Argox PA-20 Programming Guide Manuale Utente Scaricare il pdf (Pagina 94)

PT-20 Programming Guide

i = read_com(1,c);

if (i) _printf(“char %c received from COM1”,*c);

Includes：

#include “SDK.h ”

Description：

This routine is used to read one byte from the receive buffer and then

remove it from the buffer. However, if the buffer is empty, no action is taken

and 0 is returned. Use the argument “port” as the connect port which is

chosen to open. You can choose 1(RS232).

Returns：

1, available or 0 if buffer is empty

write_com

Purpose：

Send a string out through RS232 port

Syntax：

int write_com(int port, char *s);

Example call：

char s[20]={“Hello World\n”};

write_com(1,s);

Includes：

#include “SDK.h ”

Description：

This routine is used to send a string through RS232 ports. If any prior

transmission is still in process, it is terminated then the current transmission

resumes. The character string is transmitted one by one until a NULL

character is met. A null string can be used to terminate prior transmission.

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

can choose 1(RS232).

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.

USB_Open

Purpose：

Initialize and enable USB port.

Syntax：

void USB_Open(void);

Example call：

USB_Open();

Includes：

#include “SDK.h ”

Description：

The USB_Open function initializes and enable USB port.

Returns：

None

USB_Close

Purpose：

To close USB port

Syntax：

void USB_Close(void);

Example call：

USB_Close();

Includes：

#include “SDK.h ”

Description：

The USB_Close function disable and suspend USB port.

Returns：

None

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Argox PA-20 Programming Guide Manuale Utente Pagina 94

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