TMS320F2812: Can mailbox does not work in ECAN mode

Due to holidays, you can expect a response by first week of January.

Brian,

            (I am certain I have responded to a similar issue before on e2e). I can think of two possibilities:

1. Something is wrong with that particular device, causing this intermittent behavior
2. There is some weakness in the code (for example, not performing 32-bit R/W) that is manifesting as an intermittent problem. i.e. if you try sufficient number of times, you may see this in other boards as well. 

Please have customer look the debug checklist in my app.report: http://www.ti.com/lit/an/spra876b/spra876b.pdf 

Is this a new design or has this product been in production for a while?

Hi Hareesh,

Happy holiday!

32-bit R/W have also came into my mind. Currently, customer is struct to read CANRMP register by bit to indicate a frame has been received.

I would like to know if customer use xxx.bit to read a register, is C2000 read the 32bit and then return a bit or it just read a single bit?

So you are suggesting customer to read the whole CANRMP register, and then use AND logic to check the status of a CANRMP bit?

Regards,

Brian

Hareesh,

Thanks!