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63 lines
2.0 KiB
63 lines
2.0 KiB
"""Sample code and test for adafruit_in219"""
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import time
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import board
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import busio
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#import smbus
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#from adafruit_blinka.microcontroller.bcm283x import pin
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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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#i2c_bus2 = smbus.SMBus(3) # 3
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#b1 = i2c_bus2.read_i2c_block_data(0x45, 0x01, 2)
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#print (b1)
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#p = busio.I2C(scl, sda)
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#p = busio.I2C(pin.D1,pin.D0)
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#p = board.I2C(pin.D1,pin.D0)
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#p.deinit()
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# Create library object using our Extended Bus I2C port
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i2c_bus = I2C(11) # 1 Device is /dev/i2c-1
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#i2c_bus = board.I2C()
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#i2c_bus = p
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print(i2c_bus)
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ina219 = INA219(i2c_bus, 0x45)
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print("ina219 test")
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# display some of the advanced field (just to test)
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print("Config register:")
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print(" bus_voltage_range: 0x%1X" % ina219.bus_voltage_range)
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print(" gain: 0x%1X" % ina219.gain)
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print(" bus_adc_resolution: 0x%1X" % ina219.bus_adc_resolution)
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print(" shunt_adc_resolution: 0x%1X" % ina219.shunt_adc_resolution)
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print(" mode: 0x%1X" % ina219.mode)
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print("")
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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_32S
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ina219.shunt_adc_resolution = ADCResolution.ADCRES_12BIT_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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# measure and display loop
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while True:
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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("PSU Voltage: {:6.3f} V".format(bus_voltage + shunt_voltage))
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print("Shunt Voltage: {:9.6f} V".format(shunt_voltage))
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print("Load Voltage: {:6.3f} V".format(bus_voltage))
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print("Current: {:9.1f} mA".format(current))
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print("")
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time.sleep(2)
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