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Sorry, I misunderstood.
AVCC is connected to 3.3volts. For the chip I am using (STM32F103RB), there is no analog reference input pin. Also, I could not found any register containing internal reference voltage setting.
Hello,
I am using a custom built PCB having two STM32 microcontrollers. There are four motors around the PCB, each of them drawing 4-5A current.
I am trying to measure battery voltage on the PCB using one of the ADC channels of the microcontroller. I calibrated the ADC values with voltmeter...
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