Re: [Paparazzi-devel] CANbus driver

[Stephen Dwyer]

Hello,

I don't know of anyone actively working on CAN drivers at the moment, or actually using any existing code. Esden was working on implementing CAN with his OBLDC Strip controllers, and had some success. Sample code for the Lisa/M v2.0 for this is available in the libopencm3 repository. There is also sample code for the obldc strip controller there, for the other side of the CAN comms. If you are going to work on the CAN driver, it is best to work on master branch, as this uses libopencm3, which everything will be migrated to, hopefully sooner rather than later.

It would be great to improve the CAN support in paparazzi!

And yes, Lisa/M runs at 72MHz.

Hope that helps.

Thanks,

-Stephen Dwyer

On Thu, Jan 24, 2013 at 2:37 AM, Miguel Torres <address@hidden> wrote:

Hi

I want to communicate a Lisa/M with these ESC  http://autoquad.org/wiki/wiki/esc32/ through CAN (it has the can controller on the mcu and the layout for a transceiver on the board, but still no code for can communications) and I have been reading through the CAN driver code, and then tried to perform some tests.
Is anyone working on CANbus also? Y have tried both the driver on 4.2 branch (i am using this one for flying) and also the one on master branch, but I haven't got proper communications yet (I am using the microchip can bus analyzer for these tests). The CAN bit timing settings are a bit confusing and I'm not really sure what the CAN clock is to calculate the prescaler value and the bit segments. Lisa/M has a 72MHz clock, right?

I would appreciate some tips if someone is also working on CAN with Lisa/M boards,

Regards,

Miguel Torres

(null)

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