Stm32f0 Discovery Board ADC Kullanımı

Arkdaşlar bu yazıda CoCoox ide ile ADC okuma uygulamasını gösterceğim.Faydalı olması dileğiyle.

MAIN.C Dosya içeriği:

/* Includes ------------------------------------------------------------------*/
#include "stm32f0xx.h"
#include "stm32f0xx_adc.h"
#include "stm32f0xx_gpio.h"
#include "stm32f0xx_rcc.h"
#include "stm32f0xx_tim.h"


__IO uint16_t  ADC1ConvertedValue = 0, ADC1ConvertedVoltage = 0;

/* Private function prototypes -----------------------------------------------*/
void ButtonInit(void);
void ADC1_Config(void);

void ADC_read(void)
{

  /* User button configuration */
  ButtonInit();

  /* Configure ADC1 Channel 11 */
  ADC1_Config();

  /* Infinite loop */
  while (1)
  {
    /* Press User button to get the converted data */
    while(GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0) == RESET);

    /* Get ADC1 converted data */
    ADC1ConvertedValue = ADC_GetConversionValue(ADC1);

    /* Compute the voltage */
    ADC1ConvertedVoltage = (ADC1ConvertedValue * 3300)/0xFFF;

  }
}


void ButtonInit(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Enable the BUTTON Clock */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);

  /* Configure Button pin as input */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}


void ADC1_Config(void)
{
  ADC_InitTypeDef          ADC_InitStructure;
  GPIO_InitTypeDef         GPIO_InitStructure;
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  TIM_OCInitTypeDef        TIM_OCInitStructure;

  /* GPIOC Periph clock enable */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);

  /* ADC1 Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

  /* TIM3 Periph clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

  /* Configure ADC Channel11 as analog input */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 ;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* TIM3 Configuration *******************************************************/
  TIM_DeInit(TIM3);

  TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);

  TIM_OCStructInit(&TIM_OCInitStructure);

  /* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 0xFF;
  TIM_TimeBaseStructure.TIM_Prescaler = 0x0;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

  /* TIM3 TRGO selection */
  TIM_SelectOutputTrigger(TIM3, TIM_TRGOSource_Update);

  /* ADC1 Configuration *******************************************************/
  /* ADCs DeInit */
  ADC_DeInit(ADC1);

  /* Configure the ADC1 in continous mode withe a resolutuion equal to 12 bits*/
  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising;
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T3_TRGO;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;
  ADC_Init(ADC1, &ADC_InitStructure);

  /* Convert the ADC1 Channel 11 with 239.5 Cycles as sampling time */
  ADC_ChannelConfig(ADC1, ADC_Channel_11 , ADC_SampleTime_28_5Cycles);

  /* ADC Calibration */
  ADC_GetCalibrationFactor(ADC1);

  /* Enable the auto delay feature */
  ADC_WaitModeCmd(ADC1, ENABLE);

  /* Enable the Auto power off mode */
  ADC_AutoPowerOffCmd(ADC1, ENABLE);

  /* Enable ADCperipheral[PerIdx] */
  ADC_Cmd(ADC1, ENABLE);

  /* Wait the ADCEN falg */
  while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN));

  /* TIM2 enable counter */
  TIM_Cmd(TIM3, ENABLE);

  /* ADC1 regular Software Start Conv */
  ADC_StartOfConversion(ADC1);
}


int main(void)
{
ADC_read();
while(1){

}
}