[Ovmsdev] Twizy / 500 kbps CAN lockups

Michael Balzer dexter at expeedo.de
Sat Nov 3 03:54:03 HKT 2012

During my tests I had two times some sort of a CAN lockup, i.e. 
everything worked except the CAN reception -- was fixed by switching the 
car off + on.

I'm not sure yet what caused that, it (of course) did not happen again 
since I included a first debug output of the RXERRCNT...

I saw the 1 mbps setup does not follow the intrepid timing calculator 
standard parameters but increases prop delay from 1 to 3 and decreases 
phase 1 from 5 to 3.

A similar change to the 500 kbps parameters though did not work with the 

Do you have any hints on debugging this?

My current setup for 500 kbps is:

     // 500 kbps -- tool recommendation + multisampling:
     BRGCON1 = 0x00;
     BRGCON2 = 0xFA;
     BRGCON3 = 0x07;


Michael Balzer * Paradestr. 8 * D-42107 Wuppertal
Fon 0202 / 272 2201 * Handy 0176 / 206 989 26

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