Rs485Master_Init; Rs485Master_Receive - mikroElektronika PIC Microcontrollers PIC12 User Manual

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RS485Master_Init

Prototype
void RS485Master_Init(void);
Description Initializes PIC MCU as Master in RS-485 communication.
Requires USART HW module needs to be initialized. See
Example
RS485Master_Init();

RS485Master_Receive

Prototype
void RS485Master_Receive(char *data);
Description Receives any message sent by Slaves. 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]
data[3]
data[4]
data[5]
data[6]
Function automatically adjusts
These flags need to be cleared from the program.
Requires MCU must be initialized as Master in RS-485 communication in order to be assigned an
address. See
Example
unsigned short msg[8];
...
RS485Master_Receive(msg);
page
244
is the message,
is number of message bytes received, 1–3,
is set to 255 when message is received,
is set to 255 if error has occurred,
is the address of the Slave which sent the message.
data[4]
.
RS485Master_Init
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.
USART_Init
and upon every received message.
data[5]
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