170 lines
3.4 KiB
C
170 lines
3.4 KiB
C
/*
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Copyright 2014 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 "action.h"
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#include "print.h"
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#include "debug.h"
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#include "util.h"
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#include "ibm4704.h"
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#include "matrix.h"
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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 matrix_clear(void);
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/*
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* Matrix Array usage:
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* IBM 4704 scan codes are assigned into 128(16x8)-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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* :| XX | 00-7F
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* f| |
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* +---------+
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*
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* Exceptions:
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*/
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static uint8_t matrix[MATRIX_ROWS];
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// scan code bits 7654 3210
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// R:row/C:column -RRR RCCC
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#define ROW(code) ((code>>3)&0x0f)
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#define COL(code) (code&0x07)
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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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static void enable_break(void)
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{
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uint8_t ret;
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print("Enable break: ");
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// valid scancode: 00-77h
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for (uint8_t code = 0; code < 0x78; code++) {
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while (ibm4704_send(0x80|code) != 0) {
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print("z");
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_delay_us(500);
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}
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_delay_us(2000);
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ret = ibm4704_recv();
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if (ret != 0xff) {
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xprintf("c%02X:r%02X ", code, ret);
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}
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_delay_us(1000);
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}
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_delay_us(1000);
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while (ibm4704_send(0xFF) != 0) { _delay_us(500); } // End
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print("End\n");
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}
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void matrix_init(void)
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{
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uint8_t ret;
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debug_enable = true;
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ibm4704_init();
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matrix_clear();
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// read keyboard id
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while ((ret = ibm4704_recv()) == 0xFF) {
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ibm4704_send(0xFE);
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_delay_us(100);
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}
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_delay_ms(2000); // wait for starting up debug console
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print("IBM 4704 converter\n");
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xprintf("Keyboard ID: %02X\n", ret);
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enable_break();
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}
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/*
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* IBM 4704 Scan Code
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*/
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uint8_t matrix_scan(void)
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{
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uint8_t code = ibm4704_recv();
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if (code==0xFF) {
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// Not receivd
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return 0;
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} else if ((code&0x78)==0x78) {
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// 0xFF-F8 and 0x7F-78 is not scancode
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xprintf("Error: %0X\n", code);
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matrix_clear();
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return 0;
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} else if (code&0x80) {
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matrix_make(code);
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} else {
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matrix_break(code);
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}
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return 1;
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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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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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void matrix_print(void)
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{
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print("\nr/c 01234567\n");
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for (uint8_t row = 0; row < matrix_rows(); row++) {
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xprintf("%02X: %08b\n", row, bitrev(matrix_get_row(row)));
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}
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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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matrix[ROW(code)] |= 1<<COL(code);
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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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matrix[ROW(code)] &= ~(1<<COL(code));
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}
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inline
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static void matrix_clear(void)
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{
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for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
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}
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