Create current.py

python/current.py

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+"""Sample code and test for adafruit_in219"""
+
+import sys
+import board
+import busio
+from adafruit_extended_bus import ExtendedI2C as I2C
+from adafruit_ina219 import ADCResolution, BusVoltageRange, INA219
+
+if __name__ == "__main__":
+#	    print 'Length: ', len(sys.argv)
+    
+  if (len(sys.argv)) > 1:
+#   print("There are arguments!")
+#   if (('a' == sys.argv[1]) or ('afsk' in sys.argv[1])):
+    bus = int(sys.argv[1], base=10)
+    if (len(sys.argv)) > 2:
+      address = int(sys.argv[2], base=16)
+    else:
+      address = 0x40
+  else:
+    bus = 1
+    address = 0x40
+
+  # Create library object using  Extended Bus I2C port
+  i2c_bus = I2C(bus) # 1 Device is /dev/i2c-1
+   
+  ina219 = INA219(i2c_bus, address)
+
+#   print("ina219 test")
+
+# optional : change configuration to use 32 samples averaging for both bus voltage and shunt voltage
+  ina219.bus_adc_resolution = ADCResolution.ADCRES_12BIT_32S
+  ina219.shunt_adc_resolution = ADCResolution.ADCRES_12BIT_32S
+# optional : change voltage range to 16V
+  ina219.bus_voltage_range = BusVoltageRange.RANGE_16V
+
+  bus_voltage = ina219.bus_voltage  # voltage on V- (load side)
+  shunt_voltage = ina219.shunt_voltage  # voltage between V+ and V- across the shunt
+#    current = ina219.current  # current in mA
+
+    # INA219 measure bus voltage on the load side. So PSU voltage = bus_voltage + shunt_voltage
+#  print("{:6.3f}".format(bus_voltage + shunt_voltage))
+#    print("Shunt Voltage: {:9.6f} V".format(shunt_voltage))
+#    print("Load Voltage:  {:6.3f} V".format(bus_voltage))
+  print("{:9.1f}".format(current))
+#    print("")
+
+#   time.sleep(2)