/* File: HID_Utilities_External.h Contains: Definition of the HID Utilities exported functions External interface for HID Utilities, can be used with either library or source Check notes below for usage. Some type casting is required so library is framework and carbon free DRI: George Warner Copyright: Copyright © 2002 Apple Computer, Inc., All Rights Reserved Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in consideration of your agreement to the following terms, and your use, installation, modification or redistribution of this Apple software constitutes acceptance of these terms. If you do not agree with these terms, please do not use, install, modify or redistribute this Apple software. 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typedef enum IOHIDElementType IOHIDElementType; enum IOHIDReportType { kIOHIDReportTypeInput = 0, kIOHIDReportTypeOutput, kIOHIDReportTypeFeature, kIOHIDReportTypeCount }; typedef enum IOHIDReportType IOHIDReportType; typedef void (*IOHIDCallbackFunction)(void * target, unsigned long result, void* refcon, void * sender); typedef void* IOHIDEventStruct; #else #include #endif TARGET_RT_MAC_CFM #if 0 #include #include "PID.h" // NOTE: These are now in #include "IOHIDPowerUsage.h" // NOTE: These are now in #endif #include // ================================== // Device and Element Interfaces typedef enum HIDElementTypeMask { kHIDElementTypeInput = 1 << 1, kHIDElementTypeOutput = 1 << 2, kHIDElementTypeFeature = 1 << 3, kHIDElementTypeCollection = 1 << 4, kHIDElementTypeIO = kHIDElementTypeInput | kHIDElementTypeOutput | kHIDElementTypeFeature, kHIDElementTypeAll = kHIDElementTypeIO | kHIDElementTypeCollection }HIDElementTypeMask; struct recElement { unsigned long type; // the type defined by IOHIDElementType in IOHIDKeys.h long usagePage; // usage page from IOUSBHIDParser.h which defines general usage long usage; // usage within above page from IOUSBHIDParser.h which defines specific usage void * cookie; // unique value (within device of specific vendorID and productID) which identifies element, will NOT change long min; // reported min value possible long max; // reported max value possible long scaledMin; // reported scaled min value possible long scaledMax; // reported scaled max value possible long size; // size in bits of data return from element unsigned char relative; // are reports relative to last report (deltas) unsigned char wrapping; // does element wrap around (one value higher than max is min) unsigned char nonLinear; // are the values reported non-linear relative to element movement unsigned char preferredState; // does element have a preferred state (such as a button) unsigned char nullState; // does element have null state long units; // units value is reported in (not used very often) long unitExp; // exponent for units (also not used very often) char name[256]; // name of element (c string) // runtime variables long initialCenter; // center value at start up unsigned char hasCenter; // whether or not to use center for calibration long minReport; // min returned value long maxReport; // max returned value (calibrate call) long userMin; // user set value to scale to (scale call) long userMax; struct recElement * pPrevious; // previous element (NULL at list head) struct recElement * pChild; // next child (only of collections) struct recElement * pSibling; // next sibling (for elements and collections) long depth; }; typedef struct recElement recElement; typedef recElement* pRecElement; struct recDevice { void * interface; // interface to device, NULL = no interface void * queue; // device queue, NULL = no queue void * queueRunLoopSource; // device queue run loop source, NULL == no source void * transaction; // output transaction interface, NULL == no interface void * notification; // notifications char transport[256]; // device transport (c string) long vendorID; // id for device vendor, unique across all devices long productID; // id for particular product, unique across all of a vendors devices long version; // version of product char manufacturer[256]; // name of manufacturer char product[256]; // name of product char serial[256]; // serial number of specific product, can be assumed unique across specific product or specific vendor (not used often) long locID; // long representing location in USB (or other I/O) chain which device is pluged into, can identify specific device on machine long usage; // usage page from IOUSBHID Parser.h which defines general usage long usagePage; // usage within above page from IOUSBHID Parser.h which defines specific usage long totalElements; // number of total elements (should be total of all elements on device including collections) (calculated, not reported by device) long features; // number of elements of type kIOHIDElementTypeFeature long inputs; // number of elements of type kIOHIDElementTypeInput_Misc or kIOHIDElementTypeInput_Button or kIOHIDElementTypeInput_Axis or kIOHIDElementTypeInput_ScanCodes long outputs; // number of elements of type kIOHIDElementTypeOutput long collections; // number of elements of type kIOHIDElementTypeCollection long axis; // number of axis (calculated, not reported by device) long buttons; // number of buttons (calculated, not reported