COMMELL MPX-2515 - Manual (Page 11)

Commell MPX-2515 User’s Guide Rev 0100
Taiwan Commate Computer Inc. 11
ERROR 0X00 Error code
DATA_0 0X04 Number of byte written (0X01)
DATA_1 Desired rate. Checksum
DATA_2 Checksum
DATA_3
DATA_4
DATA_5
1.5.5 CAN_RESET_INSTRUCT
The CAN_RESET_INSTRUCT implements MCP2515 Reset Instruction. The Reset
instruction can be used to re-initialize the internal registers of the MCP2515 and set
Configuration mode. This command provides the same functionality, via the SPI
interface, as the RESET# pin.
#define CCP_CAN_SYSTEM_SERVICE 0X20 /* COMMAND: command code */
#define MCP2515_RESET_INSTRUCT 0X85 /* DATA_0: sub-command code
*/
#define EP2 2 /* Endpoint 2 */
#define EP3 3 /* Endpoint 3 */
OFFSET BULK OUT (EP2) BULK IN (EP1)
SIZEOF_DATA 0X01 0X00
COMMAND 0X20 0X20
ERROR 0X00 Error code
DATA_0 0X85 CHECKSUM
DATA_1 CHECKSUM
DATA_2
DATA_3
DATA_4
DATA_5
Table 6 CAN_RESET_INSTRUCT Format
1.5.6 CAN_READ_INSTRUCT
The CAN_READ_INSTRUCT implements MCP2515 Read Instruction. The Read
instruction is started by lowering the CS# pin. The Read instruction is then sent to
the MCP2515 followed by the 8-bit address (A7 through A0). Next, the data stored
in the register at the selected address will be shifted out on the SO pin.
The internal address pointer is automatically incremented to the next address once
each byte of data is shifted out. Therefore, it is possible to read the next consecutive
register address by continuing to provide clock pulses. Any number of consecutive