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qmk_firmware/converter/ps2_usb/matrix.c
tmk 4c8e0fd0bd Port ps2_usb to mbed
2014-07-30 14:07:43 +09:00

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/*
Copyright 2011 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 "action.h"
#include "print.h"
#include "util.h"
#include "debug.h"
#include "ps2.h"
#include "matrix.h"
static void matrix_make(uint8_t code);
static void matrix_break(uint8_t code);
static void matrix_clear(void);
#ifdef MATRIX_HAS_GHOST
static bool matrix_has_ghost_in_row(uint8_t row);
#endif
/*
* Matrix Array usage:
* 'Scan Code Set 2' is assigned into 256(32x8)cell matrix.
* Hmm, it is very sparse and not efficient :(
*
* Notes:
* Both 'Hanguel/English'(F1) and 'Hanja'(F2) collide with 'Delete'(E0 71) and 'Down'(E0 72).
* These two Korean keys need exceptional handling and are not supported for now. Sorry.
*
* 8bit wide
* +---------+
* 0| |
* :| XX | 00-7F for normal codes(without E0-prefix)
* f|_________|
* 10| |
* :| E0 YY | 80-FF for E0-prefixed codes
* 1f| | (<YY>|0x80) is used as matrix position.
* +---------+
*
* Exceptions:
* 0x83: F7(0x83) This is a normal code but beyond 0x7F.
* 0xFC: PrintScreen
* 0xFE: Pause
*/
static uint8_t matrix[MATRIX_ROWS];
#define ROW(code) (code>>3)
#define COL(code) (code&0x07)
// matrix positions for exceptional keys
#define F7 (0x83)
#define PRINT_SCREEN (0xFC)
#define PAUSE (0xFE)
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)
{
debug_enable = true;
ps2_host_init();
// initialize matrix state: all keys off
for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
return;
}
/*
* PS/2 Scan Code Set 2: Exceptional Handling
*
* There are several keys to be handled exceptionally.
* The scan code for these keys are varied or prefix/postfix'd
* depending on modifier key state.
*
* Keyboard Scan Code Specification:
* http://www.microsoft.com/whdc/archive/scancode.mspx
* http://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/scancode.doc
*
*
* 1) Insert, Delete, Home, End, PageUp, PageDown, Up, Down, Right, Left
* a) when Num Lock is off
* modifiers | make | break
* ----------+---------------------------+----------------------
* Ohter | <make> | <break>
* LShift | E0 F0 12 <make> | <break> E0 12
* RShift | E0 F0 59 <make> | <break> E0 59
* L+RShift | E0 F0 12 E0 F0 59 <make> | <break> E0 59 E0 12
*
* b) when Num Lock is on
* modifiers | make | break
* ----------+---------------------------+----------------------
* Other | E0 12 <make> | <break> E0 F0 12
* Shift'd | <make> | <break>
*
* Handling: These prefix/postfix codes are ignored.
*
*
* 2) Keypad /
* modifiers | make | break
* ----------+---------------------------+----------------------
* Ohter | <make> | <break>
* LShift | E0 F0 12 <make> | <break> E0 12
* RShift | E0 F0 59 <make> | <break> E0 59
* L+RShift | E0 F0 12 E0 F0 59 <make> | <break> E0 59 E0 12
*
* Handling: These prefix/postfix codes are ignored.
*
*
* 3) PrintScreen
* modifiers | make | break
* ----------+--------------+-----------------------------------
* Other | E0 12 E0 7C | E0 F0 7C E0 F0 12
* Shift'd | E0 7C | E0 F0 7C
* Control'd | E0 7C | E0 F0 7C
* Alt'd | 84 | F0 84
*
* Handling: These prefix/postfix codes are ignored, and both scan codes
* 'E0 7C' and 84 are seen as PrintScreen.
*
* 4) Pause
* modifiers | make(no break code)
* ----------+--------------------------------------------------
* Other | E1 14 77 E1 F0 14 F0 77
* Control'd | E0 7E E0 F0 7E
*
* Handling: Both code sequences are treated as a whole.
* And we need a ad hoc 'pseudo break code' hack to get the key off
* because it has no break code.
