From 9ae9742ac59b18cf989370f53d669daeb75bd7a3 Mon Sep 17 00:00:00 2001 From: tmk Date: Mon, 25 Nov 2013 17:43:26 +0900 Subject: [PATCH] Add ps2_busywait.c and recfactor PS/2 protocol --- converter/ps2_usb/matrix.c | 28 ++++-- protocol.mk | 2 +- protocol/ps2.c | 65 +++++++++----- protocol/ps2.h | 142 ++++++++++++++++++++++++----- protocol/ps2_busywait.c | 179 +++++++++++++++++++++++++++++++++++++ 5 files changed, 363 insertions(+), 53 deletions(-) create mode 100644 protocol/ps2_busywait.c 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 . #include #include #include +#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(); @@ -163,23 +166,11 @@ 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(); -#endif - /* terminate a transmission if we have */ - inhibit(); - _delay_us(100); - - /* release lines(idle state) */ - idle(); - - /* wait start bit */ - wait_clock_lo(25000); // command response may take 20 ms at most - data = recv_data(); - - inhibit(); + uint8_t try = 200; + while (try-- && (data = ps2_host_recv())) ; return data; } #endif @@ -187,7 +178,17 @@ uint8_t ps2_host_recv_response(void) #ifndef PS2_USE_INT uint8_t ps2_host_recv(void) { - return ps2_host_recv_response(); + uint8_t data = 0; + + /* release lines(idle state) */ + idle(); + + /* wait start bit */ + wait_clock_lo(100); // TODO: this is enough? + data = recv_data(); + + inhibit(); + return data; } #else /* ring buffer to store ps/2 key data */ @@ -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 +Copyright 2010,2011,2012,2013 Jun WAKO This software is licensed with a Modified BSD License. All of this is supposed to be Free Software, Open Source, DFSG-free, @@ -37,12 +37,60 @@ POSSIBILITY OF SUCH DAMAGE. #ifndef PS2_H #define PS2_H + +#include +#include +#include + /* * 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 */ +#define PS2_ACK 0xFA +#define PS2_RESEND 0xFE +#define PS2_SET_LED 0xED + +#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 +#define PS2_LED_CAPS_LOCK 2 -/* port settings for clock and data line */ +extern uint8_t ps2_error; + +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); + + +/* Check port settings for clock and data line */ #if !(defined(PS2_CLOCK_PORT) && \ defined(PS2_CLOCK_PIN) && \ defined(PS2_CLOCK_DDR) && \ @@ -57,27 +105,79 @@ POSSIBILITY OF SUCH DAMAGE. # 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 +/*-------------------------------------------------------------------- + * static functions + *------------------------------------------------------------------*/ +static inline void clock_lo(void) +{ + PS2_CLOCK_PORT &= ~(1< + +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 +#include +#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< PS2_ERR_STARTBIT3) { + printf("x%02X\n", ps2_error); + } + inhibit(); + return 0; +}