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Diffstat (limited to 'm0110.c')
| -rw-r--r-- | m0110.c | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/m0110.c b/m0110.c new file mode 100644 index 000000000..725675ed8 --- /dev/null +++ b/m0110.c @@ -0,0 +1,304 @@ +/* +Copyright 2011 Jun WAKO <wakojun@gmail.com> + +This software is licensed with a Modified BSD License. +All of this is supposed to be Free Software, Open Source, DFSG-free, +GPL-compatible, and OK to use in both free and proprietary applications. +Additions and corrections to this file are welcome. + + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + +* Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + +* Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + +* Neither the name of the copyright holders nor the names of + contributors may be used to endorse or promote products derived + from this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +POSSIBILITY OF SUCH DAMAGE. +*/ + +#include <stdbool.h> +#include <avr/io.h> +#include <avr/interrupt.h> +#include <util/delay.h> +#include "m0110.h" +#include "debug.h" + + +static inline void clock_lo(void); +static inline void clock_hi(void); +static inline bool clock_in(void); +static inline void data_lo(void); +static inline void data_hi(void); +static inline bool data_in(void); +static inline uint16_t wait_clock_lo(uint16_t us); +static inline uint16_t wait_clock_hi(uint16_t us); +static inline uint16_t wait_data_lo(uint16_t us); +static inline uint16_t wait_data_hi(uint16_t us); +static inline void idle(void); +static inline void request(void); + + +/* +Primitive M0110 Library for AVR +============================== + + +Signaling +--------- +CLOCK is always from KEYBOARD. DATA are sent with MSB first. + +1) IDLE: both line is high. + CLOCK ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + DATA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +2) KEYBOARD->HOST: HOST reads bit on rising edge. + CLOCK ~~~~~~~~~~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~~~~~~~~~ + DATA ~~~~~~~~~~~~X777777X666666X555555X444444X333333X222222X111111X000000X~~~~~~~ + <--> 160us(clock low) + <---> 180us(clock high) + +3) HOST->KEYBOARD: HOST asserts bit on falling edge. + CLOCK ~~~~~~~~~~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~~~~~~~~~ + DATA ~~~~~~|_____X777777X666666X555555X444444X333333X222222X111111X000000X~~~~~~~ + <----> 840us(request to send by host) <-> 80us(hold DATA) + <--> 180us(clock low) + <---> 220us(clock high) + + +Protocol +-------- +COMMAND: + Inquiry 0x10 get key event + Instant 0x12 get key event + Model 0x14 get model number(M0110 responds with 0x09) + bit 7 1 if another device connected(used when keypad exists?) + bit4-6 next device model number + bit1-3 keyboard model number + bit 0 always 1 + Test 0x16 test(ACK:0x7D/NAK:0x77) + +KEY EVENT: + bit 7 key state(0:press 1:release) + bit 6-1 scan code + bit 0 always 1 + To get scan code, use ((bits&(1<<7)) | ((bits&7F))>>1). + +SCAN CODE: + M0110A + ,---------------------------------------------------------. + | `| 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| + `------------------------------------------------' + + +References +---------- +Protocol: + http://www.mac.linux-m68k.org/devel/plushw.php +Connector: + 