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replace PCAN API with python-can for Seeed USB to CAN Analyzer

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This commit is contained in:
Yeongdo Park 2021-01-14 04:58:47 +09:00
parent 2688750caf
commit 50c3177585
3 changed files with 78 additions and 55 deletions
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98
Main.py
View file

@ -1,89 +1,89 @@
import Messages
import time
import datetime
import argparse
from argparse import ArgumentParser
import PycanMessages as Messages
from ProcessList import process_list
from WriteToFile import report
from PCANBasic import *
from PCANBasic import TPCANTimestamp, TPCANMsg
#import matplotlib.pyplot as plt
#import numpy as np
parser = argparse.ArgumentParser()
import can
parser: ArgumentParser = argparse.ArgumentParser()
parser.add_argument("-c", "--channel",
help=('The serial device to open. '
'For example "/dev/ttyS1" or "/dev/ttyUSB0" on Linux '
'or "COM1" on Windows systems.'),
required=True)
parser.add_argument("-o", "--output", help="log file name", required=True)
args = parser.parse_args()
can.rc['interface'] = 'seeedstudio'
can.rc['channel'] = args.channel
can.rc['bitrate'] = 500000
id_response = 0x7BB
id_periodic = 0x1DB
id_mask11 = 0x7FF
voltage_filters = [
{"can_id": id_response, "can_mask": id_mask11, "extended": False},
{"can_id": id_periodic, "can_mask": id_mask11, "extended": False},
]
filename = args.output # input("Please Enter a File Name: ")
# Initialize PCAN device and set filter for incoming messages with ID id_response
PCAN = PCANBasic()
res = PCAN.Initialize(PCAN_USBBUS1, PCAN_BAUD_500K)
#PCAN.FilterMessages(PCAN_USBBUS1, id_response, id_response, PCAN_MESSAGE_STANDARD)
# Initialize CAN device and set filter for incoming messages with ID id_response
bus = can.Bus()
bus.set_filters(voltage_filters)
# Infinite loop runs until program is closed
while True:
# Filters messages so we only get cell voltage data
PCAN.Reset(PCAN_USBBUS1)
PCAN.FilterMessages(PCAN_USBBUS1, id_response, id_response, PCAN_MESSAGE_STANDARD)
PCAN.FilterMessages(PCAN_USBBUS1, id_periodic, id_periodic, PCAN_MESSAGE_STANDARD)
# Create empty list for cell voltage message strings
# Each entry in the list is a message containing the voltage information
v = []
# wait 10 seconds to read the cell voltages again
#time.sleep(10)
# For cell voltages we need to request and read 28 additional messages. Each message contains 3 1/2 cell voltages.
for i in range(0, 29):
if i == 0:
# Send message to request cell voltage data
PCAN.Write(PCAN_USBBUS1, Messages.rCellVInit)
bus.send(Messages.rCellVInit)
else:
# Request a new messages
PCAN.Write(PCAN_USBBUS1, Messages.rCellV)
bus.send(Messages.rCellV)
# Wait 18 ms
time.sleep(.014)
# Read the next message
v_message = True
while v_message:
MSG = PCAN.Read(PCAN_USBBUS1)
MSG = MSG[1]
if MSG.ID == id_response:
MSG = bus.recv()
if MSG.arbitration_id == id_response:
v_message = False
# For the remaining voltages, the cell voltage data is contained in bytes 1 - 7
# Concatenate byte strings
s = "".join(map("{0:08b}".format, MSG.DATA[1:8]))
s = "".join(map("{0:08b}".format, MSG.data))
# Append them to the list
v.append(s)
vv = process_list(v)
# Filter messages for pack voltage and current
#PCAN.Reset(PCAN_USBBUS1)
#time.sleep(.005)
#PCAN.FilterMessages(PCAN_USBBUS1, id_periodic, id_periodic, PCAN_MESSAGE_STANDARD)
#time.sleep(.050)
p_message = True
