PEAK CAN USB Device not Connectable

[Torsten Robitzki]

Hello,
I have a small application that utilizes a PEAK CAN USB adapter to communicate with a Bootloader on a embedded device. The small application works flawless with the very same adapter with the very same cable setup on a MacBook (and I know of customers who used the same application on windows).

Now, I try to port the application to Linux. I run a Ubuntu in VMWare virtual machine:

uname -a
Linux ubuntu 5.15.0-46-generic #49~20.04.1-Ubuntu SMP Thu Aug 4 19:15:44 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

The required drivers seem to be preinstalled with the OS, as promised:

$ grep PEAK_ /boot/config-`uname -r`
CONFIG_CAN_PEAK_PCIEFD=m
CONFIG_CAN_PEAK_PCI=m
CONFIG_CAN_PEAK_PCIEC=y
CONFIG_CAN_PEAK_PCMCIA=m
CONFIG_CAN_PEAK_USB=m

And the CAN device seems to be initialized:

$ lsmod | grep ^peak
peak_usb 53248 0

The CAN device is poweres (see attached foto). But, when calling `CAN_Initialize()` in the application, it fails:

Tue Aug 16 00:12:14 2022 - «____________________________________»
Tue Aug 16 00:12:14 2022 - « PCAN-Basic Log »
Tue Aug 16 00:12:14 2022 - « API v4.6.1.32 »
Tue Aug 16 00:12:14 2022 - «____________________________________»
Tue Aug 16 00:12:14 2022 - PCAN Library Logging Enabled.
Tue Aug 16 00:12:14 2022 - EXIT 'CAN_SetValue' - RESULT: 0x00
Tue Aug 16 00:12:14 2022 - ENTRY 'CAN_Initialize'
Tue Aug 16 00:12:14 2022 - PARAMETERS of CAN_Initialize: Channel: 0x51, Btr0Btr1: 28, HwType: 0x00000000, IOPort: 0x00000000, Interrupt: 0x00000000
Tue Aug 16 00:12:14 2022 - EXIT 'CAN_Initialize' - RESULT: 0x1400
Tue Aug 16 00:12:14 2022 - «____________________________________»
Tue Aug 16 00:12:14 2022 - « ############ »
Tue Aug 16 00:12:14 2022 - «____________________________________»

The pcanbasic_dbg.log:

0000013646.756597: Initializing PCAN-Basic API...
0000013646.756648: Refreshing hardware device list...
0000013646.756669: ERROR: failed to scan directory (errno=2) '/sys/class/pcan'
0000013646.756674: Found 0 devices in '/sys/class/pcan'
0000013646.756686: ERROR: failed to open file (errno=2) '/sys/class/pcan/version'.
0000013646.772595: Cleaning up PCAN-Basic API...

Here the result of `cat /proc/pcan`

$ cat /proc/pcan
cat: /proc/pcan: No such file or directory

When I connect the CAN device to the host machine of the VM, VMWare asks me if I want to connect the CAN device to the VM and I agree to it (see attached picture).

What could be the problem here? What further investigations do I have to make? Is Ubunut even supported by PEAK?

best regards,

Torsten

USB Device powered

tempImageo04ZXL.gif (3.34 MiB) Viewed 7817 times

USB Device Recognized by VMWare

Bildschirmfoto 2022-08-15 um 21.20.31.jpeg (91.76 KiB) Viewed 7817 times

[Torsten Robitzki]

Maybe this additional information is helpful:

$ sudo modprobe pcan
modprobe: FATAL: Module pcan not found in directory /lib/modules/5.15.0-46-generic

$ ls /sys/class/pcan
ls: cannot access '/sys/class/pcan': No such file or directory

[M.Maidhof]

Hi,

the PCANBasic API can't use the SocketCAN driver of the kernel. You have to install the peak-linux-driver-8.xx in chardev mode. Please see info on our Linux driver website for more details:

http://www.peak-system.com/fileadmin/me ... /index.htm

regards

Michael

[Torsten Robitzki]

Hello Michael,

that are bad news! What are my alternatives, if I want to have a very small tool, using your CAN USB adapter and also using the promised feature, that no additional driver installation is required? Which API do I have to program against? What is the point of the PCANBasic API?

thanks in advance,

Torsten

[M.Maidhof]

Hi,

please use the kernel SocketCAN driver, if you don't want to use the peak-linux-driver. Download the can-utils to see how you can program apps for the NetDev interface or have a look here for more details:

https://www.kernel.org/doc/Documentatio ... ng/can.txt

Looks like you didn't read the info we have linked on our Linux website.....

regards

Michael

[Torsten Robitzki]

Looks like you didn't read the info we have linked on our Linux website.....

Well, if you look under Support/Development, you can get the impression that PCAN-Basic API is the way to go. Even if you further visit the drivers/linux page, the first information available is, that there is no need to install any drivers.

Of cause, you are right: If you start developing for your devices by looking for Linux drivers and read the "Driver Package for Proprietary Purposes" chapter carefully, you will find out, that PCAN-Basic API is probably not the best way to go and that you have to better write your application twice.

SocketCAN not even mentioned

Bildschirmfoto 2022-08-16 um 14.34.43.png (1.16 MiB) Viewed 7789 times

[M.Maidhof]

Yes, reading the info will help in that matter

regards

Michael.