sysclock.cpp File Reference

Sysclock configuration. More...

#include "../includes/config.h"
#include "Arduino.h"

Go to the source code of this file.

Functions
void	SystemClock_Config (void)
	System Clock Configuration, for hardware v3 and later on. More...

Detailed Description

Sysclock configuration.

Author

Makers For Life

Copyright

Copyright (c) 2020 Makers For Life

Definition in file sysclock.cpp.

Function Documentation

SystemClock_Config()

void SystemClock_Config

(

void

)

System Clock Configuration, for hardware v3 and later on.

Note

SYSCLK = 100000000 Hz for STM32F411xE

Configure the main internal regulator output voltage

Initializes the CPU, AHB and APB busses clocks

Initializes the CPU, AHB and APB busses clocks

Definition at line 22 of file sysclock.cpp.

                                         {
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
 
    __HAL_RCC_PWR_CLK_ENABLE();
    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
    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 = 100;
    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_3) != HAL_OK) {
        Error_Handler();
    }
}