ABL electronic PIC12, PIC16, PIC18 RS485Slave_Send, RS485Slave_Receive

mikroC

mikroC - C Compiler for Microchip PIC microcontrollers

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RS485Slave_Receive

Prototype	void RS485Slave_Receive(char *data);
Description	Receives message addressed to it. Messages are multi-byte, so this function must be
	called for each byte received (see the example at the end of the chapter). Upon receiving
	a message, buffer is filled with the following values:
	data[0..2] is the message,
	data[3] is number of message bytes received, 1–3,
	data[4] is set to 255 when message is received,
	data[5] is set to 255 if error has occurred,
	data[6] is the address of the Slave which sent the message.
	Function automatically adjusts data[4] and data[5] upon every received message.
	These flags need to be cleared from the program.
Requires	MCU must be initialized as Slave in RS-485 communication in order to be assigned an
	address. See RS485Slave_Init.
Example	unsigned short msg[8];
	...
	RS485Slave_Read(msg);

RS485Slave_Send

	Prototype	void RS485Slave_Send(char *data, char datalen);
	Description	Sends data from buffer to Master via RS-485; datalen is a number of bytes in mes-
		sage (1 <= datalen <= 3).
	Requires	MCU must be initialized as Slave in RS-485 communication in order to be assigned an
		address. See RS485Slave_Init.
		It is programmer’s responsibility to ensure (by protocol) that only one device sends data
		via 485 bus at a time.
	Example	unsigned short msg[8];
		...
		RS485Slave_Send(msg, 2);
	page
246		MikroElektronika: Development tools - Books - Compilers