Argox PA-20 Programming Guide Bedienungsanleitung PDF herunterladen (Seite 92)

PT-20 Programming Guide

Description：

This routine is used to check if prior transmission is still in process or not.

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

can choose 1(RS232).

Returns：

0, prior transmission still in course

1, transmission completed

-1, the transmitting port choices error

com_overrun

Purpose：

See if overrun error occurred

Syntax：

int com_overrun(int port);

Example call：

if (com_overrun(1) > 0) clear_com(1);

Includes：

#include “SDK.h ”

Description：

This routine is used to see if overrun met. The overrun flag is automatically

cleared after examined. You can choose 1(RS232) or.

Returns：

1, overrun error met

0, OK

-1, the transmitting port choices error

com_rts

Purpose：

Set RTS signal

Syntax：

void com_rts(int port, int val);

Example call：

com_rts(1,1);

Includes：

#include “SDK.h ”

Description：

This routine is used to control the RTS signal. It works even when the CTS

flow control is selected. However, RTS might be changed by the

background routine according to receiving buffer status. It is strongly

recommended not to use this routine if CTS control is utilized. Use the

argument “port” as the connect port which is chosen to open. Now we only

can choose 1(COM).

The argument “val” is set up RTS, 1 is ok for receiving data; 0 is error.

Returns：

None

nwrite_com

Purpose：

Send a specific number of characters out through RS232 port

Syntax：

int nwrite_com(int port, char *s, int count);

Example call：

char s[20]={”Hello World\n”};

nwrite_com(1,s,5);/*send string “Hello” to connect port*/

Includes：

#include “SDK.h ”

Description：

This routine is used to send a specific number of characters specified by

count through RS232 ports. If any prior transmission is still in process, it is

terminated then the current transmission resumes. The character string is

1 2 ... 87 88 89 90 91 92 93 94 95 96 97 ... 129 130

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