You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
50 lines
1.6 KiB
50 lines
1.6 KiB
"""Sample code and test for adafruit_in219"""
|
|
|
|
import time
|
|
import board
|
|
import smbus
|
|
from adafruit_ina219 import ADCResolution, BusVoltageRange, INA219
|
|
|
|
i2c_bus2 = smbus.SMBus(3)
|
|
b1 = i2c_bus2.read_i2c_block_data(0x45, 0x01, 2)
|
|
print (b1)
|
|
|
|
|
|
i2c_bus = board.I2C()
|
|
|
|
print(i2c_bus)
|
|
|
|
ina219 = INA219(i2c_bus, 0x45)
|
|
|
|
print("ina219 test")
|
|
|
|
# display some of the advanced field (just to test)
|
|
print("Config register:")
|
|
print(" bus_voltage_range: 0x%1X" % ina219.bus_voltage_range)
|
|
print(" gain: 0x%1X" % ina219.gain)
|
|
print(" bus_adc_resolution: 0x%1X" % ina219.bus_adc_resolution)
|
|
print(" shunt_adc_resolution: 0x%1X" % ina219.shunt_adc_resolution)
|
|
print(" mode: 0x%1X" % ina219.mode)
|
|
print("")
|
|
|
|
# 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
|
|
|
|
# measure and display loop
|
|
while True:
|
|
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("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("")
|
|
|
|
time.sleep(2)
|