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Diffstat (limited to 'protocol/next_kbd.c')
| -rw-r--r-- | protocol/next_kbd.c | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/protocol/next_kbd.c b/protocol/next_kbd.c deleted file mode 100644 index a5a07a7a85..0000000000 --- a/protocol/next_kbd.c +++ /dev/null @@ -1,204 +0,0 @@ -/* - -NeXT non-ADB Keyboard Protocol - -Copyright 2013, Benjamin Gould (bgould@github.com) - -Based on: -TMK firmware code Copyright 2011,2012 Jun WAKO <wakojun@gmail.com> -Arduino code by "Ladyada" Limor Fried (http://ladyada.net/, http://adafruit.com/), released under BSD license - -Timing reference thanks to http://m0115.web.fc2.com/ (dead link), http://cfile7.uf.tistory.com/image/14448E464F410BF22380BB -Pinouts thanks to http://www.68k.org/~degs/nextkeyboard.html -Keycodes from http://ftp.netbsd.org/pub/NetBSD/NetBSD-release-6/src/sys/arch/next68k/dev/ - -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 <stdint.h> -#include <stdbool.h> -#include <util/atomic.h> -#include <util/delay.h> -#include "next_kbd.h" -#include "debug.h" - -static inline void out_lo(void); -static inline void out_hi(void); -static inline void query(void); -static inline void reset(void); -static inline uint32_t response(void); - -#define out_hi_delay(intervals) do { out_hi(); _delay_us(NEXT_KBD_TIMING * intervals); } while (0); -#define out_lo_delay(intervals) do { out_lo(); _delay_us(NEXT_KBD_TIMING * intervals); } while (0); -#define query_delay(intervals) do { query(); _delay_us(NEXT_KBD_TIMING * intervals); } while (0); -#define reset_delay(intervals) do { reset(); _delay_us(NEXT_KBD_TIMING * intervals); } while (0); - -void next_kbd_init(void) -{ - out_hi(); - NEXT_KBD_IN_DDR &= ~(1<<NEXT_KBD_IN_BIT); // KBD_IN to input - NEXT_KBD_IN_PORT |= (1<<NEXT_KBD_IN_BIT); // KBD_IN pull up - - query_delay(5); - reset_delay(8); - - query_delay(5); - reset_delay(8); -} - -void next_kbd_set_leds(bool left, bool right) -{ - out_lo_delay(9); - - out_hi_delay(3); - out_lo_delay(1); - - if (left) { - out_hi_delay(1); - } else { - out_lo_delay(1); - } - - if (right) { - out_hi_delay(1); - } else { - out_lo_delay(1); - } - - out_lo_delay(7); - out_hi(); -} - -#define NEXT_KBD_READ (NEXT_KBD_IN_PIN&(1<<NEXT_KBD_IN_BIT)) -uint32_t next_kbd_recv(void) -{ - - // First check to make sure that the keyboard is actually connected; - // if not, just return - // TODO: reflect the status of the keyboard in a return code - if (!NEXT_KBD_READ) { - sei(); - return 0; - } - - query(); - uint32_t resp = response(); - - return resp; -} - -static inline uint32_t response(void) -{ - cli(); - - // try a 5ms read; this should be called after the query method has - // been run so if a key is pressed we should get a response within - // 5ms; if not then send a reset and exit - uint8_t i = 0; - uint32_t data = 0; - uint16_t reset_timeout = 50000; - while (NEXT_KBD_READ && reset_timeout) { - asm(""); _delay_us(1); reset_timeout--; - } - if (!reset_timeout) { - reset(); - sei(); - return 0; - } - _delay_us(NEXT_KBD_TIMING / 2); - for (; i < 22; i++) - { - if (NEXT_KBD_READ) - { - data |= ((uint32_t) 1 << i); - /* Note: - * My testing with the ATmega32u4 showed that there might - * something wrong with the timing here; by the end of the - * second data byte some of the modifiers can get bumped out - * to the next bit over if we just cycle through the data - * based on the expected interval. There is a bit (i = 10) - * in the middle of the data that is always on followed by - * one that is always off - so we'll use that to reset our - * timing in case we've gotten ahead of the keyboard; - */ - if (i == 10) - { - i++; - while (NEXT_KBD_READ) ; - _delay_us(NEXT_KBD_TIMING / 2); - } - } else { - /* redundant - but I don't want to remove if it might screw - * up the timing - */ - data |= ((uint32_t) 0 << i); - } - _delay_us(NEXT_KBD_TIMING); - } - - sei(); - - return data; -} - -static inline void out_lo(void) -{ - NEXT_KBD_OUT_PORT &= ~(1<<NEXT_KBD_OUT_BIT); - NEXT_KBD_OUT_DDR |= (1<<NEXT_KBD_OUT_BIT); -} - -static inline void out_hi(void) -{ - /* input with pull up */ - NEXT_KBD_OUT_DDR &= ~(1<<NEXT_KBD_OUT_BIT); - NEXT_KBD_OUT_PORT |= (1<<NEXT_KBD_OUT_BIT); -} - -static inline void query(void) -{ - out_lo_delay(5); - out_hi_delay(1); - out_lo_delay(3); - out_hi(); -} - -static inline void reset(void) -{ - out_lo_delay(1); - out_hi_delay(4); - out_lo_delay(1); - out_hi_delay(6); - out_lo_delay(10); - out_hi(); -} |