// Set up a config record for saving
// takes an input records, returns record user can save as they want
// Note: the save rec must be pre-allocated by the calling app and will be filled out
void HIDSetElementConfig (pRecSaveHID pConfigRec, IOHIDDeviceRef inIOHIDDeviceRef, IOHIDElementRef inIOHIDElementRef, int actionCookie)
{
// must save:
// actionCookie
// Device: serial,vendorID, productID, location, usagePage, usage
// Element: cookie, usagePage, usage,
pConfigRec->actionCookie = actionCookie;
// device
// need to add serial number when I have a test case
if (inIOHIDDeviceRef && inIOHIDElementRef) {
pConfigRec->device.vendorID = IOHIDDevice_GetVendorID( inIOHIDDeviceRef );
pConfigRec->device.productID = IOHIDDevice_GetProductID( inIOHIDDeviceRef );
pConfigRec->device.locID = IOHIDDevice_GetLocationID( inIOHIDDeviceRef );
pConfigRec->device.usage = IOHIDDevice_GetUsage( inIOHIDDeviceRef );
pConfigRec->device.usagePage = IOHIDDevice_GetUsagePage( inIOHIDDeviceRef );
pConfigRec->element.usagePage = IOHIDElementGetUsagePage( inIOHIDElementRef );
pConfigRec->element.usage = IOHIDElementGetUsage( inIOHIDElementRef );
pConfigRec->element.minReport = IOHIDElement_GetCalibrationSaturationMin( inIOHIDElementRef );
pConfigRec->element.maxReport = IOHIDElement_GetCalibrationSaturationMax( inIOHIDElementRef );
pConfigRec->element.cookie = IOHIDElementGetCookie( inIOHIDElementRef );
} else {
pConfigRec->device.vendorID = 0;
pConfigRec->device.productID = 0;
pConfigRec->device.locID = 0;
pConfigRec->device.usage = 0;
pConfigRec->device.usagePage = 0;
pConfigRec->element.usagePage = 0;
pConfigRec->element.usage = 0;
pConfigRec->element.minReport = 0;
pConfigRec->element.maxReport = 0;
pConfigRec->element.cookie = 0;
}
}
// *************************************************************************
//
// IOHIDElement_SetupCalibration(inIOHIDElementRef)
//
// Purpose: set default values for the element calibration parameters
//
// Inputs: inIOHIDElementRef - the IOHIDElementRef for this element
//
// Returns: nothing
//
void IOHIDElement_SetupCalibration(IOHIDElementRef inIOHIDElementRef) {
// these are the min/max values returned by IOHIDValueGetScaledValue(v, kIOHIDValueScaleTypeCalibrated);
IOHIDElement_SetCalibrationMin(inIOHIDElementRef, IOHIDElementGetLogicalMin(inIOHIDElementRef));
IOHIDElement_SetCalibrationMax(inIOHIDElementRef, IOHIDElementGetLogicalMax(inIOHIDElementRef));
CFIndex phyMin = IOHIDElementGetPhysicalMin(inIOHIDElementRef);
CFIndex phyMax = IOHIDElementGetPhysicalMax(inIOHIDElementRef);
CFIndex phyRange = phyMax - phyMin;
// calculate the middle physical value we would expect from this element
double phyMid = (phyMin + phyMax) / 2.f;
// this is the granularity of the values returned by IOHIDValueGetScaledValue(v, kIOHIDValueScaleTypeCalibrated);
// for example if set to 0.1 the values returned will be multiples of 0.1 (0.1, 0.2, 0.3, etc.)
