In CubeMX program for the ADC I want 4 ADC channels, but the MX program only lets me enter data for 3. How do I put in data for Rank 1?

Looking at the code generated it is as follows.

static void MX_ADC1_Init(void)
{
 
 /* USER CODE BEGIN ADC1_Init 0 */
 
 /* USER CODE END ADC1_Init 0 */
 
 ADC_ChannelConfTypeDef sConfig = {0};
 
 /* USER CODE BEGIN ADC1_Init 1 */
 
 /* USER CODE END ADC1_Init 1 */
 
 /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
 */
 hadc1.Instance = ADC1;
 hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
 hadc1.Init.Resolution = ADC_RESOLUTION_12B;
 hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
 hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
 hadc1.Init.EOCSelection = ADC_EOC_SEQ_CONV;
 hadc1.Init.LowPowerAutoWait = DISABLE;
 hadc1.Init.LowPowerAutoPowerOff = DISABLE;
 hadc1.Init.ContinuousConvMode = DISABLE;
 hadc1.Init.NbrOfConversion = 4;
 hadc1.Init.DiscontinuousConvMode = ENABLE;
 hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIG_T3_TRGO;
 hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
 hadc1.Init.DMAContinuousRequests = DISABLE;
 hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
 hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_39CYCLES_5;
 hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_160CYCLES_5;
 hadc1.Init.OversamplingMode = ENABLE;
 hadc1.Init.Oversampling.Ratio = ADC_OVERSAMPLING_RATIO_8;
 hadc1.Init.Oversampling.RightBitShift = ADC_RIGHTBITSHIFT_NONE;
 hadc1.Init.Oversampling.TriggeredMode = ADC_TRIGGEREDMODE_SINGLE_TRIGGER;
 hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH;
 if (HAL_ADC_Init(&hadc1) != HAL_OK)
 {
 Error_Handler();
 }
 
 /** Configure Regular Channel
 */
 sConfig.Channel = ADC_CHANNEL_VREFINT;
 sConfig.Rank = ADC_REGULAR_RANK_2;
 sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_2;
 if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
 {
 Error_Handler();
 }
 
 /** Configure Regular Channel
 */
 sConfig.Channel = ADC_CHANNEL_0;
 sConfig.Rank = ADC_REGULAR_RANK_3;
 sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_1;
 if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
 {
 Error_Handler();
 }
 
 /** Configure Regular Channel
 */
 sConfig.Channel = ADC_CHANNEL_1;
 sConfig.Rank = ADC_REGULAR_RANK_4;
 if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
 {
 Error_Handler();
 }
 /* USER CODE BEGIN ADC1_Init 2 */
 
 /** Configure Regular Channel
 */
 sConfig.Channel = ADC_CHANNEL_TEMPSENSOR;
 sConfig.Rank = ADC_REGULAR_RANK_1;
 sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_2;
 if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
 {
 Error_Handler();
 }
 /* USER CODE END ADC1_Init 2 */
 
}

So I added a section in the user code to setup Rank 1.

That is all I can think of at the moment.

Hello @KiptonM​,

Thank you for your feedback,

Could you please share an IOC file demonstrating the issue, that would be really helpful :) .

Best regards,

Aziz

I deselected the ADC channels saved it, closed the program. Started it again, Selected the channels, and reconfigured the ADC, and it is working now.

Thanks,

Hello @KiptonM​,

Did you by any chance use the import project feature in CubeMX. We noticed that using that feature can cause the issue you mentioned. Do you confirm this ? and if not could you please specify a scenario to reproduce the "missing rank 1" behavior.

Your contribution will certainly help us to pinpoint the root cause.

Thanks,

Aziz

Hello @KiptonM​,

I apologize for the late reply,

You are right, this is also a known issue and have been reported. It also has been raised in the community under this thread.

Thank you for reporting. These issues are being worked on by CubeMX development team, we will keep you posted with updates.

Best regards,

Aziz