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45 lines
1.4 KiB
45 lines
1.4 KiB
"""Sample code and test for adafruit_in219"""
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import sys
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import board
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import busio
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from adafruit_extended_bus import ExtendedI2C as I2C
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from adafruit_ina219 import ADCResolution, BusVoltageRange, INA219
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if __name__ == "__main__":
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# print 'Length: ', len(sys.argv)
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if (len(sys.argv)) > 1:
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# print("There are arguments!")
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# if (('a' == sys.argv[1]) or ('afsk' in sys.argv[1])):
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bus = int(sys.argv[1], base=10)
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if (len(sys.argv)) > 2:
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address = int(sys.argv[2], base=16)
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else:
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address = 0x40
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else:
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bus = 1
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address = 0x40
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try:
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# Create library object using Extended Bus I2C port
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i2c_bus = I2C(bus) # 1 Device is /dev/i2c-1
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ina219 = INA219(i2c_bus, address)
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# print("ina219 test")
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# optional : change configuration to use 32 samples averaging for both bus voltage and shunt voltage
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ina219.bus_adc_resolution = ADCResolution.ADCRES_12BIT_1S # 32S
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ina219.shunt_adc_resolution = ADCResolution.ADCRES_12BIT_1S # 32S
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# optional : change voltage range to 16V
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ina219.bus_voltage_range = BusVoltageRange.RANGE_16V
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bus_voltage = ina219.bus_voltage # voltage on V- (load side)
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shunt_voltage = ina219.shunt_voltage # voltage between V+ and V- across the shunt
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# current = ina219.current # current in mA
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# INA219 measure bus voltage on the load side. So PSU voltage = bus_voltage + shunt_voltage
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print("{:6.3f}".format(bus_voltage + shunt_voltage))
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except:
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print("0.0 Error")
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