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/*
PsychToolbox3/Source/Common/PsychHID/PsychHIDGetNumDevices.c
PROJECTS: PsychHID only.
PLATFORMS: All
AUTHORS:
Allen.Ingling@nyu.edu awi
mario.kleiner@tuebingen.mpg.de mk
HISTORY:
4/29/03 awi Created.
TO DO:
*/
#include "PsychHID.h"
static char useString[]= "numberOfDevices=PsychHID('NumDevices')";
static char synopsisString[] = "Return the the number of USB HID devices connected to your computer.";
static char seeAlsoString[] = "";
PsychError PSYCHHIDGetNumDevices(void)
{
psych_uint32 numDevices;
PsychPushHelp(useString, synopsisString, seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
PsychErrorExit(PsychCapNumOutputArgs(1));
PsychErrorExit(PsychCapNumInputArgs(0));
PsychHIDVerifyInit();
numDevices=HIDCountDevices();
PsychCopyOutDoubleArg(1, FALSE, (double)numDevices);
return(PsychError_none);
}
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