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#include "math.h"
#include "string.h"
#include "mex.h"
#include <gpib/ib.h>
#include "dispatch.h"
/* Matlab:linux-GPIB Bridge (c) 2010 Richard George, University of Oxford
*
* Compile by typing the following from the Matlab console:
*
* mex gpib_function.c dispatch.c -lgpib
*/
extern DispatchTableEntry dispatch_table[];
int verbose = 2;
int write_verbose = 0;
int timeout_for_double(const double *t);
int ibfind_handler(int,mxArray*[],int,const mxArray*[]);
int ibsta_handler(int,mxArray*[],int,const mxArray*[]);
int ibcntl_handler(int,mxArray*[],int,const mxArray*[]);
int about_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[]);
int quiet_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[]);
int verbose_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[]);
int ibrdl_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[]);
int ibrd_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[]);
int ibwrt_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[]);
int ibclr_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[]);
int ibrsp_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[]);
int ibeos_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[]);
int ibeot_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[]);
int ibtmo_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[]);
char *about_desc = "Matlab to linux-GPIB Bridge (c) 2010 Richard George, University of Oxford\n";
char *ibfind_desc = "[handle]=ibfind('device_name') looks up a device in the /etc/gpib.conf file, and returns a handle to this device\n";
char *ibwrt_desc = "[status,written_count]=ibwrt(handle,buffer) writes to GPIB-handle, from buffer, using length of string\n";
char *ibrdl_desc = "[data,status,read_count]=ibrdl(handle) returns up to length bytes from the specified device\n";
char *ibrd_desc = "[data,status,read_count]=ibrd(handle,length) returns up to 8192 bytes from the specified device\n";
char *ibclr_desc = "ibclr(handle) performs a device clear on the specified device\n";
char *ibeos_desc = "ibeos(handle,end_of_string)\n";
char *ibeot_desc = "iteot(handle,value)\n";
char *ibtmo_desc = "ibtmo(handle,timeout) Set the read time-out, in seconds. The resolution of timeout is log-spaced, e.g. 100ms,300ms,1s,3s,10s,30s ...\n";
char *ibsta_desc = "return the value of ibsta\n";
char *ibcntl_desc = "return the value of ibcntl\n";
char *ibrsp_desc = "[result]=ibrsp(handle) performs a serial poll on the specified device\n";
char *quiet_desc = "turn off debug output from other functions in this library\n";
char *verbose_desc = "turn on debug output from other functions in this library\n";
DispatchTableEntry dispatch_table[] = {
/*
* Add entries here:
*
* Matlab name : # LHS args : # RHS args : C function : Help text */
{ "about" , 0 , 0 , about_handler , &about_desc},
{ "ibfind" , 1 , 1 , ibfind_handler , &ibfind_desc},
{ "ibrdl" , 3 , 2 , ibrdl_handler , &ibrdl_desc},
{ "ibrd" , 3 , 1 , ibrd_handler , &ibrd_desc},
{ "ibsta" , 1 , 0 , ibsta_handler , &ibsta_desc},
{ "ibcntl" , 1 , 0 , ibcntl_handler , &ibcntl_desc},
{ "ibwrt" , 2 , 2 , ibwrt_handler , &ibwrt_desc},
{ "ibclr" , 1 , 1 , ibclr_handler , &ibclr_desc},
{ "ibrsp" , 1 , 1 , ibrsp_handler , &ibrsp_desc},
{ "ibeos" , 1 , 2 , ibeos_handler , &ibeos_desc},
{ "ibeot" , 1 , 2 , ibeot_handler , &ibeot_desc},
{ "ibtmo" , 1 , 2 , ibtmo_handler , &ibtmo_desc},
{ "quiet" , 0 , 0 , quiet_handler , &quiet_desc},
{ "verbose" , 0 , 0 , verbose_handler , &verbose_desc},
/* Sentinel */
{0,0,0,0,0}
};
int timeout_for_double(const double *t)
{
const double valid_timeouts[] = {0.0,10e-6,30e-6,100e-6,300e-6,1e-3,3e-3,10e-3,30e-3,100e-3,300e-3,1.0,3.0,10.0,30.0,100.0,300.0,1000.0};
if (*t<=0.0) return 0;
if (*t>=1000.0) return 17;
int i=0;
while ((valid_timeouts[i]<*t)) i++;
return i;
}
int ibeot_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[])
{
if (nrhs==2)
{
int iresult = -1;
double *handle = mxGetPr(prhs[0]);
double *eot = mxGetPr(prhs[0]);
iresult = ibeot((int)*handle,(int)eot);
if (nlhs==1)
{
plhs[0]=mxCreateDoubleScalar((double)iresult);
}
return 0;
}
return -1;
}
int ibeos_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[])
{
if (nrhs==2)
{
int iresult = -1;
double *handle = mxGetPr(prhs[0]);
double *eos = mxGetPr(prhs[0]);
iresult = ibtmo((int)*handle,(int)eos);
if (nlhs==1)
{
plhs[0]=mxCreateDoubleScalar((double)iresult);
}
return 0;
}
return -1;
}
int ibtmo_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[])
{
if (nrhs==2)
{
int iresult = -1;
