freeRTOS Task Not Working

[Montassar Ghanmy]

Hello there, I wrote this simple code to test freeRTOS on my stm32f4 discovery , the code compiles nicely and give no errors but BlinkLedTask does not Blink the led on the board.

#include <stm32f4xx.h>
#include <misc.h>			 
#include <stm32f4xx_rcc.h>
#include <stm32f4xx_usart.h> 
#include <stm32f4xx_gpio.h>
#include "FreeRTOS.h"
#include "task.h"
#include <math.h>
#include <misc.h>

#define LED_GREEN      12
#define LED_ORANGE     13
#define LED_RED        14
#define LED_BLUE       15


void init_LED();

void BlinkLedTask(void);

int main(void) {
  uint8_t ret;

  SystemInit();
  //NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);

  init_LED();
  // Create a task
  ret = xTaskCreate("BlinkLedTask", "FPU", configMINIMAL_STACK_SIZE, NULL, NULL, NULL);

  if (ret == pdTRUE) {
	  GPIOD->BSRRL = (1 << 12);
    vTaskStartScheduler();  // should never return
  } else {
	  GPIOD->BSRRL = (1 << 14);
    // --TODO blink some LEDs to indicate fatal system error
  }

  for (;;);
}

void vApplicationTickHook(void) {
}

void vApplicationMallocFailedHook(void) {
  taskDISABLE_INTERRUPTS();
  for(;;);
}

void vApplicationIdleHook(void) {
}

void vApplicationStackOverflowHook(xTaskHandle pxTask, signed char *pcTaskName) {
  (void) pcTaskName;
  (void) pxTask;
  taskDISABLE_INTERRUPTS();
  for(;;);
}
void BlinkLedTask(void)
   {
       for( ;; )
       {
    	   GPIOD->BSRRL = (1 << 13);
       }

       vTaskDelete( NULL );
   }

void init_LED()
{
	int pin = LED_GREEN;
	//
	// Initialise the Clock.
	RCC->AHB1ENR |= RCC_AHB1Periph_GPIOD;
	//
	//
	GPIO_InitTypeDef GPIO_InitStructure;

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
	GPIO_Init(GPIOD, &GPIO_InitStructure);
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
	GPIO_Init(GPIOD, &GPIO_InitStructure);
}

Please let me know if I'm doing anything wrong ??
PS : The green LED, as written in the code, blinks to show that freeRTOS runs with no problem.

 

[RichardBarry]

Everything related to FreeRTOS in your post looks ok. Have you tested all the LEDs outside of a FreeRTOS app to ensure you have the start up code, linker script, etc. correct? For example, have you tested the LEDs from main() before you call vTaskStartScheduler()?

I don't think its related to your existing problem, because you are not running interrupts, but you will need the call to NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);, which you currently have commented out.

You don't say which STM32 part or which compiler you are using, but perhaps there is something here you could use as a base? https://www.freertos.org/a00090.html#ST If not then the Atollic tools come with examples for most STM32 parts and boards, albeit rather basic example they will at least get you started.

I don't understand your comment about BlinkLedTask not blinking on the board, but that the green LED does blink...