Я пытаюсь использовать клавишу home на клавиатуре iOS для клавиши Esc. Я могу использовать IOHIDManager для чтения клавиш на клавиатуре, за исключением домашней клавиши iOS.
Насколько я понимаю, передача NULL в IOHIDManagerSetDeviceMatching должна соответствовать всем типам в IOHIDUsageTables , как показано ниже:
// clang -framework coreFoundation -framework IOKit ./HID.c -o hid
// sudo ./hid
#include <IOKit/hid/IOHIDManager.h>
#include <IOKit/hid/IOHIDValue.h>
void myHIDKeyboardCallback(void* context, IOReturn result, void* sender, IOHIDValueRef value)
{
IOHIDElementRef elem = IOHIDValueGetElement(value);
uint32_t scancode = IOHIDElementGetUsage(elem);
long pressed = IOHIDValueGetIntegerValue(value);
printf("scancode: %d, pressed: %ld\n", scancode, pressed);
}
int main(void)
{
IOHIDManagerRef hidManager = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone);
IOHIDManagerSetDeviceMatching(hidManager, NULL);
IOHIDManagerRegisterInputValueCallback(hidManager, myHIDKeyboardCallback, NULL);
IOHIDManagerScheduleWithRunLoop(hidManager, CFRunLoopGetMain(), kCFRunLoopDefaultMode);
IOHIDManagerOpen(hidManager, kIOHIDOptionsTypeNone);
CFRunLoopRun();
}
Использование PacketLogger.app (от Apple Hardware IO Tools) Я могу записать следующее, где первое нажатие клавиши - это клавиша home, а затем нажатие клавиши тильды.
[Jan 16 18:31:06.631] [HII receive] HID Interrupt: [A1] Unknown [03] Event Data [ 01 00 00 ]
[Jan 16 18:31:06.730] [HII receive] HID Interrupt: [A1] Unknown [03] Event Data [ 00 00 00 ]
[Jan 16 18:31:07.805] [HII receive] HID Interrupt: [A1] Keyboard [01] Event Data [ 00 00 35 00 00 00 00 00 ]
[Jan 16 18:31:07.905] [HII receive] HID Interrupt: [A1] Keyboard [01] Event Data [ 00 00 00 00 00 00 00 00 ]
Возможно, из-за события Unknown он недоступен через IOHIDManager.
Создание расширения ядра и чтение напрямую с Bluetooth также может быть вариантом, вот расширенное ведение журнала сверху:
[Jan 16 18:31:06.631] [HII receive] HID Interrupt: [A1] Unknown [03] Event Data [ 01 00 00 ]
HID Interrupt: [A1] Unknown [03] Event Data [ 01 00 00 ]
[Jan 16 18:31:06.631] [L2CAP RECEIVE] Channel ID: 0x0041 Length: 0x0005 (05) [ A1 03 01 00 00 ]
Channel ID: 0x0041 Length: 0x0005 (05) [ A1 03 01 00 00 ]
00000000: 0500 4100 a103 0100 00 ..A......
[Jan 16 18:31:06.631] [ACL RECEIVE] Data [Handle: 0x000B, Packet Boundary Flags: 0x2, Length: 0x0009 (9)]
Data [Handle: 0x000B, Packet Boundary Flags: 0x2, Length: 0x0009 (9)]
Packet Boundary Flags: [10] 0x02 - First packet of Higher Layer Message (i.e. start of an L2CAP packet)
Broadcast Flags: [00] 0x00 - Point-to-point
Data (0x0009 bytes)
[Jan 16 18:31:06.631] [ACL RECEIVE] 00000000: 0b20 0900 0500 4100 a103 0100 00 . ....A......
00000000: 0b20 0900 0500 4100 a103 0100 00 . ....A......
[Jan 16 18:31:06.730] [HII receive] HID Interrupt: [A1] Unknown [03] Event Data [ 00 00 00 ]
HID Interrupt: [A1] Unknown [03] Event Data [ 00 00 00 ]
[Jan 16 18:31:06.730] [L2CAP RECEIVE] Channel ID: 0x0041 Length: 0x0005 (05) [ A1 03 00 00 00 ]
Channel ID: 0x0041 Length: 0x0005 (05) [ A1 03 00 00 00 ]
00000000: 0500 4100 a103 0000 00 ..A......
