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71 lines
2.6 KiB
71 lines
2.6 KiB
"""Sample code and test for adafruit_in219"""
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# Reads all voltage and current sensors for two I2C buses
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import time
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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 INA219
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if __name__ == "__main__":
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# print 'Length: ', len(sys.argv)
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buses = [1, 3] # default I2C buses
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config = False
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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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buses[0] = int(sys.argv[1], base=10)
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if (len(sys.argv)) > 2:
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buses[1] = int(sys.argv[2], base=10)
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if (len(sys.argv)) > 3:
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if sys.argv[3] == "c":
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config = True
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from adafruit_ina219 import ADCResolution, BusVoltageRange
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addresses = [0x40, 0x41, 0x44, 0x45] #INA219 addresses on the bus
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# print("buses: ", buses, " addr: ", addresses)
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while (True):
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for x in buses:
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try:
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i2c_bus = I2C(x) # Device is /dev/i2c-x
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for y in addresses:
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# print(x,y)
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try:
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# Create library object using Extended Bus I2C port
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# print("bus: ", x, " addr: ", y)
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if x == 0 and y == 0x45:
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# print("Reading INA219 in MoPower Board")
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i2c_bus = I2C(1)
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ina219 = INA219(i2c_bus, 0x4a)
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else:
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ina219 = INA219(i2c_bus, y)
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# print("ina219 test")
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if config:
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# print("Configuring")
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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 # 1S
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ina219.shunt_adc_resolution = ADCResolution.ADCRES_12BIT_32S # 1S
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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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if x == 0 and y == 0x45:
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current = current * 10
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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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print("{:6.3f} ".format(bus_voltage), "{:6.3f} ".format(current) , end = '')
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except:
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print("{:6.3f} ".format(0), "{:6.3f} ".format(0), end = '')
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except:
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print("{:6.3f} ".format(0), "{:6.3f} ".format(0), "{:6.3f} ".format(0), "{:6.3f} ".format(0), "{:6.3f} ".format(0), "{:6.3f} ".format(0), "{:6.3f} ".format(0), "{:6.3f} ".format(0), end = '')
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# pass
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print(" ")
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inp = input()
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# print(inp)
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