576 lines
21 KiB
C
576 lines
21 KiB
C
/*
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Copyright 2011,2012 Jun WAKO <wakojun@gmail.com>
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This software is licensed with a Modified BSD License.
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All of this is supposed to be Free Software, Open Source, DFSG-free,
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GPL-compatible, and OK to use in both free and proprietary applications.
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Additions and corrections to this file are welcome.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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* Neither the name of the copyright holders nor the names of
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/* M0110A Support was contributed by skagon@github */
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#include <stdbool.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <util/delay.h>
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#include "m0110.h"
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#include "debug.h"
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static inline uint8_t raw2scan(uint8_t raw);
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static inline uint8_t inquiry(void);
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static inline uint8_t instant(void);
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static inline void clock_lo(void);
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static inline void clock_hi(void);
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static inline bool clock_in(void);
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static inline void data_lo(void);
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static inline void data_hi(void);
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static inline bool data_in(void);
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static inline uint16_t wait_clock_lo(uint16_t us);
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static inline uint16_t wait_clock_hi(uint16_t us);
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static inline uint16_t wait_data_lo(uint16_t us);
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static inline uint16_t wait_data_hi(uint16_t us);
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static inline void idle(void);
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static inline void request(void);
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#define WAIT_US(stat, us, err) do { \
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if (!wait_##stat(us)) { \
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m0110_error = err; \
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goto ERROR; \
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} \
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} while (0)
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#define WAIT_MS(stat, ms, err) do { \
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uint16_t _ms = ms; \
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while (_ms) { \
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if (wait_##stat(1000)) { \
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break; \
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} \
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_ms--; \
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} \
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if (_ms == 0) { \
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m0110_error = err; \
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goto ERROR; \
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} \
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} while (0)
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#define KEY(raw) ((raw) & 0x7f)
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#define IS_BREAK(raw) (((raw) & 0x80) == 0x80)
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uint8_t m0110_error = 0;
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void m0110_init(void)
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{
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idle();
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_delay_ms(1000);
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/* Not needed to initialize in fact.
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uint8_t data;
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m0110_send(M0110_MODEL);
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data = m0110_recv();
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print("m0110_init model: "); phex(data); print("\n");
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m0110_send(M0110_TEST);
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data = m0110_recv();
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print("m0110_init test: "); phex(data); print("\n");
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*/
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}
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uint8_t m0110_send(uint8_t data)
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{
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m0110_error = 0;
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request();
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WAIT_MS(clock_lo, 250, 1); // keyboard may block long time
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for (uint8_t bit = 0x80; bit; bit >>= 1) {
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WAIT_US(clock_lo, 250, 3);
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if (data&bit) {
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data_hi();
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} else {
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data_lo();
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}
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WAIT_US(clock_hi, 200, 4);
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}
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_delay_us(100); // hold last bit for 80us
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idle();
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return 1;
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ERROR:
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print("m0110_send err: "); phex(m0110_error); print("\n");
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_delay_ms(500);
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idle();
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return 0;
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}
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uint8_t m0110_recv(void)
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{
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uint8_t data = 0;
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m0110_error = 0;
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WAIT_MS(clock_lo, 250, 1); // keyboard may block long time
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for (uint8_t i = 0; i < 8; i++) {
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data <<= 1;
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WAIT_US(clock_lo, 200, 2);
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WAIT_US(clock_hi, 200, 3);
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if (data_in()) {
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data |= 1;
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}
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}
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idle();
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return data;
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ERROR:
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print("m0110_recv err: "); phex(m0110_error); print("\n");
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_delay_ms(500);
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idle();
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return 0xFF;
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}
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/*
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Handling for exceptional case of key combinations for M0110A
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Shift and Calc/Arrow key could be operated simultaneously:
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Case Shift Arrow Events Interpret
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-------------------------------------------------------------------
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1 Down Down 71, 79, DD Calc(d)*a *b
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2 Down Up 71, 79, UU Arrow&Calc(u)*a
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3 Up Down F1, 79, DD Shift(u) *c
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4 Up Up F1, 79, UU Shift(u) and Arrow&Calc(u)*a
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Case Shift Calc Events Interpret
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-------------------------------------------------------------------
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5(1) Down Down 71, 71, 79, DD Shift(d) and Cacl(d)
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6(2) Down Up F1, 71, 79, UU Shift(u) and Arrow&Calc(u)*a
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7(1) Up Down F1, 71, 79, DD Shift(u) and Calc(d)
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8(4) Up Up F1, F1, 79, UU Shift(ux2) and Arrow&Calc(u)*a
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During Calc key is hold:
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Case Shift Arrow Events Interpret
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-------------------------------------------------------------------
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A(3) ---- Down F1, 79, DD Shift(u) *c
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B ---- Up 79, UU Arrow&Calc(u)*a
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C Down ---- F1, 71 Shift(u) and Shift(d)
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D Up ---- F1 Shift(u)
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E Hold Down 79, DD Normal
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F Hold Up 79, UU Arrow&Calc(u)*a
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G(1) Down Down F1, 71, 79, DD Shift(u)*b and Calc(d)*a
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H(2) Down Up F1, 71, 79, UU Shift(u) and Arrow&Calc(u)*a
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I(3) Up Down F1, F1, 79, DD Shift(ux2) *c
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J(4) Up Up F1, 79, UU Shift(u) and Arrow&Calc(u)*a
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Case Shift Calc Events Interpret
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-------------------------------------------------------------------
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K(1) ---- Down 71, 79, DD Calc(d)*a
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L(4) ---- Up F1, 79, UU Shift(u) and Arrow&Calc(u)*a
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M(1) Hold Down 71, 79, DD Calc(d)*a
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N Hold Up 79, UU Arrow&Calc(u)*a
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Where DD/UU indicates part of Keypad Down/Up event.
