`gpio-led-blink.ino`

Seeed Studio XIAO STM32C5 · File : gpio-led-blink.ino · Language : C · Use case : Faire clignoter la LED embarquée pour vérifier le fonctionnement de base du GPIO.

Minimalist example to toggle the user LED using the STM32 HAL.

Uses STM32CubeIDE. Configures the system clock to 144 MHz via PLL fed by the 48 MHz HSE crystal. Pin PC13 is set as push-pull output. Verify the LED connection on your XIAO schematic.

gpio-led-blink.ino

#include "stm32c5xx_hal.h"

void SystemClock_Config(void);
void MX_GPIO_Init(void);

int main(void) {
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();

  while (1) {
    HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_13); // Pin LED typique XIAO
    HAL_Delay(500);
  }
}

void MX_GPIO_Init(void) {
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  __HAL_RCC_GPIOC_CLK_ENABLE();
  GPIO_InitStruct.Pin = GPIO_PIN_13;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
}

void SystemClock_Config(void) {
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 4;
  RCC_OscInitStruct.PLL.PLLN = 144;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { Error_Handler(); }

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) { Error_Handler(); }
}

void Error_Handler(void) { while(1) {} }

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