Der liebe Fritzler hat mir was gelötet.
Ein Python Script welches auf einem Raspi-Zero läuft und den I2C Quark vom BQ77PL900 und BQ34Z100 mitliest und Decodiert.
an den Akku an der BMS Platine anstecken und mitlesen.
Code: Alles auswählen
#!/usr/bin/python
#
# Forumakku Script zur Diagnose des BQ77PL900
# und des BQ34Z100
#
# I2C Anschließen an Raspi_Zero Pin3 I2C DATA, Pin5 I2C Clock, Pin 9 GND
# Idee: Hightech
# Realisation: Fritzler
#
#
from smbus import SMBus
from bitstring import BitArray, BitStream
import time
import os
i2cbus = SMBus(1) # Create a new I2C bus
i2caddress = 0x10 # Address of BQ77PL900
i2caddress_fg = 0x55 # Address of BQ34z100
class bq77_register:
def __init__(self,nameReg,bitNameList):
self.nameReg = nameReg
self.bitNameList = bitNameList
regList=[]
regList.append(bq77_register('Status', ['Charge','Discharge','VGOOD','OverTemp','UnderVoltage','OverVoltage','OverLoad','ShortDischarge']))
regList.append(bq77_register('Output_Control', ['FS','ParityErrorEeprom','NULL','NULL','GPOD','ChargeHostModus','DischargeHostModus','Faultlatch']))
regList.append(bq77_register('State_Contol', ['IGAIN','VGAIN','NULL','NULL','NULL','NULL','HostMode','ShutDownEnable']))
regList.append(bq77_register('Function_Control', ['CBAL09','CBAL10','TOUT','BAT','PACK','IACAL','IAEN','VAEN']))
regList.append(bq77_register('Cell_Balance', ['CBAL08','CBAL07','CBAL06','CBAL05','CBAL04','CBAL03','CBAL02','CBAL01']))
regList.append(bq77_register('Cell_Sel', ['NULL','CAL2','CAL1','CAL0','CELL4','CELL3','CELL2','CELL1']))
regList.append(bq77_register('OverVoltage_Delay_Hysteresis', ['OVD2','OVD1','OVD0','OVH1','OVH0','OV2','OV1','OV0']))
regList.append(bq77_register('UnderVoltage_Delay_Hysteresis', ['UVFET_DIS','UVH1','UVH0','UV3','UV2','UV2','UV1','UV0']))
regList.append(bq77_register('OverCurrent_UnderVoltage_Delay', ['UVD3','UVD2','UVD1','UVD0','OCD3','OCD2','OCD1','OCD0']))
regList.append(bq77_register('OverCurrent_Discharge', ['CellBalEn','Zero_V_Charge','RecoverCondition','OCDD4','OCDD3','OCDD2','OCDD1','OCDD0']))
regList.append(bq77_register('Short_Discharge_Cfg', ['SCDD3','SCDD2','SCDD1','SCDD0','SCD3','SCD2','SCD1','SCD0']))
try:
while True:
os.system('cls' if os.name == 'nt' else 'clear')
print("---------- BQ77PL900--------------------")
print ("\n")
for registerAddr in range(len(regList)):
regByte = i2cbus.read_byte_data(i2caddress, registerAddr)
regBits = '{0:08b}'.format(regByte)
regObj = regList[registerAddr]
firstBlood = True
outStr = regObj.nameReg + ": "
for bitNum in range(8):
if regBits[bitNum] == "1":
if (False == firstBlood):
outStr += ", "
outStr += regObj.bitNameList[bitNum]
firstBlood = False
if (False == firstBlood):
outStr += " "
print(outStr)
print("\n")
if (i2cbus.read_word_data(i2caddress_fg, 0x02)):
print("---------- BQ34Z1000--------------------")
print("\n")
fg_Byte = i2cbus.read_word_data(i2caddress_fg, 0x02)
print ("Ladezustand "+str(fg_Byte)+" %")
fg_Byte = i2cbus.read_word_data(i2caddress_fg, 0x04)
print ("Restkapazität "+str(fg_Byte/100)+" Ah")
fg_Byte = i2cbus.read_word_data(i2caddress_fg, 0x06)
print ("Kapazität "+str(fg_Byte/100)+" Ah")
fg_Byte = i2cbus.read_word_data(i2caddress_fg, 0x08)
print ("Spannung "+str(fg_Byte/1000)+" Volt")
fg_Byte = i2cbus.read_word_data(i2caddress_fg, 0x0A)
print ("Durchschnitt Strom "+str(fg_Byte/10000)+" A")
fg_Byte = i2cbus.read_word_data(i2caddress_fg, 0x0C)
print ("Temperatur "+str(fg_Byte/100)+" °C")
fg_Byte = i2cbus.read_word_data(i2caddress_fg, 0x10)
time.sleep(1)
except KeyboardInterrupt:
print("Oh! you pressed CTRL + C.")
print("Program interrupted.")
Danke trotzdem!
Aber yay, das wäre ganz toll, da nochmal ein paar Details abzuzeichnen. Andererseits bin ich mit meinem beschriebenen Umbau sehr zufrieden: Tut alles wie es soll.
