8-bit MicrocontrollersのトピックRe: CAN sample code

CAN sample code

bilg — Wed, 01 Nov 2006 09:09:00 GMT

I am hoping that someone has already done some example code for the CAN bus on an 8 bit, e.g.

908GZ60, and would be willing to share it.

Just something simple, but which contains all the reg setup stuff, to save some time. I would like to hook up an eval board DEMO908GZ60 to an existing CAN bus and see how it plays.

thanks

bilg

Re: CAN sample code

Limes — Fri, 17 Nov 2006 01:08:06 GMT

That's a good question. I'm looking also for a CAN sample code for my GZ.

If somebody has some code, please make him public.

Thanks a lot

Re: CAN sample code

bilg — Fri, 17 Nov 2006 04:18:07 GMT

there is an app note AN3034 and software which may help

Re: CAN sample code

Limes — Fri, 17 Nov 2006 19:33:14 GMT

Yes I know this app note but it is for a hcs12 and I have a hc08.

I'm using a MCP2551 can transceiver, but it does not work as I want it.

Which transceiver are you using?

Re: CAN sample code

bilg — Fri, 17 Nov 2006 21:09:36 GMT

I have the demo board DEMO908GZ60 which uses a TJA1054. I only know of the app note, I haven't gone through it yet,... nor can I speak for the board. But I would be interested if you want to continue the conversation, maybe off line would be more responsive.

Re: CAN sample code

Limes — Fri, 17 Nov 2006 23:05:52 GMT

Why do I send Message 3 and not Message 1?

while(CTFLG_TXE0 != 0x01){
}

IDR00 = 0x00;     //00000000
IDR10 = 0x18;     //00001000
IDR20 = 0x04;     //00000100
IDR30 = 0x41;     //01000000
DSR00 = 0x12;     //00010010
DSR10 = 0x34;     //00110100
DSR20 = 0x56;     //01010110
DSR30 = 0x78;     //01111000
DSR40 = 0x9a;     //10011010
DSR50 = 0x00;
DSR60 = 0x00;
DSR70 = 0x00;
DLR0 = 0x08;
TBPR0 = 0x00;

  while(CTFLG_TXE1 != 0x01){
}

IDR01 = 0x00;     //00000000
IDR11 = 0x18;     //00001000
IDR21 = 0x04;     //00000100
IDR31 = 0x41;     //01000001
DSR01 = 0x12;     //00010010
DSR11 = 0x34;     //00110100
DSR21 = 0x56;     //01010110
DSR31 = 0x78;     //01111000
DSR41 = 0x9a;     //10011010
DSR51 = 0x00;
DSR61 = 0x00;
DSR71 = 0x00;
DLR1 = 0x08;
TBPR1 = 0x02;

  while(CTFLG_TXE2 != 0x01){
}

IDR02 = 0x00;     //00000000
IDR12 = 0x18;     //00001000
IDR22 = 0x04;     //00000100
IDR32 = 0x40;     //01000001
DSR02 = 0x12;     //00010010
DSR12 = 0x34;     //00110100
DSR22 = 0x56;     //01010110
DSR32 = 0x78;     //01111000
DSR42 = 0x9a;     //10011010
DSR52 = 0x00;
DSR62 = 0x00;
DSR72 = 0x00;
DLR2 = 0x05;
TBPR2 = 0x04;

CTFLG_TXE0 = 0x00;

On the CAN-Bus Monitor Message 3 is show but why? I set the TXE0 to 0 TXE3 should be stay high. Were is the mistake? Has anyone had equal problems?

thanks