EEM-465 Gömülü Sistemler

2022-2023 Güz Dönemi Ders 12

HSI clock kaynagını kullanma

#include "stm32f4xx.h"
int main(){
	RCC->AHB1ENR |= RCC_AHB1ENR_GPIOEEN;
	GPIOE->MODER |= GPIO_MODER_MODER3_0;
	
	RCC->CR |=  RCC_CR_HSEON;
	while(!(RCC->CR & RCC_CR_HSERDY));
	RCC->CFGR |= RCC_CFGR_SW_0;
	RCC->CR &= ~RCC_CR_HSION;
	
	SysTick->LOAD = 4000;
	SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk;
	while(1){
		GPIOE->ODR |= GPIO_ODR_OD3;
		while(!(SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk));
		GPIOE->ODR &= ~GPIO_ODR_OD3;
		while(!(SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk));
	}
	
}