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Added SHARP X68000 keyboard support.

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tmk 2012-03-24 01:43:37 +09:00
parent 446f87f9e8
commit 38d61ee1b1
8 changed files with 709 additions and 0 deletions
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85
x68k_usb/Makefile Normal file
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#
# Makefile for PJRC Teensy
#
# Target file name (without extension).
TARGET = x68k_usb_pjrc
# Directory common source filess exist
COMMON_DIR = ..
# Directory keyboard dependent files exist
TARGET_DIR = .
# keyboard dependent files
SRC = main.c \
keymap.c \
matrix.c \
led.c \
x68k.c
CONFIG_H = config_pjrc.h
# MCU name, you MUST set this to match the board you are using
# type "make clean" after changing this, so all files will be rebuilt
#MCU = at90usb162 # Teensy 1.0
MCU = atmega32u4 # Teensy 2.0
#MCU = at90usb646 # Teensy++ 1.0
#MCU = at90usb1286 # Teensy++ 2.0
# Processor frequency.
# Normally the first thing your program should do is set the clock prescaler,
# so your program will run at the correct speed. You should also set this
# variable to same clock speed. The _delay_ms() macro uses this, and many
# examples use this variable to calculate timings. Do not add a "UL" here.
F_CPU = 16000000
# Build Options
# *Comment out* to disable the options.
#
MOUSEKEY_ENABLE = yes # Mouse keys
EXTRAKEY_ENABLE = yes # Audio control and System control
NKRO_ENABLE = yes # USB Nkey Rollover
#---------------- Programming Options --------------------------
AVRDUDE = avrdude
# Type: avrdude -c ? to get a full listing.
AVRDUDE_PROGRAMMER = avr109
AVRDUDE_PORT = /dev/ttyACM0
AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
# Uncomment the following if you want avrdude's erase cycle counter.
# Note that this counter needs to be initialized first using -Yn,
# see avrdude manual.
#AVRDUDE_ERASE_COUNTER = -y
# Uncomment the following if you do /not/ wish a verification to be
# performed after programming the device.
#AVRDUDE_NO_VERIFY = -V
# Increase verbosity level. Please use this when submitting bug
# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude>
# to submit bug reports.
#AVRDUDE_VERBOSE = -v -v
AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)
#AVRDUDE_FLAGS = -p $(MCU) -c $(AVRDUDE_PROGRAMMER)
AVRDUDE_FLAGS += $(AVRDUDE_NO_VERIFY)
AVRDUDE_FLAGS += $(AVRDUDE_VERBOSE)
AVRDUDE_FLAGS += $(AVRDUDE_ERASE_COUNTER)
#PROGRAM_CMD = $(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
#PROGRAM_CMD = teensy_loader_cli -mmcu=$(MCU) -w -v $(TARGET).hex
PROGRAM_CMD = dfu-programmer atmega32u4 flash $(TARGET).hex
include $(COMMON_DIR)/pjrc.mk
include $(COMMON_DIR)/common.mk

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x68k_usb/README Normal file
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X68000 to USB keyboard protocol converter
=========================================
SHARP X68000 is a hobby computer released in Japan.(1987-93)
http://en.wikipedia.org/wiki/Sharp_X68000
X68000 keyboard has ALPS linear switches.
- DSETK0016CE01 green linear
- DSETK0023CE03 yellow linear
Hardware
--------
Target MCU is ATMega32u4 but other USB capable AVR will also work.
You can use PJRC Teensy as dev board.
http://www.pjrc.com/teensy/
Wiring:
Mini-DIN Teensy
-----------------------------------------------------
pin1 +5V VCC
pin2 MOUSE -
pin3 RXD PD2(RXD)
pin4 TXD PD3(TXD) NOTE: Not supported yet.
pin5 READY -
pin6 REMOTE -
pin7 GND GND
Firmware
--------
Build:
$ cd x68k_usb
$ make
And load the binary to MCU with your favorite programmer.
