Hi ,
Now,I am debugging the CAN-FD. The CAN_FD Tx is working ok now,while the rx has some problem. I am using the can_0 MB[0] to transmit the message, while use the MB[1] to receive the message and use the interrupt method . The register setting as below:
/*CAN0 MB寄存器的设置，其中MB[1]设置为发receive，MB[0]设置为transmit。*/
/****transmit MB 设置****/
CAN_0.MB[0].CS.B.CODE = 8; //MB[0]设置为发送MB
/****receive MB 设置****/
CAN_0.MB[1].CS.B.IDE = 0; /* MB 0 will look for a standard ID */
CAN_0.MB[1].ID.B.ID_STD = 0X555; /* MB 0 will look for ID = 0x555 */
CAN_0.MB[1].CS.B.CODE = 4; /* MB 0 set to RX EMPTY */
CAN_0.RXMGMASK.R = 0; /* Global acceptance mask */
/****Enable MB[1]中断****/
CAN_0.IMASK1.R = 0x00000002;
INTC.PSR[568].R = 0x8001; //使能MB[1]中断
/* configure CAN0TX and CAN0RX pin functions */
SIUL2.MSCR[16].B.SSS = 1; /* Pad PB0: Source signal is CAN0_TX */
SIUL2.MSCR[16].B.OBE = 1; /* Pad PB0: Output Buffer Enable */
SIUL2.MSCR[16].B.SRC = 3; /* Pad PB0: Maximum slew rate */
SIUL2.MSCR[17].B.IBE = 1; /* Pad PB1: Enable pad for input - CAN0_RX */
SIUL2.IMCR[188].B.SSS = 2; /* CAN0_RX: connected to pad PB1 */
/* Finally clear the HALT flag in MCR to enable the FlexCAN
* to synchronize with the CAN bus and allow
* participation in communication. */
CAN_0.CTRL2.R = CAN_0.CTRL2.R | ISO_CAN_FD_ENABLE;
While the Vect_Table also set ok ,
When i debug the project, I don't know why I cannot go to the interrupt interface.Can you give me some advice?
Thank you.
Hi petrl,
I just do as you say, set the MB[0] as the receive and the MB[1] as the transmit, then let MB[1] memory offset 0xc8 , at the same time I set the CAN_0.CTRL1.B.LPB = 1 and let the can_0 controller go into the loop-back mode , The project work right and can realize the can_fd message self transmit and receive, the transmit data and the receive data are all right.
Then i close the loop-back mode ,and use the canoe to monitor the can_fd message, I set a breakpoint in the can_receive interrupt function in the project. When i start to debug the project , then some strange things happen.
When the can_fd message is sent successfully , then the project will always run into the can_receive interrupt breakpoint, it seems that the can controller still in the loop-back mode , then i debug the project and confirm the CAN_0.CTRL1.B.LPB value is 0. I don't the reason why.
I debug another project which send and receive the standard can message, it also has the same problem.Can you help me check if some registers value are not right or i forget set some register.the can register setting value as blew:
wish your reply.
Thanks.