while p_message:
MSG = PCAN.Read(PCAN_USBBUS1)
MSG = MSG[1]
if MSG.ID == id_periodic:
MSG = bus.recv()
if MSG.arbitration_id == id_periodic:
p_message = False
voltage_byte1 = "{0:08b}".format(MSG.DATA[2])
voltage_byte2 = "{0:08b}".format(MSG.DATA[3])
voltage_byte1 = "{0:08b}".format(MSG.data[2])
voltage_byte2 = "{0:08b}".format(MSG.data[3])
pack_voltage_string = voltage_byte1 + voltage_byte2
pack_voltage_string = pack_voltage_string[0:9]
pack_voltage = float(int(pack_voltage_string, 2))
current_byte1 = "{0:08b}".format(MSG.DATA[0])
current_byte2 = "{0:08b}".format(MSG.DATA[1])
current_byte1 = "{0:08b}".format(MSG.data[0])
current_byte2 = "{0:08b}".format(MSG.data[1])
pack_current_string = current_byte1 + current_byte2
pack_current_string = pack_current_string[0:10]
if pack_current_string[0] == 1:
@ -91,35 +91,28 @@ while True:
else:
pack_current = float(int(pack_current_string, 2))
#pack_current = pack_current/2
#PCAN.Reset(PCAN_USBBUS1)
#time.sleep(.005)
#PCAN.FilterMessages(PCAN_USBBUS1, id_response, id_response, PCAN_MESSAGE_STANDARD)
group1_msg = []
for i in range(0, 5):
if i == 0:
PCAN.Write(PCAN_USBBUS1, Messages.request_group1)
bus.send(Messages.request_group1)
else:
PCAN.Write(PCAN_USBBUS1, Messages.request_additional_line)
bus.send(Messages.request_additional_line)
time.sleep(.014)
p_message = True
while p_message:
MSG = PCAN.Read(PCAN_USBBUS1)
MSG = MSG[1]
if MSG.ID == id_response:
MSG = bus.recv()
if MSG.arbitration_id == id_response:
p_message = False
group1_msg.append(MSG)
health_byte1 = "{0:08b}".format(MSG.DATA[2])
health_byte2 = "{0:08b}".format(MSG.DATA[3])
health_byte1 = "{0:08b}".format(MSG.data[2])
health_byte2 = "{0:08b}".format(MSG.data[3])
pack_health_string = health_byte1 + health_byte2
pack_health = float(int(pack_health_string, 2))/100
charge_byte1 = "{0:08b}".format(MSG.DATA[5])
charge_byte2 = "{0:08b}".format(MSG.DATA[6])
charge_byte3 = "{0:08b}".format(MSG.DATA[7])
charge_byte1 = "{0:08b}".format(MSG.data[5])
charge_byte2 = "{0:08b}".format(MSG.data[6])
charge_byte3 = "{0:08b}".format(MSG.data[7])
charge_string = charge_byte1 + charge_byte2 + charge_byte3
pack_charge = float(int(charge_string, 2))/10000
@ -131,4 +124,5 @@ while True:
f.write(report_string)
f.write('\n')
# wait 10 seconds to read the cell voltages again
time.sleep(10)

6
PycanMessages.py Normal file
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@ -0,0 +1,6 @@
from can import Message
rCellVInit = Message(arbitration_id=0x79b, data=[0x02, 0x21, 0x02, 0xff, 0xff, 0xff, 0xff, 0xff])
rCellV = Message(arbitration_id=0x79b, data=[0x30, 0x01, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff])
request_group1 = Message(arbitration_id=0x79b, data=[0x02, 0x21, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff])
request_additional_line = Message(arbitration_id=0x79b, data=[0x30, 0x01, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff])

23
test_seeed.py Normal file
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@ -0,0 +1,23 @@
import time
import datetime
import argparse
from argparse import ArgumentParser
import PycanMessages as Messages
from ProcessList import process_list
from WriteToFile import report
import can
can.rc['interface'] = 'seeedstudio'
can.rc['channel'] = "COM3"
can.rc['operation_mode'] = "loopback"
can.rc['bitrate'] = 500000
bus = can.Bus()
can.Notifier(bus, [can.Printer()])
for i in range(100):
bus.send(Messages.rCellVInit)
time.sleep(1)