replace PCAN API with python-can for Seeed USB to CAN Analyzer
This commit is contained in:
Yeongdo Park
parent
2688750caf
commit
50c3177585
3 changed files with 78 additions and 55 deletions
104
Main.py
104
Main.py
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@ -1,89 +1,89 @@
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import Messages
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import time
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import datetime
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import argparse
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from argparse import ArgumentParser
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import PycanMessages as Messages
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from ProcessList import process_list
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from WriteToFile import report
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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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parser = argparse.ArgumentParser()
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import can
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parser: ArgumentParser = argparse.ArgumentParser()
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parser.add_argument("-c", "--channel",
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help=('The serial device to open. '
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'For example "/dev/ttyS1" or "/dev/ttyUSB0" on Linux '
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'or "COM1" on Windows systems.'),
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required=True)
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parser.add_argument("-o", "--output", help="log file name", required=True)
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args = parser.parse_args()
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can.rc['interface'] = 'seeedstudio'
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can.rc['channel'] = args.channel
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can.rc['bitrate'] = 500000
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id_response = 0x7BB
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id_periodic = 0x1DB
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filename = args.output # input("Please Enter a File Name: ")
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id_mask11 = 0x7FF
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# Initialize PCAN device and set filter for incoming messages with ID id_response
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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, id_response, id_response, PCAN_MESSAGE_STANDARD)
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voltage_filters = [
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{"can_id": id_response, "can_mask": id_mask11, "extended": False},
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{"can_id": id_periodic, "can_mask": id_mask11, "extended": False},
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]
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filename = args.output # input("Please Enter a File Name: ")
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# Initialize CAN device and set filter for incoming messages with ID id_response
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bus = can.Bus()
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bus.set_filters(voltage_filters)
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# Infinite loop runs until program is closed
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while True:
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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, id_response, id_response, PCAN_MESSAGE_STANDARD)
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PCAN.FilterMessages(PCAN_USBBUS1, id_periodic, id_periodic, 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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# For cell voltages we need to request and read 28 additional messages. Each message contains 3 1/2 cell voltages.
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for i in range(0, 29):
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if i == 0 :
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if i == 0:
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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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bus.send(Messages.rCellVInit)
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else:
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# Request a new messages
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PCAN.Write(PCAN_USBBUS1, Messages.rCellV)
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bus.send(Messages.rCellV)
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# Wait 18 ms
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time.sleep(.014)
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# Read the next message
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v_message = True
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while v_message:
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MSG = PCAN.Read(PCAN_USBBUS1)
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MSG = MSG[1]
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if MSG.ID == id_response:
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MSG = bus.recv()
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if MSG.arbitration_id == id_response:
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v_message = False
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# For the remaining voltages, the cell voltage data is contained in bytes 1 - 7
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# Concatenate byte strings
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s = "".join(map("{0:08b}".format, MSG.DATA[1:8]))
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s = "".join(map("{0:08b}".format, MSG.data))
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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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# 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, id_periodic, id_periodic, PCAN_MESSAGE_STANDARD)
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#time.sleep(.050)
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p_message = True
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while p_message:
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MSG = PCAN.Read(PCAN_USBBUS1)
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MSG = MSG[1]
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if MSG.ID == id_periodic:
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MSG = bus.recv()
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if MSG.arbitration_id == id_periodic:
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p_message = False
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voltage_byte1 = "{0:08b}".format(MSG.DATA[2])
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voltage_byte2 = "{0:08b}".format(MSG.DATA[3])
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voltage_byte1 = "{0:08b}".format(MSG.data[2])
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voltage_byte2 = "{0:08b}".format(MSG.data[3])
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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 = "{0:08b}".format(MSG.DATA[0])
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current_byte2 = "{0:08b}".format(MSG.DATA[1])
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current_byte1 = "{0:08b}".format(MSG.data[0])
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current_byte2 = "{0:08b}".format(MSG.data[1])
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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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@ -91,44 +91,38 @@ while True:
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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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#PCAN.Reset(PCAN_USBBUS1)
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#time.sleep(.005)
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#PCAN.FilterMessages(PCAN_USBBUS1, id_response, id_response, PCAN_MESSAGE_STANDARD)
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group1_msg = []
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for i in range(0, 5):
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if i == 0:
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PCAN.Write(PCAN_USBBUS1, Messages.request_group1)
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bus.send(Messages.request_group1)
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else:
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PCAN.Write(PCAN_USBBUS1, Messages.request_additional_line)
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bus.send(Messages.request_additional_line)
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time.sleep(.014)
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p_message = True
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while p_message:
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MSG = PCAN.Read(PCAN_USBBUS1)
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MSG = MSG[1]
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if MSG.ID == id_response:
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MSG = bus.recv()
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if MSG.arbitration_id == id_response:
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p_message = False
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group1_msg.append(MSG)
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health_byte1 = "{0:08b}".format(MSG.DATA[2])
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health_byte2 = "{0:08b}".format(MSG.DATA[3])
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health_byte1 = "{0:08b}".format(MSG.data[2])
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health_byte2 = "{0:08b}".format(MSG.data[3])
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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 = "{0:08b}".format(MSG.DATA[5])
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charge_byte2 = "{0:08b}".format(MSG.DATA[6])
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charge_byte3 = "{0:08b}".format(MSG.DATA[7])
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charge_byte1 = "{0:08b}".format(MSG.data[5])
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charge_byte2 = "{0:08b}".format(MSG.data[6])
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charge_byte3 = "{0:08b}".format(MSG.data[7])
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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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tnow = datetime.datetime.now()
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report_string = report(vv, pack_voltage, pack_current, pack_health, pack_charge, tnow.ctime())
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print (report_string)
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print(report_string)
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with open(filename, "a") as f:
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f.write(report_string)
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f.write('\n')
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# wait 10 seconds to read the cell voltages again
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time.sleep(10)
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6
PycanMessages.py
Normal file
6
PycanMessages.py
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@ -0,0 +1,6 @@
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from can import Message
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rCellVInit = Message(arbitration_id=0x79b, data=[0x02, 0x21, 0x02, 0xff, 0xff, 0xff, 0xff, 0xff])
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rCellV = Message(arbitration_id=0x79b, data=[0x30, 0x01, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff])
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request_group1 = Message(arbitration_id=0x79b, data=[0x02, 0x21, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff])
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request_additional_line = Message(arbitration_id=0x79b, data=[0x30, 0x01, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff])
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23
test_seeed.py
Normal file
23
test_seeed.py
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@ -0,0 +1,23 @@
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import time
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import datetime
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import argparse
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from argparse import ArgumentParser
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import PycanMessages as Messages
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from ProcessList import process_list
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from WriteToFile import report
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import can
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can.rc['interface'] = 'seeedstudio'
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can.rc['channel'] = "COM3"
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can.rc['operation_mode'] = "loopback"
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can.rc['bitrate'] = 500000
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bus = can.Bus()
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can.Notifier(bus, [can.Printer()])
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for i in range(100):
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bus.send(Messages.rCellVInit)
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time.sleep(1)
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