If you use Teensy you can load with PJRC Teensy Loader tool.
http://www.pjrc.com/teensy/loader.html
* * * * * * * * * * * * * * * * * *
X68000 Keyboard Protocol
========================
http://kyoutan.jpn.org/uts/pc/pic/x68key/
Connector
---------
Mini DIN 7pin(female connector on computer side)
7 6 5
o o o
4 o = o 3
o o
2 1
Mini-DIN
-------------
pin1 +5V
pin2 MOUSE
pin3 RXD
pin4 TXD
pin5 READY
pin6 REMOTE
pin7 GND
Signaling
---------
- TXD,RXD
Asynchronous, 2400baud, 1-startbit(L), 8-databit, 1-stopbit(H)
- READY
ready/not ready(1/0)
Data from keyboard
------------------
bit 7 make/break flag(0/1)
bit 6-0 following scan code
Data from computer
------------------
- LED contorol ON/OFF(0/1)
bit 7 1(fixed)
bit 6 全角
bit 5 ひらがな
bit 4 INS
bit 3 CAPS
bit 2 コード入力
bit 1 ローマ字
bit 0 かな
- Repeat delay
bit 7 0(fixed)
bit 6 1(fixed)
bit 5 1(fixed)
bit 4 0(fixed)
bit 3-0 delay
REPEAT_DELAY = 200+delay*100 ms
default: 500ms
- Repeat time
bit 7 0(fixed)
bit 6 1(fixed)
bit 5 1(fixed)
bit 4 1(fixed)
bit 3-0 time
REPEAT_TIME = 30+time^2*5 ms
default: 110ms
Scan Codes
----------
,---. ,---. ,-------------------, ,-------------------. ,-----------. ,---------------.
| 61| | 62| | 63| 64| 65| 66| 67| | 68| 69| 6A| 6B| 6C| | 5A| 5B| 5C| | 5D| 52| 53| 54|
`---' `---' `-------------------' `-------------------' `-----------' `---------------'
,-----------------------------------------------------------. ,-----------. ,---------------.
| 01| 02| 03| 04| 05| 06| 07| 08| 09| 0A| 0B| 0C| 0D| 0E| 0F| | 36| 5E| 37| | 3F| 40| 41| 42|
|-----------------------------------------------------------| |------------ |---------------|
| 10 | 11| 12| 13| 14| 15| 16| 17| 18| 19| 1A| 1B| 1C| | | 38| 39| 3A| | 43| 44| 45| 46|
|------------------------------------------------------. 1D | `---=====---' |---------------|
| 71 | 1E| 1F| 20| 21| 2l| 23| 24| 25| 26| 27| 28| 29| | ___| 3C|___ | 47| 48| 49| 4A|
|-----------------------------------------------------------| | 3B|---| 3D| |-----------|---|
| 70 | 2A| 2B| 2C| 2D| 2E| 2F| 30| 31| 32| 33| 34| 70 | `---| 3E|---' | 4B| 4C| 4D| |
`-----------------------------------------------------------| .---=====---. |-----------| 4E|
| 5F| 55 | 56 | 35 | 57 | 58 | 59 | 60| | 72 | 73 | | 4F| 50| 51| |
`---------------------------------------------' `-----------' `---------------'

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x68k_usb/config_pjrc.h Normal file
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/*
Copyright 2012 Jun Wako <wakojun@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef CONFIG_H
#define CONFIG_H
/* controller configuration */
#include "controller_teensy.h"
#define VENDOR_ID 0xFEED
#define PRODUCT_ID 0x6800
#define MANUFACTURER t.m.k.
#define PRODUCT SHARP X68000 keyboard converter
#define DESCRIPTION converts SHARP X68000 keyboard protocol into USB
/* matrix size */
#define MATRIX_ROWS 16
#define MATRIX_COLS 8
/* key combination for command */
#define IS_COMMAND() ( \
keyboard_report->mods == (MOD_BIT(KB_LALT) | MOD_BIT(KB_RALT)) || \
keyboard_report->mods == (MOD_BIT(KB_LCTRL) | MOD_BIT(KB_RSHIFT)) \
)
/* mouse keys */
#ifdef MOUSEKEY_ENABLE
# define MOUSEKEY_DELAY_TIME 255
#endif
/* USART configuration
* asynchronous, 2400baud, 8-data bit, non parity, 1-stop bit, no flow control
*/
#ifdef __AVR_ATmega32U4__
# define KBD_RX_VECT USART1_RX_vect
# define KBD_RX_DATA UDR1
# define KBD_RX_BAUD 2400
# define KBD_RX_UBBR ((F_CPU/(16UL*KBD_RX_BAUD))-1)
# define KBD_RX_INIT() do { \
UBRR1L = (uint8_t) KBD_RX_UBBR; \
UBRR1H = (uint8_t) (KBD_RX_UBBR>>8); \
UCSR1B |= (1<<RXCIE1) | (1<<RXEN1); \
} while(0)
#else
# error "USART configuration is needed."
#endif
#endif

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/*
Copyright 2012 Jun Wako <wakojun@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <stdbool.h>
#include <avr/pgmspace.h>
#include "usb_keycodes.h"
#include "util.h"
#include "keymap.h"
// Following macros help you to define a keymap with the form of actual keyboard layout.
