基于HAL库的STM32H7工程开发->系统时钟设置-点亮LED灯

 1 #include "bsp_SystemClockConfig.h"
 2 
 3 void SystemClock_Config(void)
 4 {
 5   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
 6   RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
 7 
 8   /** Supply configuration update enable
 9   */
10   HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
11   /** Configure the main internal regulator output voltage
12   */
13   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE0);
14 
15   while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
16   /** Initializes the RCC Oscillators according to the specified parameters
17   * in the RCC_OscInitTypeDef structure.PLL倍频时钟系数，以及系统时钟源的选择，和PLL时钟源的选择
18   */
19   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
20   RCC_OscInitStruct.HSEState = RCC_HSE_ON;
21   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
22   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
23   RCC_OscInitStruct.PLL.PLLM = 5;
24   RCC_OscInitStruct.PLL.PLLN = 192;
25   RCC_OscInitStruct.PLL.PLLP = 2;
26   RCC_OscInitStruct.PLL.PLLQ = 2;
27   RCC_OscInitStruct.PLL.PLLR = 2;
28   RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_2;
29   RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
30   RCC_OscInitStruct.PLL.PLLFRACN = 0;
31   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
32   {
33     
34   }
35   /** Initializes the CPU, AHB and APB buses clocks 各总线时钟分频因子
36   */
37   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
38                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
39                               |RCC_CLOCKTYPE_D3PCLK1|RCC_CLOCKTYPE_D1PCLK1;
40   RCC_ClkInitStruct.SYSCLKSource   = RCC_SYSCLKSOURCE_PLLCLK;
41   RCC_ClkInitStruct.SYSCLKDivider  = RCC_SYSCLK_DIV1;
42   RCC_ClkInitStruct.AHBCLKDivider  = RCC_HCLK_DIV2;
43   RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
44   RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
45   RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
46   RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;
47 
48   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
49   {
50     
51   }
52 }

 1 #ifndef __BSP_SYSTEMCLOCKCONFIG_H
 2 #define __BSP_SYSTEMCLOCKCONFIG_H
 3 #ifdef __cplusplus
 4 extern "C" {
 5 #endif
 6 #include "stm32h7xx_hal.h"
 7 
 8 
 9 
10 
11 
12 
13 
14 
15 void SystemClock_Config(void);
16 
17 #ifdef __cplusplus
18 }
19 #endif
20 
21 #endif /* __BSP_SYSTEMCLOCKCONFIG_H */

 1 #include "bsp_led.h"
 2 
 3 void User_LED_Init(void)
 4 {
 5     GPIO_InitTypeDef GPIO_InitStruct = {0};
 6     
 7     /* 使能GPIO时钟 */
 8     __HAL_RCC_GPIOB_CLK_ENABLE();
 9     
10     /*设置初始化后的引脚状态 */
11   HAL_GPIO_WritePin(LED_R_GPIO_Port, LED_R_Pin, GPIO_PIN_RESET);
12     
13     /*配置GPIO引脚结构体参数 */
14   GPIO_InitStruct.Pin   = LED_R_Pin;
15   GPIO_InitStruct.Mode  = GPIO_MODE_OUTPUT_PP;
16   GPIO_InitStruct.Pull  = GPIO_NOPULL;
17   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
18     
19   HAL_GPIO_Init(LED_R_GPIO_Port, &GPIO_InitStruct);
20 }

 1 #ifndef __BSP_LED_H
 2 #define __BSP_LED_H
 3 #ifdef __cplusplus
 4 extern "C" {
 5 #endif
 6 #include "stm32h7xx_hal.h"
 7 
 8 
 9 #define LED_R_Pin        GPIO_PIN_0
10 #define LED_R_GPIO_Port  GPIOB
11 
12 void User_LED_Init(void);
13 
14 
15 
16 
17 
18 #ifdef __cplusplus
19 }
20 #endif
21 
22 #endif /* __BSP_LED_H */

 1 #include "main.h"
 2 #include "bsp_SystemClockConfig.h"
 3 #include "bsp_led.h"
 4 
 5 int main(void)
 6 {
 7     //复位所有外设，并设置中断优先组，使能系统时钟
 8     HAL_Init();
 9     //配置系统时钟源为外部时钟源
10     SystemClock_Config();
11     MX_GPIO_Init();
12     //板级外设初始化
13     User_LED_Init();
14     while(1)
15     {
16         HAL_GPIO_TogglePin(LED_R_GPIO_Port,LED_R_Pin);
17         HAL_Delay(500);
18     }
19 }
20 void MX_GPIO_Init(void)
21 {
22   /* GPIO Ports Clock Enable 外部时钟和调试端口要用到的GPIO*/
23   __HAL_RCC_GPIOA_CLK_ENABLE();
24   __HAL_RCC_GPIOB_CLK_ENABLE();
25   __HAL_RCC_GPIOC_CLK_ENABLE();
26   __HAL_RCC_GPIOH_CLK_ENABLE();
27 }
28 void SysTick_Handler(void)
29 {
30   HAL_IncTick();
31 }