from the laptop
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Yeongdo Park
parent
3ddaf455e3
commit
becc97f6c7
3 changed files with 158 additions and 15 deletions
141
Main.py
141
Main.py
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@ -3,31 +3,41 @@ import time
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from ProcessList import process_list
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from PCANBasic import *
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from PCANBasic import TPCANTimestamp, TPCANMsg
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import matplotlib.pyplot as plt
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import numpy as np
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#import matplotlib.pyplot as plt
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#import numpy as np
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# Initialize PCAN device and set filter for incoming messages with ID 1979
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PCAN = PCANBasic()
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res = PCAN.Initialize(PCAN_USBBUS1, PCAN_BAUD_500K)
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PCAN.FilterMessages(PCAN_USBBUS1, 1979, 1979, PCAN_MESSAGE_STANDARD)
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#PCAN.FilterMessages(PCAN_USBBUS1, 1979, 1979, PCAN_MESSAGE_STANDARD)
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filename = input("Please Enter a File Name: ")
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# Infinite loop runs until program is closed
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while True:
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print("new")
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# Filters messages so we only get cell voltage data
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PCAN.Reset(PCAN_USBBUS1)
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PCAN.FilterMessages(PCAN_USBBUS1, 1979, 1979, PCAN_MESSAGE_STANDARD)
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PCAN.FilterMessages(PCAN_USBBUS1, 475, 475, PCAN_MESSAGE_STANDARD)
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# Create empty list for cell voltage message strings
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# Each entry in the list is a message containing the voltage information
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v = []
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# wait 10 seconds to read the cell voltages again
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time.sleep(10)
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#time.sleep(10)
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# Send message to request cell voltage data
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PCAN.Write(PCAN_USBBUS1, Messages.rCellVInit)
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# pause
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time.sleep(.018)
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time.sleep(.014)
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# Read the first message
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MSG = PCAN.Read(PCAN_USBBUS1)
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v_message = 0
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while v_message != 1:
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MSG = PCAN.Read(PCAN_USBBUS1)
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MSG = MSG[1]
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if MSG.ID == 1979:
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v_message = 1
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# MSG[1] is the data we are requesting
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MSG = MSG[1]
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#MSG = MSG[1]
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# Bytes 4, 5, 6, and 7 store the first two cell voltages
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# For each byte we need to create a binary string and make sure they are 8 bits long
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s4 = "{0:b}".format(MSG.DATA[4])
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@ -52,10 +62,14 @@ while True:
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# Request a new messages
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PCAN.Write(PCAN_USBBUS1, Messages.rCellV)
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# Wait 18 ms
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time.sleep(.18)
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time.sleep(.014)
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# Read the next message
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MSG = PCAN.Read(PCAN_USBBUS1)
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MSG = MSG[1]
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v_message = 0
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while v_message != 1:
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MSG = PCAN.Read(PCAN_USBBUS1)
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MSG = MSG[1]
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if MSG.ID == 1979:
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v_message = 1
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# For the remaining voltages, the cell voltage data is contained in bytes 1 - 7
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s1 = "{0:b}".format(int(MSG.DATA[1]))
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while len(s1) != 8:
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@ -83,4 +97,107 @@ while True:
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# Append them to the list
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v.append(s)
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vv = process_list(v)
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vv = process_list(v)
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for i in range(0, 48):
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print("Cell " + str(i+1) + " = %.3f" % vv[i] + "\t\t\tCell " + str(i + 49) + " = %.3f" % vv[i+48])
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with open(filename, "a") as f:
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f.write("\nCell " + str(i+1) + " = %.3f" % vv[i] + "\t\t\tCell " + str(i + 49) + " = %.3f" % vv[i+48])
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print("Cell Voltage Sum = %.2f" % sum(vv))
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with open(filename, "a") as f:
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f.write("\nCell Voltage Sum = %.2f" % sum(vv))
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# Filter messages for pack voltage and current
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#PCAN.Reset(PCAN_USBBUS1)
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#time.sleep(.005)
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#PCAN.FilterMessages(PCAN_USBBUS1, 475, 475, PCAN_MESSAGE_STANDARD)
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#time.sleep(.050)
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p_message = 0
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while p_message != 1:
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MSG = PCAN.Read(PCAN_USBBUS1)
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MSG = MSG[1]
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if MSG.ID == 475:
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p_message = 1
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voltage_byte1 = "{0:b}".format(MSG.DATA[2])
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while len(voltage_byte1) != 8:
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voltage_byte1 = "0" + voltage_byte1
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voltage_byte2 = "{0:b}".format(MSG.DATA[3])
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while len(voltage_byte2) != 8:
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voltage_byte2 = "0" + voltage_byte2
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pack_voltage_string = voltage_byte1 + voltage_byte2
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pack_voltage_string = pack_voltage_string[0:9]
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pack_voltage = float(int(pack_voltage_string, 2))
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current_byte1 = "{0:b}".format(MSG.DATA[0])
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while len(current_byte1) != 8:
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current_byte1 = "0" + current_byte1
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current_byte2 = "{0:b}".format(MSG.DATA[1])
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while len(current_byte2) != 8:
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current_byte2 = "0" + current_byte2