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: + http://m0115.web.fc2.com/m0110.jpg + http://m0115.web.fc2.com/m0110a.jpg +*/ + + +#define WAIT(stat, us, err) do { \ + if (!wait_##stat(us)) { \ + m0110_error = err; \ + goto ERROR; \ + } \ +} while (0) + + +uint8_t m0110_error = 0; + + +void m0110_init(void) +{ + uint8_t data; + idle(); + _delay_ms(255); + + m0110_send(M0110_MODLE); + data = m0110_recv(); + print("m0110_init model: "); phex(data); print("\n"); + + m0110_send(M0110_TEST); + data = m0110_recv(); + print("m0110_init test: "); phex(data); print("\n"); +} + +uint8_t m0110_send(uint8_t data) +{ + m0110_error = 0; + + request(); + WAIT(clock_lo, 1000, 0); + for (uint8_t bit = 0x80; bit; bit >>= 1) { + WAIT(clock_lo, 250, 3); + _delay_us(15); + if (data&bit) { + data_hi(); + } else { + data_lo(); + } + WAIT(clock_hi, 200, 4); + } + _delay_us(100); // hold last bit for 80us + idle(); + return 1; +ERROR: + if (m0110_error) { + print("m0110_send err: "); phex(m0110_error); print("\n"); + } + idle(); + return 0; +} + +uint8_t m0110_recv(void) +{ + uint8_t data = 0; + m0110_error = 0; + + WAIT(clock_lo, -1, 0); // need 250ms? insted 0xffff(16bit max)us + for (uint8_t i = 0; i < 8; i++) { + data <<= 1; + WAIT(clock_lo, 200, 2); + WAIT(clock_hi, 200, 3); + if (data_in()) { + data |= 1; + } + } + idle(); + print("m0110_send recv data: "); phex(data); print("\n"); + return data; +ERROR: + if (m0110_error) { + print("m0110_recv err: "); phex(m0110_error); print("\n"); + } + idle(); + return 0xFF; +} + +uint8_t m0110_recv_key(void) +{ + uint8_t key; + m0110_send(M0110_INQUIRY); + key = m0110_recv(); + if (key == 0xFF || key == M0110_NULL) + return M0110_NULL; + else + return (key&(1<<7) | (key&0x7F)>>1); +} + + +static inline void clock_lo() +{ + M0110_CLOCK_PORT &= ~(1<<M0110_CLOCK_BIT); + M0110_CLOCK_DDR |= (1<<M0110_CLOCK_BIT); +} +static inline void clock_hi() +{ + /* input with pull up */ + M0110_CLOCK_DDR &= ~(1<<M0110_CLOCK_BIT); + M0110_CLOCK_PORT |= (1<<M0110_CLOCK_BIT); +} +static inline bool clock_in() +{ + M0110_CLOCK_DDR &= ~(1<<M0110_CLOCK_BIT); + M0110_CLOCK_PORT |= (1<<M0110_CLOCK_BIT); + _delay_us(1); + return M0110_CLOCK_PIN&(1<<M0110_CLOCK_BIT); +} +static inline void data_lo() +{ + M0110_DATA_PORT &= ~(1<<M0110_DATA_BIT); + M0110_DATA_DDR |= (1<<M0110_DATA_BIT); +} +static inline void data_hi() +{ + /* input with pull up */ + M0110_DATA_DDR &= ~(1<<M0110_DATA_BIT); + M0110_DATA_PORT |= (1<<M0110_DATA_BIT); +} +static inline bool data_in() +{ + M0110_DATA_DDR &= ~(1<<M0110_DATA_BIT); + M0110_DATA_PORT |= (1<<M0110_DATA_BIT); + _delay_us(1); + return M0110_DATA_PIN&(1<<M0110_DATA_BIT); +} + +static inline uint16_t wait_clock_lo(uint16_t us) +{ + while (clock_in() && us) { asm(""); _delay_us(1); us--; } + return us; +} +static inline uint16_t wait_clock_hi(uint16_t us) +{ + while (!clock_in() && us) { asm(""); _delay_us(1); us--; } + return us; +} +static inline uint16_t wait_data_lo(uint16_t us) +{ + while (data_in() && us) { asm(""); _delay_us(1); us--; } + return us; +} +static inline uint16_t wait_data_hi(uint16_t us) +{ + while (!data_in() && us) { asm(""); _delay_us(1); us--; } + return us; +} + +static inline void idle(void) +{ + clock_hi(); + data_hi(); +} + +static inline void request(void) +{ + clock_hi(); + data_lo(); +} |