diff options
| -rw-r--r-- | converter/ps2_usb/matrix.c | 28 | ||||
| -rw-r--r-- | protocol.mk | 2 | ||||
| -rw-r--r-- | protocol/ps2.c | 59 | ||||
| -rw-r--r-- | protocol/ps2.h | 144 | ||||
| -rw-r--r-- | protocol/ps2_busywait.c | 179 |
5 files changed, 361 insertions, 51 deletions
diff --git a/converter/ps2_usb/matrix.c b/converter/ps2_usb/matrix.c index 4187ea060..a4c27f5d5 100644 --- a/converter/ps2_usb/matrix.c +++ b/converter/ps2_usb/matrix.c @@ -19,6 +19,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. #include <stdbool.h> #include <avr/io.h> #include <util/delay.h> +#include "action.h" #include "print.h" #include "util.h" #include "debug.h" @@ -185,8 +186,8 @@ uint8_t matrix_scan(void) matrix_break(PAUSE); } - uint8_t code; - while ((code = ps2_host_recv())) { + uint8_t code = ps2_host_recv(); + if (!ps2_error) { switch (state) { case INIT: switch (code) { @@ -207,11 +208,17 @@ uint8_t matrix_scan(void) matrix_make(PRINT_SCREEN); state = INIT; break; + case 0x00: // Overrun [3]p.25 + print("Overrun\n"); + clear_keyboard(); + state = INIT; + break; default: // normal key make if (code < 0x80) { matrix_make(code); } else { - debug("unexpected scan code at INIT: "); debug_hex(code); debug("\n"); + printf("unexpected scan code at INIT: %02X\n", code); + clear_keyboard(); } state = INIT; } @@ -232,7 +239,8 @@ uint8_t matrix_scan(void) if (code < 0x80) { matrix_make(code|0x80); } else { - debug("unexpected scan code at E0: "); debug_hex(code); debug("\n"); + printf("unexpected scan code at E0: %02X\n", code); + clear_keyboard(); } state = INIT; } @@ -251,7 +259,8 @@ uint8_t matrix_scan(void) if (code < 0x80) { matrix_break(code); } else { - debug("unexpected scan code at F0: "); debug_hex(code); debug("\n"); + printf("unexpected scan code at F0: %02X\n", code); + clear_keyboard(); } state = INIT; } @@ -266,7 +275,8 @@ uint8_t matrix_scan(void) if (code < 0x80) { matrix_break(code|0x80); } else { - debug("unexpected scan code at E0_F0: "); debug_hex(code); debug("\n"); + printf("unexpected scan code at E0_F0: %02X\n", code); + clear_keyboard(); } state = INIT; } @@ -357,7 +367,11 @@ uint8_t matrix_scan(void) default: state = INIT; } - phex(code); + } + + if (ps2_error > PS2_ERR_STARTBIT3) { + uint8_t ret = ps2_host_send(PS2_RESEND); + printf("Resend: %02X\n", ret); } return 1; } diff --git a/protocol.mk b/protocol.mk index 0d5f06c7e..e33200873 100644 --- a/protocol.mk +++ b/protocol.mk @@ -8,7 +8,7 @@ ifdef PS2_MOUSE_ENABLE endif ifdef PS2_USE_BUSYWAIT - SRC += protocol/ps2.c + SRC += protocol/ps2_busywait.c OPT_DEFS += -DPS2_USE_BUSYWAIT endif diff --git a/protocol/ps2.c b/protocol/ps2.c index e5873a9bf..4886b16d0 100644 --- a/protocol/ps2.c +++ b/protocol/ps2.c @@ -91,6 +91,9 @@ uint8_t ps2_error = PS2_ERR_NONE; void ps2_host_init(void) { + // POR(150-2000ms) plus BAT(300-500ms) may take 2.5sec([3]p.20) + _delay_ms(2500); + #ifdef PS2_USE_INT PS2_INT_INIT(); PS2_INT_ON(); @@ -163,32 +166,30 @@ ERROR: /* receive data when host want else inhibit communication */ uint8_t ps2_host_recv_response(void) { + // Command might take 20ms to response([3]p.21) + // TrackPoint might take 25ms ([5]2.7) uint8_t data = 0; - -#ifdef PS2_USE_INT - PS2_INT_OFF(); + uint8_t try = 200; + while (try-- && (data = ps2_host_recv())) ; + return data; +} #endif - /* terminate a transmission if we have */ - inhibit(); - _delay_us(100); + +#ifndef PS2_USE_INT +uint8_t ps2_host_recv(void) +{ + uint8_t data = 0; /* release lines(idle state) */ idle(); /* wait start bit */ - wait_clock_lo(25000); // command response may take 20 ms at most + wait_clock_lo(100); // TODO: this is enough? data = recv_data(); inhibit(); return data; } -#endif - -#ifndef PS2_USE_INT -uint8_t ps2_host_recv(void) -{ - return ps2_host_recv_response(); -} #else /* ring buffer to store ps/2 key data */ #define PBUF_SIZE 32 @@ -241,13 +242,6 @@ static inline void pbuf_clear(void) /* get data received by interrupt */ uint8_t ps2_host_recv(void) { - if (ps2_error) { - print("x"); - phex(ps2_error); - ps2_host_send(0xFE); // request to resend - ps2_error = PS2_ERR_NONE; - } - idle(); return pbuf_dequeue(); } @@ -450,3 +444,26 @@ static inline void inhibit(void) clock_lo(); data_hi(); } + + +/* PS/2 Resources + * + * [1] The PS/2 Mouse/Keyboard Protocol + * http://www.computer-engineering.org/ps2protocol/ + * Concise and thorough primer of PS/2 protocol. + * + * [2] Keyboard and Auxiliary Device Controller + * http://www.mcamafia.de/pdf/ibm_hitrc07.pdf + * Signal Timing and Format + * + * [3] Keyboards(101- and 102-key) + * http://www.mcamafia.de/pdf/ibm_hitrc11.pdf + * Keyboard Layout, Scan Code Set, POR, and Commands. + * + * [4] PS/2 Reference Manuals + * http://www.mcamafia.de/pdf/ibm_hitrc07.pdf + * Collection of IBM Personal System/2 documents. + * + * [5] TrackPoint Engineering Specifications for version 3E + * https://web.archive.org/web/20100526161812/http://wwwcssrv.almaden.ibm.com/trackpoint/download.html + */ diff --git a/protocol/ps2.h b/protocol/ps2.h index 834165356..b780d01a2 100644 --- a/protocol/ps2.h +++ b/protocol/ps2.h @@ -1,5 +1,5 @@ /* -Copyright 2010,2011 Jun WAKO <wakojun@gmail.com> +Copyright 2010,2011,2012,2013 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, @@ -37,32 +37,44 @@ POSSIBILITY OF SUCH DAMAGE. #ifndef PS2_H #define PS2_H + +#include <stdbool.h> +#include <util/delay.h> +#include <avr/io.h> + /* * Primitive PS/2 Library for AVR + * + * PS/2 Resources + * -------------- + * [1] The PS/2 Mouse/Keyboard Protocol + * http://www.computer-engineering.org/ps2protocol/ + * Concise and thorough primer of PS/2 protocol. + * + * [2] Keyboard and Auxiliary Device Controller + * http://www.mcamafia.de/pdf/ibm_hitrc07.pdf + * Signal Timing and Format + * + * [3] Keyboards(101- and 102-key) + * http://www.mcamafia.de/pdf/ibm_hitrc11.pdf + * Keyboard Layout, Scan Code Set, POR, and Commands. + * + * [4] PS/2 Reference Manuals + * http://www.mcamafia.de/pdf/ibm_hitrc07.pdf + * Collection of IBM Personal System/2 documents. + * + * [5] TrackPoint Engineering Specifications for version 3E + * https://web.archive.org/web/20100526161812/http://wwwcssrv.almaden.ibm.com/trackpoint/download.html */ - - -/* port settings for clock and data line */ -#if !