IOHIDElement_SetCalibrationGranularity(inIOHIDElementRef, 0.);
Boolean isRelative = IOHIDElementIsRelative(inIOHIDElementRef);
Boolean hasPreferredState = IOHIDElementHasPreferredState(inIOHIDElementRef);
// define the dead zone (like in the middle of joystick axis)
if (!isRelative && hasPreferredState && (phyRange > 3)) {
IOHIDElement_SetCalibrationDeadZoneMin(inIOHIDElementRef, phyMid - 1.0);
IOHIDElement_SetCalibrationDeadZoneMax(inIOHIDElementRef, phyMid + 1.0);
} else {
IOHIDElement_SetCalibrationDeadZoneMin(inIOHIDElementRef, 0.);
IOHIDElement_SetCalibrationDeadZoneMax(inIOHIDElementRef, 0.);
}
// get the current value of this element
double phyValue = IOHIDElement_GetValue(inIOHIDElementRef, kIOHIDValueScaleTypePhysical);
#if true
// use that that value to determine the min/max saturation values used for calibration
IOHIDElement_SetCalibrationSaturationMin(inIOHIDElementRef, phyValue);
IOHIDElement_SetCalibrationSaturationMax(inIOHIDElementRef, phyValue);
#else // if 1
#if true
// this value determines the min/max values that have been recieved from the device element
IOHIDElement_SetCalibrationSaturationMin(inIOHIDElementRef, (phyMin + phyMid) / 2.f);
IOHIDElement_SetCalibrationSaturationMax(inIOHIDElementRef, (phyMid + phyMax) / 2.f);
#else // if 1
// use it as our min/max saturation
// this value determines the min/max values that have been recieved from the device element
IOHIDElement_SetCalibrationSaturationMin(inIOHIDElementRef, phyMid);
IOHIDElement_SetCalibrationSaturationMax(inIOHIDElementRef, phyMid);
#endif // if 1
// and the current value to adjust the current saturation values if it's outside their range
if (phyValue < IOHIDElement_GetCalibrationSaturationMin(inIOHIDElementRef)) {
IOHIDElement_SetCalibrationSaturationMin(inIOHIDElementRef, phyValue);
}
if (phyValue > IOHIDElement_GetCalibrationSaturationMax(inIOHIDElementRef)) {
IOHIDElement_SetCalibrationSaturationMax(inIOHIDElementRef, phyValue);
}
#endif // if 1
} // IOHIDElement_SetupCalibration
// Set up a config record for saving
// takes an input records, returns record user can save as they want
// Note: the save rec must be pre-allocated by the calling app and will be filled out
void HIDSetElementConfig(HID_info_ptr inHIDInfoPtr,
IOHIDDeviceRef inIOHIDDeviceRef,
IOHIDElementRef inIOHIDElementRef,
IOHIDElementCookie actionCookie) {
// must save:
// actionCookie
// Device: serial,vendorID, productID, location, usagePage, usage
// Element: cookie, usagePage, usage,
inHIDInfoPtr->actionCookie = actionCookie;
// device
// need to add serial number when I have a test case
if (inIOHIDDeviceRef &&
inIOHIDElementRef)
{
inHIDInfoPtr->device.vendorID = IOHIDDevice_GetVendorID(inIOHIDDeviceRef);
inHIDInfoPtr->device.productID = IOHIDDevice_GetProductID(inIOHIDDeviceRef);
inHIDInfoPtr->device.locID = IOHIDDevice_GetLocationID(inIOHIDDeviceRef);
inHIDInfoPtr->device.usage = IOHIDDevice_GetUsage(inIOHIDDeviceRef);
inHIDInfoPtr->device.usagePage = IOHIDDevice_GetUsagePage(inIOHIDDeviceRef);
if (!inHIDInfoPtr->device.usagePage ||
!inHIDInfoPtr->device.usage)
{
inHIDInfoPtr->device.usagePage = IOHIDDevice_GetPrimaryUsagePage(inIOHIDDeviceRef);
inHIDInfoPtr->device.usage = IOHIDDevice_GetPrimaryUsage(inIOHIDDeviceRef);
}
inHIDInfoPtr->element.usagePage = IOHIDElementGetUsagePage(inIOHIDElementRef);
inHIDInfoPtr->element.usage = IOHIDElementGetUsage(inIOHIDElementRef);
inHIDInfoPtr->element.minReport = IOHIDElement_GetCalibrationSaturationMin(inIOHIDElementRef);
inHIDInfoPtr->element.maxReport = IOHIDElement_GetCalibrationSaturationMax(inIOHIDElementRef);
inHIDInfoPtr->element.cookie = IOHIDElementGetCookie(inIOHIDElementRef);
} else {
inHIDInfoPtr->device.vendorID = 0;
inHIDInfoPtr->device.productID = 0;
