Mikroelektronika MIKROE-742 데이터 시트

193

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

procedure CANSPISetFilter(CAN_FILTER: byte; val: longint;
CAN_CONFIG_FLAGS: byte);

Nothing.

Configures message filter. The parameter value is bit-adjusted to the appropri-
ate filter registers.

Parameters:

- 

CAN_FILTER

: CANSPI module filter number. Valid values: CANSPI_FILTER 

constants (see CANSPI constants) 

- 

val

: filter register value 

- 

CAN_CONFIG_FLAGS

: selects type of message to filter. Valid values: 

CANSPI_CONFIG_ALL_VALID_MSG

, 

CANSPI_CONFIG_MATCH_MSG_TYPE 

and CANSPI_CONFIG_STD_MSG, 

CANSPI_CONFIG_MATCH_MSG_TYPE 

and CANSPI_CONFIG_XTD_MSG.

(see CANSPI constants) 

The CANSPI module must be in Config mode, otherwise the function will be
ignored. See CANSPISetOperationMode.

The CANSPI routines are supported only by MCUs with the SPI module.

MCU has to be properly connected to mikroElektronika's CANSPI Extra Board
or similar hardware. See connection example at the bottom of this page.

// set the appropriate filter value and message type

CANSPISetOperationMode(CANSPI_MODE_CONFIG,0xFF);

// set CONFIGURATION mode (CANSPI module must be in config mode
for filter settings)

// Set id of filter B1_F1 to 3: 

CANSPISetFilter(CANSPI_FILTER_B1_F1, 3, CANSPI_CONFIG_XTD_MSG);