*
*/
uint8_t matrix_scan(void)
{
// scan code reading states
static enum {
INIT,
F0,
E0,
E0_F0,
// Pause
E1,
E1_14,
E1_14_77,
E1_14_77_E1,
E1_14_77_E1_F0,
E1_14_77_E1_F0_14,
E1_14_77_E1_F0_14_F0,
// Control'd Pause
E0_7E,
E0_7E_E0,
E0_7E_E0_F0,
} state = INIT;
is_modified = false;
// 'pseudo break code' hack
if (matrix_is_on(ROW(PAUSE), COL(PAUSE))) {
matrix_break(PAUSE);
}
uint8_t code = ps2_host_recv();
if (code) xprintf("%i\r\n", code);
if (!ps2_error) {
switch (state) {
case INIT:
switch (code) {
case 0xE0:
state = E0;
break;
case 0xF0:
state = F0;
break;
case 0xE1:
state = E1;
break;
case 0x83: // F7
matrix_make(F7);
state = INIT;
break;
case 0x84: // Alt'd PrintScreen
matrix_make(PRINT_SCREEN);
state = INIT;
break;
case 0x00: // Overrun [3]p.25
matrix_clear();
clear_keyboard();
print("Overrun\n");
state = INIT;
break;
default: // normal key make
if (code < 0x80) {
matrix_make(code);
} else {
matrix_clear();
clear_keyboard();
xprintf("unexpected scan code at INIT: %02X\n", code);
}
state = INIT;
}
break;
case E0: // E0-Prefixed
switch (code) {
case 0x12: // to be ignored
case 0x59: // to be ignored
state = INIT;
break;
case 0x7E: // Control'd Pause
state = E0_7E;
break;
case 0xF0:
state = E0_F0;
break;
default:
if (code < 0x80) {
matrix_make(code|0x80);
} else {
matrix_clear();
clear_keyboard();
xprintf("unexpected scan code at E0: %02X\n", code);
}
state = INIT;
}
break;
case F0: // Break code
switch (code) {
case 0x83: // F7
matrix_break(F7);
state = INIT;
break;
case 0x84: // Alt'd PrintScreen
matrix_break(PRINT_SCREEN);
state = INIT;
break;
case 0xF0:
matrix_clear();
clear_keyboard();
xprintf("unexpected scan code at F0: F0(clear and cont.)\n");
break;
default:
if (code < 0x80) {
matrix_break(code);
} else {
matrix_clear();
clear_keyboard();
xprintf("unexpected scan code at F0: %02X\n", code);
}
state = INIT;
}
break;
case E0_F0: // Break code of E0-prefixed
switch (code) {
case 0x12: // to be ignored
case 0x59: // to be ignored
state = INIT;
break;
default:
if (code < 0x80) {
matrix_break(code|0x80);
} else {
matrix_clear();
clear_keyboard();
xprintf("unexpected scan code at E0_F0: %02X\n", code);
}
state = INIT;
}
break;
// following are states of Pause
case E1:
switch (code) {
case 0x14:
state = E1_14;
break;
default:
state = INIT;
}
break;
case E1_14:
switch (code) {
case 0x77:
state = E1_14_77;
break;
default:
state = INIT;
}
break;
case E1_14_77:
switch (code) {
case 0xE1:
state = E1_14_77_E1;
break;
default:
state = INIT;
}
break;
case E1_14_77_E1:
switch (code) {
case 0xF0:
state = E1_14_77_E1_F0;
break;
default:
state = INIT;
}
break;
case E1_14_77_E1_F0:
switch (code) {
case 0x14:
state = E1_14_77_E1_F0_14;
break;
default:
state = INIT;
}
break;
case E1_14_77_E1_F0_14:
switch (code) {
case 0xF0:
state = E1_14_77_E1_F0_14_F0;
break;
default:
state = INIT;
}
break;
case E1_14_77_E1_F0_14_F0:
switch (code) {
case 0x77:
matrix_make(PAUSE);
state = INIT;
break;
default:
state = INIT;
}
break;
// Following are states of Control'd Pause
case E0_7E:
if (code == 0xE0)
state = E0_7E_E0;
else
state = INIT;
break;
case E0_7E_E0:
if (code == 0xF0)
state = E0_7E_E0_F0;
else
state = INIT;
break;
case E0_7E_E0_F0:
if (code == 0x7E)
matrix_make(PAUSE);
state = INIT;
break;
default:
state = INIT;
}
}
// TODO: request RESEND when error occurs?
/*
if (PS2_IS_FAILED(ps2_error)) {
uint8_t ret = ps2_host_send(PS2_RESEND);
xprintf("Resend: %02X\n", ret);
}
*/
return 1;
}
bool matrix_is_modified(void)
{
return is_modified;
}
inline
bool matrix_has_ghost(void)
{
#ifdef MATRIX_HAS_GHOST
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
if (matrix_has_ghost_in_row(i))
return true;
}
#endif
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));
#ifdef MATRIX_HAS_GHOST
if (matrix_has_ghost_in_row(row)) {
print(" <ghost");
}
#endif
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;
}
#ifdef MATRIX_HAS_GHOST
inline
static bool matrix_has_ghost_in_row(uint8_t row)
{
// no ghost exists in case less than 2 keys on
if (((matrix[row] - 1) & matrix[row]) == 0)
return false;
// ghost exists in case same state as other row
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
if (i != row && (matrix[i] & matrix[row]) == matrix[row])
return true;
}
return false;
}
#endif
inline
static void matrix_make(uint8_t code)
{
if (!matrix_is_on(ROW(code), COL(code))) {
matrix[ROW(code)] |= 1<<COL(code);
is_modified = true;
}
}
inline
static void matrix_break(uint8_t code)
{
if (matrix_is_on(ROW(code), COL(code))) {
matrix[ROW(code)] &= ~(1<<COL(code));
is_modified = true;
}
}
inline
static void matrix_clear(void)
{
for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
}
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