Psychtoolbox>PsychHID

Usage:

General commands:

rc = PsychHID(‘KeyboardHelper’, commandCode)

Support for generic USB-HID devices:

numberOfDevices=PsychHID(‘NumDevices’)
devices=PsychHID(‘Devices’ [, deviceClass])
elementState=PsychHID(‘RawState‘,deviceNumber,elementNumber)
[keyIsDown,secs,keyCode]=PsychHID(‘KbCheck’ [, deviceNumber][, scanList])
[report,err]=PsychHID(‘GetReport‘,deviceNumber,reportType,reportID,reportBytes)
err=PsychHID(‘SetReport‘,deviceNumber,reportType,reportID,report)
[reports,err]=PsychHID(‘GiveMeReports‘,deviceNumber,[reportBytes])
err=PsychHID(‘ReceiveReports‘,deviceNumber[,options])
err=PsychHID(‘ReceiveReportsStop‘,deviceNumber)

Queue based keyboard queries: See ‘help KbQueueCreate’ for explanations:

PsychHID(‘KbQueueCreate’, [deviceNumber][, keyFlags=all][, numValuators=0][, numSlots=10000][, flags=0][, windowHandle=0])
PsychHID(‘KbQueueRelease’ [, deviceIndex])
[navail] = PsychHID(‘KbQueueFlush’ [, deviceIndex][, flushType=1])
PsychHID(‘KbQueueStart’ [, deviceIndex])
PsychHID(‘KbQueueStop’ [, deviceIndex])
[keyIsDown, firstKeyPressTimes, firstKeyReleaseTimes, lastKeyPressTimes, lastKeyReleaseTimes]=PsychHID(‘KbQueueCheck’ [, deviceIndex])
secs=PsychHID(‘KbTriggerWait’, KeysUsage, [deviceNumber])
[event, navail] = PsychHID(‘KbQueueGetEvent’ [, deviceIndex][, maxWaitTimeSecs=0])

Support for access to generic USB devices: See ‘help ColorCal2’ for one usage example:

usbHandle = PsychHID(‘OpenUSBDevice’, vendorID, deviceID [, configurationId=0])
PsychHID(‘CloseUSBDevice’ [, usbHandle])
outData = PsychHID(‘USBControlTransfer’, usbHandle, bmRequestType, bRequest, wValue, wIndex, wLength, inData)

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