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ADB keyboard LEDs support

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This commit is contained in:
tmk 2011-01-13 22:46:57 +09:00
parent 40c24dc89a
commit 06db39583f
5 changed files with 60 additions and 13 deletions
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19
adb.c
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@ -42,9 +42,9 @@ uint16_t adb_host_kbd_recv(void)
{
uint16_t data = 0;
attention();
send_byte(0x2C); // Addr:2, Cmd:talk(11), Reg:0(00)
place_bit0(); // Stopbit
if (!wait_data_lo(0xFF)) // Stop to Start(140-260us)
send_byte(0x2C); // Addr:Keyboard(0010), Cmd:Talk(11), Register0(00)
place_bit0(); // Stopbit(0)
if (!wait_data_lo(0xFF)) // Tlt/Stop to Start(140-260us)
return 0; // No data to send
if (!read_bit()) // Startbit(1)
return -2;
@ -55,6 +55,19 @@ uint16_t adb_host_kbd_recv(void)
return data;
}
// send state of LEDs
void adb_host_kbd_led(uint8_t led)
{
attention();
send_byte(0x2A); // Addr:Keyboard(0010), Cmd:Listen(10), Register2(10)
place_bit0(); // Stopbit(0)
_delay_us(200); // Tlt/Stop to Start
place_bit1(); // Startbit(1)
send_byte(0); // send upper byte (not used)
send_byte(led&0x07); // send lower byte (bit2: ScrollLock, bit1: CapsLock, bit0: NumLock)
place_bit0(); // Stopbit(0);
}
static inline void data_lo()
{