potmeter adc

Speek Isiner

Hello all,

I use function HalAdcRead to read values of potmeter.

This:value = HalAdcRead(HAL_ADC_CHANNEL_7, HAL_ADC_RESOLUTION_8);

When I fix value, for example 22, the display I get the value 22,23,22,23,22 ...

Does anyone know how this can be resolved?

Thanks

0 YiKai Chen over 9 years ago

Guru 735455 points

It is reasonable to see little variation in ADC reading.

0 Speek Isiner over 9 years ago in reply to YiKai Chen

But tolerance is + / -2,
When I fix value, for example 22, the display I get the value 22,23,24, 23,22, 24 ...

It is reasonable?

Thanks

0 YiKai Chen over 9 years ago in reply to Speek Isiner

Guru 735455 points

What is the scale of 22?

0 Speek Isiner over 9 years ago in reply to YiKai Chen

This is set temperature.

0 YiKai Chen over 9 years ago in reply to Speek Isiner

Guru 735455 points

ADC reading should be in voltage. Could you check the original reading?

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