storing values in array related to ADC Values ( continous conversion mode)

[Apill]

Hi ,

I am trying to store values from adc pin in an array but could not able to do. I have assigned pina0 as ADC input, configured adc to take the values every one second( counter period 1000), apb clock 16 MHz, prescaler in timer 16000. but i didnt understand why my values are not storing in an array every one second. to check if the function is called every second i have placed a variable 'i' and incremented after every passing of function. The values of i are updated very quickly than what i have requested. I am in an impression that this below interrupt will be called every second but its not really happening that way. See below basic code.

I can able to read the values from the adc pin though.

I would like store the inputs of adc every second and store them in an array how can i do that ?

when i have placed these in the cnvtcpltcallback function :

a[i] = adcval;

i++;

the code isnt working the way i wanted to work i mean all the values in less than a second are getting stored in an array.

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)

{

 /* Prevent unused argument(s) compilation warning */

 adcval= HAL_ADC_GetValue(&hadc1);

 /* NOTE : This function Should not be modified, when the callback is needed,

      the HAL_ADC_ConvCpltCallback could be implemented in the user file

  */

i++;

}

in the main function i have kept the following

HAL_Tim_Base_Start(&htim2);

HAL_ADC_Start_IT(&hadc1);

static void MX_TIM2_Init(void)

{

 TIM_ClockConfigTypeDef sClockSourceConfig;

 TIM_MasterConfigTypeDef sMasterConfig;

 htim2.Instance = TIM2;

 htim2.Init.Prescaler = 16000;

 htim2.Init.CounterMode = TIM_COUNTERMODE_UP;

 htim2.Init.Period = 1000;

 htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;

 if (HAL_TIM_Base_Init(&htim2) != HAL_OK)

 {

  _Error_Handler(__FILE__, __LINE__);

 }

 sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;

 if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)

 {

  _Error_Handler(__FILE__, __LINE__);

 }

 sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;

 sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;

 if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)

 {

  _Error_Handler(__FILE__, __LINE__);

 }

}

[T J]

this code works;

here I copy this new data set into the next row of my table.

there are 16 rows, spanning the last 16 sets of readings.

all post processing is done is a worker thread in the foreground.

extern "C" void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc){
 
	HAL_ADC_CompleteCycle = true;		 // signal foreground to process 
										// copy 15 results away now
		for (int i=0;i < ADC_ChannelCount;i++)
		HAL_ADC_Channel_Buffer [ADC_RowCounter][i] = ADC_DMABuffer[i]; 
 
	ADC_RowCounter ++;		// for next time through the loop
	if ( ADC_RowCounter >= ADC_RowCount)   // 16 rows
                ADC_RowCounter =0;		
	
}

[Apill]

I used a period elapsed event of timer function and delclared an array there so the issue is solved but i am open for other comments as well