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*a: Impossible to distinguish btween Arrow and Calc event.
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*b: Shift(d) event is ignored.
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*c: Arrow/Calc(d) event is ignored.
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*/
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uint8_t m0110_recv_key(void)
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{
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static uint8_t keybuf = 0x00;
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static uint8_t keybuf2 = 0x00;
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static uint8_t rawbuf = 0x00;
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uint8_t raw, raw2, raw3;
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if (keybuf) {
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raw = keybuf;
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keybuf = 0x00;
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return raw;
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}
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if (keybuf2) {
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raw = keybuf2;
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keybuf2 = 0x00;
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return raw;
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}
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if (rawbuf) {
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raw = rawbuf;
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rawbuf = 0x00;
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} else {
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raw = instant(); // Use INSTANT for better response. Should be INQUIRY ?
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}
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switch (KEY(raw)) {
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case M0110_KEYPAD:
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raw2 = instant();
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switch (KEY(raw2)) {
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case M0110_ARROW_UP:
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case M0110_ARROW_DOWN:
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case M0110_ARROW_LEFT:
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case M0110_ARROW_RIGHT:
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if (IS_BREAK(raw2)) {
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// Case B,F,N:
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keybuf = (raw2scan(raw2) | M0110_CALC_OFFSET); // Calc(u)
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return (raw2scan(raw2) | M0110_KEYPAD_OFFSET); // Arrow(u)
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}
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break;
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}
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// Keypad or Arrow
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return (raw2scan(raw2) | M0110_KEYPAD_OFFSET);
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break;
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case M0110_SHIFT:
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raw2 = instant();
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switch (KEY(raw2)) {
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case M0110_SHIFT:
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// Case: 5-8,C,G,H
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rawbuf = raw2;
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return raw2scan(raw); // Shift(d/u)
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break;
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case M0110_KEYPAD:
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// Shift + Arrow, Calc, or etc.
