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57
trunk/Arduino/libraries/ps2uartKeyboard/Examples/PS2uartKeyboard_tvout/PS2uartKeyboard_tvout.pde Normal file
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/*
based on pollserial and PS2Keyboard.
Combined by Yotson, october 2011
ps2 keyboard library which uses the usart hardware for buffering individual bits into a byte before reading the byte by software.
Goal was to use a ps2 keyboard in combination with tv-out without image/timing corruption.
The interrupt driven version of ps2 keyboard messed with tv out image/timing.
Tested on atmega328. Not compatible with arduino mega/mega2560 as the XCKn pins are not broken out to header/pad.
ps2-Keyboard pin | Arduino pin
-------------------------------------------
data | RX, digital pin 0
clock | XCK, digital pin 4
ground | Ground
5V | 5V
*/
#define DEBUG // comment out to disable
#ifdef DEBUG
#include <NewSoftSerial.h> // this _will_ mess with tvout timings. Used for debugging.
NewSoftSerial mySerial(11, 12);
#endif
#include <TVout.h>
#include <fontALL.h>
#include <PS2uartKeyboard.h>
TVout TV;
PS2uartKeyboard keyboard;
void setup() {
TV.begin(_NTSC);
TV.set_hbi_hook(keyboard.begin());
#ifdef DEBUG
mySerial.begin(14400);
mySerial.println("Hello....? World?");
#else
TV.select_font(font6x8);
TV.println("Keyboard Terminal");
TV.println("-- Version 0.1 --");
#endif
}
void loop() {
if (keyboard.available()) {
#ifdef DEBUG
mySerial.print((char)keyboard.read());
#else
TV.print((char)keyboard.read());
#endif
}
}

363
trunk/Arduino/libraries/ps2uartKeyboard/PS2uartKeyboard.cpp Normal file
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/*
based on pollserial.cpp and PS2Keyboard.cpp
Combined by Yotson, october 2011
ps2 keyboard library which uses the usart hardware for buffering individual bits into a byte before reading the byte by software.
Goal was to use a ps2 keyboard in combination with tv-out without image/timing corruption.
The interrupt driven version of ps2 keyboard messed with tv out image/timing.
Tested on atmega328. Not compatible with arduino mega/mega2560 as the XCKn pins are not broken out to header/pad.
ps2-Keyboard pin | Arduino pin
-------------------------------------------
data | RX, digital pin 0
clock | XCK, digital pin 4
ground | Ground
5V | 5V
*/
/*
pollserial.cpp Heavily modified version of:
HardwareSerial.cpp - Hardware serial library for Wiring
Copyright (c) 2006 Nicholas Zambetti. All right reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Modified 23 November 2006 by David A. Mellis
Modified July 2010 by Myles D. Metzler
*/
/*
PS2Keyboard.cpp - PS2Keyboard library
Copyright (c) 2007 Free Software Foundation. All right reserved.
Written by Christian Weichel <info@32leaves.net>
** Mostly rewritten Paul Stoffregen <paul@pjrc.com> 2010, 2011
** Modified for use beginning with Arduino 13 by L. Abraham Smith, <n3bah@microcompdesign.com> *
** Modified for easy interrup pin assignement on method begin(datapin,irq_pin). Cuningan <cuninganreset@gmail.com> **
for more information you can read the original wiki in arduino.cc
at http://www.arduino.cc/playground/Main/PS2Keyboard
or http://www.pjrc.com/teensy/td_libs_PS2Keyboard.html
Version 2.1 (May 2011)
- timeout to recover from misaligned input
- compatibility with Arduino "new-extension" branch
- TODO: send function, proposed by Scott Penrose, scooterda at me dot com
Version 2.0 (June 2010)
- Buffering added, many scan codes can be captured without data loss
if your sketch is busy doing other work
- Shift keys supported, completely rewritten scan code to ascii
- Slow linear search replaced with fast indexed table lookups
- Support for Teensy, Arduino Mega, and Sanguino added
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "PS2uartKeyboard.h"
#include <avr/pgmspace.h>
#define UARTBUFFER_SIZE 45
static uint8_t buffer[UARTBUFFER_SIZE];
static uint8_t head, tail;
static char ps2Keyboard_CharBuffer=0;
void USART_recieve() {
#if defined ( UDR0 )
if( UCSR0A & _BV(RXC0)) {
uint8_t i = head + 1;
if (i >= UARTBUFFER_SIZE) i = 0;
if (i != tail) {
buffer[i] = UDR0;
head = i;
}
}
#else
if( UCSRA & _BV(RXC)) {
uint8_t i = head + 1;
if (i >= UARTBUFFER_SIZE) i = 0;
if (i != tail) {
buffer[i] = UDR;
head = i;
}
}
#endif
}
static inline uint8_t get_scan_code(void)
{
uint8_t c, i;
i = tail;
if (i == head) return 0;
i++;
if (i >= UARTBUFFER_SIZE) i = 0;
c = buffer[i];
tail = i;
return c;
}
// http://www.quadibloc.com/comp/scan.htm
// http://www.computer-engineering.org/ps2keyboard/scancodes2.html
#define BREAK 0x01
#define MODIFIER 0x02
#define SHIFT_L 0x04
#define SHIFT_R 0x08
// These arrays provide a simple key map, to turn scan codes into ASCII
// output. If a non-US keyboard is used, these may need to be modified
// for the desired output.
