com_open.c

MatLab图像传感器网络仿真平台WiSNAP

/*******************************************************************************
 * Open RS-232 communications object.                                          *
 * Syntax: Handle = Com_Open(Com_Port, Baud_Rate)                              *
 *                                                                             *
 *    Input Parameters:                                                        *
 *    ================                                                         *
 *                                                                             *
 *       Com_Port ----> Serial RS-232 port (string).                           *
 *       Baud_Rate ---> Serial baud rate (positive integer).                   *
 *                                                                             *
 *    Output Parameters:                                                       *
 *    =================                                                        *
 *                                                                             *
 *       Handle ------> I/O object handle (positive integer).                  *
 *                                                                             *
 *    See also Com_Close(), Com_Recv(), Com_Send().                            *
 *                                                                             *
 * Compile: mex -v com_open.c cmApiCom.c                                       *
 * Version: 01-22-2005                                                         *
 *                                                                             *
 * (C) 2004 Stephan Hengstler, Stanford Wireless Sensor Networks Lab           *
 *******************************************************************************/


#include <stdio.h>
#include <windows.h>
#include "mex.h"
#include "cmApiCom.h"

void mexFunction(int nlhs, mxArray *plhs[],int nrhs, const mxArray *prhs[])
{
	char 			*com_port;
	double		*result;
	HANDLE 		handle;
	int			baud_rate, status;

	/* get the value(s) of the input variable(s) */
	com_port 	= (char *) mxCalloc(5, sizeof(char));
	status		= mxGetString(prhs[0], com_port, 5);
	baud_rate 	= (int) mxGetScalar(prhs[1]);

	/* call the respective subroutine(s) */
	status		= cmComSet(CMCOM_TAG_BAUDRATE, baud_rate);
	handle 		= (HANDLE) cmComOpen(com_port);

	/* set the value(s) of the output variable(s) */
	plhs[0] 		= mxCreateDoubleMatrix(1, 1, mxREAL);
   result		= mxGetPr(plhs[0]);
	*result		= (int) handle;

   /* show debug information */
	if (nrhs == 3)
	{
		printf("Debug Information\n");
		printf("com_port 	= %s\n", com_port);
		printf("baud_rate	= %d\n", baud_rate);
		printf("handle   	= %d\n", handle);
	}

	/* clean exit */
	return;
}