168 lines
5.2 KiB
C
168 lines
5.2 KiB
C
/*
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Copyright 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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#include <stdbool.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include "news.h"
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void news_init(void)
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{
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NEWS_KBD_RX_INIT();
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}
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// RX ring buffer
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#define RBUF_SIZE 8
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static uint8_t rbuf[RBUF_SIZE];
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static uint8_t rbuf_head = 0;
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static uint8_t rbuf_tail = 0;
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uint8_t news_recv(void)
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{
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uint8_t data = 0;
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if (rbuf_head == rbuf_tail) {
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return 0;
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}
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data = rbuf[rbuf_tail];
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rbuf_tail = (rbuf_tail + 1) % RBUF_SIZE;
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return data;
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}
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// USART RX complete interrupt
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ISR(NEWS_KBD_RX_VECT)
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{
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uint8_t next = (rbuf_head + 1) % RBUF_SIZE;
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if (next != rbuf_tail) {
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rbuf[rbuf_head] = NEWS_KBD_RX_DATA;
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rbuf_head = next;
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}
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}
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/*
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SONY NEWS Keyboard Protocol
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===========================
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Resources
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---------
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Mouse protocol of NWA-5461(Japanese)
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http://groups.google.com/group/fj.sys.news/browse_thread/thread/a01b3e3ac6ae5b2d
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SONY NEWS Info(Japanese)
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http://katsu.watanabe.name/doc/sonynews/
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Pinouts
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-------
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EIA 232 male connector from NWP-5461
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-------------
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\ 1 2 3 4 5 /
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\ 6 7 8 9 /
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---------
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1 VCC
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2 BZ(Speaker)
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3 Keyboard Data(from keyboard MCU TxD)
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4 NC
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5 GND
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6 Unknown Input(to keyboard MCU RxD via schmitt trigger)
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7 Mouse Data(from Mouse Ext connector)
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8 Unknown Input(to Keyboard MCU Input via diode and buffer)
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9 FG
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NOTE: Two LED on keyboard are controlled by pin 6,8?
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EIA 232 male connector from NWP-411A
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-------------
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\ 1 2 3 4 5 /
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\ 6 7 8 9 /
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---------
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1 VCC
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2 BZ(Speaker)
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3 Keyboard Data(from keyboard MCU TxD)
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4 NC
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5 GND
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6 NC
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7 Mouse Data(from Mouse Ext connector)
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8 NC
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9 FG
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NOTE: These are just from my guess and not confirmed.
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Signaling
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---------
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~~~~~~~~~~ ____XOO0X111X222X333X444X555X666X777~~~~ ~~~~~~~
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Idle Start LSB MSB Stop Idle
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Idle: High
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Start bit: Low
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Stop bit: High
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Bit order: LSB first
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Baud rate: 9600
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Interface: TTL level(5V) UART
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NOTE: This is observed on NWP-5461 with its DIP switch all OFF.
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Format
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------
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MSB LSB
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7 6 5 4 3 2 1 0 bit
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| | | | | | | |
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| +-+-+-+-+-+-+-- scan code(00-7F)
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+---------------- break flag: sets when released
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Scan Codes
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----------
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SONY NEWS NWP-5461
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,---. ,------------------------, ,------------------------. ,---------.
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| 7A| | 01 | 02 | 03 | 04 | 05 | | 06 | 07 | 08 | 09 | 0A | | 68 | 69 | ,-----------.
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`---' `------------------------' `------------------------' `---------' | 64| 65| 52|
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,-------------------------------------------------------------. ,---. ,---------------|
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| 0B| 0C| 0D| 0E| 0F| 10| 11| 12| 13| 14| 15| 16| 17| 18| 19 | | 6A| | 4B| 4C| 4D| 4E|
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|-------------------------------------------------------------| |---| |---------------|
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| 1A | 1B| 1C| 1D| 1E| 1F| 20| 21| 22| 23| 24| 25| 26| 27| | | 6B| | 4F| 50| 51| 56|
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|---------------------------------------------------------' | |---| |---------------|
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| 28 | 29| 2A| 2B| 2C| 2D| 2E| 2F| 30| 31| 32| 33| 34| 35 | | 6C| | 53| 54| 55| |
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|-------------------------------------------------------------| |---| |-----------| 5A|
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| 36 | 37| 38| 39| 3A| 3B| 3C| 3D| 3E| 3F| 40| 41| 42 | | 6D| | 57| 59| 58| |
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|-------------------------------------------------------------| |---| |---------------|
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| 43 | 44 | 45 | 46 | 47 | 48| 49| 4A | | 6E| | 66| 5B| 5C| 5D|
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`-------------------------------------------------------------' `---' `---------------'
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*/
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