(defined(PS2_CLOCK_PORT) && \ - defined(PS2_CLOCK_PIN) && \ - defined(PS2_CLOCK_DDR) && \ - defined(PS2_CLOCK_BIT)) -# error "PS/2 clock port setting is required in config.h" -#endif - -#if !(defined(PS2_DATA_PORT) && \ - defined(PS2_DATA_PIN) && \ - defined(PS2_DATA_DDR) && \ - defined(PS2_DATA_BIT)) -# error "PS/2 data port setting is required in config.h" -#endif - #define PS2_ACK 0xFA #define PS2_RESEND 0xFE #define PS2_SET_LED 0xED -#define PS2_ERR_NONE 0 -#define PS2_ERR_PARITY 0x10 +#define PS2_ERR_NONE 0 +#define PS2_ERR_STARTBIT1 1 +#define PS2_ERR_STARTBIT2 2 +#define PS2_ERR_STARTBIT3 3 +#define PS2_ERR_PARITY 0x10 #define PS2_LED_SCROLL_LOCK 0 #define PS2_LED_NUM_LOCK 1 @@ -71,13 +83,101 @@ POSSIBILITY OF SUCH DAMAGE. extern uint8_t ps2_error; -/* host role */ void ps2_host_init(void); uint8_t ps2_host_send(uint8_t data); uint8_t ps2_host_recv_response(void); uint8_t ps2_host_recv(void); void ps2_host_set_led(uint8_t usb_led); -/* device role */ + +/* Check port settings for clock and data line */ +#if !(defined(PS2_CLOCK_PORT) && \ + defined(PS2_CLOCK_PIN) && \ + defined(PS2_CLOCK_DDR) && \ + defined(PS2_CLOCK_BIT)) +# error "PS/2 clock port setting is required in config.h" +#endif + +#if !(defined(PS2_DATA_PORT) && \ + defined(PS2_DATA_PIN) && \ + defined(PS2_DATA_DDR) && \ + defined(PS2_DATA_BIT)) +# error "PS/2 data port setting is required in config.h" +#endif + +/*-------------------------------------------------------------------- + * static functions + *------------------------------------------------------------------*/ +static inline void clock_lo(void) +{ + PS2_CLOCK_PORT &= ~(1<<PS2_CLOCK_BIT); + PS2_CLOCK_DDR |= (1<<PS2_CLOCK_BIT); +} +static inline void clock_hi(void) +{ + /* input with pull up */ + PS2_CLOCK_DDR &= ~(1<<PS2_CLOCK_BIT); + PS2_CLOCK_PORT |= (1<<PS2_CLOCK_BIT); +} +static inline bool clock_in(void) +{ + PS2_CLOCK_DDR &= ~(1<<PS2_CLOCK_BIT); + PS2_CLOCK_PORT |= (1<<PS2_CLOCK_BIT); + _delay_us(1); + return PS2_CLOCK_PIN&(1<<PS2_CLOCK_BIT); +} +static inline void data_lo(void) +{ + PS2_DATA_PORT &= ~(1<<PS2_DATA_BIT); + PS2_DATA_DDR |= (1<<PS2_DATA_BIT); +} +static inline void data_hi(void) +{ + /* input with pull up */ + PS2_DATA_DDR &= ~(1<<PS2_DATA_BIT); + PS2_DATA_PORT |= (1<<PS2_DATA_BIT); +} +static inline bool data_in(void) +{ + PS2_DATA_DDR &= ~(1<<PS2_DATA_BIT); + PS2_DATA_PORT |= (1<<PS2_DATA_BIT); + _delay_us(1); + return PS2_DATA_PIN&(1<<PS2_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; +} + +/* idle state that device can send */ +static inline void idle(void) +{ + clock_hi(); + data_hi(); +} + +/* inhibit device to send */ +static inline void