XNET CAN DBC read issue

[milan87]

Hello,

just trying to read CAN DBC database file with XNET.

Everything seams to work fine, except one thing.

Start bit is not reed correctly.

According BDC file, for signal for example CheckSum, start bit should be 7.

Instead of 7, start bit for this signal is 0.

All other values for this signal are ok.

Also other signals have same error.

Not sure what is happening. Can someone advise?

Unfortunatelly i can't froward BDC file.

Thanks.

[GerdW · Accepted solution]

Hi milan,

this looks like the Intel vs. Motorola notation convention for CAN DBC files!

In your DBC file you see the last bit of the signal, while the XNet image shows the start bit of the signal…

[Hooovahh]

Also I'd recommend viewing your database in the XNet Database Editor.  It should be in your start menu if you installed XNet.  From there you can look at the frame in a database, and the signals in it.  This tool isn't as good at editing some aspects of a DBC as other tools.  But it does have a great visualization of the bit packing within a frame and can clearly show you where the signal's bits are.  Here is a blog post talking about the signal API and shows the Database Editor.