49 lines
1.6 KiB
Python
49 lines
1.6 KiB
Python
import time
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from machine import Pin
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from pimoroni import Analog, AnalogMux, Button
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from servo import servo2040
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"""
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Shows how to initialise and read the 6 external
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and 2 internal sensors of Servo 2040.
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Press "Boot" to exit the program.
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"""
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# Set up the shared analog inputs
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sen_adc = Analog(servo2040.SHARED_ADC)
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vol_adc = Analog(servo2040.SHARED_ADC, servo2040.VOLTAGE_GAIN)
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cur_adc = Analog(servo2040.SHARED_ADC, servo2040.CURRENT_GAIN,
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servo2040.SHUNT_RESISTOR, servo2040.CURRENT_OFFSET)
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# Set up the analog multiplexer, including the pin for controlling pull-up/pull-down
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mux = AnalogMux(servo2040.ADC_ADDR_0, servo2040.ADC_ADDR_1, servo2040.ADC_ADDR_2,
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muxed_pin=Pin(servo2040.SHARED_ADC))
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# Set up the sensor addresses and have them pulled down by default
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sensor_addrs = list(range(servo2040.SENSOR_1_ADDR, servo2040.SENSOR_6_ADDR + 1))
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for addr in sensor_addrs:
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mux.configure_pull(addr, Pin.PULL_DOWN)
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# Create the user button
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user_sw = Button(servo2040.USER_SW)
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# Read sensors until the user button is pressed
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while user_sw.raw() is not True:
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# Read each sensor in turn and print its voltage
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for i in range(len(sensor_addrs)):
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mux.select(sensor_addrs[i])
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print("S", i + 1, " = ", round(sen_adc.read_voltage(), 3), sep="", end=", ")
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# Read the voltage sense and print the value
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mux.select(servo2040.VOLTAGE_SENSE_ADDR)
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print("Voltage =", round(vol_adc.read_voltage(), 4), end=", ")
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# Read the current sense and print the value
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mux.select(servo2040.CURRENT_SENSE_ADDR)
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print("Current =", round(cur_adc.read_current(), 4))
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time.sleep(0.5)
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