How to use ADC on Nucleo-G491

[KatsuMat]

I am unable to obtain ADC values and would like some advice.

Here is the source code project.

https://github.com/katsumat/STM32CubeIDE/tree/main/workspace_1.16.1/ADCCalibration

PA0 is connected to GND, PA1 to Vdd, and PA3 to the output of a variable resistor.

The ends of the variable resistor are connected to Vdd and GND, ensuring an output range of 0 to 3.3V.

The input voltages for PA0, PA1, and PA3 are as follows:

Here are the results after setting a breakpoint and checking:

The variable did not hold any value.

[KnarfB]

Look at the generated config code in your main.c lines 246 ff and copy that as closely as possible in your own configs. ADC_REGULAR_RANK_1 is not a 1, offset fields shall be initialized, etc.. 

hth

KnarfB

[KatsuMat]

The value has been entered!

Thank you!!

I have corrected the bolded part.

sConfig.Channel = ADC_CHANNEL_1;

sConfig.Rank = ADC_REGULAR_RANK_1;

sConfig.SamplingTime = ADC_SAMPLETIME_2CYCLES_5;

sConfig.SingleDiff = ADC_SINGLE_ENDED;

sConfig.OffsetNumber = ADC_OFFSET_NONE;

sConfig.Offset = 0;

HAL_ADC_ConfigChannel(&hadc1, &sConfig);

HAL_ADC_Start(&hadc1);

HAL_ADC_PollForConversion(&hadc1, 1000);

OffsetAcc = HAL_ADC_GetValue(&hadc1);

HAL_ADC_Stop(&hadc1);

hadc1.Instance->SQR1 = 0;