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Diffstat (limited to 'tmk_core/protocol/adb.c')
-rw-r--r--tmk_core/protocol/adb.c171
1 files changed, 66 insertions, 105 deletions
diff --git a/tmk_core/protocol/adb.c b/tmk_core/protocol/adb.c
index 5c6c99b4fc..a23c919619 100644
--- a/tmk_core/protocol/adb.c
+++ b/tmk_core/protocol/adb.c
@@ -42,11 +42,10 @@ POSSIBILITY OF SUCH DAMAGE.
#include <avr/interrupt.h>
#include "adb.h"
-
// GCC doesn't inline functions normally
-#define data_lo() (ADB_DDR |= (1<<ADB_DATA_BIT))
-#define data_hi() (ADB_DDR &= ~(1<<ADB_DATA_BIT))
-#define data_in() (ADB_PIN & (1<<ADB_DATA_BIT))
+#define data_lo() (ADB_DDR |= (1 << ADB_DATA_BIT))
+#define data_hi() (ADB_DDR &= ~(1 << ADB_DATA_BIT))
+#define data_in() (ADB_PIN & (1 << ADB_DATA_BIT))
#ifdef ADB_PSW_BIT
static inline void psw_lo(void);
@@ -54,18 +53,16 @@ static inline void psw_hi(void);
static inline bool psw_in(void);
#endif
-static inline void attention(void);
-static inline void place_bit0(void);
-static inline void place_bit1(void);
-static inline void send_byte(uint8_t data);
+static inline void attention(void);
+static inline void place_bit0(void);
+static inline void place_bit1(void);
+static inline void send_byte(uint8_t data);
static inline uint16_t wait_data_lo(uint16_t us);
static inline uint16_t wait_data_hi(uint16_t us);
static inline uint16_t adb_host_dev_recv(uint8_t device);
-
-void adb_host_init(void)
-{
- ADB_PORT &= ~(1<<ADB_DATA_BIT);
+void adb_host_init(void) {
+ ADB_PORT &= ~(1 << ADB_DATA_BIT);
data_hi();
#ifdef ADB_PSW_BIT
psw_hi();
@@ -73,10 +70,7 @@ void adb_host_init(void)
}
#ifdef ADB_PSW_BIT
-bool adb_host_psw(void)
-{
- return psw_in();
-}
+bool adb_host_psw(void) { return psw_in(); }
#endif
/*
@@ -105,11 +99,11 @@ bool adb_host_psw(void)
// bit0:
// 70us bit cell:
// ____________~~~~~~
-// 42-49 21-28
+// 42-49 21-28
//
// 130us bit cell:
// ____________~~~~~~
-// 78-91 39-52
+// 78-91 39-52
//
// bit1:
// 70us bit cell:
@@ -122,66 +116,50 @@ bool adb_host_psw(void)
//
// [from Apple IIgs Hardware Reference Second Edition]
-enum {
- ADDR_KEYB = 0x20,
- ADDR_MOUSE = 0x30
-};
+enum { ADDR_KEYB = 0x20, ADDR_MOUSE = 0x30 };
-uint16_t adb_host_kbd_recv(void)
-{
- return adb_host_dev_recv(ADDR_KEYB);
-}
+uint16_t adb_host_kbd_recv(void) { return adb_host_dev_recv(ADDR_KEYB); }
#ifdef ADB_MOUSE_ENABLE
-void adb_mouse_init(void) {
- return;
-}
+void adb_mouse_init(void) { return; }
-uint16_t adb_host_mouse_recv(void)
-{
- return adb_host_dev_recv(ADDR_MOUSE);
-}
+uint16_t adb_host_mouse_recv(void) { return adb_host_dev_recv(ADDR_MOUSE); }
#endif
-static inline uint16_t adb_host_dev_recv(uint8_t device)
-{
+static inline uint16_t adb_host_dev_recv(uint8_t device) {
uint16_t data = 0;
cli();
attention();
- send_byte(device|0x0C); // Addr:Keyboard(0010)/Mouse(0011), Cmd:Talk(11), Register0(00)
- place_bit0(); // Stopbit(0)
- if (!wait_data_hi(500)) { // Service Request(310us Adjustable Keyboard): just ignored
+ send_byte(device | 0x0C); // Addr:Keyboard(0010)/Mouse(0011), Cmd:Talk(11), Register0(00)
+ place_bit0(); // Stopbit(0)
+ if (!wait_data_hi(500)) { // Service Request(310us Adjustable Keyboard): just ignored
sei();
- return -30; // something wrong
+ return -30; // something wrong
}
- if (!wait_data_lo(500)) { // Tlt/Stop to Start(140-260us)
+ if (!wait_data_lo(500)) { // Tlt/Stop to Start(140-260us)
sei();
- return 0; // No data to send
+ return 0; // No data to send
}
-
- uint8_t n = 17; // start bit + 16 data bits
+
+ uint8_t n = 17; // start bit + 16 data bits
do {
- uint8_t lo = (uint8_t) wait_data_hi(130);
- if (!lo)
- goto error;
-
- uint8_t hi = (uint8_t) wait_data_lo(lo);
- if (!hi)
- goto error;
-
+ uint8_t lo = (uint8_t)wait_data_hi(130);
+ if (!lo) goto error;
+
+ uint8_t hi = (uint8_t)wait_data_lo(lo);
+ if (!hi) goto error;
+
hi = lo - hi;
lo = 130 - lo;
-
+
data <<= 1;
if (lo < hi) {
data |= 1;
- }
- else if (n == 17) {
+ } else if (n == 17) {
sei();
return -20;
}
- }
- while ( --n );
+ } while (--n);
// Stop bit can't be checked normally since it could have service request lenghtening
// and its high state never goes low.