inhibit(void) +{ + clock_lo(); + data_hi(); +} #endif diff --git a/protocol/ps2_busywait.c b/protocol/ps2_busywait.c new file mode 100644 index 000000000..1e2925889 --- /dev/null +++ b/protocol/ps2_busywait.c @@ -0,0 +1,179 @@ +/* +Copyright 2010,2011,2012,2013 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 <util/delay.h> +#include "ps2.h" +#include "debug.h" + + +/* + * PS/2 protocol busywait version + */ + +#define WAIT(stat, us, err) do { \ + if (!wait_##stat(us)) { \ + ps2_error = err; \ + goto ERROR; \ + } \ +} while (0) + +uint8_t ps2_error = PS2_ERR_NONE; + + +void ps2_host_init(void) +{ + // POR(150-2000ms) plus BAT(300-500ms) may take 2.5sec([3]p.20) + _delay_ms(2500); + + inhibit(); +} + +uint8_t ps2_host_send(uint8_t data) +{ + uint8_t res = 0; + bool parity = true; + ps2_error = PS2_ERR_NONE; + /* terminate a transmission if we have */ + inhibit(); + _delay_us(200); // at least 100us + + /* start bit [1] */ + data_lo(); + clock_hi(); + WAIT(clock_lo, 20000, 10); // may take 15ms at most until device starts clocking + /* data [2-9] */ + for (uint8_t i = 0; i < 8; i++) { + _delay_us(15); + if (data&(1<<i)) { + parity = !parity; + data_hi(); + } else { + data_lo(); + } + WAIT(clock_hi, 50, 2); + WAIT(clock_lo, 50, 3); + } + /* parity [10] */ + _delay_us(15); + if (parity) { data_hi(); } else { data_lo(); } + WAIT(clock_hi, 50, 4); + WAIT(clock_lo, 50, 5); + /* stop bit [11] */ + _delay_us(15); + data_hi(); + /* ack [12] */ + WAIT(data_lo, 50, 6); + WAIT(clock_lo, 50, 7); + + /* wait for idle state */ + WAIT(clock_hi, 50, 8); + WAIT(data_hi, 50, 9); + + res = ps2_host_recv_response(); +ERROR: + inhibit(); + return res; +} + +/* receive data when host want else inhibit communication */ +uint8_t ps2_host_recv_response(void) +{ + // TODO: + // Command might take 20ms to response([3]p.21) + // TrackPoint might take 25ms ([5]2.7) + uint8_t data = 0; + uint8_t try = 200; + while (try-- && (data = ps2_host_recv())) ; + return data; +} + +/* send LED state to keyboard */ +void ps2_host_set_led(uint8_t led) +{ + ps2_host_send(0xED); + ps2_host_send(led); +} + + +/* called after start bit comes */ +uint8_t ps2_host_recv(void) +{ + uint8_t data = 0; + bool parity = true; + ps2_error = PS2_ERR_NONE; + + /* release lines(idle state) */ + idle(); + + /* start bit [1] */ + WAIT(clock_lo, 100, 1); // TODO: this is enough? + WAIT(data_lo, 1, 2); + WAIT(clock_hi, 50, 3); + + /* data [2-9] */ + for (uint8_t i = 0; i < 8; i++) { + WAIT(clock_lo, 50, 4); + if (data_in()) { + parity = !parity; + data |= (1<<i); + } + WAIT(clock_hi, 50, 5); + } + + /* parity [10] */ + WAIT(clock_lo, 50, 6); + if (data_in() != parity) { + ps2_error = PS2_ERR_PARITY; + goto ERROR; + } + WAIT(clock_hi, 50, 7); + + /* stop bit [11] */ + WAIT(clock_lo, 50, 8); + WAIT(data_hi, 1, 9); + WAIT(clock_hi, 50, 10); + + inhibit(); + return data; +ERROR: + if (ps2_error > PS2_ERR_STARTBIT3) { + printf("x%02X\n", ps2_error); + } + inhibit(); + return 0; +} |