inport.c

直接通过DLL实现端口读写操作的mex程序

#include "mex.h"
#include "conio.h"

void mexFunction( int nlhs, mxArray *plhs[],
				  int nrhs, const mxArray*prhs[] )
{
	unsigned short port;
	unsigned char  ch;
	double   *ptr;

	if (nrhs != 1)
		mexErrMsgTxt("Need one parameter\n");

	if (!mxIsNumeric(prhs[0]))
		mexErrMsgTxt("Port should be numeric\n");

	ptr     = mxGetPr(prhs[0]);
	port    = (unsigned short) (*ptr);
	ch      = _inp(port);
	
	plhs[0] = mxCreateDoubleMatrix(1, 1, mxREAL);
	ptr     = mxGetPr(plhs[0]);
	*ptr    = (double)ch;
}