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: 00-79h
73 for (uint8_t code = 0; code < 0x7A; code++) {
74 while (ibm4704_send(0x80|code)) _delay_ms(1);
75 // get none when ok, get FD when out of bound
77 if ((ret = ibm4704_recv()) != 0xff) {
78 xprintf("c%02X:r%02X ", code, ret);
83 while (ibm4704_send(0xFF)) { _delay_ms(1); } // End
87 void matrix_init(void)
94 _delay_ms(2000); // wait for starting up debug console
96 print("IBM 4704 converter\n");
97 while (ibm4704_send(0xFE)) _delay_ms(1); // resend
99 xprintf("Keyboard ID: %02X\n", ibm4704_recv());
106 uint8_t matrix_scan(void)
108 uint8_t code = ibm4704_recv();
112 } else if ((code&0x7F) >= 0x7A) {
113 // 0xFF-FA and 0x7F-7A is not scancode
114 xprintf("Error: %02X\n", code);
117 } else if (code&0x80) {
118 dprintf("%02X\n", code);
121 dprintf("%02X\n", code);
128 bool matrix_is_on(uint8_t row, uint8_t col)
130 return (matrix[row] & (1<<col));
134 uint8_t matrix_get_row(uint8_t row)
139 void matrix_print(void)
141 print("\nr/c 01234567\n");
142 for (uint8_t row = 0; row < matrix_rows(); row++) {
143 xprintf("%02X: %08b\n", row, bitrev(matrix_get_row(row)));
150 static void matrix_make(uint8_t code)
152 matrix[ROW(code)] |= 1<<COL(code);
156 static void matrix_break(uint8_t code)
158 matrix[ROW(code)] &= ~(1<<COL(code));
162 static void matrix_clear(void)
164 for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;