by device) long hats; // number of hat switches (calculated, not reported by device) long sliders; // number of sliders (calculated, not reported by device) long dials; // number of dials (calculated, not reported by device) long wheels; // number of wheels (calculated, not reported by device) recElement* pListElements; // head of linked list of elements struct recDevice* pNext; // next device }; typedef struct recDevice recDevice; typedef recDevice* pRecDevice; // ================================== // HID Utilities interface // ================================== // Create and open an interface to device, required prior to extracting values or building queues // Note: appliction now owns the device and must close and release it prior to exiting extern unsigned long HIDCreateOpenDeviceInterface (UInt32 hidDevice, pRecDevice pDevice); // builds list of device with elements (allocates memory and captures devices) // list is allcoated internally within HID Utilites and can be accessed via accessor functions // structures within list are considered flat and user accessable, butnot user modifiable // can be called again to rebuild list to account for new devices (will do the right thing in case of disposing existing list) // usagePage, usage are each a numDeviceTypes sized array of matching usage and usage pages // returns true if succesful extern Boolean HIDBuildMultiDeviceList (UInt32 *pUsagePage, UInt32 *pUsage, UInt32 numDeviceTypes); // same as above but this uses a single usagePage and usage extern Boolean HIDBuildDeviceList (UInt32 usagePage, UInt32 usage); // updates the current device list for any new/removed devices // if this is called before HIDBuildDeviceList the it functions like HIDBuildMultiDeviceList // usagePage, usage are each a numDeviceTypes sized array of matching usage and usage pages // returns true if successful which means if any device were added or removed (the device config changed) extern Boolean HIDUpdateDeviceList (UInt32 *pUsagePage, UInt32 *pUsage, UInt32 numDeviceTypes); // release list built by above function // MUST be called prior to application exit to properly release devices // if not called (or app crashes) devices can be recovered by pluging into different location in USB chain extern void HIDReleaseDeviceList (void); // does a device list exist extern Boolean HIDHaveDeviceList (void); // how many HID devices have been found // returns 0 if no device list exist extern UInt32 HIDCountDevices (void); // how many elements does a specific device have // returns 0 if device is invalid or NULL // uses mask of HIDElementTypeMask to restrict element found // use kHIDElementTypeIO to get non-collection elements extern UInt32 HIDCountDeviceElements (pRecDevice pDevice, HIDElementTypeMask typeMask); // get the first device in the device list // returns NULL if no list exists extern pRecDevice HIDGetFirstDevice (void); // get next device in list given current device as parameter // returns NULL if end of list extern pRecDevice HIDGetNextDevice (pRecDevice pDevice); // get the first element of device passed in as parameter // returns NULL if no list exists or device does not exists or is NULL // uses mask of HIDElementTypeMask to restrict element found // use kHIDElementTypeIO to get previous HIDGetFirstDeviceElement functionality extern pRecElement HIDGetFirstDeviceElement (pRecDevice pDevice, HIDElementTypeMask typeMask); // get next element of given device in list given current element as parameter // will walk down each collection then to next element or collection (depthwise traverse) // returns NULL if end of list // uses mask of HIDElementTypeMask to restrict element found // use kHIDElementTypeIO to get previous HIDGetNextDeviceElement functionality extern pRecElement HIDGetNextDeviceElement (pRecElement pElement, HIDElementTypeMask typeMask); // get previous element of given device in list given current element as parameter // this walks directly up the tree to the top element and does not search at each level // returns NULL if beginning of list // uses mask of HIDElementTypeMask to restrict element found // use kHIDElementTypeIO to get non-collection elements extern pRecElement HIDGetPreviousDeviceElement (pRecElement pElement, HIDElementTypeMask typeMask); // ================================== // Name Lookup Interfaces // returns C string type name given a type enumeration passed in as parameter (see IOHIDKeys.h) // returns empty string for invlid types extern void HIDGetTypeName (IOHIDElementType theType, char * cstrName); // set name from vendor id/product id look up (using cookies) extern Boolean HIDGetElementNameFromVendorProductCookie (const long vendorID, const long productID, const long cookie, char * pName); // set name from vendor id/product id look up (using usage page & usage) extern Boolean HIDGetElementNameFromVendorProductUsage (const long vendorID, const long productID, const long pUsagePage, const long pUsage, char * pName); // returns C string usage given usage page and usage passed in as parameters (see IOUSBHIDParser.h) // returns usage page and usage values in string form for unknown values extern void HIDGetUsageName (long valueUsagePage, long valueUsage, char * cstrName); // --------------------------------- // convert