COMMELL MPX-2515 - Manual (Page 32)

Commell MPX-2515 User’s Guide Rev 0100
Taiwan Commate Computer Inc. 32
1.8.7 MCP_LOAD_TXB2D0
The MCP_LOAD_TXB2D0 command loads the bytes in the Request Packet to the
associated MCP2515 registers in order to complete the corresponding message
transmission on the CAN bus.
#define CCP_CAN_TX_SERVICE 0X23 /* command category code */
#define MCP_LOAD_TXB2d0 0X45 /* sub-command code */
#define EP2 2 /* Endpoint 2 */
#define EP3 3 /* Endpoint 3 */
OFFSET BULK OUT (EP2) BULK IN (EP1)
SIZEOF_DATA 0X14 0X05
COMMAND 0X23 0X23
ERROR 0X00 Error code
DATA_0 0X45 Number of bytes return
(0X04)
DATA_1 Overwrite flag EFLG before transmitting
DATA_2 Reserved TXB2CTRL before
transmitting
DATA_3 0X50 EFLG after transmitted
DATA_4 Value to load to TXB0CTRL TXB2CTRL after
transmitted
DATA_5 0X56 checksum
DATA_6 0X09
DATA_7 Reserved
DATA_8 Reserved
DATA_9 Reserved
DATA_10 Reserved
DATA_11 TXB2DLC
DATA_12 TXB2D0
DATA_13 TXB2D1
DATA_14 TXB2D2
DATA_15 TXB2D3
DATA_16 TXB2D4
DATA_17 TXB2D5
DATA_18 TXB2D6
DATA_19 TXB2D7
DATA_20 checksum
1.8.8 MCP_ABORT_TXB0
The MCP_ABORT_TXB0 command set the TXREQ.ABTF to abort the
corresponding message. Please refer to the ABORT TRANSMISSION paragraph
and the MCP2515 data sheet for transmission abort limitations.