main2.c

#include "stm32f446xx.h"
#include "delay.h"
#include <stdio.h>
#include "system.h"
#include "usart.h"
#include <lcd.h>
int Result[1024], Ptr = 0;
char buffer1[20];
char buffer2[20];
	
int main (void) {
SystemInit();

SysTick_Config(180000000/1000);

RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN;
	
GPIOA->MODER |= GPIO_MODER_MODER0|GPIO_MODER_MODER1_0|GPIO_MODER_MODER4|GPIO_MODER_MODER5; // PA2, PA2, PA4, PA5 analog mode

RCC->APB1ENR |=RCC_APB1ENR_DACEN;
DAC->CR |= DAC_CR_EN1|DAC_CR_EN2;
RCC->APB2ENR |= RCC_APB2ENR_ADC1EN|RCC_APB2ENR_ADC2EN;
ADC->CCR |= ADC_CCR_MULTI_1|ADC_CCR_MULTI_2;
ADC1->CR2 |= ADC_CR2_EXTEN_0;
ADC1->CR2 |= ADC_CR2_EXTSEL_1|ADC_CR2_EXTSEL_2;
ADC1->CR1 |= ADC_CR1_EOCIE;
//ADC1->SQR3 |= ADC_SQR3_SQ1_1;
//ADC1->SQR3 |= ADC_SQR3_SQ1_0;


ADC1->CR2 |= ADC_CR2_ADON;
ADC2->CR2 |= ADC_CR2_ADON;

NVIC_EnableIRQ(ADC_IRQn);	
	//USART1_init();

RCC->APB1ENR |= RCC_APB1ENR_TIM2EN;
TIM2->ARR =900;

TIM2->CR2 |= TIM_CR2_MMS_1;
TIM2->CR1 |= TIM_CR1_CEN;

//LCD_init();
//LCD_clear();



while(1){



}
	}

void ADC_IRQHandler(void)
{ // if UIF flag is set

GPIOA->ODR |= GPIO_ODR_ODR_1; // PE08 up
Ptr = (Ptr + 1) & 1023; // Increment pointer and limit its value
Result[Ptr] = ADC1->DR; // save ADC in circular buffer & clear EOC flag

DAC->DHR12R1 = Result[Ptr]; // pass current buffer -> DAC
DAC->DHR12R2 = Result[(Ptr - 100) & 1023]; // pass past buffer -> DAC
GPIOA->ODR &= ~GPIO_ODR_ODR_1;
//GPIOE->ODR &= ~0x0100; // PE08 down
;
};