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Can't make CAN to recieve messages : AT91SAM7X
http://www.at91.com/samphpbb/viewtopic.php?f=15&t=3439		 Page 2 of 2
Author:  GSNT [ Sat Jul 07, 2007 6:13 pm ]
Post subject: 
BTW:

just try to transmit a message(without ints) and scope your hardware:


Code:
//set transmit mailbox
//mailbox 1 transmission low byte first
AT91C_BASE_CAN->CAN_MB1.CAN_MB_MID=0x55C<<18;    //11 bit Part A ID
AT91C_BASE_CAN->CAN_MB1.CAN_MB_MAM=0x00000000;   //accept all   
AT91C_BASE_CAN->CAN_MB1.CAN_MB_MDH=0x87654321;   //data high
AT91C_BASE_CAN->CAN_MB1.CAN_MB_MDL=0x03345602;   //data low
AT91C_BASE_CAN->CAN_MB1.CAN_MB_MMR=0x03<<24;     //transmit


//enable CAN without ABM
AT91C_BASE_CAN->CAN_MR = AT91C_CAN_CANEN;


//transmit it
AT91C_BASE_CAN->CAN_MB1.CAN_MB_MCR =(8<<16)|AT91C_CAN_MTCR;   

HTH,
GSNT
Author:  hzn [ Tue Jul 10, 2007 6:43 pm ]
Post subject: 
FINALLY!!!! :P

I made it to work.. and Gerd, you were right, the CAN Tranciever was damaged. I replaced it with new one, and everything worked without a code change!.


MANY THANKS MAN!
I owe you. :)


I think this will be good topic for anyone to refer when working on CAN.\
Author:  hzn [ Tue Jul 10, 2007 6:45 pm ]
Post subject: 
And also for ALL:
Code:
#define CAN_BR_500K      0x00053255
#define CAN_BR_250K      0x000B3255
#define CAN_BR_200K      0x000E3255
#define CAN_BR_150K      0x00133255
#define CAN_BR_125K      0x00173255
#define CAN_BR_100K      0x001D3255
#define CAN_BR_83K      0x00233255
#define CAN_BR_75K      0x00273255
#define CAN_BR_50K      0x003B3255
#define CAN_BR_25K      0x00773255



Baudrates for AT91SAM7X MCK=48Mhz.


ps. if you think you don't have signal propagation time,
then last 255 can be modified to 066.
Author:  GSNT [ Tue Jul 10, 2007 7:05 pm ]
Post subject: 
Glad to hear!
And now you're one of the most experienced CAN hard- and software guys.
Congratulations!

Regards,
GSNT
Author:  kosh [ Thu Sep 02, 2010 3:45 pm ]
Post subject:  Re: Can't make CAN to recieve messages : AT91SAM7X
problem solved --
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