const PROGMEM unsigned char scan2ascii_noshift[] = {
0, PS2_F9, 0, PS2_F5, PS2_F3, PS2_F1, PS2_F2, PS2_F12,
0, PS2_F10, PS2_F8, PS2_F6, PS2_F4, PS2_TAB, '`', 0,
0, 0 /*Lalt*/, 0 /*Lshift*/, 0, 0 /*Lctrl*/, 'q', '1', 0,
0, 0, 'z', 's', 'a', 'w', '2', 0,
0, 'c', 'x', 'd', 'e', '4', '3', 0,
0, ' ', 'v', 'f', 't', 'r', '5', 0,
0, 'n', 'b', 'h', 'g', 'y', '6', 0,
0, 0, 'm', 'j', 'u', '7', '8', 0,
0, ',', 'k', 'i', 'o', '0', '9', 0,
0, '.', '/', 'l', ';', 'p', '-', 0,
0, 0, '\'', 0, '[', '=', 0, 0,
0 /*CapsLock*/, 0 /*Rshift*/, PS2_ENTER /*Enter*/, ']', 0, '\\', 0, 0,
0, 0, 0, 0, 0, 0, PS2_BACKSPACE, 0,
0, '1', 0, '4', '7', 0, 0, 0,
'0', '.', '2', '5', '6', '8', PS2_ESC, 0 /*NumLock*/,
PS2_F11, '+', '3', '-', '*', '9', PS2_SCROLL, 0,
0, 0, 0, PS2_F7 };
const PROGMEM unsigned char scan2ascii_shift[] = {
0, PS2_F9, 0, PS2_F5, PS2_F3, PS2_F1, PS2_F2, PS2_F12,
0, PS2_F10, PS2_F8, PS2_F6, PS2_F4, PS2_TAB, '~', 0,
0, 0 /*Lalt*/, 0 /*Lshift*/, 0, 0 /*Lctrl*/, 'Q', '!', 0,
0, 0, 'Z', 'S', 'A', 'W', '@', 0,
0, 'C', 'X', 'D', 'E', '$', '#', 0,
0, ' ', 'V', 'F', 'T', 'R', '%', 0,
0, 'N', 'B', 'H', 'G', 'Y', '^', 0,
0, 0, 'M', 'J', 'U', '&', '*', 0,
0, '<', 'K', 'I', 'O', ')', '(', 0,
0, '>', '?', 'L', ':', 'P', '_', 0,
0, 0, '"', 0, '{', '+', 0, 0,
0 /*CapsLock*/, 0 /*Rshift*/, PS2_ENTER /*Enter*/, '}', 0, '|', 0, 0,
0, 0, 0, 0, 0, 0, PS2_BACKSPACE, 0,
0, '1', 0, '4', '7', 0, 0, 0,
'0', '.', '2', '5', '6', '8', PS2_ESC, 0 /*NumLock*/,
PS2_F11, '+', '3', '-', '*', '9', PS2_SCROLL, 0,
0, 0, 0, PS2_F7 };
static char get_ascii_code(void)
{
static uint8_t state=0;
uint8_t s;
char c;
while (1) {
s = get_scan_code();
if (!s) return 0;
if (s == 0xF0) {
state |= BREAK;
}
else if (s == 0xE0) {
state |= MODIFIER;
}
else {
if (state & BREAK) {
if (s == 0x12) {
state &= ~SHIFT_L;
}
else if (s == 0x59) {
state &= ~SHIFT_R;
}
// CTRL, ALT & WIN keys could be added
// but is that really worth the overhead?
