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Merged
merged 3 commits into from
Dec 14, 2020
Merged

Improve example outputs #26

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7a19aaf
Add power figures, cleanup output format
WizardTim Dec 3, 2020
791d076
Use overflow flag in example
WizardTim Dec 4, 2020
8052acb
Formatting
WizardTim Dec 4, 2020
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Add power figures, cleanup output format 
- Changed naming of 'PSU' and 'Load' voltages to 'VIN+' and 'VIN-' as I initially thought 'PSU' was referring to I2C logic level Vcc. Not sure why previous names were chosen, I can't find any IN219 eval boards that don't used VIN+/VIN-.
- Added power figures both from on chip register (lower resolution) as well as one calculated in Python using the full resolution voltage/current values
- Align output in columns with correct significant figures
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@WizardTim
WizardTim authored Dec 3, 2020
commit 7a19aaf1a77b9bb544c88dfb16697ec740b5378e
11 changes: 7 additions & 4 deletions examples/ina219_simpletest.py
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Expand Up @@ -31,12 +31,15 @@
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
power = ina219.power # power in watts

# INA219 measure bus voltage on the load side. So PSU voltage = bus_voltage + shunt_voltage
print("PSU Voltage: {:6.3f} V".format(bus_voltage + shunt_voltage))
print("Shunt Voltage: {:9.6f} V".format(shunt_voltage))
print("Load Voltage: {:6.3f} V".format(bus_voltage))
print("Current: {:9.6f} A".format(current / 1000))
print("Voltage (VIN+) : {:6.3f} V".format(bus_voltage + shunt_voltage))
print("Voltage (VIN-) : {:6.3f} V".format(bus_voltage))
print("Shunt Voltage : {:8.5f} V".format(shunt_voltage))
print("Shunt Current : {:7.4f} A".format(current / 1000))
print("Power Calc. : {:8.5f} W".format(bus_voltage*(current/1000)))
print("Power Register : {:6.3f} W".format(power))
print("")

time.sleep(2)