USB2CAN adapters

USB2CAN adapters

[kay Cee]

Has anyone had success with the usb2can adapter made by siliconlabs?
Also, is it the type of device I can use slcand..... /dev/ttyUSBx with?

Sent from my iPhone

Re: USB2CAN adapters

[Oliver Hartkopp]

SocketCAN supported hardware bot says: What?

Just buy some supported USB hardware or a BeagleboneBlack we talked 
about in our last discussion on April 5th.

You provide no URL to the silicon labs hw and you again stick on that 
slcan stuff. Do you really expect anyone to google that hardware for you 
to provide a free-of-charge hardware compatibility service?

On 04/26/2016 03:35 AM, kay Cee wrote:
>
> Has anyone had success with the usb2can adapter made by siliconlabs?
> Also, is it the type of device I can use slcand..... /dev/ttyUSBx with?
>
> Sent from my iPhone
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Re: USB2CAN adapters

[Oliver Hartkopp]

On 04/27/2016 05:02 AM, kay Cee wrote:
> You're right, I should've sent more specific info.
>
> I have A beaglebone black and a usbcan adapter ------->>>>>
> http://m.aliexpress.com/item-desc/1443071907.html
>
> And I'm sure if I should be using the slcan protocol to make it work or if i can
> Set it up as a regular can device even though it connects to a USB port?
>

There are numerous chinese USB2CAN adapters you can find with entering 
'usb can adapter' at Ebay, e.g. this one:

http://www.ebay.de/itm/USB-CAN-USB-to-CAN-BUS-Converter-Adapter-USB-Cable-support-win7-System-/361538969224

All these adapters come with some WinXP or Win7 drivers, libraries and 
applications that usually do not tell anything about the protocol on the 
serial/USB link.

Checking the example above the driver.rar package contained a PDF with

USB (Serial port) to CAN protocol defines

Serial port 1228800bps
8 data bit
1 stop bit
No parity

Default baud rate of CAN:250kbsp

Send and receive data packet format

No.	Definition	Remark
0	Packet header	0xaa
1	Packet header	0x55
2	Type		0x01- Transmitting and receiving data
3	Frame type	0x01- Standard frame,0x02- Extended frame
4	Frame format	0x01-ata frame,0x02- Remote Frame
5	Frame ID data 1	1~8bit
6	Frame ID data 2	9~16bit
7	Frame ID data 3	17~24bit
8	Frame ID data 4	25~32bit
9	Length	To send or receive data length of CAN bus(0~8)
10	Data 1	CAN send or receive data 1
11	Data 2	CAN send or receive data 2
12	Data 3	CAN send or receive data 3
13	Data 4	CAN send or receive data 4
14	Data 5	CAN send or receive data 5
15	Data 6	CAN send or receive data 6
16	Data 7	CAN send or receive data 7
17	Data 8	CAN send or receive data 8
18	Reserve	0
19	Check	Red part of the data accumulation and checksum

So this is far away from slcan and we don't know details about the 
checksum either.

Oliver