You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
102 lines
3.4 KiB
C
102 lines
3.4 KiB
C
/* Board Support Package (BSP) for the STM32 NUCLEO-C031C6 board */
|
|
#include <stdint.h> /* Standard integers. WG14/N843 C99 Standard */
|
|
|
|
#include "bsp.h"
|
|
#include "stm32c0xx.h" // CMSIS-compliant header file for the MCU used
|
|
/* add other drivers if necessary... */
|
|
|
|
// Local-scope defines -----------------------------------------------------
|
|
// LED pins available on the board (just one user LED LD4--Green on PA.5)
|
|
#define LD4_PIN 5U
|
|
|
|
// external LED to be inserted between GND (short leg) and
|
|
// D12 (longer leg) on the CN9 connector
|
|
#define LD5_PIN 6U
|
|
|
|
// Button pins available on the board (just one user Button B1 on PC.13)
|
|
#define B1_PIN 13U
|
|
|
|
uint32_t volatile ready_set;
|
|
|
|
/* ISRs ===================================================================*/
|
|
void EXTI4_15_IRQHandler(void) {
|
|
uint32_t pins = EXTI->FPR1;
|
|
if (pins & (1U << B1_PIN)) {
|
|
EXTI->FPR1 = (1U << B1_PIN); // clear the interrupt source
|
|
ready_set |= ISR_1; // activate task-1
|
|
}
|
|
}
|
|
|
|
/* BSP functions ===========================================================*/
|
|
void BSP_init(void) {
|
|
// enable GPIOA clock port for the LED LD4
|
|
RCC->IOPENR |= (1U << 0U);
|
|
|
|
// NUCLEO-C031C6 board has LED LD4 on GPIOA pin LD4_PIN
|
|
// and external LED LD5 on GPIO LD5_PIN
|
|
// set the LED pins as push-pull output, no pull-up, pull-down
|
|
GPIOA->MODER &= ~((3U << 2U*LD4_PIN) | (3U << 2U*LD5_PIN));
|
|
GPIOA->MODER |= ((1U << 2U*LD4_PIN) | (1U << 2U*LD5_PIN));
|
|
GPIOA->OTYPER &= ~((1U << LD4_PIN) | (1U << LD5_PIN));
|
|
GPIOA->OSPEEDR &= ~((3U << 2U*LD4_PIN) | (3U << 2U*LD5_PIN));
|
|
GPIOA->OSPEEDR |= ((1U << 2U*LD4_PIN) | (1U << 2U*LD5_PIN));
|
|
GPIOA->PUPDR &= ~((3U << 2U*LD4_PIN) | (3U << 2U*LD5_PIN));
|
|
|
|
// enable GPIOC clock port for the Button B1
|
|
RCC->IOPENR |= (1U << 2U);
|
|
|
|
// configure Button B1 pin on GPIOC as input, no pull-up, pull-down
|
|
GPIOC->MODER &= ~(3U << 2U*B1_PIN); // pin mode
|
|
GPIOC->PUPDR &= ~(3U << 2U*B1_PIN);
|
|
|
|
// configure EXTI line for interrupt on Button B1
|
|
EXTI->EMR1 &= ~(1U << B1_PIN); // disable event for B1
|
|
EXTI->IMR1 |= (1U << B1_PIN); // enable EXIT line for B1
|
|
EXTI->RTSR1 &= ~(1U << B1_PIN); // disable raising edge trigger
|
|
EXTI->FTSR1 |= (1U << B1_PIN); // enable falling edge trigger
|
|
EXTI->EXTICR[3] = (EXTI->EXTICR[3] & (~(7U << 8U))) | (2U << 8U);
|
|
|
|
// enable the EXIT IRQ
|
|
NVIC_EnableIRQ(EXTI4_15_IRQn);
|
|
}
|
|
|
|
void BSP_deployAirbag(void) {
|
|
GPIOA->BSRR = (1U << LD4_PIN); // turn LD4 on
|
|
}
|
|
|
|
void BSP_engageABS(void) {
|
|
GPIOA->BSRR = (1U << LD5_PIN); // turn LD5 on
|
|
}
|
|
|
|
uint32_t goToSleepCtr = 0;
|
|
void BSP_goToSleep() {
|
|
++goToSleepCtr;
|
|
// disable clock to the unused peripherals
|
|
// setup the desired sleep mode
|
|
__WFI(); // wait for interrupt; EXECUTION STOPS!
|
|
// enable clock to the used peripherals
|
|
__enable_irq(); // enable interrupts with PRIMASK
|
|
}
|
|
|
|
void BSP_intDisable(void) {
|
|
__disable_irq();
|
|
}
|
|
|
|
void BSP_intEnable(void) {
|
|
__enable_irq();
|
|
}
|
|
|
|
//............................................................................
|
|
_Noreturn void assert_failed(char const * const module, int const id) {
|
|
(void)module; // unused parameter
|
|
(void)id; // unused parameter
|
|
#ifndef NDEBUG
|
|
// turn LD4 and LD5 on
|
|
GPIOA->BSRR = ((1U << LD4_PIN) | (1U << LD5_PIN));
|
|
// for debugging, hang on in an endless loop...
|
|
for (;;) {
|
|
}
|
|
#endif
|
|
NVIC_SystemReset();
|
|
}
|