I confirmed that I had successfully turned on the device and registered the callback method,
but the callback method was not successfully invoked when moving with Magic mouse.
What method does the Magic Mouse and Magic Trackpad need to use to get the input value of the device?
IOReturn ioReturn = IOHIDDeviceOpen(deviceRef, kIOHIDOptionsTypeNone);
if ( kIOReturnSuccess == ioReturn ) {
IOHIDDeviceRegisterInputValueCallback(deviceRef, mouseInputValueCallback, NULL);
}
static void mouseInputValueCallback(void *context, IOReturn result, void *sender, IOHIDValueRef value) {
NSLog(@"handle input value");
}
I passed the __IOHIDDeviceCopyMatchingInputElements get magic mouse input element
<__NSArrayM 0x6000012c4900>(
timestamp: 0 type: 1 usagePage: 1 usage: 48 reportID: 16 value: 0,
timestamp: 0 type: 1 usagePage: 1 usage: 49 reportID: 16 value: 0,
timestamp: 0 type: 2 usagePage: 9 usage: 1 reportID: 16 value: 0,
timestamp: 0 type: 2 usagePage: 9 usage: 2 reportID: 16 value: 0
)
(NSArray *)getHIDReprots {
if (!deviceRef) {
return nil;
}
NSMutableArray *reports = [[NSMutableArray alloc] init];
CFArrayRef elements;
CFIndex i;
elements = IOHIDDeviceCopyMatchingElements(deviceRef, NULL, kIOHIDOptionsTypeNone);
for (i = 0; i<CFArrayGetCount(elements); i++) {
const IOHIDElementRef element = (void*)CFArrayGetValueAtIndex(elements, i);
IOHIDElementType eleType = IOHIDElementGetType(element);
NSString *eleTypeStr = @"";
switch (eleType) {
case kIOHIDElementTypeInput_Misc:
eleTypeStr = @"kIOHIDElementTypeInput_Misc";
break;
case kIOHIDElementTypeInput_Button:
eleTypeStr = @"kIOHIDElementTypeInput_Button";
break;
case kIOHIDElementTypeInput_Axis:
eleTypeStr = @"kIOHIDElementTypeInput_Axis";
break;
case kIOHIDElementTypeInput_ScanCodes:
eleTypeStr = @"kIOHIDElementTypeInput_ScanCodes";
break;
case kIOHIDElementTypeInput_NULL:
eleTypeStr = @"kIOHIDElementTypeInput_NULL";
break;
case kIOHIDElementTypeOutput:
eleTypeStr = @"kIOHIDElementTypeOutput";
break;
case kIOHIDElementTypeFeature:
eleTypeStr = @"kIOHIDElementTypeFeature";
break;
case kIOHIDElementTypeCollection:
eleTypeStr = @"kIOHIDElementTypeCollection";
break;
default:
break;
}
uint32_t page = IOHIDElementGetUsagePage(element);
uint32_t usage = IOHIDElementGetUsage(element);
uint32_t reportID = IOHIDElementGetReportID(element);
uint32_t reportSize = IOHIDElementGetReportSize(element);
uint32_t reportCount = IOHIDElementGetReportCount(element);
NSString *elementStr = [[NSString alloc] initWithFormat:@" reportID:%d, reportSize:%d, type:%@, UsagePage:%d, usage:%d, reportCount:%d\n\n",reportID, reportSize, eleTypeStr, page, usage, reportCount];
[reports addObject:elementStr];
}
return reports;
}
reportID:0, reportSize:0, type:kIOHIDElementTypeCollection, UsagePage:1, usage:2, reportCount:1
reportID:0, reportSize:0, type:kIOHIDElementTypeCollection, UsagePage:1, usage:1, reportCount:1
reportID:16, reportSize:16, type:kIOHIDElementTypeInput_Misc, UsagePage:1, usage:48, reportCount:1
reportID:16, reportSize:16, type:kIOHIDElementTypeInput_Misc, UsagePage:1, usage:49, reportCount:1
reportID:16, reportSize:1, type:kIOHIDElementTypeInput_Button, UsagePage:9, usage:1, reportCount:1
reportID:16, reportSize:1, type:kIOHIDElementTypeInput_Button, UsagePage:9, usage:2, reportCount:1
reportID:71, reportSize:8, type:kIOHIDElementTypeFeature, UsagePage:6, usage:32, reportCount:1
reportID:85, reportSize:512, type:kIOHIDElementTypeFeature, UsagePage:65282, usage:85, reportCount:64
reportID:0, reportSize:0, type:kIOHIDElementTypeInput_NULL, UsagePage:0, usage:-1, reportCount:1
reportID:0, reportSize:1, type:kIOHIDElementTypeInput_NULL, UsagePage:0, usage:0, reportCount:1
reportID:16, reportSize:0, type:kIOHIDElementTypeInput_NULL, UsagePage:0, usage:-1, reportCount:1
reportID:16, reportSize:1, type:kIOHIDElementTypeInput_NULL, UsagePage:0, usage:0, reportCount:1
reportID:71, reportSize:0, type:kIOHIDElementTypeInput_NULL, UsagePage:0, usage:-1, reportCount:1
reportID:71, reportSize:1, type:kIOHIDElementTypeInput_NULL, UsagePage:0, usage:0, reportCount:1
reportID:85, reportSize:0, type:kIOHIDElementTypeInput_NULL, UsagePage:0, usage:-1, reportCount:1
reportID:85, reportSize:1, type:kIOHIDElementTypeInput_NULL, UsagePage:0, usage:0, reportCount:1
Devices:
VendorID ProductID LocationID UsagePage Usage RegistryID Transport Class Product UserClass Built-In
0x4c 0x265 0x3bab3ec3 1 2 0x100001ec4 Bluetooth AppleHSBluetoothHIDDriver Magic Trackpad (null) 0
0x4c 0x265 0x3bab3ec3 0 1 0x100001eb2 Bluetooth AppleHSBluetoothDevice Magic Trackpad (null) 0
0x5ac 0x30d 0x5abbb32b 1 2 0x100001221 Bluetooth BNBMouseDevice Magic Mouse (null) 0
0x4c 0x265 0x3bab3ec3 65280 3 0x100001ed2 Bluetooth AppleHSBluetoothHIDDriver Magic Trackpad (null) 0
0x4c 0x265 0x3bab3ec3 65280 13 0x100001ecc Bluetooth AppleHSBluetoothHIDDriver Magic Trackpad (null) 0
0x4c 0x265 0x3bab3ec3 65280 11 0x100001eba Bluetooth AppleHSBluetoothHIDDriver Magic Trackpad (null) 0