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/*
* scan matrix
*/
#include <stdint.h>
#include <stdbool.h>
#include <avr/io.h>
#include <util/delay.h>
#include "print.h"
#include "util.h"
#include "debug.h"
#include "ps2.h"
#include "usb_keyboard.h"
#include "matrix_skel.h"
#if (MATRIX_COLS > 16)
# error "MATRIX_COLS must not exceed 16"
#endif
#if (MATRIX_ROWS > 255)
# error "MATRIX_ROWS must not exceed 255"
#endif
/*
* Matrix usage:
* "PS/2 Scan Codes Set 2" is assigned to 256(32x8)cells matrix.
* Hmm, It is very sparse and not efficient :(
*
* 8bit
* ---------
* 0| |
* :| XX | 00-7F for normal codes
* f|_________|
* 10| |
* :| E0 XX | 80-FF for E0-prefix codes(use (XX|0x80) as code)
* 1f| |
* ---------
* exceptions:
* 0x83: F8(normal code placed beyond 0x7F)
* 0xFE: PrintScreen
* 0xFF: Puause/Break
*/
#define _PRINT_SCREEN (0xFE)
#define _PAUSE_BREAK (0xFF)
#define _ROW(code) (code>>3)
#define _COL(code) (code&0x07)
static bool _matrix_is_modified = false;
// matrix state buffer(1:on, 0:off)
#if (MATRIX_COLS <= 8)
static uint8_t *matrix;
static uint8_t _matrix0[MATRIX_ROWS];
#else
static uint16_t *matrix;
static uint16_t _matrix0[MATRIX_ROWS];
#endif
#ifdef MATRIX_HAS_GHOST
static bool matrix_has_ghost_in_row(uint8_t row);
#endif
static void _matrix_make(uint8_t code);
static void _matrix_break(uint8_t code);
static void _ps2_reset(void);
static void _ps2_set_leds(uint8_t leds);
inline
uint8_t matrix_rows(void)
{
return MATRIX_ROWS;
}
inline
uint8_t matrix_cols(void)
{
return MATRIX_COLS;
}
void matrix_init(void)
{
print_enable = true;
ps2_host_init();
_ps2_reset();
// flush LEDs
_ps2_set_leds(1<<PS2_LED_NUM_LOCK);
_delay_ms(100);
_ps2_set_leds(1<<PS2_LED_NUM_LOCK|1<<PS2_LED_CAPS_LOCK);
_delay_ms(100);
_ps2_set_leds(1<<PS2_LED_NUM_LOCK|1<<PS2_LED_CAPS_LOCK|1<<PS2_LED_SCROLL_LOCK);
_delay_ms(300);
_ps2_set_leds(0x00);
// initialize matrix state: all keys off
for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
matrix = _matrix0;
return;
}
uint8_t matrix_scan(void)
{
static enum {
INIT,
BREAK,
E0,
E0_F0,
// states for PrintScreen
E0_12,
E0_12_E0,
E0_F0_7C,
E0_F0_7C_E0,
E0_F0_7C_E0_F0,
// states for Pause/Break
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,
} state = INIT;
_matrix_is_modified = false;
// Pause/Break off(PS/2 has no break for this key)
if (matrix_is_on(_ROW(_PAUSE_BREAK), _COL(_PAUSE_BREAK))) {
_matrix_break(_PAUSE_BREAK);
}
uint8_t code;
while ((code = ps2_host_recv())) {
switch (state) {
case INIT:
switch (code) {
case 0xE0: // 2byte make
state = E0;
break;
case 0xF0: // break code
state = BREAK;
break;
case 0xE1: // Pause/Break
state = E1;
break;
default: // normal key make
if (code < 0x80) {
_matrix_make(code);
} else {
debug("ps/2 unknow code: "); debug_hex(code); debug("\n");
}
state = INIT;
}
break;
case E0:
switch (code) {
case 0x12: // PrintScreen(make)
state = E0_12;
break;
case 0x7C: // PrintScreen(typematic)
// ignore
