15)Sending DAC to ADC

#include<stm32f30x.h>

/*Generate a 1VOLT tension with the DAC and read the value with the ADC . For this program to work you'll have to connect through a jumper the ports PA2 and PA4*/

int result;

void setupDAC();
void setupADC();

int main()
{
 setupDAC();
 setupADC();
 
 DAC->DHR12R1 = 1000; //Writing the tension in the DHR12R1
 ADC1->CR |= ADC_CR_ADSTART; //Start the ADC
 while((ADC1->ISR & ADC_ISR_EOS) != ADC_ISR_EOS); //Wait the ADC to finish
 result = (ADC1->DR & ADC_DR_RDATA); //Getting the result
 
 ADC1->CR |= ADC_CR_ADDIS;
}

void setupDAC()
{
 RCC->AHBENR |= RCC_AHBENR_GPIOAEN; //GPIOA because we want to use PA4 DAC1_OUT1
 GPIOA->MODER |= GPIO_MODER_MODER4; //PA4 to analog mode
 RCC->APB1ENR |= RCC_APB1ENR_DACEN; //Enabling peripheral on APB1
 DAC->CR |= DAC_CR_EN1; //Enabling DAC  
}

void setupADC()
{
  RCC->AHBENR |= RCC_AHBENR_ADC12EN;
  RCC->CFGR2 &= 0xFFFFFEFF; //0xxxx: ADC12 clock disabled,ADC12 can use AHB clock
  
  
  //ADVREG enable sequence
  
  ADC1->CR &= 0xCFFFFFFF; //ADVREGEN from 10 to 00
  ADC1->CR |= (1<<28);
  for(int i = 0; i < 1000; i++); //Wait the ADC to startup.
  
  ADC1_2->CCR|=ADC12_CCR_CKMODE_0;

  
  //Calibration phase
  
  ADC1->CR &= 0xFFFFFFFE; //Ensuring ADEN = 0
  ADC1->CR &= 0xBFFFFFFF; //Single ended input
  ADC1->CR |= ADC_CR_ADCAL; //ADCAL = 1
  while((ADC1->CR & ADC_CR_ADCAL) == ADC_CR_ADCAL); //Wait for ADCAL = 0
    
  //Selecting of the channel and speed.
  
  ADC1->SMPR1 |= ADC_SMPR1_SMP3; //Channel 3 max. speed. Why channel 3 ? Because we want to abilitate PA2 -> Channel 3.
  ADC1->SQR1 |= 0x000000C0; //To enable channel 3 we need to write the number of channels we want to enable in the bits L[3:0]. We want 1 conversion, so we'll just leave it 0. Then, in SQ1 we'll have to write 3.
  
  //Enabling ADC
  
  ADC1->CR |= ADC_CR_ADEN;
  while((ADC1->ISR & ADC_ISR_ADRD) != ADC_ISR_ADRD);
}