CAN Interrupts

Marco_Andarcia

Other Parts Discussed in Thread: TMS320F28069

Hi,

I am trying ti implement CAN on my TMS320F28069. I went through the ecanback2back example, and F2806x_ECan.h and F2806x_ECan.c to my project. I think I set up the mailboxes properly but I do not know how to set up the interrupt for when I receive a can message through the CANRX pin.

This is how set up the mailboxes.

void EnableMailboxes()
{
// eCAN control registers require read/write access using 32-bits. Thus we
// will create a set of shadow registers for this example. These shadow
// registers will be used to make sure the access is 32-bits and not 16.
struct ECAN_REGS ECanaShadow;

ECanaMboxes.MBOX0.MSGID.all = 0x9555AAA0; // from example.
ECanaMboxes.MBOX1.MSGID.all = 0x9555AAA1; // from example.
ECanaShadow.CANMD.all = ECanaRegs.CANMD.all;
ECanaShadow.CANMD.bit.MD0 = 0; //MBOX0 = TX
ECanaShadow.CANMD.bit.MD1 = 1; //MBOX1 = RX
ECanaShadow.CANME.bit.ME0 = 1; //Mailbox 0 enabled
ECanaShadow.CANME.bit.ME1 = 1;
ECanaMboxes.MBOX0.MSGCTRL.bit.DLC = 8; //specify that 8 bits are sent
ECanaMboxes.MBOX1.MSGCTRL.bit.DLC = 8;
}

Thanks in advance.

over 12 years ago

0 Frank Bormann over 12 years ago

Mastermind 7585 points

You will have to program registers CANMIM,CANMIL,CANGIM; Figure 16-42 of the TRM is a very good point to start with

Additionally you wll have to set PIEIER, IER and INTM.

Write an interrupt service routine and add its address to the PIE-vectortable.

0 Marco_Andarcia over 12 years ago in reply to Frank Bormann

Intellectual 370 points

Figure 16-42? where is that on the datasheet? Is there an other documentation on CAN for this processor besides pages 119-122 on the datasheet? There is not a lot of info on the datasheet about how CAN works on the processor, most of my code is from the example.

Thanks in advance.

0 Frank Bormann over 12 years ago in reply to Marco_Andarcia

Mastermind 7585 points

spruh18d

C2000™︎ microcontrollers

C2000 microcontrollers forum

CAN Interrupts