Energia can example

[Davidwallis 0]

Does anyone have a can bus example for energia that works with the tm4c123g?

 

Thanks

 

David

[Rei Vilo 695]

See chapter 6 of the http://www.ti.com/lit/ug/spmu298d/spmu298d.pdf'>TivaWareTM Peripheral Driver Library USER

[Davidwallis 0]

Hi,

 

I got the example working to some extent, but ended up using code composer - so mods feel free to move this if needed. Few questions on the RX example..

 

How do I add interrupt vectors?

 

Initally I have got it triggering on can messages by enabling:

 

CANIntRegister(CAN0_BASE, CANIntHandler); // if using dynamic vectors

 

I have set the msgID as:

 

sCANMessage.ui32MsgID = 0x600;

 

and have tried all sorts of masks.. from 0 to 0xffff etc - Just not sure how to set this?

 

sCANMessage.ui32MsgIDMask = 0xfff;

 

In this scenario I am running at 1Mbps and have configured the baud rate accordingly - the bus is very busy currently.. but using another product and tool I can see the message being sent as:

 

CAN id 600

Length 8

DATA 00 00 00 00 34 61 00

 

However I see no data from the example.. what simple thing am I doing wrong??

[energia 485]

Attached are 2 Sketches that might help you. 

dph_CANExamplePolled.ino

dph_CANExampleWithInterrupts.ino

[Davidwallis 0]

Thanks,

 

I eventually got the code working with a peer review from a friend, who couldn't see anything wrong, he built it on his machine and then sent the bin which I flashed and it all worked ok.. Downgrading tivaware on my machine and rebuilding it - it then worked.. Need to have another play with this tonight..

 

Next problem was I was loosing messages - Don't know if I need to use more slots and fifo to cope with the volume of messages (@ 1Mbps) ?