457 lines
11 KiB
C
457 lines
11 KiB
C
/*
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* scan matrix
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include <util/delay.h>
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#include "print.h"
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#include "util.h"
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#include "debug.h"
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#include "ps2.h"
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#include "usb_keyboard.h"
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#include "matrix_skel.h"
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#if (MATRIX_COLS > 16)
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# error "MATRIX_COLS must not exceed 16"
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#endif
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#if (MATRIX_ROWS > 255)
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# error "MATRIX_ROWS must not exceed 255"
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#endif
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/*
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* Matrix usage:
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* "PS/2 Scan Codes Set 2" is assigned to 256(32x8)cells matrix.
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* Hmm, It is very sparse and not efficient :(
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*
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* 8bit
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* ---------
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* 0| |
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* :| XX | 00-7F for normal codes
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* f|_________|
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* 10| |
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* :| E0 XX | 80-FF for E0-prefix codes(use (XX|0x80) as code)
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* 1f| |
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* ---------
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* exceptions:
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* 0x83: F8(normal code placed beyond 0x7F)
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* 0xFE: PrintScreen
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* 0xFF: Puause/Break
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*/
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#define _PRINT_SCREEN (0xFE)
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#define _PAUSE_BREAK (0xFF)
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#define _ROW(code) (code>>3)
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#define _COL(code) (code&0x07)
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static bool _matrix_is_modified = false;
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// matrix state buffer(1:on, 0:off)
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#if (MATRIX_COLS <= 8)
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static uint8_t *matrix;
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static uint8_t _matrix0[MATRIX_ROWS];
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#else
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static uint16_t *matrix;
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static uint16_t _matrix0[MATRIX_ROWS];
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#endif
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#ifdef MATRIX_HAS_GHOST
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static bool matrix_has_ghost_in_row(uint8_t row);
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#endif
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static void _matrix_make(uint8_t code);
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static void _matrix_break(uint8_t code);
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static void _ps2_reset(void);
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static void _ps2_set_leds(uint8_t leds);
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inline
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uint8_t matrix_rows(void)
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{
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return MATRIX_ROWS;
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}
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inline
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uint8_t matrix_cols(void)
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{
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return MATRIX_COLS;
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}
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void matrix_init(void)
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{
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print_enable = true;
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ps2_host_init();
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_ps2_reset();
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// flush LEDs
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_ps2_set_leds(1<<PS2_LED_NUM_LOCK);
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_delay_ms(100);
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_ps2_set_leds(1<<PS2_LED_NUM_LOCK|1<<PS2_LED_CAPS_LOCK);
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_delay_ms(100);
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_ps2_set_leds(1<<PS2_LED_NUM_LOCK|1<<PS2_LED_CAPS_LOCK|1<<PS2_LED_SCROLL_LOCK);
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_delay_ms(300);
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_ps2_set_leds(0x00);
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// initialize matrix state: all keys off
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for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
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matrix = _matrix0;
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return;
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}
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uint8_t matrix_scan(void)
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{
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static enum {
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INIT,
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BREAK,
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E0,
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E0_F0,
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// states for PrintScreen
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E0_12,
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E0_12_E0,
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E0_F0_7C,
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E0_F0_7C_E0,
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E0_F0_7C_E0_F0,
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// states for Pause/Break
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E1,
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E1_14,
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E1_14_77,
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E1_14_77_E1,
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E1_14_77_E1_F0,
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E1_14_77_E1_F0_14,
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E1_14_77_E1_F0_14_F0,
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} state = INIT;
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_matrix_is_modified = false;
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// Pause/Break off(PS/2 has no break for this key)
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if (matrix_is_on(_ROW(_PAUSE_BREAK), _COL(_PAUSE_BREAK))) {
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_matrix_break(_PAUSE_BREAK);
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}
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uint8_t code;
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while ((code = ps2_host_recv())) {
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switch (state) {
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case INIT:
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switch (code) {
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case 0xE0: // 2byte make
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state = E0;
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break;
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case 0xF0: // break code
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state = BREAK;
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break;
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case 0xE1: // Pause/Break
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state = E1;
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break;
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default: // normal key make
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if (code < 0x80) {
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_matrix_make(code);
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} else {
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debug("ps/2 unknow code: "); debug_hex(code); debug("\n");
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}
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state = INIT;
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}
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break;
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case E0:
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switch (code) {
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case 0x12: // PrintScreen(make)
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state = E0_12;
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break;
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case 0x7C: // PrintScreen(typematic)
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// ignore
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state = INIT;
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break;
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case 0xF0: // E0 break
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state = E0_F0;
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break;
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default: // E0 make
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if (code < 0x80) {
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_matrix_make(code|0x80);
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} else {
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debug("ps/2 unknow code: "); debug_hex(code); debug("\n");
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}
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state = INIT;
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}
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break;
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case BREAK:
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if (code < 0x80) {
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_matrix_break(code);
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} else {
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debug("ps/2 unknow code: "); debug_hex(code); debug("\n");
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}
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state = INIT;
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break;
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case E0_F0: // E0 break
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switch (code) {
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case 0x7C:
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state = E0_F0_7C;
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break;
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default:
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if (code < 0x80) {
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_matrix_break(code|0x80);
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} else {
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debug("ps/2 unknow code: "); debug_hex(code); debug("\n");
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}
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state = INIT;
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}
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break;
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/* PrintScreen(make) */
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case E0_12:
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switch (code) {
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case 0xE0:
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state = E0_12_E0;
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break;
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default:
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state = INIT;
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}
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break;
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case E0_12_E0:
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switch (code) {
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case 0x7C:
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_matrix_make(_PRINT_SCREEN);
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state = INIT;
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break;
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default:
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state = INIT;
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}
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break;
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/* PrintScreen(break) */
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case E0_F0_7C:
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switch (code) {
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case 0xE0:
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state = E0_F0_7C_E0;
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break;
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default:
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state = INIT;
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}