/* X68000 Keyboard Scan codes
,---. ,---. ,-------------------, ,-------------------. ,-----------. ,---------------.
| 61| | 62| | 63| 64| 65| 66| 67| | 68| 69| 6A| 6B| 6C| | 5A| 5B| 5C| | 5D| 52| 53| 54|
`---' `---' `-------------------' `-------------------' `-----------' `---------------'
,-----------------------------------------------------------. ,-----------. ,---------------.
| 01| 02| 03| 04| 05| 06| 07| 08| 09| 0A| 0B| 0C| 0D| 0E| 0F| | 36| 5E| 37| | 3F| 40| 41| 42|
|-----------------------------------------------------------| |------------ |---------------|
| 10 | 11| 12| 13| 14| 15| 16| 17| 18| 19| 1A| 1B| 1C| | | 38| 39| 3A| | 43| 44| 45| 46|
|------------------------------------------------------. 1D | `---=====---' |---------------|
| 71 | 1E| 1F| 20| 21| 2l| 23| 24| 25| 26| 27| 28| 29| | ___| 3C|___ | 47| 48| 49| 4A|
|-----------------------------------------------------------| | 3B|---| 3D| |-----------|---|
| 70 | 2A| 2B| 2C| 2D| 2E| 2F| 30| 31| 32| 33| 34| 70 | `---| 3E|---' | 4B| 4C| 4D| |
`-----------------------------------------------------------| .---=====---. |-----------| 4E|
| 5F| 55 | 56 | 35 | 57 | 58 | 59 | 60| | 72 | 73 | | 4F| 50| 51| |
`---------------------------------------------' `-----------' `---------------'
*/
#define KEYMAP( \
K61,K62, K63,K64,K65,K66,K67, K68,K69,K6A,K6B,K6C, K5A,K5B,K5C, K5D,K52,K53,K54, \
K01,K02,K03,K04,K05,K06,K07,K08,K09,K0A,K0B,K0C,K0D,K0E,K0F, K36,K5E,K37, K3F,K40,K41,K42, \
K10,K11,K12,K13,K14,K15,K16,K17,K18,K19,K1A,K1B,K1C, K1D, K38,K39,K3A, K43,K44,K45,K46, \
K71,K1E,K1F,K20,K21,K22,K23,K24,K25,K26,K27,K28,K29, K3C, K47,K48,K49,K4A, \
K70,K2A,K2B,K2C,K2D,K2E,K2F,K30,K31,K32,K33,K34, K3B,K3E,K3D, K4B,K4C,K4D,K4E, \
K5F,K55,K56, K35, K57,K58,K59,K60, K72, K73, K4F,K50,K51 \
) { \
{ KB_NO, KB_##K01, KB_##K02, KB_##K03, KB_##K04, KB_##K05, KB_##K06, KB_##K07 }, \
{ KB_##K08, KB_##K09, KB_##K0A, KB_##K0B, KB_##K0C, KB_##K0D, KB_##K0E, KB_##K0F }, \
{ KB_##K10, KB_##K11, KB_##K12, KB_##K13, KB_##K14, KB_##K15, KB_##K16, KB_##K17 }, \
{ KB_##K18, KB_##K19, KB_##K1A, KB_##K1B, KB_##K1C, KB_##K1D, KB_##K1E, KB_##K1F }, \
{ KB_##K20, KB_##K21, KB_##K22, KB_##K23, KB_##K24, KB_##K25, KB_##K26, KB_##K27 }, \
{ KB_##K28, KB_##K29, KB_##K2A, KB_##K2B, KB_##K2C, KB_##K2D, KB_##K2E, KB_##K2F }, \
{ KB_##K30, KB_##K31, KB_##K32, KB_##K33, KB_##K34, KB_##K35, KB_##K36, KB_##K37 }, \
{ KB_##K38, KB_##K39, KB_##K3A, KB_##K3B, KB_##K3C, KB_##K3D, KB_##K3E, KB_##K3F }, \
{ KB_##K40, KB_##K41, KB_##K42, KB_##K43, KB_##K44, KB_##K45, KB_##K46, KB_##K47 }, \
{ KB_##K48, KB_##K49, KB_##K4A, KB_##K4B, KB_##K4C, KB_##K4D, KB_##K4E, KB_##K4F }, \
{ KB_##K50, KB_##K51, KB_##K52, KB_##K53, KB_##K54, KB_##K55, KB_##K56, KB_##K57 }, \
{ KB_##K58, KB_##K59, KB_##K5A, KB_##K5B, KB_##K5C, KB_##K5D, KB_##K5E, KB_##K5F }, \
{ KB_##K60, KB_##K61, KB_##K62, KB_##K63, KB_##K64, KB_##K65, KB_##K66, KB_##K67 }, \
