STM32-Every: Compact STM32F411 Development Board

1/*
2 * STM32-Every Hardware Test Firmware (STM32F411CEU6)
3 * Configures HSE (25MHz) to 100MHz System Clock and toggles User LED
4 */
5#include "stm32f4xx_hal.h"
6
7#define USER_LED_PIN    GPIO_PIN_13
8#define USER_LED_PORT   GPIOC
9#define USER_BTN_PIN    GPIO_PIN_0
10#define USER_BTN_PORT   GPIOA
11
12void SystemClock_Config(void) {
13  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
14  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
15
16  __HAL_RCC_PWR_CLK_ENABLE();
17  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
18
19  // Enable HSE (25 MHz) and configure PLL for 100 MHz SYSCLK
20  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
21  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
22  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
23  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
24  RCC_OscInitStruct.PLL.PLLM = 25;
25  RCC_OscInitStruct.PLL.PLLN = 200;
26  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; // 100 MHz
27  RCC_OscInitStruct.PLL.PLLQ = 4;
28  HAL_RCC_OscConfig(&RCC_OscInitStruct);
29
30  // Set clock dividers for AHB, APB1, APB2
31  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
32                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
33  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
34  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
35  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
36  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
37  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3);
38}
39
40int main(void) {
41  HAL_Init();
42  SystemClock_Config();
43
44  __HAL_RCC_GPIOC_CLK_ENABLE();
45  GPIO_InitTypeDef GPIO_InitStruct = {0};
46  GPIO_InitStruct.Pin = USER_LED_PIN;
47  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
48  GPIO_InitStruct.Pull = GPIO_NOPULL;
49  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
50  HAL_GPIO_Init(USER_LED_PORT, &GPIO_InitStruct);
51
52  while (1) {
53    HAL_GPIO_TogglePin(USER_LED_PORT, USER_LED_PIN); // Blink PC13
54    HAL_Delay(500);
55  }
56}