EEM-465 Gömülü Sistemler

2022-2023 Güz Dönemi Ders 9

Genel Amaçlı Zamanlayıcılar

PWM sinyali üretme

#include "stm32f4xx.h"
int main(){
  RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN |
                  RCC_AHB1ENR_GPIOCEN;
  RCC->APB1ENR |= RCC_APB1ENR_TIM3EN;
  
  GPIOA->MODER |= GPIO_MODER_MODER7_1;
  GPIOC->MODER |= GPIO_MODER_MODER8_1;
  
  GPIOA->AFR[0] |= GPIO_AFRL_AFSEL7_1;
  GPIOC->AFR[1] |= GPIO_AFRH_AFSEL8_1;
  
  TIM3->PSC=15;
  TIM3->ARR=1000;
  TIM3->CCR2=300;
  TIM3->CCR3=600;
  
  TIM3->CCMR1 |= TIM_CCMR1_OC2M_2 | TIM_CCMR1_OC2M_1;
  TIM3->CCMR2 |= TIM_CCMR2_OC3M_2 | TIM_CCMR2_OC3M_1;
  TIM3->CCER |= TIM_CCER_CC2E | TIM_CCER_CC3E;
  TIM3->CR1 |= TIM_CR1_CEN;
  
  while(1);
}