ADC_IN0 on F030K6 not reading 3V3 voltage_divider

[WBria.1]

I'm pluging into ADC_IN0 1x pull-up and 5x buttons, that when i pressed some button, it adds a resistor to ground and make a voltage_divider... then i read the value on ADC.

But when i pressed the button, however, my ADC shows 0 on the variable and not the Vout from voltage_divider, like 1V or 0,5V.

I'm using CubeIDE with default ADC_IN0 config and making the while(1) as follow:

   hadc.Instance->CHSELR |= ADC_CHSELR_CHANNEL(ADC_CHANNEL_0);

   HAL_ADC_Start(&hadc);

   HAL_ADC_PollForConversion(&hadc,10);

   value_adc=HAL_ADC_GetValue(&hadc);

[Tesla DeLorean · Accepted solution]

Make sure the pins and clocks are suitably configured.

Perhaps find another worked ADC example as a point of reference.

Try using existing library code rather than ORing values to a register.

[WBria.1]

Tks Tesla,

Almost all of examples (from internet) uses the same sequence (1. config channel, 2. start the conversion, 3. poll... and then 4. read the value)

but yeas, i can try using some of the library example to test it.