EEM-465 Gömülü Sistemler

2022-2023 Güz Dönemi Ders 10

Analog Dijital Çevirici - ADC

#include "stm32f4xx.h"
static volatile double analog;
int main(){
	RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN;
	GPIOA->MODER |= GPIO_MODER_MODER1;
	
	RCC->APB2ENR |= RCC_APB2ENR_ADC1EN;
	ADC1->CR2 |= ADC_CR2_ADON;
	ADC1->CR2 |= ADC_CR2_CONT;
	ADC1->SMPR2 |= ADC_SMPR2_SMP1;
	ADC1->SQR3 |= ADC_SQR3_SQ1_0;
	ADC1->CR2 |= ADC_CR2_SWSTART;
	
	while(1){
		analog = (ADC1->DR / 4095.0) * 3.3;
		while(!(ADC1->SR & ADC_SR_EOC));
	}
}

#include "stm32f4xx.h"
static volatile double analog[2];
static volatile int i=0;
int main(){
	RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN;
	GPIOA->MODER |= GPIO_MODER_MODER1 | GPIO_MODER_MODER3;
	
	RCC->APB2ENR |= RCC_APB2ENR_ADC1EN;
	ADC1->CR2 |= ADC_CR2_ADON;
	ADC1->CR2 |= ADC_CR2_CONT;
	ADC1->CR2 |= ADC_CR2_EOCS;
	ADC1->CR1 |= ADC_CR1_SCAN;
	
	ADC1->SMPR2 |= ADC_SMPR2_SMP1;
	ADC1->SMPR2 |= ADC_SMPR2_SMP3;
	ADC1->SQR1 |= ADC_SQR1_L_0;
	
	ADC1->SQR3 |= ADC_SQR3_SQ1_1 | ADC_SQR3_SQ1_0;
	ADC1->SQR3 |= ADC_SQR3_SQ2_0;
	ADC1->CR2 |= ADC_CR2_SWSTART;
	
	while(1){
		analog[i++%2] = (ADC1->DR / 4095.0) * 3.3;
		while(!(ADC1->SR & ADC_SR_EOC));
	}
}