state &= ~(BREAK | MODIFIER);
continue;
}
if (s == 0x12) {
state |= SHIFT_L;
continue;
}
else if (s == 0x59) {
state |= SHIFT_R;
continue;
}
c = 0;
if (state & MODIFIER) {
switch (s) {
case 0x70:
c = PS2_INSERT;
break;
case 0x6C:
c = PS2_HOME;
break;
case 0x7D:
c = PS2_PAGEUP;
break;
case 0x71:
c = PS2_DELETE;
break;
case 0x69:
c = PS2_END;
break;
case 0x7A:
c = PS2_PAGEDOWN;
break;
case 0x75:
c = PS2_UPARROW;
break;
case 0x6B:
c = PS2_LEFTARROW;
break;
case 0x72:
c = PS2_DOWNARROW;
break;
case 0x74:
c = PS2_RIGHTARROW;
break;
case 0x4A:
c = '/';
break;
case 0x5A:
c = PS2_ENTER;
break;
default:
break;
}
}
else if (state & (SHIFT_L | SHIFT_R)) {
if (s < sizeof(scan2ascii_shift))
c = pgm_read_byte(scan2ascii_shift + s);
}
else {
if (s < sizeof(scan2ascii_noshift))
c = pgm_read_byte(scan2ascii_noshift + s);
}
state &= ~(BREAK | MODIFIER);
if (c) return c;
}
}
}
bool PS2uartKeyboard::available(){
if (ps2Keyboard_CharBuffer) return true;
ps2Keyboard_CharBuffer = get_ascii_code();
if (ps2Keyboard_CharBuffer) return true;
return false;
}
int PS2uartKeyboard::read(){
char result = ps2Keyboard_CharBuffer;
if (result) {
ps2Keyboard_CharBuffer = 0;
}
else {
result = get_ascii_code();
}
if (!result) return -1;
return result;
}
void PS2uartKeyboard::flush(){
head = tail;
}
pt2Funct PS2uartKeyboard::begin(void) {
uint16_t baud_setting;
bool use_u2x;
long baud = 19200L;
// U2X mode is needed for baud rates higher than (CPU Hz / 16)
if (baud > F_CPU / 16) {
use_u2x = true;
}
else {
// figure out if U2X mode would allow for a better connection
// calculate the percent difference between the baud-rate specified and
// the real baud rate for both U2X and non-U2X mode (0-255 error percent)
uint8_t nonu2x_baud_error = abs((int)(255-((F_CPU/(16*(((F_CPU/8/baud-1)/2)+1))*255)/baud)));
uint8_t u2x_baud_error = abs((int)(255-((F_CPU/(8*(((F_CPU/4/baud-1)/2)+1))*255)/baud)));
// prefer non-U2X mode because it handles clock skew better
use_u2x = (nonu2x_baud_error > u2x_baud_error);
}
if (use_u2x) {
#if defined ( UDR0 )
UCSR0A = _BV(U2X0);
#else
UCSRA = _BV(U2X);
#endif
baud_setting = (F_CPU / 4 / baud - 1) / 2;
}
else {
#if defined ( UDR0 )
UCSR0A = 0;
#else
UCSRA = 0;
#endif
baud_setting = (F_CPU / 8 / baud - 1) / 2;
}
// ps2 requirements
// modify settings of serial1
// 1 start bit, 8 data bits, 1 parity bit (odd parity), 1 stop bit.
// UCSRnC
// UMSELn1 UMSELn0
// 0 0 Asynchronous USART
// 0 1 Synchronous USART <- atmega 328/168, XCK, pin6, Digital pin4 arduino with atmega328
// 1 0 (Reserved)
// 1 1 Master SPI (MSPIM)
// UCSRnC
// UPMn1 UPMn0
// 0 0 Disabled
// 0 1 Reserved
// 1 0 Enabled, Even Parity
// 1 1 Enabled, Odd Parity <-
// assign the baud_setting, a.k.a. (USART Baud Rate Register)
#if defined ( UDR0 )
UBRR0 = baud_setting;
UCSR0B = _BV(RXEN0) | _BV(TXEN0);
bitSet(UCSR0C, UMSEL00);
bitSet(UCSR0C, UPM01);
bitSet(UCSR0C, UPM00);
#else
UBRR = baud_setting;
UCSRB = _BV(RXEN) | _BV(TXEN);
bitSet(UCSRC, UMSEL0);
bitSet(UCSRC, UPM1);
bitSet(UCSRC, UPM0);
#endif
head = 0;
tail = 0;
return &USART_recieve;
}

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trunk/Arduino/libraries/ps2uartKeyboard/PS2uartKeyboard.h Normal file
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/*
based on pollserial.h and PS2Keyboard.h
Combined by Yotson, october 2011.
ps2 keyboard library which uses the usart hardware for buffering individual bits into a byte before reading the byte by software.