double *handle = mxGetPr(prhs[0]);
double *timeout = mxGetPr(prhs[1]);
int tmo=timeout_for_double(timeout);
if (verbose>3) mexPrintf("Handle = %d, Timeout %g sec => %d\n",(int)*handle,*timeout,tmo);
iresult = ibtmo((int)*handle,tmo);
if (nlhs==1)
{
plhs[0]=mxCreateDoubleScalar((double)iresult);
}
return 0;
}
return -1;
}
int ibfind_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[])
{
const char *device = mxArrayToString(prhs[0]);
if (verbose>2) mexPrintf("ibfind('%s')\n",device);
int result = ibfind(device);
if (verbose>2) mexPrintf("returns %d\n",result);
plhs[0] = mxCreateDoubleScalar((double)result);
return 0;
}
int ibsta_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[])
{
if (nrhs==1)
{
plhs[0] = mxCreateDoubleScalar((double)ibsta);
}
return 0;
}
int ibcntl_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[])
{
if (nrhs==1)
{
plhs[0] = mxCreateDoubleScalar((double)ibcntl);
}
return 0;
}
int ibwrt_handler(int nlhs, mxArray*plhs[], int nrhs, const mxArray* prhs[]) {
if (nrhs==2) {
double *handle = mxGetPr(prhs[0]);
mwSize n=mxGetN(prhs[1]), m=mxGetM(prhs[1]);
mxChar *buffer=mxGetChars(prhs[1]);
char *message = 0;
int i;
message = calloc(n*m+2, sizeof(char));
if (message!=0) {
for (i=0;i<n*m;i++)
{
message[i]=(char)buffer[i];
if (write_verbose>0) mexPrintf("message[%d]=0x%02X",i,(int)((unsigned char)message[i]));
if ((write_verbose>0) & (message[i]>32) & (message[i]<126)) mexPrintf(" (%c)",message[i]);
if (write_verbose>0) mexPrintf("\n");
}
message[i]=0;
if (write_verbose>0) mexPrintf("calling ibwrt(handle=%d,message,length=%d)\n",(int)*handle,(int)n*m);
int result = ibwrt((int)*handle, message, n*m);
if (write_verbose>0) mexPrintf("ibwrt returns 0x%04X, ibcntl=%d\n",result,ibcntl);
free(message);
if (nlhs>=1) plhs[0] = mxCreateDoubleScalar((double)result);
if (nlhs>=2) plhs[1] = mxCreateDoubleScalar((double)ibcntl);
}
}
return 0;
}
int ibrdl_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[])
{
if (nrhs==2)
{
int i;
double *handle = mxGetPr(prhs[0]);
double *length = mxGetPr(prhs[1]);
if (nlhs==3)
{
mwSize lengths[2];
/* mexPrintf("sizeof(mxChar)=%d, sizeof(char)=%d\n",sizeof(mxChar),sizeof(char)); */
char *buffer=calloc(((int)*length)+2,sizeof(char));
int result = ibrd((int)*handle,(void *)buffer,(int)*length);
/* mexPrintf("result = %d, buffer = %s\n",result,buffer); */
lengths[0]=1;
lengths[1]=(mwSize)(ibcntl);
plhs[0]=mxCreateCharArray(2,lengths);
mxChar *mxCharBuffer=(mxChar *)mxGetPr(plhs[0]);
for (i=0;i<ibcntl;i++) mxCharBuffer[i]=(mxChar)buffer[i];
free(buffer);
if (nlhs>=1) plhs[1]=mxCreateDoubleScalar((double)result);
if (nlhs>=2) plhs[2]=mxCreateDoubleScalar((double)ibcntl);
}
}
return 0;
}
int ibrd_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[])
{
int i;
char *buffer;
if (nrhs==1)
{
double *handle = mxGetPr(prhs[0]);
if (nlhs==3)
{
mwSize lengths[2];
/* mexPrintf("sizeof(mxChar)=%d, sizeof(char)=%d\n",sizeof(mxChar),sizeof(char)); */
char *buffer=calloc(8193,sizeof(char));
int result = ibrd((int)*handle,(void *)buffer,8192);
/* mexPrintf("result = %d, buffer = %s\n",result,buffer); */
lengths[0]=1;
lengths[1]=(mwSize)(ibcntl);
plhs[0]=mxCreateCharArray(2,lengths);
mxChar *mxCharBuffer=(mxChar *)mxGetPr(plhs[0]);
for (i=0;i<ibcntl;i++) mxCharBuffer[i]=(mxChar)buffer[i];
free(buffer);
if (nlhs>=1) plhs[1]=mxCreateDoubleScalar((double)result);
if (nlhs>=2) plhs[2]=mxCreateDoubleScalar((double)ibcntl);
}
}
return 0;
}
int ibclr_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[])
{
int result = -1;
if (nrhs==1) {
double *handle = mxGetPr(prhs[0]);
result = ibclr((int)*handle);
if (nlhs==1) {
plhs[0]=mxCreateDoubleScalar((double)result);
}
}
return 0;
}
int ibrsp_handler(int nlhs,mxArray*plhs[],int nrhs,const mxArray* prhs[])
{
if (nrhs==1)
{
double *handle = mxGetPr(prhs[0]);
char result = 0;
ibrsp((int)*handle,&result);
if (nlhs==1)
{
plhs[0]=mxCreateDoubleScalar((double)result);
}
}
return 0;
}
int quiet_handler(int nlhs,mxArray *plhs[],int nrhs,const mxArray *prhs[])
{
verbose = 0;
return 0;
}
int verbose_handler(int nlhs,mxArray *plhs[],int nrhs,const mxArray *prhs[])
{
verbose = 1;
mexPrintf("gpib_function: debug output is now enabled. Call gpib_function('quiet') to disable.\n");
return 0;
}
/* Example handler */
int about_handler(int nlhs,mxArray *plhs[],int nrhs,const mxArray *prhs[])
{
mexPrintf("Matlab to Linux-GPIB interface, (c) 2010 Richard George, University of Oxford\n\n");
return 0;
}
void ExitFcn()
{
mexPrintf("Exit function called for gpib_function()\n");
}
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