MikroElektronika PIC Microcontrollers PIC18 Manuale Utente Scaricare il pdf (Pagina 29)

id is the CAN message identifier. Only 11 or 29 bits may be used depending on

message type (standard or extended). data is an array of bytes up to 8 where the

received data is stored. datalen is the length of the received data (1 to 8).

CAN_RX_MSG_FLAGS can be one of the following:



CAN_RX_FILTER_1 Receive buffer filter 1 accepted this message



CAN_RX_FILTER_2 Receive buffer filter 2 accepted this message



CAN_RX_FILTER_3 Receive buffer filter 3 accepted this message



CAN_RX_FILTER_4 Receive buffer filter 4 accepted this message



CAN_RX_FILTER_5 Receive buffer filter 5 accepted this message



CAN_RX_FILTER_6 Receive buffer filter 6 accepted this message



CAN_RX_OVERFLOW Receive buffer overflow occurred

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CAN_RX_INVALID_MSG Invalid message received

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CAN_RX_XTD_FRAME Extended identifier message received



CAN_RX_RTR_FRAME RTR frame message received



CAN_RX_DBL_BUFFERED This message was double buffered

These flags can be bitwise AND’ed if desired.

9.10.8 CANWrite

The CANWrite function is used to send a message to the CAN bus. A zero is returned

if message can not be queued (buffer full). The function prototype is:

char CANWrite(long id, char *data, char datalen, char

CAN_TX_MSG_F LAGS)

id is the CAN message identifier. Only 11 or 29 bits may be used depending on message

type (standard or extended). data is an array of bytes up to 8 where the data to be sent is

stored. datalen is the length of the data (1 to 8).

CAN_TX_MSG_FLAGS can be one of the following:



CAN_TX_PRIORITY_0 Transmit priority 0



CAN_TX_PRIORITY_1 Transmit priority 1

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MikroElektronika PIC Microcontrollers PIC18 Manuale Utente Pagina 29