freeRTOS task not working

[monta]

Posted on July 07, 2015 at 18:51

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       15void 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);}

[Tesla DeLorean]

Posted on July 07, 2015 at 20:12

Please edit your post, and use the Format Code Block tool (Paintbrush [<>]), as it's currently unreadable.

[monta]

Posted on July 11, 2015 at 21:59

Hi there, thank you for replying, please check now and let me know. Thank you !!

[Tesla DeLorean]

Posted on July 12, 2015 at 04:10GPIOD->BSRRL = (1 << 13);  // Liable to just set the pinGPIOD->ODR ^= (1 << 13); // Toggle

[monta]

Posted on July 12, 2015 at 12:53

Still not working :\ ?? 

I'm suspecting the problem is hereret = xTaskCreate(''BlinkLedTask'', ''FPU'', configMINIMAL_STACK_SIZE, NULL, NULL, NULL);

[Tesla DeLorean]

Posted on July 12, 2015 at 19:54

Do you have a scope on the LED, because it's probably not going to blink at a visible rate without some delay in the loop.

Not much of a freeRTOS expert, do you have a breakpoint in the loop? How is this ''not working'' being determined? Does xCreateTask() return a failure code? What does it suggest is the problem?

[monta]

Posted on July 17, 2015 at 20:18

Indeed that was the problem. Thumbs up !