@@ -197,76 +175,66 @@ error:
return -n;
}
-void adb_host_listen(uint8_t cmd, uint8_t data_h, uint8_t data_l)
-{
+void adb_host_listen(uint8_t cmd, uint8_t data_h, uint8_t data_l) {
cli();
attention();
send_byte(cmd);
- place_bit0(); // Stopbit(0)
- _delay_us(200); // Tlt/Stop to Start
- place_bit1(); // Startbit(1)
- send_byte(data_h);
+ place_bit0(); // Stopbit(0)
+ _delay_us(200); // Tlt/Stop to Start
+ place_bit1(); // Startbit(1)
+ send_byte(data_h);
send_byte(data_l);
- place_bit0(); // Stopbit(0);
+ place_bit0(); // Stopbit(0);
sei();
}
// send state of LEDs
-void adb_host_kbd_led(uint8_t led)
-{
+void adb_host_kbd_led(uint8_t led) {
// Addr:Keyboard(0010), Cmd:Listen(10), Register2(10)
// send upper byte (not used)
// send lower byte (bit2: ScrollLock, bit1: CapsLock, bit0:
- adb_host_listen(0x2A,0,led&0x07);
+ adb_host_listen(0x2A, 0, led & 0x07);
}
-
#ifdef ADB_PSW_BIT
-static inline void psw_lo()
-{
- ADB_DDR |= (1<<ADB_PSW_BIT);
- ADB_PORT &= ~(1<<ADB_PSW_BIT);
+static inline void psw_lo() {
+ ADB_DDR |= (1 << ADB_PSW_BIT);
+ ADB_PORT &= ~(1 << ADB_PSW_BIT);
}
-static inline void psw_hi()
-{
- ADB_PORT |= (1<<ADB_PSW_BIT);
- ADB_DDR &= ~(1<<ADB_PSW_BIT);
+static inline void psw_hi() {
+ ADB_PORT |= (1 << ADB_PSW_BIT);
+ ADB_DDR &= ~(1 << ADB_PSW_BIT);
}
-static inline bool psw_in()
-{
- ADB_PORT |= (1<<ADB_PSW_BIT);
- ADB_DDR &= ~(1<<ADB_PSW_BIT);
- return ADB_PIN&(1<<ADB_PSW_BIT);
+static inline bool psw_in() {
+ ADB_PORT |= (1 << ADB_PSW_BIT);
+ ADB_DDR &= ~(1 << ADB_PSW_BIT);
+ return ADB_PIN & (1 << ADB_PSW_BIT);
}
#endif
-static inline void attention(void)
-{
+static inline void attention(void) {
data_lo();
- _delay_us(800-35); // bit1 holds lo for 35 more
+ _delay_us(800 - 35); // bit1 holds lo for 35 more
place_bit1();
}
-static inline void place_bit0(void)
-{
+static inline void place_bit0(void) {
data_lo();
_delay_us(65);
data_hi();
_delay_us(35);
}
-static inline void place_bit1(void)
-{
+static inline void place_bit1(void) {
data_lo();
_delay_us(35);
data_hi();
_delay_us(65);
}
-static inline void send_byte(uint8_t data)
-{
+static inline void send_byte(uint8_t data) {
for (int i = 0; i < 8; i++) {
- if (data&(0x80>>i))
+ if (data & (0x80 >> i))
place_bit1();
else
place_bit0();
@@ -275,29 +243,22 @@ static inline void send_byte(uint8_t data)
// These are carefully coded to take 6 cycles of overhead.
// inline asm approach became too convoluted
-static inline uint16_t wait_data_lo(uint16_t us)
-{
+static inline uint16_t wait_data_lo(uint16_t us) {
do {
- if ( !data_in() )
- break;
+ if (!data_in()) break;
_delay_us(1 - (6 * 1000000.0 / F_CPU));
- }
- while ( --us );
+ } while (--us);
return us;
}
-static inline uint16_t wait_data_hi(uint16_t us)
-{
+static inline uint16_t wait_data_hi(uint16_t us) {
do {
- if ( data_in() )
- break;
+ if (data_in()) break;
_delay_us(1 - (6 * 1000000.0 / F_CPU));
- }
- while ( --us );
+ } while (--us);
return us;
}
-
/*
ADB Protocol
============
@@ -375,7 +336,7 @@ Commands
A A A A 1 1 R R Talk(read from a device)
The command to read keycodes from keyboard is 0x2C which
- consist of keyboard address 2 and Talk against register 0.
+ consist of keyboard address 2 and Talk against register 0.
Address:
2: keyboard
@@ -457,7 +418,7 @@ Keyboard Data(Register0)
Keyboard LEDs & state of keys(Register2)
This register hold current state of three LEDs and nine keys.
The state of LEDs can be changed by sending Listen command.
-
+
1514 . . . . . . 7 6 5 . 3 2 1 0
| | | | | | | | | | | | | | | +- LED1(NumLock)
| | | | | | | | | | | | | | +--- LED2(CapsLock)
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-16 20:14:18 +0000