We will create a new
VoltageInput class to represent a voltage source connected to our board, specifically, to an analog input pin. The following lines show the code for the new
VoltageInput class that works with the
mraa library. The code file for the sample is
import mraa import time class VoltageInput: def __init__(self, analog_pin): self.analog_pin = analog_pin self.aio = mraa.Aio(analog_pin) # Configure ADC resolution to 12 bits (0 to 4095) self.aio.setBit(12) @property def voltage(self): raw_value = self.aio.read() return raw_value / 4095.0 * 5.0
We have to specify the analog pin number to which the voltage source is connected when we create an instance ...