Question
I am using STM32F407vg, i wrote a code for ADC while debugging value is not updating no errors as well in the code. i connected a 10K potentiometer to PA0, i checked with DMM no issues. I am adding my code snippet please let me know the mistake.
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_adc.h"
/* Private variables ---------------------------------------------------------*/
static __IO uint32_t uwTimingDelay;
RCC_ClocksTypeDef RCC_Clocks;
int Voltage = 0;
/* Private function prototypes -----------------------------------------------*/
static void Delay(__IO uint32_t nTime);
void ADC1_cha0_config(void);
int main(void)
{
/* SysTick end of count event each 10ms */
RCC_GetClocksFreq(&RCC_Clocks);
SysTick_Config(RCC_Clocks.HCLK_Frequency / 100);
ADC1_cha0_config();
/* Infinite loop */
while (1)
{
ADC_SoftwareStartConv(ADC1);
while(!ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC))
{
Voltage = ADC_GetConversionValue(ADC1);
}
if(Voltage == 0)
{
//nothing
}
Delay(100);
}
}
void ADC1_cha0_config() //PA0
{
/* Enable the GPIOA and ADC clock */
// RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
/* GPIOA and ADC structures */
GPIO_InitTypeDef GPIO_Adc_Stru;
ADC_InitTypeDef ADC1_Init_Stru;
GPIO_Adc_Stru.GPIO_Mode = GPIO_Mode_AN;
GPIO_Adc_Stru.GPIO_Pin = GPIO_Pin_0;
GPIO_Adc_Stru.GPIO_PuPd = GPIO_PuPd_NOPULL;
/* ADC struct initialization*/
ADC1_Init_Stru.ADC_ContinuousConvMode = DISABLE;
ADC1_Init_Stru.ADC_Resolution = ADC_Resolution_8b;
ADC1_Init_Stru.ADC_DataAlign = ADC_DataAlign_Right;
ADC1_Init_Stru.ADC_ExternalTrigConv = DISABLE;
ADC1_Init_Stru.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC1_Init_Stru.ADC_NbrOfConversion = 1;
ADC1_Init_Stru.ADC_ScanConvMode = DISABLE;
GPIO_Init(GPIOA,&GPIO_Adc_Stru);
ADC_Init(ADC1,&ADC1_Init_Stru);
ADC_Cmd(ADC1,ENABLE);
ADC_RegularChannelConfig(ADC1,ADC_Channel_0,1,ADC_SampleTime_84Cycles);
}
void Delay(__IO uint32_t nTime)
{
uwTimingDelay = nTime;
while(uwTimingDelay != 0);
}
void TimingDelay_Decrement(void)
{
if (uwTimingDelay != 0x00)
{
uwTimingDelay--;
}
}