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raw3 = instant();
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switch (KEY(raw3)) {
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case M0110_ARROW_UP:
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case M0110_ARROW_DOWN:
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case M0110_ARROW_LEFT:
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case M0110_ARROW_RIGHT:
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if (IS_BREAK(raw)) {
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if (IS_BREAK(raw3)) {
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// Case 4:
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print("(4)\n");
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keybuf2 = raw2scan(raw); // Shift(u)
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keybuf = (raw2scan(raw3) | M0110_CALC_OFFSET); // Calc(u)
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return (raw2scan(raw3) | M0110_KEYPAD_OFFSET); // Arrow(u)
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} else {
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// Case 3:
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print("(3)\n");
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return (raw2scan(raw)); // Shift(u)
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}
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} else {
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if (IS_BREAK(raw3)) {
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// Case 2:
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print("(2)\n");
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keybuf = (raw2scan(raw3) | M0110_CALC_OFFSET); // Calc(u)
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return (raw2scan(raw3) | M0110_KEYPAD_OFFSET); // Arrow(u)
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} else {
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// Case 1:
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print("(1)\n");
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return (raw2scan(raw3) | M0110_CALC_OFFSET); // Calc(d)
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}
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}
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break;
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default:
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// Shift + Keypad
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keybuf = (raw2scan(raw3) | M0110_KEYPAD_OFFSET);
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return raw2scan(raw); // Shift(d/u)
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break;
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}
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break;
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default:
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// Shift + Normal keys
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keybuf = raw2scan(raw2);
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return raw2scan(raw); // Shift(d/u)
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break;
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}
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break;
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default:
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// Normal keys
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return raw2scan(raw);
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break;
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}
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}
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static inline uint8_t raw2scan(uint8_t raw) {
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return (raw == M0110_NULL) ? M0110_NULL : (
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(raw == M0110_ERROR) ? M0110_ERROR : (
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((raw&0x80) | ((raw&0x7F)>>1))
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)
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);
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}
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static inline uint8_t inquiry(void)
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{
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m0110_send(M0110_INQUIRY);
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return m0110_recv();
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}
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static inline uint8_t instant(void)
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{
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m0110_send(M0110_INSTANT);
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uint8_t data = m0110_recv();
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if (data != M0110_NULL) {
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debug_hex(data); debug(" ");
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}
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return data;
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}
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static inline void clock_lo()
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{
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M0110_CLOCK_PORT &= ~(1<<M0110_CLOCK_BIT);
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M0110_CLOCK_DDR |= (1<<M0110_CLOCK_BIT);
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}
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static inline void clock_hi()
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{
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/* input with pull up */
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M0110_CLOCK_DDR &= ~(1<<M0110_CLOCK_BIT);
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M0110_CLOCK_PORT |= (1<<M0110_CLOCK_BIT);
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}
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static inline bool clock_in()
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{
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M0110_CLOCK_DDR &= ~(1<<M0110_CLOCK_BIT);
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M0110_CLOCK_PORT |= (1<<M0110_CLOCK_BIT);
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_delay_us(1);
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return M0110_CLOCK_PIN&(1<<M0110_CLOCK_BIT);
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}
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static inline void data_lo()
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{
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M0110_DATA_PORT &= ~(1<<M0110_DATA_BIT);
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M0110_DATA_DDR |= (1<<M0110_DATA_BIT);
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}
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static inline void data_hi()
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{
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/* input with pull up */
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M0110_DATA_DDR &= ~(1<<M0110_DATA_BIT);
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M0110_DATA_PORT |= (1<<M0110_DATA_BIT);
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}
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static inline bool data_in()
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{
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M0110_DATA_DDR &= ~(1<<M0110_DATA_BIT);
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M0110_DATA_PORT |= (1<<M0110_DATA_BIT);
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_delay_us(1);
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return M0110_DATA_PIN&(1<<M0110_DATA_BIT);
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}
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static inline uint16_t wait_clock_lo(uint16_t us)
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{
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while (clock_in() && us) { asm(""); _delay_us(1); us--; }
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return us;
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}
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static inline uint16_t wait_clock_hi(uint16_t us)
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{
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while (!clock_in() && us) { asm(""); _delay_us(1); us--; }
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return us;
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}
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static inline uint16_t wait_data_lo(uint16_t us)
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{
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while (data_in() && us) { asm(""); _delay_us(1); us--; }
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return us;
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}
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static inline uint16_t wait_data_hi(uint16_t us)
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{
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while (!data_in() && us) { asm(""); _delay_us(1); us--; }
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return us;
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}
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static inline void idle(void)
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{
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clock_hi();
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data_hi();
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}
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static inline void request(void)
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{
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clock_hi();
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data_lo();
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}
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/*
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Primitive M0110 Library for AVR
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==============================
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Signaling
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---------
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CLOCK is always from KEYBOARD. DATA are sent with MSB first.
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1) IDLE: both lines are high.
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CLOCK ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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DATA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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2) KEYBOARD->HOST: HOST reads bit on rising edge.
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CLOCK ~~~~~~~~~~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~~~~~~~~~
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DATA ~~~~~~~~~~~~X777777X666666X555555X444444X333333X222222X111111X000000X~~~~~~~
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<--> 160us(clock low)
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<---> 180us(clock high)
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3) HOST->KEYBOARD: HOST asserts bit on falling edge.
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CLOCK ~~~~~~~~~~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~~~~~~~~~
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DATA ~~~~~~|_____X777777X666666X555555X444444X333333X222222X111111X000000X~~~~~~~
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<----> 840us(request to send by host) <---> 80us(hold DATA)
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<--> 180us(clock low)
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<---> 220us(clock high)
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Protocol
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--------
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COMMAND:
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Inquiry 0x10 get key event with block
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Instant 0x12 get key event
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Model 0x14 get model number(M0110 responds with 0x09)
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bit 7 1 if another device connected(used when keypad exists?)
