EEM-465 Gömülü Sistemler

2022-2023 Güz Dönemi Ders 5

stm32f407xx.h başlık dosyasındaki tanımları kullanarak programlama

LED yakma söndürme

#include "stm32f4xx.h"
int main(){
  volatile int i;
  RCC->AHB1ENR |= RCC_AHB1ENR_GPIODEN;
  GPIOD->MODER |= GPIO_MODER_MODER15_0;
  while(1){
    GPIOD->ODR |= GPIO_ODR_OD15;
    for(i=0;i<1000000;i++);
    GPIOD->ODR &= ~GPIO_ODR_OD15;
    for(i=0;i<1000000;i++);
  }
}

4 LEDi yakma söndürme

#include "stm32f4xx.h"
int main(){
  volatile int i;
  RCC->AHB1ENR |= RCC_AHB1ENR_GPIODEN;
  GPIOD->MODER |= GPIO_MODER_MODER12_0 | GPIO_MODER_MODER13_0 |
    GPIO_MODER_MODER14_0 | GPIO_MODER_MODER15_0;
  while(1){
    GPIOD->ODR |= GPIO_ODR_OD12 |GPIO_ODR_OD13 |
      GPIO_ODR_OD14 |GPIO_ODR_OD15 ;
    for(i=0;i<1000000;i++);
    GPIOD->ODR &= ~(GPIO_ODR_OD12 |GPIO_ODR_OD13 |
      GPIO_ODR_OD14 |GPIO_ODR_OD15) ;
    for(i=0;i<1000000;i++);
  }
}

Buton kontrollü 4 LEDi yakma söndürme

#include "stm32f4xx.h"
int main(){
  volatile int i;
  RCC->AHB1ENR |= RCC_AHB1ENR_GPIODEN | RCC_AHB1ENR_GPIOAEN;
  
  GPIOD->MODER |= GPIO_MODER_MODER12_0 | GPIO_MODER_MODER13_0 |
    GPIO_MODER_MODER14_0 | GPIO_MODER_MODER15_0;

  //A portunun 0.pininin modu hali hazirda input olmasina ragmen
  //islemin nasil yapildiginin gosterilmesi icin modunu ayarlayalim.
  GPIOA->MODER &= ~GPIO_MODER_MODER0;
  while(1){
    if(GPIOA->IDR & GPIO_IDR_ID0){
      GPIOD->ODR |= GPIO_ODR_OD12 |GPIO_ODR_OD13 |
        GPIO_ODR_OD14 |GPIO_ODR_OD15 ;
      for(i=0;i<1000000;i++);
      GPIOD->ODR &= ~(GPIO_ODR_OD12 |GPIO_ODR_OD13 |
        GPIO_ODR_OD14 |GPIO_ODR_OD15) ;
      for(i=0;i<1000000;i++);
    }
  }
}