bus speeds

[rwbruce]

Greetings,

I have two USB/CAN devices connected to a Linux system. /proc/pcan shows devices can0 and can1. can0 must operate at 1-M bit rate and can1 must operate at 250-K bit rate. I passed option bitrate=0x0014 to the driver, so I am able to prove that the software and hardware are functional at 1-M bit rate using can0. I assume this sets both devices to the same rate. How do I set the devices at different rates?

Thanks.
Bill Bruce
Watlow Controls
Winona, MN, USA

[M.Maidhof]

Hi,

please see our linux driver manual in pdf format on page 22:

example:

echo "i 0x0014 e" > /dev/pcan32

echo "i 0x011C e" > /dev/pcan33

You have to use the chardev devices to set the baudrate of the used Netdev devices.

regards

Michael

[rwbruce]

OK. Thanks for the reply.

Bill Bruce

[rwbruce]

Michael,

echo "i 0x0014 e" > /dev/pcan32

echo "i 0x011C e" > /dev/pcan33

----

Am I correct that the 'e' at the end of these strings places the device in 29-bit address mode?

If can0 is 1-M, 11-bit address and can1 is 250-K, 29-bit address, would the commands be as follows?

echo "i 0x0014 s" > /dev/pcan32

echo "i 0x011C e" > /dev/pcan33

I'm looking at the table on page 32 of the manual.

Thanks.
Bill Bruce

[M.Maidhof]

Hi Bruce,

when you use 11Bit "standard" CAN frames you can just omit the "e" option.

echo "i 0x0014" > /dev/pcan32

echo "i 0x011C e" > /dev/pcan33

regards

Michael