Mikroelektronika MIKROE-742 데이터 시트

You may use bitwise and to form config byte out of these values. For example:

init := CANSPI_CONFIG_SAMPLE_THRICE

and

CANSPI_CONFIG_PHSEG2_PRG_ON

and

CANSPI_CONFIG_STD_MSG

and

CANSPI_CONFIG_DBL_BUFFER_ON

and

CANSPI_CONFIG_VALID_XTD_MSG

and

CANSPI_CONFIG_LINE_FILTER_OFF;

...

CANSPIInitialize(1, 1, 3, 3, 1, init); // initialize CANSPI

CANSPI_TX_MSG_FLAGS

CANSPI_TX_MSG_FLAGS are flags related to transmission of a CAN message:

const

CANSPI_TX_PRIORITY_BITS = 0x03;

CANSPI_TX_PRIORITY_0 = 0xFC;

// XXXXXX00

CANSPI_TX_PRIORITY_1 = 0xFD;

// XXXXXX01

CANSPI_TX_PRIORITY_2 = 0xFE;

// XXXXXX10

CANSPI_TX_PRIORITY_3 = 0xFF;

// XXXXXX11

CANSPI_TX_FRAME_BIT = 0x08;
CANSPI_TX_STD_FRAME = 0xFF;

// XXXXX1XX

CANSPI_TX_XTD_FRAME = 0xF7;

// XXXXX0XX

CANSPI_TX_RTR_BIT = 0x40;
CANSPI_TX_NO_RTR_FRAME = 0xFF;

// X1XXXXXX

CANSPI_TX_RTR_FRAME = 0xBF;

// X0XXXXXX

You may use bitwise and to adjust the appropriate flags. For example:

// form value to be used as sending message flag:

send_config := CANSPI_TX_PRIORITY_0

and

CANSPI_TX_XTD_FRAME

and

CANSPI_TX_NO_RTR_FRAME;

...

CANSPIWrite(id, data, 1, send_config);

CANSPI_RX_MSG_FLAGS

CANSPI_RX_MSG_FLAGS

are flags related to reception of CAN message. If a particu-

lar bit is set then corresponding meaning is TRUE or else it will be FALSE.

const

CANSPI_RX_FILTER_BITS = 0x07; // Use this to access filter bits

CANSPI_RX_FILTER_1 = 0x00;

197

MIKROELEKTRONIKA

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

Libraries

mikroPASCAL PRO for AVR

CHAPTER 6