{ KB_##K68, KB_##K69, KB_##K6A, KB_##K6B, KB_##K6C, KB_NO, KB_NO, KB_NO }, \
{ KB_##K70, KB_##K71, KB_##K72, KB_##K73, KB_NO, KB_NO, KB_NO, KB_NO, }, \
{ KB_NO, KB_NO, KB_NO, KB_NO, KB_NO, KB_NO, KB_NO, KB_NO } \
}
// Assign Fn key(0-7) to a layer to which switch with the Fn key pressed.
static const uint8_t PROGMEM fn_layer[] = {
0, // Fn0
0, // Fn1
0, // Fn2
0, // Fn3
0, // Fn4
0, // Fn5
0, // Fn6
0 // Fn7
};
// Assign Fn key(0-7) to a keycode sent when release Fn key without use of the layer.
// See layer.c for details.
static const uint8_t PROGMEM fn_keycode[] = {
KB_NO, // Fn0
KB_NO, // Fn1
KB_NO, // Fn2
KB_NO, // Fn3
KB_NO, // Fn4
KB_NO, // Fn5
KB_NO, // Fn6
KB_NO // Fn7
};
static const uint8_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
/* X68000 Keyboard Scan codes
,---. ,---. ,-------------------, ,-------------------. ,-----------. ,---------------.
| 61| | 62| | 63| 64| 65| 66| 67| | 68| 69| 6A| 6B| 6C| | 5A| 5B| 5C| | 5D| 52| 53| 54|
`---' `---' `-------------------' `-------------------' `-----------' `---------------'
,-----------------------------------------------------------. ,-----------. ,---------------.
| 01| 02| 03| 04| 05| 06| 07| 08| 09| 0A| 0B| 0C| 0D| 0E| 0F| | 36| 5E| 37| | 3F| 40| 41| 42|
|-----------------------------------------------------------| |------------ |---------------|
| 10 | 11| 12| 13| 14| 15| 16| 17| 18| 19| 1A| 1B| 1C| | | 38| 39| 3A| | 43| 44| 45| 46|
|------------------------------------------------------. 1D | `---=====---' |---------------|
| 71 | 1E| 1F| 20| 21| 2l| 23| 24| 25| 26| 27| 28| 29| | ___| 3C|___ | 47| 48| 49| 4A|
|-----------------------------------------------------------| | 3B|---| 3D| |-----------|---|
| 70 | 2A| 2B| 2C| 2D| 2E| 2F| 30| 31| 32| 33| 34| 70 | `---| 3E|---' | 4B| 4C| 4D| |
`-----------------------------------------------------------| .---=====---. |-----------| 4E|
| 5F| 55 | 56 | 35 | 57 | 58 | 59 | 60| | 72 | 73 | | 4F| 50| 51| |
`---------------------------------------------' `-----------' `---------------'
*/
KEYMAP(
NO, NO, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, PSCR,SLCK,PAUS, CAPS,NO, NO, NO,
ESC, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, MINS,EQL, BSLS,BSPC, INS, HOME,PGUP, NLCK,PSLS,PAST,PMNS,
TAB, Q, W, E, R, T, Y, U, I, O, P, LBRC,RBRC, ENT, DEL, END, PGDN, P7, P8, P9, PPLS,
LCTL,A, S, D, F, G, H, J, K, L, SCLN,QUOT,ENT, UP, P4, P5, P6, PEQL,
LSFT,Z, X, C, V, B, N, M, COMM,DOT, SLSH,GRV, LEFT,DOWN,RGHT, P1, P2, P3, PENT,
LGUI,LALT,NO, SPC, RALT,RGUI,RCTL,APP, NO, NO, P0, PCMM,PDOT
),
};
uint8_t keymap_get_keycode(uint8_t layer, uint8_t row, uint8_t col)
{
return pgm_read_byte(&keymaps[(layer)][(row)][(col)]);
}
uint8_t keymap_fn_layer(uint8_t fn_bits)
{
return pgm_read_byte(&fn_layer[biton(fn_bits)]);
}
uint8_t keymap_fn_keycode(uint8_t fn_bits)
{
return pgm_read_byte(&fn_keycode[(biton(fn_bits))]);
}

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/*