[Jan 16 18:31:06.730] [ACL RECEIVE] Data [Handle: 0x000B, Packet Boundary Flags: 0x2, Length: 0x0009 (9)]
Data [Handle: 0x000B, Packet Boundary Flags: 0x2, Length: 0x0009 (9)]
Packet Boundary Flags: [10] 0x02 - First packet of Higher Layer Message (i.e. start of an L2CAP packet)
Broadcast Flags: [00] 0x00 - Point-to-point
Data (0x0009 bytes)
[Jan 16 18:31:06.730] [ACL RECEIVE] 00000000: 0b20 0900 0500 4100 a103 0000 00 . ....A......
00000000: 0b20 0900 0500 4100 a103 0000 00 . ....A......
[Jan 16 18:31:07.805] [HII receive] HID Interrupt: [A1] Keyboard [01] Event Data [ 00 00 35 00 00 00 00 00 ]
HID Interrupt: [A1] Keyboard [01] Event Data [ 00 00 35 00 00 00 00 00 ]
Modifier keys 00
NUM_LOCK [FALSE]
CAPS_LOCK [FALSE]
SCROLL_LOCK [FALSE]
COMPOSE [FALSE]
KANA [FALSE]
Reserved 00
Keycode 1 35 Keycode 2 00 Keycode 3 00 Keycode 4 00 Keycode 5 00 Keycode 6 00
[Jan 16 18:31:07.805] [L2CAP RECEIVE] Channel ID: 0x0041 Length: 0x000A (10) [ A1 01 00 00 35 00 00 00 00 00 ]
Channel ID: 0x0041 Length: 0x000A (10) [ A1 01 00 00 35 00 00 00 00 00 ]
00000000: 0a00 4100 a101 0000 3500 0000 0000 ..A.....5.....
[Jan 16 18:31:07.805] [ACL RECEIVE] Data [Handle: 0x000B, Packet Boundary Flags: 0x2, Length: 0x000E (14)]
Data [Handle: 0x000B, Packet Boundary Flags: 0x2, Length: 0x000E (14)]
Packet Boundary Flags: [10] 0x02 - First packet of Higher Layer Message (i.e. start of an L2CAP packet)
Broadcast Flags: [00] 0x00 - Point-to-point
Data (0x000e bytes)
[Jan 16 18:31:07.805] [ACL RECEIVE] 00000000: 0b20 0e00 0a00 4100 a101 0000 3500 0000 . ....A.....5...
00000000: 0b20 0e00 0a00 4100 a101 0000 3500 0000 . ....A.....5...
00000010: 0000 ..
[Jan 16 18:31:07.905] [HII receive] HID Interrupt: [A1] Keyboard [01] Event Data [ 00 00 00 00 00 00 00 00 ]
HID Interrupt: [A1] Keyboard [01] Event Data [ 00 00 00 00 00 00 00 00 ]
Modifier keys 00
NUM_LOCK [FALSE]
CAPS_LOCK [FALSE]
SCROLL_LOCK [FALSE]
COMPOSE [FALSE]
KANA [FALSE]
Reserved 00
Keycode 1 00 Keycode 2 00 Keycode 3 00 Keycode 4 00 Keycode 5 00 Keycode 6 00
[Jan 16 18:31:07.905] [L2CAP RECEIVE] Channel ID: 0x0041 Length: 0x000A (10) [ A1 01 00 00 00 00 00 00 00 00 ]
Channel ID: 0x0041 Length: 0x000A (10) [ A1 01 00 00 00 00 00 00 00 00 ]
00000000: 0a00 4100 a101 0000 0000 0000 0000 ..A...........
[Jan 16 18:31:07.905] [ACL RECEIVE] Data [Handle: 0x000B, Packet Boundary Flags: 0x2, Length: 0x000E (14)]
Data [Handle: 0x000B, Packet Boundary Flags: 0x2, Length: 0x000E (14)]
Packet Boundary Flags: [10] 0x02 - First packet of Higher Layer Message (i.e. start of an L2CAP packet)
Broadcast Flags: [00] 0x00 - Point-to-point
Data (0x000e bytes)
[Jan 16 18:31:07.905] [ACL RECEIVE] 00000000: 0b20 0e00 0a00 4100 a101 0000 0000 0000 . ....A.........
00000000: 0b20 0e00 0a00 4100 a101 0000 0000 0000 . ....A.........
00000010: 0000 ..