Commell MPX-2515 Bedienungsanleitung PDF herunterladen (Seite 12)

Commell MPX-2515 User’s Guide Rev 0100

Taiwan Commate Computer Inc.

terminated by raising the CS# pin. The following figure shows the MCP2515 Read

instruction.

Figure 2 MCP2515 Read Instruction

#define CCP_CAN_SYSTEM_SERVICE 0X20 /* COMMAND: command code */

#define CAN_READ_INSTRUCT 0X86 /* DATA_0: sub-command code */

#define EP2 2 /* Endpoint 2 */

#define EP3 3 /* Endpoint 3 */

OFFSET BULK OUT (EP2) BULK IN (EP1)

SIZEOF_DATA 0X04 Number of bytes returned

COMMAND 0X20 Byte_0 (return byte 0)

ERROR 0X00 Byte_1 (return byte 1)

DATA_0 0X86 Byte_2 (return byte 2)

DATA_1 Number of bytes to read ...

DATA_2 0X03 (constant) ...

DATA_3 Starting register address ...

DATA_4 Checksum ...

...

DATA_n Checksum

1.5.7 CAN_WRITE_INSTRUCT

The CAN_WRITE_INSTRUCT implements MCP2515 Write Instruction. The

Write instruction is started by lowering the CS# pin. The Write instruction is then

sent to the MCP2515 followed by the address and at least one byte of data.

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Commell MPX-2515 Bedienungsanleitung Seite 12