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problem with stm32f adc+timer+

Question asked by eini.reza on Nov 27, 2015
Latest reply on Nov 27, 2015 by Clive One
i'm beginner in stm32f407 .i'm trying to get adc values of 6 channels at 2khz frequency
i dont know how to do it.i tested timer i expected is overfollws in 1s but it isnt giving me the right results . ive questions about adc and timer clock
1-what is these two terms in adc configuration
** ADC_TwoSamplingDelay_5Cycles;
**ADC_TwoSamplingDelay;
2-how can i configure adc sampling rate with timer and interrupt
please someone kindly help me to do it here is my code :

#include "stm32f4xx.h"
#include "system_stm32f4xx.h"
#include "tm_stm32f4_hd44780.h"
#include "stm32f4xx.h"
#include "stm32f4xx_tim.h"
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_gpio.h"
#include "defines.h"
//#include "arm_const_structs.h"
//#include "math_helper.h"
//#include "system_ARMCM4.h"
#include "stm32f4xx_adc.h"
#include "stm32f4xx_dma.h"
#include "tm_stm32f4_adc.h"
#include "tm_stm32f4_delay.h"
#include "tm_stm32f4_gpio.h"
#include "stdio.h"
#define rezabuffer0 [1024]
#define rezabuffer1 1024
#define rezabuffer2 1024
#define rezabuffer3 1024
#define rezabuffer4 1024
#define rezabuffer5 1024
#define rezabuffer6 1024
uint16_t rezareadadc(ADC_TypeDef* ADCx, uint8_t channel) {
    int i;
    ADC_RegularChannelConfig(ADCx, channel, 0, ADC_SampleTime_15Cycles);
    ADC_SoftwareStartConv(ADCx);
    
    /* Wait till done */
    while (ADC_GetFlagStatus(ADCx, ADC_FLAG_EOC) == RESET);
    
    /* Return result */
    return ADC_GetConversionValue(ADCx);
}
int rezafft(){

}
void rezapins()
{
      GPIO_InitTypeDef GPIO_InitStructure;
      GPIO_InitTypeDef gpioStructure;
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
    gpioStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13;
    gpioStructure.GPIO_Mode = GPIO_Mode_OUT;
    gpioStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOD, &gpioStructure);
 
    GPIO_WriteBit(GPIOD, GPIO_Pin_12 | GPIO_Pin_13, Bit_RESET);
     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1/* |GPIO_Pin_2 | GPIO_Pin_3
    | GPIO_Pin_5 | GPIO_Pin_6*/;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}
 
void rezaTimer()
{
      TIM_TimeBaseInitTypeDef timerInitStructure;
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM7, ENABLE);
 
    
    timerInitStructure.TIM_Prescaler = 84;
    timerInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
    timerInitStructure.TIM_Period = 9999;
    timerInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    timerInitStructure.TIM_RepetitionCounter = 0;
    TIM_TimeBaseInit(TIM7, &timerInitStructure);
    TIM_Cmd(TIM7, ENABLE);
}
 int rezaintrrupt(){
 NVIC_InitTypeDef nvicStructure;
    nvicStructure.NVIC_IRQChannel = TIM7_IRQn;
    nvicStructure.NVIC_IRQChannelPreemptionPriority = 0;
    nvicStructure.NVIC_IRQChannelSubPriority = 0;
    nvicStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&nvicStructure);
}
void rezaadcconfg(void)
{
    ADC_InitTypeDef       ADC_InitStructure;
  ADC_CommonInitTypeDef ADC_CommonInitStructure;
 ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
  ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
  ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
  ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
  ADC_CommonInit(&ADC_CommonInitStructure);
 
  /* ADC1 Init ****************************************************************/
  ADC_InitStructure.ADC_Resolution = ADC_Resolution_6b;
  ADC_InitStructure.ADC_ScanConvMode = ENABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfConversion = 1;

}



int main()
{
    int j=0;
    int VA[1024];
    int VB[1024];
    int VC[1024];
    int IA[1024];
    int IB[1024];
    int IC[1024];
    int IN[1024];
    rezapins();
     rezaTimer();
     rezaintrrupt();
     rezaadcconfg();
         while (j<=1024){
            
            if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
    {
        TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
               VA[j]=rezareadadc(ADC1,0);         
               j++;
}             
}
}

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