state = INIT;
break;
case 0xF0: // E0 break
state = E0_F0;
break;
default: // E0 make
if (code < 0x80) {
_matrix_make(code|0x80);
} else {
debug("ps/2 unknow code: "); debug_hex(code); debug("\n");
}
state = INIT;
}
break;
case BREAK:
if (code < 0x80) {
_matrix_break(code);
} else {
debug("ps/2 unknow code: "); debug_hex(code); debug("\n");
}
state = INIT;
break;
case E0_F0: // E0 break
switch (code) {
case 0x7C:
state = E0_F0_7C;
break;
default:
if (code < 0x80) {
_matrix_break(code|0x80);
} else {
debug("ps/2 unknow code: "); debug_hex(code); debug("\n");
}
state = INIT;
}
break;
/* PrintScreen(make) */
case E0_12:
switch (code) {
case 0xE0:
state = E0_12_E0;
break;
default:
state = INIT;
}
break;
case E0_12_E0:
switch (code) {
case 0x7C:
_matrix_make(_PRINT_SCREEN);
state = INIT;
break;
default:
state = INIT;
}
break;
/* PrintScreen(break) */
case E0_F0_7C:
switch (code) {
case 0xE0:
state = E0_F0_7C_E0;
break;
default:
state = INIT;
}
break;
case E0_F0_7C_E0:
switch (code) {
case 0xF0:
state = E0_F0_7C_E0_F0;
break;
default:
state = INIT;
}
break;
case E0_F0_7C_E0_F0:
switch (code) {
case 0x12:
_matrix_break(_PRINT_SCREEN);
state = INIT;
break;
default:
state = INIT;
}
break;
/* Pause/Break */
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_BREAK);
state = INIT;
break;
default:
state = INIT;
}
break;
default:
state = INIT;
}
}
static uint8_t prev_leds = 0;
if (prev_leds != usb_keyboard_leds) {
uint8_t leds = 0;
if (usb_keyboard_leds&(1<<USB_LED_SCROLL_LOCK))
leds |= (1<<PS2_LED_SCROLL_LOCK);
if (usb_keyboard_leds&(1<<USB_LED_NUM_LOCK))
leds |= (1<<PS2_LED_NUM_LOCK);
if (usb_keyboard_leds&(1<<USB_LED_CAPS_LOCK))
leds |= (1<<PS2_LED_CAPS_LOCK);
_ps2_set_leds(leds);
prev_leds = usb_keyboard_leds;
}
return 1;
}
bool matrix_is_modified(void)
{
return _matrix_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
#if (MATRIX_COLS <= 8)
uint8_t matrix_get_row(uint8_t row)
#else
uint16_t matrix_get_row(uint8_t row)
#endif
{
return matrix[row];
}
void matrix_print(void)
{
#if (MATRIX_COLS <= 8)
print("\nr/c 01234567\n");
#else
print("\nr/c 0123456789ABCDEF\n");
#endif
for (uint8_t row = 0; row < matrix_rows(); row++) {
phex(row); print(": ");
#if (MATRIX_COLS <= 8)
pbin_reverse(matrix_get_row(row));
#else
pbin_reverse16(matrix_get_row(row));
#endif
#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++) {
#if (MATRIX_COLS <= 8)
count += bitpop(matrix[i]);
#else
count += bitpop16(matrix[i]);
#endif
}
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);
_matrix_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));
_matrix_is_modified = true;
}
}
static void _ps2_reset(void)
{
ps2_host_send(0xFF);
ps2_host_recv(); // 0xFA
ps2_host_recv(); // 0xAA
_delay_ms(1000);
}
static void _ps2_set_leds(uint8_t leds)
{
ps2_host_send(0xED);
ps2_host_recv(); // 0xFA
ps2_host_send(leds);
ps2_host_recv(); // 0xFA
}
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