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/*
PsychToolbox3/Source/Common/PsychHID/PsychHIDGetCalibratedState.c
PROJECTS: PsychHID only.
PLATFORMS: Only OS X so far.
AUTHORS:
Allen.Ingling@nyu.edu awi
HISTORY:
5/12/03 awi Created.
TO DO:
*/
#include "PsychHID.h"
#if PSYCH_SYSTEM == PSYCH_OSX
static char useString[]= "elementState=PsychHID('CalibratedState', deviceNumber, elementNumber)";
static char synopsisString[] =
"Return the calibrated immediate state of the specified element on the specified device. "
"Elements states have both a nominal and an actual range. For joysticks and other rotary elements "
"the actual range of reported state values is smaller than than the nominal range. The HID driver stores the "
"most extreme values reported by the element in the "
"calMin and calMax fields of the element structure returned by PsychHID('Elements'); "
"The actual state as returned by 'RawState' is scalled using calMin and calMax and returned "
"by 'CalibratedState'. Insure that calMin and calMax hold true max and min values by swinging "
"the device element to its poles before calling 'CalibratedState'.";
static char seeAlsoString[] = "";
PsychError PSYCHHIDGetCalibratedState(void)
{
long elementValue;
SInt32 calibratedState;
pRecDevice deviceRecord;
pRecElement elementRecord;
int deviceIndex, elementIndex;
PsychPushHelp(useString, synopsisString, seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
PsychErrorExit(PsychCapNumOutputArgs(1));
PsychErrorExit(PsychCapNumInputArgs(2));
PsychCopyInIntegerArg(1, TRUE, &deviceIndex);
PsychCopyInIntegerArg(2, TRUE, &elementIndex);
PsychHIDVerifyInit();
deviceRecord= PsychHIDGetDeviceRecordPtrFromIndex(deviceIndex);
elementRecord= PsychHIDGetElementRecordFromDeviceRecordAndElementIndex(deviceRecord, elementIndex);
PsychCopyOutDoubleArg(1, FALSE, IOHIDElement_GetValue(elementRecord, kIOHIDValueScaleTypeCalibrated));
return(PsychError_none);
}
#endif
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