Goal was to use a ps2 keyboard in combination with tv-out without image/timing corruption.
The interrupt driven version of ps2 keyboard messed with tv out image/timing.
Tested on atmega328. Not compatible with arduino mega/mega2560 as the XCKn pins are not broken out to header/pad.
ps2-Keyboard pin | Arduino pin
-------------------------------------------
data | RX, digital pin 0
clock | XCK, digital pin 4
ground | Ground
5V | 5V
*/
/*
pollserial.h Heavily modified version of:
HardwareSerial.h - Hardware serial library for Wiring
Copyright (c) 2006 Nicholas Zambetti. All right reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Modified July 2010 by Myles D. Metzler
*/
/*
PS2Keyboard.h - PS2Keyboard library
Copyright (c) 2007 Free Software Foundation. All right reserved.
Written by Christian Weichel <info@32leaves.net>
** Mostly rewritten Paul Stoffregen <paul@pjrc.com>, June 2010
** Modified for use with Arduino 13 by L. Abraham Smith, <n3bah@microcompdesign.com> *
** Modified for easy interrup pin assignement on method begin(datapin,irq_pin). Cuningan <cuninganreset@gmail.com> **
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef PS2UART_h
#define PS2UART_h
#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
// Every call to read() returns a single byte for each
// keystroke. These configure what byte will be returned
// for each "special" key. To ignore a key, use zero.
#define PS2_TAB 9
#define PS2_ENTER 13
#define PS2_BACKSPACE 127
#define PS2_ESC 27
#define PS2_INSERT 0
#define PS2_DELETE 127
#define PS2_HOME 0
#define PS2_END 0
#define PS2_PAGEUP 25
#define PS2_PAGEDOWN 26
#define PS2_UPARROW 11
#define PS2_LEFTARROW 8
#define PS2_DOWNARROW 10
#define PS2_RIGHTARROW 21
#define PS2_F1 0
#define PS2_F2 0
#define PS2_F3 0
#define PS2_F4 0
#define PS2_F5 0
#define PS2_F6 0
#define PS2_F7 0
#define PS2_F8 0
#define PS2_F9 0
#define PS2_F10 0
#define PS2_F11 0
#define PS2_F12 0
#define PS2_SCROLL 0
/* Previous versions of this library returned a mix of ascii characters
* and raw scan codes (if no ASCII character could be found). There was
* no way to determine if a byte was ascii or a raw scan code. With
* version 2.0, only ASCII is returned, plus the special bytes above.
* These raw scan codes are never returned by read() anymore.
*
* PS2 keyboard "make" codes to check for certain keys.
*/
#define PS2_KC_BREAK 0xf0
#define PS2_KC_ENTER 0x0d
#define PS2_KC_ESC 0x76
#define PS2_KC_KPLUS 0x79
#define PS2_KC_KMINUS 0x7b
#define PS2_KC_KMULTI 0x7c
#define PS2_KC_NUM 0x77
#define PS2_KC_BKSP 0x66
//define a void function() return type.
typedef void (*pt2Funct)();
/**
* Purpose: Provides an easy access to PS2 keyboards
* Author: Christian Weichel
*
* Altered by Yotson for usage with usart hardware, october 2011.
*/
class PS2uartKeyboard {
public:
/**
* Starts the keyboard "service".
* setting the usart mode correctly.
* Propably the best place to call this method is in the setup routine.
*/
pt2Funct begin();
/**
* Returns true if there is a char to be read, false if not.
*/
bool available();
/**
* Returns the char last read from the keyboard.
* If there is no char availble, -1 is returned.
*/
int read();
/**
* Clears buffer.
* Use this if you want to ignore all keys pressed uptil this moment.
*/
void flush(void);
private:
};
void USART_recieve();
#endif

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trunk/Arduino/libraries/ps2uartKeyboard/keywords.txt Normal file
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#######################################
# Syntax Coloring Map For ps2uartKeyboard
#######################################
#######################################
# Datatypes (KEYWORD1)
#######################################
PS2uartKeyboard KEYWORD1
#######################################
# Methods and Functions (KEYWORD2)
#######################################
#######################################
# Constants (LITERAL1)
#######################################
PS2_KC_BREAK LITERAL1
PS2_KC_ENTER LITERAL1
PS2_KC_ESC LITERAL1
PS2_KC_KPLUS LITERAL1
PS2_KC_KMINUS LITERAL1
PS2_KC_KMULTI LITERAL1
PS2_KC_NUM LITERAL1
PS2_KC_BKSP LITERAL1