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bit4-6 next device model number
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bit1-3 keyboard model number
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bit 0 always 1
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Test 0x16 test(ACK:0x7D/NAK:0x77)
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KEY EVENT:
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bit 7 key state(0:press 1:release)
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bit 6-1 scan code(see below)
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bit 0 always 1
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To get scan code use this: ((bits&(1<<7)) | ((bits&0x7F))>>1).
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Note: On the M0110A, Keypad keys and Arrow keys are preceded by 0x79.
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Moreover, some Keypad keys(=, /, * and +) are preceded by 0x71 on press and 0xF1 on release.
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ARROW KEYS:
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Arrow keys and Calc keys(+,*,/,= on keypad) share same byte sequence and preceding byte of
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Calc keys(0x71 and 0xF1) means press and release event of SHIFT. This causes a very confusing situation,
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it is difficult or impossible to tell Calc key from Arrow key plus SHIFT in some cases.
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Raw key events:
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press release
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---------------- ----------------
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Left: 0x79, 0x0D 0x79, 0x8D
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Right: 0x79, 0x05 0x79, 0x85
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Up: 0x79, 0x1B 0x79, 0x9B
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Down: 0x79, 0x11 0x79, 0x91
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Pad+: 0x71, 0x79, 0x0D 0xF1, 0x79, 0x8D
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Pad*: 0x71, 0x79, 0x05 0xF1, 0x79, 0x85
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Pad/: 0x71, 0x79, 0x1B 0xF1, 0x79, 0x9B
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Pad=: 0x71, 0x79, 0x11 0xF1, 0x79, 0x91
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RAW CODE:
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M0110A
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,---------------------------------------------------------. ,---------------.
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| `| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| -| =|Bcksp| |Clr| =| /| *|
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|---------------------------------------------------------| |---------------|
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|Tab | Q| W| E| R| T| Y| U| I| O| P| [| ]| | | 7| 8| 9| -|
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|-----------------------------------------------------' | |---------------|
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|CapsLo| A| S| D| F| G| H| J| K| L| ;| '|Return| | 4| 5| 6| +|
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|---------------------------------------------------------| |---------------|
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|Shift | Z| X| C| V| B| N| M| ,| ,| /|Shft|Up | | 1| 2| 3| |
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|---------------------------------------------------------' |-----------|Ent|
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|Optio|Mac | Space | \|Lft|Rgt|Dn | | 0| .| |
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`---------------------------------------------------------' `---------------'
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,---------------------------------------------------------. ,---------------.
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| 65| 25| 27| 29| 2B| 2F| 2D| 35| 39| 33| 3B| 37| 31| 67| |+0F|*11|*1B|*05|
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|---------------------------------------------------------| |---------------|
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| 61| 19| 1B| 1D| 1F| 23| 21| 41| 45| 3F| 47| 43| 3D| | |+33|+37|+39|+1D|
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|-----------------------------------------------------' | |---------------|
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| 73| 01| 03| 05| 07| 0B| 09| 4D| 51| 4B| 53| 4F| 49| |+2D|+2F|+31|*0D|
|
|
|---------------------------------------------------------| |---------------|
|
|
| 71| 0D| 0F| 11| 13| 17| 5B| 5D| 27| 5F| 59| 71|+1B| |+27|+29|+2B| |
|
|
|---------------------------------------------------------' |-----------|+19|
|
|
| 75| 6F| 63 | 55|+0D|+05|+11| | +25|+03| |
|
|
`---------------------------------------------------------' `---------------'
|
|
+ 0x79, 0xDD / 0xF1, 0xUU
|
|
* 0x71, 0x79,DD / 0xF1, 0x79, 0xUU
|
|
|
|
|
|
MODEL NUMBER:
|
|
M0110: 0x09 00001001 : model number 4 (100)
|
|
M0110A: 0x0B 00001011 : model number 5 (101)
|
|
M0110 & M0120: ???
|
|
|
|
|
|
Scan Code
|
|
---------
|
|
m0110_recv_key() function returns following scan codes instead of raw key events.
|
|
Scan codes are 1 byte long and MSB(bit7) is set when key is released.
|
|
|
|
M0110
|
|
,---------------------------------------------------------.
