Multiple connections to PCAN bus

[stefanhoelzl]

Hello,

is it possible to open multiple connection to a PCAN bus?

When I have established a connection with python-can, it is still possible to connect with PCAN View (not being able to change bitrates), so generallly it is possible.

Thanks!

[christiansandberg]

I’m not too familiar with the API, but it could be that if the CAN_Initialize call fails (perhaps with some specific error code) we could just keep on going. If you can test that it would be helpful as we can’t test ourselves.

[stefanhoelzl]

Looks like opening multiple connections is only supported by PCAN Developer not PCAN-Basic

https://www.peak-system.com/PCAN-Developer-4.461.0.html?&L=1&sword_list%5B0%5D=nets
One or multiple Clients can be connected with a Net

[milhead2]

I've been looking at the PCAN_BASIC documentation and it shows examples of opening channels of PCAN_USBBUS1 thru PCAN_SUBBUS16 on a single PCAN_USB device.

[tigershadowclaw]

@stefanhoelzl is correct. PCAN-Basic only allows one program at a time to connect to a PCAN device channel. PEAK make several PCAN-USB devices with multiple channels on them. PCAN-View can still be used to open a channel because it uses the PCAN-Developer API not the PCAN-Basic API

[tinix84]

@stefanhoelzl is correct. PCAN-Basic only allows one program at a time to connect to a PCAN device channel. PEAK make several PCAN-USB devices with multiple channels on them. PCAN-View can still be used to open a channel because it uses the PCAN-Developer API not the PCAN-Basic API

can you show me how? Im not able to manage it
I have first PCANview in listen-mode on brusa_net_HW16, then I launch python program
but this give me
Exception has occurred: PcanError
The PCAN-Hardware is already being used by a PCAN-Net