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pack_current_string = current_byte1 + current_byte2
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pack_current_string = pack_current_string[0:10]
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if pack_current_string[0] == 1:
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pack_current = ~int(pack_current_string, 2) + 1
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else:
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pack_current = float(int(pack_current_string, 2))
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#pack_current = pack_current/2
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print("Pack Voltage = %.2f V" % pack_voltage)
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with open(filename, "a") as f:
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f.write("\nPack Voltage = %.2f V" % pack_voltage)
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print("Pack Current = %.2f A" % pack_current)
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with open(filename, "a") as f:
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f.write("\nPack Current = %.2f A" % pack_current)
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#PCAN.Reset(PCAN_USBBUS1)
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#time.sleep(.005)
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#PCAN.FilterMessages(PCAN_USBBUS1, 1979, 1979, PCAN_MESSAGE_STANDARD)
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PCAN.Write(PCAN_USBBUS1, Messages.request_group1)
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time.sleep(.014)
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p_message = 0
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while p_message != 1:
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MSG = PCAN.Read(PCAN_USBBUS1)
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MSG = MSG[1]
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if MSG.ID == 1979:
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p_message = 1
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for i in range(0, 4):
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PCAN.Write(PCAN_USBBUS1, Messages.request_additional_line)
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time.sleep(.014)
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p_message = 0
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while p_message != 1:
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MSG = PCAN.Read(PCAN_USBBUS1)
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MSG = MSG[1]
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if MSG.ID == 1979:
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p_message = 1
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health_byte1 = "{0:b}".format(MSG.DATA[2])
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health_byte2 = "{0:b}".format(MSG.DATA[3])
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while len(health_byte1) != 8:
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health_byte1 = "0" + health_byte1
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while len(health_byte2) != 8:
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health_byte2 = "0" + health_byte2
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pack_health_string = health_byte1 + health_byte2
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pack_health = float(int(pack_health_string, 2))/100
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charge_byte1 = "{0:b}".format(MSG.DATA[5])
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charge_byte2 = "{0:b}".format(MSG.DATA[6])
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charge_byte3 = "{0:b}".format(MSG.DATA[7])
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while len(charge_byte1) != 8:
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charge_byte1 = "0" + charge_byte1
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while len(charge_byte2) != 8:
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charge_byte2 = "0" + charge_byte2
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while len(charge_byte3) != 8:
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charge_byte3 = "0" + charge_byte3
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charge_string = charge_byte1 + charge_byte2 + charge_byte3
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pack_charge = float(int(charge_string, 2))/10000
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print("State of Health = %.2f %%" % pack_health)
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with open(filename, "a") as f:
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f.write("\nState of Health = %.2f %%" % pack_health)
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print("State of Charge = %.2f %%" % pack_charge)
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with open(filename, "a") as f:
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f.write("\nState of Charge = %.2f %%" % pack_charge)
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time.sleep(10)
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26
Messages.py
26
Messages.py
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@ -27,3 +27,29 @@ rCellV.DATA[4] = 0xff
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rCellV.DATA[5] = 0xff
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rCellV.DATA[6] = 0xff
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rCellV.DATA[7] = 0xff
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request_group1 = TPCANMsg()
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request_group1.ID = 0x79b
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request_group1.MSGTYPE = 0x00
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request_group1.LEN = 8
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request_group1.DATA[0] = 0x02
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request_group1.DATA[1] = 0x21
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request_group1.DATA[2] = 0x01
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request_group1.DATA[3] = 0xff
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request_group1.DATA[4] = 0xff
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request_group1.DATA[5] = 0xff
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request_group1.DATA[6] = 0xff
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request_group1.DATA[7] = 0xff
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request_additional_line = TPCANMsg()
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request_additional_line.ID = 0x79b
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request_additional_line.MSGTYPE = 0x00
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request_additional_line.LEN = 8
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request_additional_line.DATA[0] = 0x30
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request_additional_line.DATA[1] = 0x01
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request_additional_line.DATA[2] = 0x00
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request_additional_line.DATA[3] = 0xff
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request_additional_line.DATA[4] = 0xff
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request_additional_line.DATA[5] = 0xff
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request_additional_line.DATA[6] = 0xff
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request_additional_line.DATA[7] = 0xff
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@ -11,11 +11,11 @@ def process_list(v):
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v_string = v_string + temp
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# Create an empty list to store the voltage of each cell
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voltages = [0.0] * 97
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for i in range(0, 97):
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for i in range(0, 96):
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# Each cell has a 16 bit value. Extract the next 16 bits and convert it into a float
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voltages[i] = float(int(v_string[(i*16):(i*16+16)], 2))
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# Divide by 1000 to get the final value
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voltages[i] = voltages[i]/10000
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voltages[i] = voltages[i]/1000
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# Print the voltage of the cell to the console
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print("Cell " + str(i+1) + " = %.3f" % voltages[i])
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#print("Cell " + str(i+1) + " = %.3f" % voltages[i])
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return voltages
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