an element type to a mask extern HIDElementTypeMask HIDConvertElementTypeToMask (const long type); // find this device extern Boolean HIDFindDevice(const pRecDevice pSearchDevice, pRecDevice *ppFoundDevice); // find the device and element for this action // Device: serial, vendorID, productID, location, usagePage, usage // Element: cookie, usagePage, usage, extern Boolean HIDFindActionDeviceAndElement(const pRecDevice pSearchDevice, const pRecElement pSearchElement, pRecDevice *ppFoundDevice, pRecElement *ppFoundElement); // find the device and element for this action // Device: serial, vendorID, productID, location, usagePage, usage // Element: cookie, usagePage, usage, extern Boolean HIDFindSubElement(const pRecElement pStartElement, const pRecElement pSearchElement, pRecElement *ppFoundElement); // print out all of an elements information extern int HIDPrintElement(const pRecElement pElement); // return true if this is a valid device pointer extern Boolean HIDIsValidDevice(const pRecDevice pSearchDevice); // return true if this is a valid element pointer for this device extern Boolean HIDIsValidElement(const pRecDevice pSearchDevice, const pRecElement pSearchElement); // ================================== // Element Event Queue and Value Interfaces enum { kDefaultUserMin = 0, // default user min and max used for scaling kDefaultUserMax = 255 }; enum { kDeviceQueueSize = 50 // this is wired kernel memory so should be set to as small as possible // but should account for the maximum possible events in the queue // USB updates will likely occur at 100 Hz so one must account for this rate of // if states change quickly (updates are only posted on state changes) }; // ================================== // queues specific element, performing any device queue set up required extern unsigned long HIDQueueElement (pRecDevice pDevice, pRecElement pElement); // adds all elements to queue, performing any device queue set up required extern unsigned long HIDQueueDevice (pRecDevice pDevice); // removes element for queue, if last element in queue will release queue and device extern unsigned long HIDDequeueElement (pRecDevice pDevice, pRecElement pElement); // completely removes all elements from queue and releases queue and device extern unsigned long HIDDequeueDevice (pRecDevice pDevice); // releases all device queues for quit or rebuild (must be called) extern unsigned long HIDReleaseAllDeviceQueues (void); // releases interface to device, should be done prior to exiting application (called from HIDReleaseDeviceList) extern unsigned long HIDCloseReleaseInterface (pRecDevice pDevice); // returns true if an event is avialable for the element and fills out *pHIDEvent structure, returns false otherwise // pHIDEvent is a poiner to a IOHIDEventStruct, using void here for compatibility, users can cast a required extern unsigned char HIDGetEvent (pRecDevice pDevice, void * pHIDEvent); // returns current value for element, creating device interface as required, polling element extern long HIDGetElementValue (pRecDevice pDevice, pRecElement pElement); // Set an elements value // NOTE: This should only be used when a single element report needs to be sent. // If multiple elements reports are to be send then transactions should be used. // pIOHIDEvent is a poiner to a IOHIDEventStruct, using void here for compatibility, users can cast a required extern long HIDSetElementValue (pRecDevice pDevice, pRecElement pElement,void* pIOHIDEvent); // Set a callback to be called when a queue goes from empty to non-empty extern long HIDSetQueueCallback (pRecDevice pDevice, IOHIDCallbackFunction callback,void* callbackTarget, void* callbackRefcon); #if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_2 // Get a report from a device extern long HIDGetReport (pRecDevice pDevice,const IOHIDReportType reportType, const unsigned long reportID, void* reportBuffer, unsigned long* reportBufferSize); // Send a report to a device extern long HIDSetReport (pRecDevice pDevice,const IOHIDReportType reportType, const unsigned long reportID, void* reportBuffer, const unsigned long reportBufferSize); #endif MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_2 // ================================== // HUD utilities interfaces // returns calibrated value given raw value passed in // calibrated value is equal to min and max values returned by HIDGetElementValue since device list built scaled to element reported min and max values extern SInt32 HIDCalibrateValue (SInt32 value, pRecElement pElement); // returns scaled value given raw value passed in // scaled value is equal to current value assumed to be in the range of element reported min and max values scaled to user min and max scaled values extern SInt32 HIDScaleValue (SInt32 value, pRecElement pElement); // ================================== // Conguration and Save Interfaces enum { kPercentMove = 10 // precent of overall range a element must move to register }; typedef struct recSaveHID { long actionCookie; // device // need to add serial number when I have a test case long vendorID; long productID; long locID; long usage; long usagePage; // elements long usagePageE; long usageE; void * cookie; }recSaveHID,*pRecSaveHID; // polls