General analog exercises

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Convert the measured voltage to mV units

Write a function that returns an integer that represensts the ADC value converted into mV units. The input parameter is the data returned by the ADC. The function should take all relevant ADC settings into account: justification, repeat count, voltage reference settings. If the voltage refernce can be external (it is not VDD and the internal reference buffer is disabled), handle this using a constant that defines the value.