIO LD5_PIN
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// set the LED pins as push-pull output, no pull-up, pull-down
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GPIOA->MODER &= ~((3U << 2U*LD4_PIN) | (3U << 2U*LD5_PIN));
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GPIOA->MODER |= ((1U << 2U*LD4_PIN) | (1U << 2U*LD5_PIN));
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GPIOA->OTYPER &= ~((1U << LD4_PIN) | (1U << LD5_PIN));
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GPIOA->OSPEEDR &= ~((3U << 2U*LD4_PIN) | (3U << 2U*LD5_PIN));
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GPIOA->OSPEEDR |= ((1U << 2U*LD4_PIN) | (1U << 2U*LD5_PIN));
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GPIOA->PUPDR &= ~((3U << 2U*LD4_PIN) | (3U << 2U*LD5_PIN));
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// enable GPIOC clock port for the Button B1
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RCC->IOPENR |= (1U << 2U);
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// configure Button B1 (PC.13) pins as input, no pull-up, pull-down
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GPIOC->MODER &= ~(3U << 2*B1_PIN);
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GPIOC->OSPEEDR &= ~(3U << 2*B1_PIN);
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GPIOC->OSPEEDR |= (1U << 2*B1_PIN);
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GPIOC->PUPDR &= ~(3U << 2*B1_PIN);
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// configure Button B1 interrupt as falling edge
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EXTI->EMR1 &= ~(1U << B1_PIN);
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EXTI->IMR1 |= (1U << B1_PIN);
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EXTI->RTSR1 &= ~(1U << B1_PIN);
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EXTI->FTSR1 |= (1U << B1_PIN);
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EXTI->EXTICR[3] &= ~(7U << 8); // EXTI port C line 13
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EXTI->EXTICR[3] |= (2U << 8); // EXTI port C line 13
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}
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void BSP_ledRedOn(void) {
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/* no red LED on board */
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}
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void BSP_ledRedOff(void) {
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/* no red LED on board */
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}
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void BSP_ledBlueOn(void) {
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/* no blue LED on board */
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}
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void BSP_ledBlueOff(void) {
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/* no blue LED on board */
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}
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void BSP_ledGreenOn(void) {
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GPIOA->BSRR = (1U << LD4_PIN); /* turn LED on */
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}
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void BSP_ledGreenOff(void) {
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GPIOA->BSRR = (1U << (LD4_PIN + 16U)); /* turn LED off */
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}
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/* callbacks ---------------------------------------------------------------*/
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void QF_onStartup(void) {
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SystemCoreClockUpdate();
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SysTick_Config(SystemCoreClock / BSP_TICKS_PER_SEC);
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/* set the SysTick interrupt priority (highest) */
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NVIC_SetPriority(SysTick_IRQn, 0U);
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NVIC_SetPriority(EXTI4_15_IRQn, 0U);
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/* enable interrupts */
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NVIC_EnableIRQ(EXTI4_15_IRQn);
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}
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/*..........................................................................*/
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void QF_onCleanup(void) {
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}
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/*..........................................................................*/
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void QXK_onIdle(void) {
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#ifdef NDBEBUG
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__WFI(); /* stop the CPU and Wait for Interrupt */
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#endif
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}
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//............................................................................
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void Q_onAssert(char const *module, int id) {
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/* TBD: damage control */
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(void)module; /* avoid the "unused parameter" compiler warning */
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(void)id; /* avoid the "unused parameter" compiler warning */
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NVIC_SystemReset();
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}
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void assert_failed(char const *module, int id) {
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Q_onAssert(module, id);
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}
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