试图闪烁 LED STM32Cube IDE STM32F411E-DISCO

Question

I'm trying to get started with STM32Cube IDE by blinking an LED on the board (PD15). I generated the starter C code by selecting the correct board, then added the following to the main loop:

  HAL_GPIO_TogglePin(GPIOD, GPIO_PIN_15);
  HAL_Delay(200);

I know the board works because I can run the example code "Demonstrations" which uses all of the LEDs, unfortunately the source isn't provided. I think the problem might be with the auto generated code so here is the full code:

#include "main.h"
#include "usb_host.h"

void SystemClock_Config(void);

int main(void)
{
  HAL_Init();

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  GPIO_InitStruct.Pin = GPIO_PIN_15;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    HAL_GPIO_WritePin(GPIOD, GPIO_PIN_15, GPIO_PIN_SET);
  }
}



/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

Answer 1

From the thread on the original post, my problem was that I was not initializing the GPIO ports properly, and the following line was missing from below the HAL_Init() line:

__HAL_RCC_GPIOD_CLK_ENABLE();

With the changes I am able to control the LEDs