Solved
CH2 on ADC1 does not work while CH15 or CH2+CH15 works fine.
Hi, I did a code to select which channel I want to enable in operation according to some parameters when I start the ADC configuration and TMR.
I have the ADC2 with ch5 and ch10, this work fine, both channels, or only 1 of them.
On ADC1 I have ch2 and ch15, both work fine, only ch15 also, but only ch2 I'm getting strange values on the buffer, more or less 4 times less than what's supposed to be.
Someone have any idea of what's happening?
Thank you!
void start_TMR_ADC_DMA(void){
// Reinitialize the ADCs to start fresh
MX_ADC1_Init(); // Reinitialize ADC1
MX_ADC2_Init(); // Reinitialize ADC2
ADC_ChannelConfTypeDef sConfig = {0};
// Variables to count the number of active ADC channels
uint8_t adc1_num_channels = 0;
uint8_t adc2_num_channels = 0;
// Configure ADC1 channels based on global variables
if (adc1_channel_2 == 1) {
// Enable ADC1 Channel 2
sConfig.Channel = ADC_CHANNEL_2;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_16CYCLES_5;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
sConfig.OffsetSignedSaturation = DISABLE;
HAL_ADC_ConfigChannel(&hadc1, &sConfig);
adc1_num_channels++; // Increment channel count
}
if (adc1_channel_15 == 1) {
// Enable ADC1 Channel 15
sConfig.Channel = ADC_CHANNEL_15;
sConfig.Rank = (adc1_num_channels == 1) ? ADC_REGULAR_RANK_2 : ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_16CYCLES_5;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
sConfig.OffsetSignedSaturation = DISABLE;
HAL_ADC_ConfigChannel(&hadc1, &sConfig);
adc1_num_channels++; // Increment channel count
}
// Configure ADC2 channels based on global variables
if (adc2_channel_5 == 1) {
// Enable ADC2 Channel 5
sConfig.Channel = ADC_CHANNEL_5;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_16CYCLES_5;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
sConfig.OffsetSignedSaturation = DISABLE;
HAL_ADC_ConfigChannel(&hadc2, &sConfig);
adc2_num_channels++; // Increment channel count
}
if (adc2_channel_10 == 1) {
// Enable ADC2 Channel 10
sConfig.Channel = ADC_CHANNEL_10;
sConfig.Rank = (adc2_num_channels == 1) ? ADC_REGULAR_RANK_2 : ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_16CYCLES_5;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
sConfig.OffsetSignedSaturation = DISABLE;
HAL_ADC_ConfigChannel(&hadc2, &sConfig);
adc2_num_channels++; // Increment channel count
}
// Set the number of conversions based on the number of enabled channels
if (adc1_num_channels > 0) {
hadc1.Init.NbrOfConversion = adc1_num_channels;
if (adc1_num_channels == 1) {
hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
} else {
hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
}
HAL_ADC_Init(&hadc1); // Reinitialize ADC1 to apply the new configuration
}
if (adc2_num_channels > 0) {
hadc2.Init.NbrOfConversion = adc2_num_channels;
if (adc2_num_channels == 1) {
hadc2.Init.ScanConvMode = ADC_SCAN_DISABLE;
} else {
hadc2.Init.ScanConvMode = ADC_SCAN_ENABLE;
}
HAL_ADC_Init(&hadc2); // Reinitialize ADC2 to apply the new configuration
}
// Reinitialize the timers to start fresh
MX_TIM2_Init(); // Reinitialize TIM2
MX_TIM3_Init(); // Reinitialize TIM3
// Start the ADC DMA for both ADCs, ensuring it starts from the beginning of the buffer
HAL_ADC_Start_DMA(&hadc1, (uint32_t *)adc_i_buffer, ADC_I_BUF_SIZE); // Start ADC1 DMA
HAL_ADC_Start_DMA(&hadc2, (uint32_t *)adc_v_buffer, ADC_V_BUF_SIZE); // Start ADC2 DMA with the first buffer
// Reset buffer loading state
v_buf_loaded = 0;
// Start the timers with interrupts
HAL_TIM_Base_Start_IT(&htim3);
HAL_TIM_Base_Start_IT(&htim2);
}static void MX_ADC1_Init(void)
{
/* USER CODE BEGIN ADC1_Init 0 */
/* USER CODE END ADC1_Init 0 */
ADC_MultiModeTypeDef multimode = {0};
ADC_ChannelConfTypeDef sConfig = {0};
/* USER CODE BEGIN ADC1_Init 1 */
/* USER CODE END ADC1_Init 1 */
/** Common config
*/
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
hadc1.Init.Resolution = ADC_RESOLUTION_16B;
hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc1.Init.LowPowerAutoWait = DISABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.NbrOfConversion = 2;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIG_T3_TRGO;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
hadc1.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DMA_CIRCULAR;
hadc1.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
hadc1.Init.LeftBitShift = ADC_LEFTBITSHIFT_NONE;
hadc1.Init.OversamplingMode = DISABLE;
hadc1.Init.Oversampling.Ratio = 1;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/** Configure the ADC multi-mode
*/
multimode.Mode = ADC_MODE_INDEPENDENT;
if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
/* sConfig.Channel = ADC_CHANNEL_15;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_16CYCLES_5;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
sConfig.OffsetSignedSaturation = DISABLE;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
/* sConfig.Channel = ADC_CHANNEL_2;
sConfig.Rank = ADC_REGULAR_RANK_2;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN ADC1_Init 2 */
/* USER CODE END ADC1_Init 2 */
}
/**
* @brief ADC2 Initialization Function
* @PAram None
* @retval None
*/
static void MX_ADC2_Init(void)
{
/* USER CODE BEGIN ADC2_Init 0 */
/* USER CODE END ADC2_Init 0 */
ADC_ChannelConfTypeDef sConfig = {0};
/* USER CODE BEGIN ADC2_Init 1 */
/* USER CODE END ADC2_Init 1 */
/** Common config
*/
hadc2.Instance = ADC2;
hadc2.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
hadc2.Init.Resolution = ADC_RESOLUTION_16B;
hadc2.Init.ScanConvMode = ADC_SCAN_ENABLE;
hadc2.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc2.Init.LowPowerAutoWait = DISABLE;
hadc2.Init.ContinuousConvMode = DISABLE;
hadc2.Init.NbrOfConversion = 2;
hadc2.Init.DiscontinuousConvMode = DISABLE;
hadc2.Init.ExternalTrigConv = ADC_EXTERNALTRIG_T3_TRGO;
hadc2.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
hadc2.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DMA_CIRCULAR;
hadc2.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
hadc2.Init.LeftBitShift = ADC_LEFTBITSHIFT_NONE;
hadc2.Init.OversamplingMode = DISABLE;
hadc2.Init.Oversampling.Ratio = 1;
if (HAL_ADC_Init(&hadc2) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
/* sConfig.Channel = ADC_CHANNEL_5;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_16CYCLES_5;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
sConfig.OffsetSignedSaturation = DISABLE;
if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
/* sConfig.Channel = ADC_CHANNEL_10;
sConfig.Rank = ADC_REGULAR_RANK_2;
if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN ADC2_Init 2 */
/* USER CODE END ADC2_Init 2 */
}