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236 lines
5.7 KiB
236 lines
5.7 KiB
/*
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Copyright 2011 Jun Wako <wakojun@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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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 "matrix.h"
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#define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
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#define print_matrix_header() print("\nr/c 01234567\n")
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#define ROW_SHIFTER ((uint8_t)1)
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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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/*
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* Matrix Array usage:
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* 'Scan Code Set 3' is assigned into 17x8 cell matrix.
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*
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* 8bit wide
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* +---------+
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* 0| |
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* :| | 0x00-0x87
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* ;| |
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* 17| |
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* +---------+
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*/
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static uint8_t matrix[MATRIX_ROWS];
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#define ROW(code) (code>>3)
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#define COL(code) (code&0x07)
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__attribute__ ((weak))
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void matrix_init_user(void) {
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}
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void matrix_init(void)
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{
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debug_enable = true;
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//debug_matrix = true;
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//debug_keyboard = true;
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//debug_mouse = false;
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ps2_host_init();
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// initialize matrix state: all keys off
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for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
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matrix_init_user();
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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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// scan code reading states
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static enum {
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RESET,
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RESET_RESPONSE,
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KBD_ID0,
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KBD_ID1,
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CONFIG,
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READY,
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F0,
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} state = RESET;
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uint8_t code;
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if ((code = ps2_host_recv())) {
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debug("r"); debug_hex(code); debug(" ");
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}
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switch (state) {
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case RESET:
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debug("wFF ");
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if (ps2_host_send(0xFF) == 0xFA) {
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debug("[ack]\nRESET_RESPONSE: ");
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state = RESET_RESPONSE;
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}
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break;
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case RESET_RESPONSE:
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if (code == 0xAA) {
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debug("[ok]\nKBD_ID: ");
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state = KBD_ID0;
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} else if (code) {
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debug("err\nRESET: ");
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state = RESET;
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}
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break;
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// after reset receive keyboard ID(2 bytes)
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case KBD_ID0:
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if (code) {
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state = KBD_ID1;
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}
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break;
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case KBD_ID1:
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if (code) {
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debug("\nCONFIG: ");
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state = CONFIG;
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}
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break;
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case CONFIG:
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debug("wF8 ");
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if (ps2_host_send(0xF8) == 0xFA) {
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debug("[ack]\nREADY\n");
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state = READY;
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}
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break;
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case READY:
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switch (code) {
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case 0x00:
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break;
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case 0xF0:
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state = F0;
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debug(" ");
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break;
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default: // normal key make
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if (code < 0x88) {
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matrix_make(code);
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} else {
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debug("unexpected scan code at READY: "); debug_hex(code); debug("\n");
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}
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state = READY;
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debug("\n");
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}
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break;
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case F0: // Break code
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switch (code) {
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case 0x00:
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break;
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default:
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if (code < 0x88) {
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matrix_break(code);
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} else {
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debug("unexpected scan code at F0: "); debug_hex(code); debug("\n");
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}
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state = READY;
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debug("\n");
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}
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break;
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}
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return 1;
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}
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inline
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uint8_t matrix_get_row(uint8_t row)
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{
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return matrix[row];
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}
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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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}
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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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}
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}
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bool matrix_is_on(uint8_t row, uint8_t col)
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{
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return (matrix_get_row(row) & (1<<col));
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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("r/c 01234567\n");
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#elif (MATRIX_COLS <= 16)
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print("r/c 0123456789ABCDEF\n");
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#elif (MATRIX_COLS <= 32)
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print("r/c 0123456789ABCDEF0123456789ABCDEF\n");
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#endif
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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#if (MATRIX_COLS <= 8)
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xprintf("%02X: %08b%s\n", row, bitrev(matrix_get_row(row)),
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#elif (MATRIX_COLS <= 16)
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xprintf("%02X: %016b%s\n", row, bitrev16(matrix_get_row(row)),
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#elif (MATRIX_COLS <= 32)
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xprintf("%02X: %032b%s\n", row, bitrev32(matrix_get_row(row)),
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#endif
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#ifdef MATRIX_HAS_GHOST
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matrix_has_ghost_in_row(row) ? " <ghost" : ""
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#else
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""
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#endif
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);
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}
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}
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#ifdef MATRIX_HAS_GHOST
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__attribute__ ((weak))
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bool matrix_has_ghost_in_row(uint8_t row)
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{
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matrix_row_t matrix_row = matrix_get_row(row);
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// No ghost exists when less than 2 keys are down on the row
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if (((matrix_row - 1) & matrix_row) == 0)
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return false;
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// Ghost occurs when the row shares column line with other row
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for (uint8_t i=0; i < MATRIX_ROWS; i++) {
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if (i != row && (matrix_get_row(i) & 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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