DCAN Loopback TMS570LS3137

Hi Alan,

The link you embedded is broken, would you please post it again?

Hi, i've fixed the link, it appended the text of the hyperlink....

Thanks Alan,

I haven't had a chance to try the code yet, might need to get Haixiao...

But quick look at it - your first question is related to the parameter messageBox in the function canIsRxMessage arrived - correct?

I don't see why messageBox would be related to the extended identifier use or not - message box is a block of RAM in the DCAN's message RAM that is programmed to match a can bus message.   So whether or not that message RAM entry is configured to use the extended address - I don't think matters as far as the status of this message goes. 

Am I off-base on the original question?

EDIT:  also back to the original question - I understand that you can't get this project to work is that right?  Which hardware platform / device are you trying, and have you made any mods to the project?

Also do you have any connections made to the can bus even if it's just jumpering the two CAN bus connectors on the HDK together?

Hi,

I've continued trying other setups and it looks like CAN is not functioning properly, I'm not sure if i have missed something, I've simplified as much as I can.  I'm using the TMS570LS31HDK.

My halcogen file is attached, in the main function I have the following

    _enable_IRQ();
    vimInit();
    canInit();

    canTransmit(canREG1, canMESSAGE_BOX1, tx_data);
    while(!canIsRxMessageArrived(canREG2, canMESSAGE_BOX1));
    canGetData(canREG2, canMESSAGE_BOX1, rx_data);

I have attached CAN1 H to CAN2 H and CAN1 L to CAN2 L

What am i missing?

Alan

2727.PIF_DCAN.zip

5008.can.c

Alan,

I tried to build based on what you posted in the previous message, but I'm missing the definition of rx_data and tx_data.

It would be great if you could attach your entire main file - in case there's anything else.  I pasted the code from the message into the body of sys_main.c and added #includes for can.h and vim.h but that didn't take care of rx_data and tx_data.

Hi,

here is a zip file with the whole code

Alan

5822.Copy of PIF_DCAN.zip