2 Copyright 2014 Jun Wako <wakojun@gmail.com>
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include <util/delay.h>
30 static void matrix_make(uint8_t code);
31 static void matrix_break(uint8_t code);
32 static void matrix_clear(void);
37 * IBM 4704 scan codes are assigned into 128(16x8)-cell matrix.
48 static uint8_t matrix[MATRIX_ROWS];
50 // scan code bits 7654 3210
51 // R:row/C:column -RRR RCCC
52 #define ROW(code) ((code>>3)&0x0f)
53 #define COL(code) (code&0x07)
57 uint8_t matrix_rows(void)
63 uint8_t matrix_cols(void)
68 static void enable_break(void)
71 print("Enable break: ");
72 // valid scancode: 00-77h
73 for (uint8_t code = 0; code < 0x78; code++) {
74 while (ibm4704_send(0x80|code) != 0) {
81 xprintf("c%02X:r%02X ", code, ret);
86 while (ibm4704_send(0xFF) != 0) { _delay_us(500); } // End
90 void matrix_init(void)
99 while ((ret = ibm4704_recv()) == 0xFF) {
104 _delay_ms(2000); // wait for starting up debug console
105 print("IBM 4704 converter\n");
106 xprintf("Keyboard ID: %02X\n", ret);
113 uint8_t matrix_scan(void)
115 uint8_t code = ibm4704_recv();
119 } else if ((code&0x78)==0x78) {
120 // 0xFF-F8 and 0x7F-78 is not scancode
121 xprintf("Error: %0X\n", code);
124 } else if (code&0x80) {
133 bool matrix_is_on(uint8_t row, uint8_t col)
135 return (matrix[row] & (1<<col));
139 uint8_t matrix_get_row(uint8_t row)
144 void matrix_print(void)
146 print("\nr/c 01234567\n");
147 for (uint8_t row = 0; row < matrix_rows(); row++) {
148 xprintf("%02X: %08b\n", row, bitrev(matrix_get_row(row)));
155 static void matrix_make(uint8_t code)
157 matrix[ROW(code)] |= 1<<COL(code);
161 static void matrix_break(uint8_t code)
163 matrix[ROW(code)] &= ~(1<<COL(code));
167 static void matrix_clear(void)
169 for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;