I'm having a trouble when using multichannel ADC. In my application there is 2 ADC which contains 7 channels. In ADC Interrupt Callback, I'm pushing the read data to array of 7 elements. But I couldn't see the proper value in proper element of array, they are sliding in the array countinously.
Each ADC contain seven ACS725. So there is no High-Z situation. I'm seeing at the pins 0.5V constant (zero current) . My callback and init part is in above. Thanks a lot for your help!
/* ADC3 init function */
void MX_ADC3_Init(void)
{
ADC_ChannelConfTypeDef sConfig = {0};
/** Common config
*/
hadc3.Instance = ADC3;
hadc3.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV4;
hadc3.Init.Resolution = ADC_RESOLUTION_16B;
hadc3.Init.ScanConvMode = ADC_SCAN_ENABLE;
hadc3.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc3.Init.LowPowerAutoWait = DISABLE;
hadc3.Init.ContinuousConvMode = DISABLE;
hadc3.Init.NbrOfConversion = 7;
hadc3.Init.DiscontinuousConvMode = DISABLE;
hadc3.Init.ExternalTrigConv = ADC_EXTERNALTRIG_T15_TRGO;
hadc3.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
hadc3.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DR;
hadc3.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
hadc3.Init.LeftBitShift = ADC_LEFTBITSHIFT_NONE;
hadc3.Init.OversamplingMode = DISABLE;
if (HAL_ADC_Init(&hadc3) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_0;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
sConfig.OffsetSignedSaturation = DISABLE;
if (HAL_ADC_ConfigChannel(&hadc3, &sConfig) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_1;
sConfig.Rank = ADC_REGULAR_RANK_2;
if (HAL_ADC_ConfigChannel(&hadc3, &sConfig) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_2;
sConfig.Rank = ADC_REGULAR_RANK_3;
if (HAL_ADC_ConfigChannel(&hadc3, &sConfig) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_3;
sConfig.Rank = ADC_REGULAR_RANK_4;
if (HAL_ADC_ConfigChannel(&hadc3, &sConfig) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_6;
sConfig.Rank = ADC_REGULAR_RANK_5;
if (HAL_ADC_ConfigChannel(&hadc3, &sConfig) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_7;
sConfig.Rank = ADC_REGULAR_RANK_6;
if (HAL_ADC_ConfigChannel(&hadc3, &sConfig) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_8;
sConfig.Rank = ADC_REGULAR_RANK_7;
if (HAL_ADC_ConfigChannel(&hadc3, &sConfig) != HAL_OK)
{
Error_Handler();
}
}void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
if(__HAL_ADC_GET_FLAG(&hadc1, ADC_FLAG_EOC))
{
g_internalAdc1.m_rawResultArray[cntAcs1++] = (uint16_t) HAL_ADC_GetValue(hadc);
if(cntAcs1 == g_internalAdc1.MS_NUMBER_OF_CHANNEL)
{
cntAcs1 = 0;
g_internalAdc1Ready = true;
}
}
if(__HAL_ADC_GET_FLAG(&hadc3, ADC_FLAG_EOC))
{
g_internalAdc2.m_rawResultArray[cntAcs2++] = (uint16_t) HAL_ADC_GetValue(hadc);
if(cntAcs2 == g_internalAdc2.MS_NUMBER_OF_CHANNEL)
{
cntAcs2 = 0;
g_internalAdc2Ready = true;
}
}
}In SystemClock_Config function:
PeriphClkInitStruct.AdcClockSelection = RCC_ADCCLKSOURCE_PLL3; //129Mhz ( (I also tried other options)My timer also adjusted to 40ms period.
In debug, what I mean results are sliding in the array :
etc...
(while ~7000 raw data is zero current, ~14000 is equalt to 1.2 Amper. I'm applying the 1.2A to only one channel that has to be in the 3rd element of the array)
After I tried with a new project with applying same configurations with using only 2 channel: I aware that there is only 1 conversion result. The other result does not seen on the callback and also DR register. And when I start the ADC with software(without timer trig) it looks like it takes the result from random channel. I could not solve problem for three days.
Thanks again.
Hello
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if(hadc==&hadc1) {;}
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