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adb: Fix for set LED

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ADB Manager documents p.5-28
> Register 2 contains sixteen bits; be sure to change only the three bits
> that represent the three LED lights.
https://developer.apple.com/library/archive/documentation/mac/pdf/Devices/ADB_Manager.pdf

iMate reads register2 before setting LED state for this.
https://github.com/tmk/tmk_keyboard/wiki/Apple-Desktop-Bus#set-led
This commit is contained in:
tmk 2022-04-25 18:05:13 +09:00
parent 0b3ee443ec
commit 083a008b66
1 changed files with 3 additions and 1 deletions
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4
tmk_core/protocol/adb.c
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@ -285,7 +285,9 @@ void adb_host_kbd_led(uint8_t addr, uint8_t led)
// Listen Register2 // Listen Register2
// upper byte: not used // upper byte: not used
// lower byte: bit2=ScrollLock, bit1=CapsLock, bit0=NumLock // lower byte: bit2=ScrollLock, bit1=CapsLock, bit0=NumLock
adb_host_listen(addr, 2, 0, led & 0x07); uint16_t reg2 = adb_host_talk(addr, 2);
_delay_us(400);
adb_host_listen(addr, 2, reg2 >> 8, (reg2 & 0xF8) | (led & 0x07));
} }