all devices and elements for a change greater than kPercentMove. Times out after given time // returns true and pointer to device and element if found // returns false and NULL for both parameters if not found extern unsigned char HIDConfigureAction (pRecDevice * ppDevice, pRecElement * ppElement, float timeout); // -- These are routines to use if the applcation wants HID Utilities to do the file handling -- // Note: the FILE* is a MachO posix FILE and will not work with the MW MSL FILE* type. // take input records, save required info // assume file is open and at correct position. extern void HIDSaveElementConfig (FILE* fileRef, pRecDevice pDevice, pRecElement pElement, long actionCookie); // take file, read one record (assume file position is correct and file is open) // search for matching device // return pDevice, pElement and cookie for action extern long HIDRestoreElementConfig (FILE* fileRef, pRecDevice * ppDevice, pRecElement * ppElement); // -- These routines use the CFPreferences API's. // Save the device & element values into the specified key in the specified applications preferences extern Boolean HIDSaveElementPref (CFStringRef keyCFStringRef, CFStringRef appCFStringRef, pRecDevice pDevice, pRecElement pElement); // Find the specified preference in the specified application // search for matching device and element // return pDevice, pElement that matches extern Boolean HIDRestoreElementPref (CFStringRef keyCFStringRef, CFStringRef appCFStringRef, pRecDevice * ppDevice, pRecElement * ppElement); // -- These are routines to use if the client wants to use their own file handling -- // 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 extern void HIDSetElementConfig (pRecSaveHID pConfigRec, pRecDevice pDevice, pRecElement pElement, long actionCookie); // Get matching element from config record // takes a pre-allocated and filled out config record // search for matching device // return pDevice, pElement and cookie for action extern long HIDGetElementConfig (pRecSaveHID pConfigRec, pRecDevice * ppDevice, pRecElement * ppElement); // ================================== // Output Transaction interface // Create and open an transaction interface to device, required prior to extracting values or building Transactions extern unsigned long HIDTransactionAddElement(pRecDevice pDevice, pRecElement pElement); // removes an element from a Transaction extern unsigned long HIDTransactionRemoveElement(pRecDevice pDevice, pRecElement pElement); // return true if this transaction contains this element extern Boolean HIDTransactionHasElement(pRecDevice pDevice, pRecElement pElement); /* This changes the default value of an element, when the values of the */ /* elements are cleared, on clear or commit, they are reset to the */ /* default value */ /* This call can be made on elements that are not in the transaction, but */ /* has undefined behavior if made on elements not in the transaction */ /* which are later added to the transaction. */ /* In other words, an element should be added before its default is */ /* set, for well defined behavior. */ // pHIDEvent is a poiner to a IOHIDEventStruct, using void here for compatibility, users can cast a required extern unsigned long HIDTransactionSetElementDefault(pRecDevice pDevice, pRecElement pElement,IOHIDEventStruct* pValueEvent); /* Get the current setting of an element's default value */ // pHIDEvent is a poiner to a IOHIDEventStruct, using void here for compatibility, users can cast a required extern unsigned long HIDTransactionGetElementDefault(pRecDevice pDevice, pRecElement pElement,IOHIDEventStruct* pValueEvent); /* Add a change to the transaction, by setting an element value */ /* The change is not actually made until it is commited */ /* The element must be part of the transaction or this call will fail */ // pHIDEvent is a poiner to a IOHIDEventStruct, using void here for compatibility, users can cast a required extern unsigned long HIDTransactionSetElementValue(pRecDevice pDevice, pRecElement pElement,IOHIDEventStruct* pValueEvent); /* Get the current setting of an element value */ // pHIDEvent is a poiner to a IOHIDEventStruct, using void here for compatibility, users can cast a required extern unsigned long HIDTransactionGetElementValue(pRecDevice pDevice, pRecElement pElement,IOHIDEventStruct* pValueEvent); /* Commit the transaction, or clear all the changes and start over */ /* timoutMS is the timeout in milliseconds, a zero timeout will cause */ /* this call to be non-blocking (returning queue empty) if there */ /* is a NULL callback, and blocking forever until the queue is */ /* non-empty if their is a valid callback */ /* callback, if non-NULL is a callback to be called when data is */ /* inserted to the queue */ /* callbackTarget and callbackRefcon are passed to the callback */ extern unsigned long HIDTransactionCommit(pRecDevice pDevice); /* Clear all the changes and start over */ extern unsigned long HIDTransactionClear(pRecDevice pDevice); // ================================== #pragma options align=reset #ifdef PRAGMA_IMPORT_OFF #pragma import off #elif PRAGMA_IMPORT #pragma import reset #endif #ifdef __cplusplus } #endif // ================================== #endif // _HID_Utilities_External_h_