|
|
| `| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| -| =|Backs|
|
|
|---------------------------------------------------------|
|
|
|Tab | Q| W| E| R| T| Y| U| I| O| P| [| ]| \|
|
|
|---------------------------------------------------------|
|
|
|CapsLo| A| S| D| F| G| H| J| K| L| ;| '|Return|
|
|
|---------------------------------------------------------|
|
|
|Shift | Z| X| C| V| B| N| M| ,| ,| /| |
|
|
`---------------------------------------------------------'
|
|
|Opt|Mac | Space |Enter|Opt|
|
|
`------------------------------------------------'
|
|
,---------------------------------------------------------.
|
|
| 32| 12| 13| 14| 15| 17| 16| 1A| 1C| 19| 1D| 1B| 18| 33|
|
|
|---------------------------------------------------------|
|
|
| 30| 0C| 0D| 0E| 0F| 10| 11| 20| 22| 1F| 23| 21| 1E| 2A|
|
|
|---------------------------------------------------------|
|
|
| 39| 00| 01| 02| 03| 05| 04| 26| 28| 25| 29| 27| 24|
|
|
|---------------------------------------------------------|
|
|
| 38| 06| 07| 08| 09| 0B| 2D| 2E| 2B| 2F| 2C| 38|
|
|
`---------------------------------------------------------'
|
|
| 3A| 37| 31 | 34| 3A|
|
|
`------------------------------------------------'
|
|
|
|
M0110A
|
|
,---------------------------------------------------------. ,---------------.
|
|
| `| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| -| =|Bcksp| |Clr| =| /| *|
|
|
|---------------------------------------------------------| |---------------|
|
|
|Tab | Q| W| E| R| T| Y| U| I| O| P| [| ]| | | 7| 8| 9| -|
|
|
|-----------------------------------------------------' | |---------------|
|
|
|CapsLo| A| S| D| F| G| H| J| K| L| ;| '|Return| | 4| 5| 6| +|
|
|
|---------------------------------------------------------| |---------------|
|
|
|Shift | Z| X| C| V| B| N| M| ,| ,| /|Shft|Up | | 1| 2| 3| |
|
|
|---------------------------------------------------------' |-----------|Ent|
|
|
|Optio|Mac | Space | \|Lft|Rgt|Dn | | 0| .| |
|
|
`---------------------------------------------------------' `---------------'
|
|
,---------------------------------------------------------. ,---------------.
|
|
| 32| 12| 13| 14| 15| 17| 16| 1A| 1C| 19| 1D| 1B| 18| 33| | 47| 68| 6D| 62|
|
|
|---------------------------------------------------------| |---------------|
|
|
| 30| 0C| 0D| 0E| 0F| 10| 11| 20| 22| 1F| 23| 21| 1E| | | 59| 5B| 5C| 4E|
|
|
|-----------------------------------------------------' | |---------------|
|
|
| 39| 00| 01| 02| 03| 05| 04| 26| 28| 25| 29| 27| 24| | 56| 57| 58| 66|
|
|
|---------------------------------------------------------| |---------------|
|
|
| 38| 06| 07| 08| 09| 0B| 2D| 2E| 2B| 2F| 2C| 38| 4D| | 53| 54| 55| |
|
|
|---------------------------------------------------------' |-----------| 4C|
|
|
| 3A| 37| 31 | 2A| 46| 42| 48| | 52| 41| |
|
|
`---------------------------------------------------------' `---------------'
|
|
|
|
|
|
References
|
|
----------
|
|
Technical Info for 128K/512K and Plus
|
|
ftp://ftp.apple.asimov.net/pub/apple_II/documentation/macintosh/Mac%20Hardware%20Info%20-%20Mac%20128K.pdf
|
|
ftp://ftp.apple.asimov.net/pub/apple_II/documentation/macintosh/Mac%20Hardware%20Info%20-%20Mac%20Plus.pdf
|
|
Protocol:
|
|
Page 20 of Tech Info for 128K/512K
|
|
http://www.mac.linux-m68k.org/devel/plushw.php
|
|
Connector:
|
|
Page 20 of Tech Info for 128K/512K
|
|
http://www.kbdbabel.org/conn/kbd_connector_macplus.png
|
|
Signaling:
|
|
http://www.kbdbabel.org/signaling/kbd_signaling_mac.png
|
|
http://typematic.blog.shinobi.jp/Entry/14/
|
|
Scan Codes:
|
|
Page 22 of Tech Info for 128K/512K
|
|
Page 07 of Tech Info for Plus
|
|
http://m0115.web.fc2.com/m0110.jpg
|
|
http://m0115.web.fc2.com/m0110a.jpg
|
|
*/
|