Copyright 2012 Jun Wako <wakojun@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "stdint.h"
#include "x68k.h"
#include "led.h"
void led_set(uint8_t usb_led)
{
// not supported now
}

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/*
Copyright 2012 Jun Wako <wakojun@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <stdbool.h>
#include <avr/io.h>
#include <util/delay.h>
#include "print.h"
#include "util.h"
#include "x68k.h"
#include "matrix.h"
/*
* Matrix Array usage:
*
* ROW: 16(4bits)
* COL: 8(3bits)
*
* 8bit wide
* +---------+
* 0|00 ... 07|
* 1|08 ... 0F|
* :| ... |
* :| ... |
* E|70 ... 77|
* F|78 ... 7F|
* +---------+
*
*/
static uint8_t matrix[MATRIX_ROWS];
#define ROW(code) ((code>>3)&0xF)
#define COL(code) (code&0x07)
static bool is_modified = false;
inline
uint8_t matrix_rows(void)
{
return MATRIX_ROWS;
}
inline
uint8_t matrix_cols(void)
{
return MATRIX_COLS;
}
void matrix_init(void)
{
x68k_init();
// initialize matrix state: all keys off
for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
return;
}
uint8_t matrix_scan(void)
{
is_modified = false;
uint8_t code;
code = x68k_recv();
if (code == 0) {
return 0;
}
phex(code); print(" ");
if (code&0x80) {
// break code
if (matrix_is_on(ROW(code), COL(code))) {
matrix[ROW(code)] &= ~(1<<COL(code));
is_modified = true;
}
} else {
// make code
if (!matrix_is_on(ROW(code), COL(code))) {
matrix[ROW(code)] |= (1<<COL(code));
is_modified = true;
}
}
return code;
}
bool matrix_is_modified(void)
{
return is_modified;
}
inline
bool matrix_has_ghost(void)
{
return false;
}
inline
bool matrix_is_on(uint8_t row, uint8_t col)
{
return (matrix[row] & (1<<col));
}
inline
uint8_t matrix_get_row(uint8_t row)
{
return matrix[row];
}
void matrix_print(void)
{
print("\nr/c 01234567\n");
for (uint8_t row = 0; row < matrix_rows(); row++) {
phex(row); print(": ");
pbin_reverse(matrix_get_row(row));
print("\n");
}
}
uint8_t matrix_key_count(void)
{
uint8_t count = 0;
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
count += bitpop(matrix[i]);
}
return count;
}

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/*
Copyright 2012 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 "x68k.h"
void x68k_init(void)
{
KBD_RX_INIT();
}
// RX ring buffer
#define RBUF_SIZE 8
static uint8_t rbuf[RBUF_SIZE];
static uint8_t rbuf_head = 0;
static uint8_t rbuf_tail = 0;
uint8_t x68k_recv(void)
{
uint8_t data = 0;
if (rbuf_head == rbuf_tail) {
return 0;
}
data = rbuf[rbuf_tail];
rbuf_tail = (rbuf_tail + 1) % RBUF_SIZE;
return data;
}
// USART RX complete interrupt
ISR(KBD_RX_VECT)
{
uint8_t next = (rbuf_head + 1) % RBUF_SIZE;
if (next != rbuf_tail) {
rbuf[rbuf_head] = KBD_RX_DATA;
rbuf_head = next;
}
}

47
x68k_usb/x68k.h Normal file
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/*
Copyright 2012 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.
*/
#ifndef X68K_H
#define X68K_H
/* host role */
void x68k_init(void);
uint8_t x68k_recv(void);
/* device role */
#endif