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Update INA219_UPS.py

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sbshop1
2022-03-14 10:32:51 +05:30
committed by GitHub
parent a39766895b
commit 028efb8d38
1 changed files with 28 additions and 32 deletions
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60
INA219_UPS.py
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@@ -22,24 +22,20 @@ def info_print():
oled_display = SSD1306()
info_print()
# Config Register (R/W)
_REG_CONFIG = 0x00
# SHUNT VOLTAGE REGISTER (R)
_REG_SHUNTVOLTAGE = 0x01
# BUS VOLTAGE REGISTER (R)
_REG_BUSVOLTAGE = 0x02
_REG_CONFIG = 0x00 # Config Register (R/W)
# POWER REGISTER (R)
_REG_POWER = 0x03
_REG_SHUNTVOLTAGE = 0x01 # SHUNT VOLTAGE REGISTER (R)
# CURRENT REGISTER (R)
_REG_CURRENT = 0x04
_REG_BUSVOLTAGE = 0x02 # BUS VOLTAGE REGISTER (R)
# CALIBRATION REGISTER (R/W)
_REG_CALIBRATION = 0x05
_REG_POWER = 0x03 # POWER REGISTER (R)
class BusVoltageRange:
_REG_CURRENT = 0x04 # CURRENT REGISTER (R)
_REG_CALIBRATION = 0x05 # CALIBRATION REGISTER (R/W)
class Bus_Voltage_Range:
"""Constants for ``bus_voltage_range``"""
RANGE_16V = 0x00 # set bus voltage range to 16V
RANGE_32V = 0x01 # set bus voltage range to 32V (default)
@@ -86,7 +82,7 @@ class INA219:
self._cal_value = 0
self._current_lsb = 0
self._power_lsb = 0
self.set_calibration_32V_2A()
self.calibration()
def read(self,address):
data = self.bus.read_i2c_block_data(self.addr, address, 2)
@@ -99,17 +95,17 @@ class INA219:
self.bus.write_i2c_block_data(self.addr,address,temp)
def set_calibration_32V_2A(self):
def calibration(self): # set calibration 32V ,2A
"""Configures to INA219 to be able to measure up to 32V and 2A of current. Counter
overflow occurs at 3.2A.
..note :: These calculations assume a 0.1 shunt ohm resistor is present
"""
self._current_lsb = .1 # Current LSB = 100uA per bit
self._current_lsb = 0.1 # Current LSB = 100uA per bit
self._cal_value = 4096
self._power_lsb = .002 # Power LSB = 2mW per bit
self._power_lsb = 0.002 # Power LSB = 2mW per bit
@@ -117,7 +113,7 @@ class INA219:
self.write(_REG_CALIBRATION,self._cal_value)
# Set Config register to take into account the settings above
self.bus_voltage_range = BusVoltageRange.RANGE_32V
self.bus_voltage_range = Bus_Voltage_Range.RANGE_32V
self.gain = Gain.DIV_8_320MV
self.bus_adc_resolution = ADC_Resolution.ADCRES_12BIT_32S
self.shunt_adc_resolution = ADC_Resolution.ADCRES_12BIT_32S
@@ -129,41 +125,41 @@ class INA219:
self.mode
self.write(_REG_CONFIG,self.config)
def Shunt_Voltage_mV(self):
def Shunt_Voltage(self): # shunt voltage in milli volt
self.write(_REG_CALIBRATION,self._cal_value)
value = self.read(_REG_SHUNTVOLTAGE)
if value > 32767:
value -= 65535
return value * 0.01
def Bus_Voltage_V(self):
self.write(_REG_CALIBRATION,self._cal_value)
self.read(_REG_BUSVOLTAGE)
return (self.read(_REG_BUSVOLTAGE) >> 3) * 0.004
def Current_mA(self):
def Current(self): # current in milli amp
value = self.read(_REG_CURRENT)
if value > 32767:
value -= 65535
return value * self._current_lsb
def Power_Watt(self):
def Power(self):
self.write(_REG_CALIBRATION,self._cal_value)
value = self.read(_REG_POWER)
if value > 32767:
value -= 65535
return value * self._power_lsb
def Bus_Voltage(self):
self.write(_REG_CALIBRATION,self._cal_value)
self.read(_REG_BUSVOLTAGE)
return (self.read(_REG_BUSVOLTAGE) >> 3) * 0.004
# Create an INA219 instance.
ina219 = INA219(addr=0x42)
while True:
bus_voltage = ina219.Bus_Voltage_V() # voltage on V- (load side)
shunt_voltage = ina219.Shunt_Voltage_mV() / 1000 # voltage between V+ and V- across the shunt
current = ina219.Current_mA() # current in mA
power = ina219.Power_Watt() # power in W
bus_voltage = ina219.Bus_Voltage() # voltage on V- (load side)
shunt_voltage = ina219.Shunt_Voltage() / 1000 # voltage between V+ and V- across the shunt
current = ina219.Current() # current in mA
power = ina219.Power() # power in W
p = (bus_voltage - 6)/2.4*100
if(p > 100):p = 100
if(p < 0):p = 0