TM4C1294NCPDT: CAN transmition, Reception, sending RTR at particular node IDs like 201, 202, 203 etc

digvijay khambe

Part Number: TM4C1294NCPDT

Respected sir,

I am developing CAN master program for communicating with slave(already developed). Already i am able to brodcast the can message and receive the can message from any node (ui32MsgIDMask = 0).

But now i want to achieve following tasks

1. Send data at particular node(201 , 202 ,203 etc)

2. Send RTR at particular node(201 , 202 ,203 etc) and receive data from those nodes.

3. Receive data from particular nodes.

So please tell me how to configure tCANMsgObject ??

Right now for reception i am using following configuration

   ui32MsgData = 0;
     sCANMessage.ui32MsgID = 0;
     sCANMessage.ui32MsgIDMask = 0;                                                                                                        ?????????What to write here??????????????
     sCANMessage.ui32Flags = MSG_OBJ_RX_INT_ENABLE | MSG_OBJ_USE_ID_FILTER;          ?????????What to write here??????????????
     sCANMessage.ui32MsgLen = 8;

And for transmission

      sCANMessage.ui32MsgID = 0;
      sCANMessage.ui32MsgIDMask = 0;                                                              ?????????What to write here??????????????
      sCANMessage.ui32Flags = MSG_OBJ_TX_INT_ENABLE;                      ?????????What to write here??????????????
      sCANMessage.ui32MsgLen = sizeof(pui8MsgData);
      sCANMessage.pui8MsgData = pui8MsgData;       .

over 7 years ago

0 digvijay khambe over 7 years ago

Expert 2735 points

Respected sir,

The communication i want is shown in attached snap.

0 Charles Tsai over 7 years ago

TI__Guru**** 190986 points

If you want to allow messageID of 0x200, 0x201, 0x202 and 0x203 then you will set ui32MsgID = 0x200 and ui32MsgIDMask = 0xfffc on your receiver. For the transmitter you don't need to set the mask.

0 digvijay khambe over 7 years ago in reply to Charles Tsai

Expert 2735 points

Respected sir,

Thank you for the reply. Now i can transmit and receive message with node id. But now i am facing new problem. I want to perform operation as shown in snap. I want to send RTR request to slave and then receive message from slave. Right now i am able to send RTR request using MSG_OBJ_TYPE_TX_REMOTE. But i am not able to receive the message transmitted by slave. So please tell me what should be the configuration of tCANMsgObject and CANMessageSet(); ?? Also what is the step wise procedure to follow to achieve this operation??

Regards,

Digvijay

0 Charles Tsai over 7 years ago in reply to digvijay khambe

TI__Guru**** 190986 points

You need to use something like below to start a remote frame.
CANMessageSet(CAN0_BASE, 1, &sMsgObjectRx, MSG_OBJ_TYPE_TX_REMOTE);

The below post has similar question.
e2e.ti.com/.../2372329

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TM4C1294NCPDT: CAN transmition, Reception, sending RTR at particular node IDs like 201, 202, 203 etc