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break;
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case E0_F0_7C_E0:
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switch (code) {
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case 0xF0:
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state = E0_F0_7C_E0_F0;
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break;
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default:
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state = INIT;
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}
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break;
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case E0_F0_7C_E0_F0:
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switch (code) {
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case 0x12:
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_matrix_break(_PRINT_SCREEN);
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state = INIT;
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break;
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default:
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state = INIT;
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}
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break;
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/* Pause/Break */
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case E1:
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switch (code) {
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case 0x14:
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state = E1_14;
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break;
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default:
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state = INIT;
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}
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break;
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case E1_14:
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switch (code) {
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case 0x77:
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state = E1_14_77;
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break;
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default:
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state = INIT;
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}
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break;
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case E1_14_77:
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switch (code) {
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case 0xE1:
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state = E1_14_77_E1;
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break;
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default:
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state = INIT;
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}
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break;
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case E1_14_77_E1:
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switch (code) {
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case 0xF0:
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state = E1_14_77_E1_F0;
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break;
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default:
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state = INIT;
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}
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break;
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case E1_14_77_E1_F0:
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switch (code) {
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case 0x14:
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state = E1_14_77_E1_F0_14;
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break;
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default:
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state = INIT;
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}
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break;
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case E1_14_77_E1_F0_14:
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switch (code) {
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case 0xF0:
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state = E1_14_77_E1_F0_14_F0;
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break;
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default:
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state = INIT;
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}
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break;
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case E1_14_77_E1_F0_14_F0:
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switch (code) {
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case 0x77:
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_matrix_make(_PAUSE_BREAK);
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state = INIT;
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break;
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default:
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state = INIT;
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}
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break;
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default:
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state = INIT;
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}
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}
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static uint8_t prev_leds = 0;
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if (prev_leds != usb_keyboard_leds) {
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uint8_t leds = 0;
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if (usb_keyboard_leds&(1<<USB_LED_SCROLL_LOCK))
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leds |= (1<<PS2_LED_SCROLL_LOCK);
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if (usb_keyboard_leds&(1<<USB_LED_NUM_LOCK))
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leds |= (1<<PS2_LED_NUM_LOCK);
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if (usb_keyboard_leds&(1<<USB_LED_CAPS_LOCK))
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leds |= (1<<PS2_LED_CAPS_LOCK);
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_ps2_set_leds(leds);
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prev_leds = usb_keyboard_leds;
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}
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return 1;
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}
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bool matrix_is_modified(void)
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{
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return _matrix_is_modified;
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}
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inline
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bool matrix_has_ghost(void)
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{
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#ifdef MATRIX_HAS_GHOST
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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if (matrix_has_ghost_in_row(i))
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return true;
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}
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#endif
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return false;
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}
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inline
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bool matrix_is_on(uint8_t row, uint8_t col)
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{
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return (matrix[row] & (1<<col));
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}
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inline
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#if (MATRIX_COLS <= 8)
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uint8_t matrix_get_row(uint8_t row)
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#else
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uint16_t matrix_get_row(uint8_t row)
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#endif
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{
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return matrix[row];
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}
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void matrix_print(void)
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{
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#if (MATRIX_COLS <= 8)
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print("\nr/c 01234567\n");
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#else
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print("\nr/c 0123456789ABCDEF\n");
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#endif
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for (uint8_t row = 0; row < matrix_rows(); row++) {
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phex(row); print(": ");
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#if (MATRIX_COLS <= 8)
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pbin_reverse(matrix_get_row(row));
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#else
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pbin_reverse16(matrix_get_row(row));
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#endif
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#ifdef MATRIX_HAS_GHOST
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if (matrix_has_ghost_in_row(row)) {
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print(" <ghost");
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}
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#endif
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print("\n");
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}
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}
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uint8_t matrix_key_count(void)
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{
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uint8_t count = 0;
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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#if (MATRIX_COLS <= 8)
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count += bitpop(matrix[i]);
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#else
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count += bitpop16(matrix[i]);
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#endif
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}
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return count;
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}
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#ifdef MATRIX_HAS_GHOST
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inline
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static bool matrix_has_ghost_in_row(uint8_t row)
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{
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// no ghost exists in case less than 2 keys on
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if (((matrix[row] - 1) & matrix[row]) == 0)
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return false;
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// ghost exists in case same state as other row
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for (uint8_t i=0; i < MATRIX_ROWS; i++) {
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if (i != row && (matrix[i] & matrix[row]) == matrix[row])
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return true;
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}
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return false;
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}
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#endif
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inline
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static void _matrix_make(uint8_t code)
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{
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if (!matrix_is_on(_ROW(code), _COL(code))) {
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matrix[_ROW(code)] |= 1<<_COL(code);
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_matrix_is_modified = true;
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}
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}
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inline
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static void _matrix_break(uint8_t code)
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{
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if (matrix_is_on(_ROW(code), _COL(code))) {
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matrix[_ROW(code)] &= ~(1<<_COL(code));
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_matrix_is_modified = true;
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}
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}
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static void _ps2_reset(void)
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{
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ps2_host_send(0xFF);
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ps2_host_recv(); // 0xFA
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ps2_host_recv(); // 0xAA
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_delay_ms(1000);
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}
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static void _ps2_set_leds(uint8_t leds)
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{
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ps2_host_send(0xED);
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ps2_host_recv(); // 0xFA
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ps2_host_send(leds);
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ps2_host_recv(); // 0xFA
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}
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