Abl-electronic PIC Microcontrollers PIC16 Manuel d'utilisateur télécharger pdf (Page 154)

mikroC

- C Compiler for Microchip PIC microcontrollers

mikroC

making it simple...

146

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Prototype

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

*CAN_RX_MSG_FLAGS);

Returns Message from receive buffer or zero if no message found.

Description Function reads message from receive buffer. If at least one full receive buffer is found, it

is extracted and returned. If none found, function returns zero.

Parameters:

id is message identifier; data is an array of bytes up to 8 bytes in length;

datalen is data length, from 1–8; CAN_RX_MSG_FLAGS is value formed from constants

(see CAN constants).

Requires CAN must be in mode in which receiving is possible.

Example

char rcv, rx, len, data[8]; long id;

rcv = CANRead(id, data, len, 0);

CANRead

Prototype

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

CAN_TX_MSG_FLAGS);

Returns Returns zero if message cannot be queued (buffer full).

Description If at least one empty transmit buffer is found, function sends message on queue for

transmission. If buffer is full, function returns 0.

Parameters:

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

on message type (standard or extended); data is array of bytes up to 8 bytes in length;

datalen is data length from 1–8; CAN_TX_MSG_FLAGS is value formed from constants

(see CAN constants).

Requires CAN must be in Normal mode.

Example

char tx, data; long id;

tx = CAN_TX_PRIORITY_0 & CAN_TX_XTD_FRAME;

CANWrite(id, data, 2, tx);

CANWrite

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Abl-electronic PIC Microcontrollers PIC16 Manuel d'utilisateur Page 154