Argox PA-20 Programming Guide Bedienungsanleitung PDF herunterladen (Seite 93)

PT-20 Programming Guide

transmitted one by one until the specified number of character is sent. Use

the argument “port” as the connect port which is chosen to open. You can

choose 1(RS232). The argument “count” is the number of words of sending

data.

If you select RS-232 and set hardware flow control(CTS/RTS), this function

will wait while data be transmitted.

Returns：

-1 : error

Other value: the number of words that success writing into.

open_com

Purpose：

Initialize and enable specified RS232 port

Syntax：

int open_com(int com_port, int setting);

Example call：

open_com(1,0x0b);/*openCOM1，baud rate 38400,8 data bits,no parity,no

handshake*/

Includes：

#include “SDK.h ”

Description：

The open_com function initializes the specified RS-232 port. It clears the

receive buffer, stops any data transmission under going, reset the status of

the port, and set the RS-232 specification according to parameters set. Use

the argument “port” as the connect port which is chosen to open. You can

choose 1(RS232).

Each bit of the argument “setting”：

baud rate

0 :115200 1-2 : 57600

3 : 38400 4 : 19200

5 : 9600 6-7 : 4800

data bits

0 : 7bits 1 : 8bits

Parity enable

0 : disable 1 : enable

even / odd

0 : odd 1 : even

flow control

0 : disabe 1 : enable

flow control method

0 : CTS/RTS 1 : Reserved

Returns：

0 : Open fail

1 : Open success

Remark：

When flow control set up disable and flow control method set up CTS/RTS.

When you use IR port, the baud rate only can be setted 115200, flow control

disable.

read_com

Purpose：

Read 1 byte from the RS232 receive buffer

Syntax：

int read_com(int port, char *c);

Example call：

char c;

int i;

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