uart3.c

C语言源代码及相关资料

#include <rs232.h>
#include <utility.h>
#include <ansi_c.h>

#include "uartx.h"
/*
===================================
	uart3
===================================
*/

static
unsigned char *	puart;

static
int				com;

void	uart3_enable( void )
{
	puart = "CNCB3";
	com    = 4;
}

void	uart3_disable( void )
{
	puart = "";
	com    = 0;
}

int		uart3_close ( void )
{
	CloseCom ( com );
	uart3_disable ();
	return 0;
}

int		uart3_open ( int baud, int startbits, int databits, int paritybit, int stopbits )
{

	uart3_enable ();

	OpenComConfig ( com, puart, baud, paritybit, databits, stopbits, 1024, 1024 );

/*  Turn off Hardware handshaking (loopback test will not function with it on) */
	SetCTSMode ( com, LWRS_HWHANDSHAKE_OFF );
//	SetCTSMode ( com, LWRS_HWHANDSHAKE_CTS_RTS_DTR );
//	SetCTSMode ( com, LWRS_HWHANDSHAKE_CTS_RTS );

/*  Make sure Serial buffers are empty */
	FlushInQ ( com );
	FlushOutQ ( com );

/*  Promt the user to enter an event character. */
//	PromptPopup ("Event Character", "Enter the Event Character", gEventChar, 1);

/*  Install a callback such that if the event character appears at the receive buffer, our function will be notified.  */
//	InstallComCallback (1, LWRS_RXFLAG, 0, (int)gEventChar[0] , Event_Char_Detect_Func, 0);

	return 0;
}

int		uart3_read ( unsigned char * pbuf, int nSize )
{
char	szTmp[ 160 ];
int		len;
int		count = 2;

	while ( !(len = GetInQLen ( com )) && (count-- > 0) );

	if ( len <= 0 || nSize <= 0 )
	{
		sprintf ( szTmp, "InQ : %d, buffer size = %d\n", len, nSize );
		printf ( szTmp );
//		MessagePopup ( "Debug", szTmp );
		return 0;
	}

	if ( len > nSize ) len = nSize;

	return ComRd ( com, pbuf, len );
}

int		uart3_write ( unsigned char * pdata, int size )
{
	return ComWrt ( com, pdata, size );
}