Amateur trying to use 2-CHANNEL-CAN-BUS-FD Shield

Products & Technology Raspberry Pi
#1

Hello! I’m trying to use the CAN-BUS shield to control some BLDC motors but I can’t get the motors to receive data. I’m using the template code provided at: https://wiki.seeedstudio.com/2-Channel-CAN-BUS-FD-Shield-for-Raspberry-Pi/
import time
import can

bustype = ‘socketcan_native’
channel = ‘can0’

def producer(id):
“”":param id: Spam the bus with messages including the data id."""
bus = can.interface.Bus(channel=channel, bustype=bustype)
for i in range(10):
msg = can.Message(arbitration_id=0x141, data=[0xA6, 0x00,0x02,0x02, 35999, 35999>>8,0x00,0x00], extended_id=False)
bus.send(msg)
# Issue #3: Need to keep running to ensure the writing threads stay alive. ?
time.sleep(1)

producer(10)

The motor I’m trying to run has an ID of 0x141 and some of the commands I wish to send in order to make the motor move are:
0xA6, 0x00,0x02,0x02, 35999, 35999>>8,0x00,0x00
I realize that the data input only takes up to 255 input and so I get an error.
How should I resolve this issue and is the code I’ve written even the right way to go about it?
Kindly from Simon. Thank you for your time.

#2

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image922×391 54.1 KB

This is from the data sheet on position control.

#3

@Simo8471 I never test BLDC motors , but you need set the right rate and protocol first.

#4

Ye me neither haha. I’ll look into the protocols and BAUD rate. Would you know of any good examples online that make use of the can-bus shield to control external components? I’m also a bit unsure on the Arbitration ID, I’ve tried reading the documentation but I’m not exactly sure if the ID of the motor goes in the arbitration ID or if I need to put it in the data package, would you know? And thanks for getting back to me!

#5

Forgot to tag you @Baozhu