inHIDInfoPtr->device.locID = 0;
inHIDInfoPtr->device.usage = 0;
inHIDInfoPtr->device.usagePage = 0;
inHIDInfoPtr->element.usagePage = 0;
inHIDInfoPtr->element.usage = 0;
inHIDInfoPtr->element.minReport = 0;
inHIDInfoPtr->element.maxReport = 0;
inHIDInfoPtr->element.cookie = 0;
}
} // HIDSetElementConfig
void HIDDumpElementCalibrationInfo(IOHIDElementRef inIOHIDElementRef) {
printf(" Element: %p = { ", inIOHIDElementRef);
CFIndex calMin = IOHIDElement_GetCalibrationMin(inIOHIDElementRef);
CFIndex calMax = IOHIDElement_GetCalibrationMax(inIOHIDElementRef);
printf("cal: {min: %ld, max: %ld}, ", calMin, calMax);
CFIndex satMin = IOHIDElement_GetCalibrationSaturationMin(inIOHIDElementRef);
CFIndex satMax = IOHIDElement_GetCalibrationSaturationMax(inIOHIDElementRef);
printf("sat: {min: %ld, max: %ld}, ", satMin, satMax);
CFIndex deadMin = IOHIDElement_GetCalibrationDeadZoneMin(inIOHIDElementRef);
CFIndex deadMax = IOHIDElement_GetCalibrationDeadZoneMax(inIOHIDElementRef);
printf("dead: {min: %ld, max: %ld}, ", deadMin, deadMax);
double_t granularity = IOHIDElement_GetCalibrationGranularity(inIOHIDElementRef);
printf("granularity: %6.2f }\n", granularity);
} // HIDDumpElementCalibrationInfo
//*************************************************************************
//
// IOHIDElement_SetupCalibration( inElementRef )
//
// Purpose: set default values for the element calibration parameters
//
// Inputs: inElementRef - the IOHIDElementRef for this element
//
// Returns: nothing
//
void IOHIDElement_SetupCalibration( IOHIDElementRef inIOHIDElementRef )
{
// these are the min/max values returned by IOHIDValueGetScaledValue( v, kIOHIDValueScaleTypeCalibrated );
IOHIDElement_SetCalibrationMin( inIOHIDElementRef, IOHIDElementGetLogicalMin( inIOHIDElementRef ) );
IOHIDElement_SetCalibrationMax( inIOHIDElementRef, IOHIDElementGetLogicalMax( inIOHIDElementRef ) );
// this is the granularity of the values returned by IOHIDValueGetScaledValue( v, kIOHIDValueScaleTypeCalibrated );
// for example if set to 0.1 the values returned will be multiples of 0.1 ( 0.1, 0.2, 0.3, etc. )
IOHIDElement_SetCalibrationGranularity( inIOHIDElementRef, 0. );
// these define the dead zone (like in the middel of joystick axis)
IOHIDElement_SetCalibrationDeadZoneMin( inIOHIDElementRef, 0 );
IOHIDElement_SetCalibrationDeadZoneMax( inIOHIDElementRef, 0 );
#if 1
// get the current value of this element
double value = IOHIDElement_GetValue( inIOHIDElementRef, kIOHIDValueScaleTypePhysical );
// use it as our min/mas saturation
IOHIDElement_SetCalibrationSaturationMin( inIOHIDElementRef, value );
IOHIDElement_SetCalibrationSaturationMax( inIOHIDElementRef, value );
#else
// calculate the middle physical value we would expect from this element
CFIndex valueMin = IOHIDElementGetPhysicalMin( inIOHIDElementRef );
CFIndex valueMax = IOHIDElementGetPhysicalMax( inIOHIDElementRef );
CFIndex valueMid = ( valueMin + valueMax ) / 2;
// use it as our min/mas saturation
// this value determines the min/max values that have been recieved from the device element
IOHIDElement_SetCalibrationSaturationMin( inIOHIDElementRef, valueMid );
IOHIDElement_SetCalibrationSaturationMax( inIOHIDElementRef, valueMid );
// get the current value of this element
double value = IOHIDElement_GetValue( inIOHIDElementRef, kIOHIDValueScaleTypePhysical );
// and use it to adjust the current saturation values if it's outside their range
if ( value < IOHIDElement_GetCalibrationSaturationMin( inIOHIDElementRef ) ) {
IOHIDElement_SetCalibrationSaturationMin( inIOHIDElementRef, value );
}
if ( value > IOHIDElement_GetCalibrationSaturationMax( inIOHIDElementRef ) ) {
IOHIDElement_SetCalibrationSaturationMax( inIOHIDElementRef, value );
}
#endif
} // IOHIDElement_SetupCalibration
