2 Copyright 2012 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>
27 #include "protocol/serial.h"
46 static uint8_t matrix[MATRIX_ROWS];
47 #define ROW(code) ((code>>3)&0xF)
48 #define COL(code) (code&0x07)
51 static void pc98_send(uint8_t data)
53 xprintf("s%02X ", data);
54 PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
58 PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
61 static int16_t pc98_wait_response(void)
64 uint8_t timeout = 255;
65 while (timeout-- && (code = serial_recv2()) == -1) _delay_ms(1);
66 xprintf("r%04X ", code);
70 static void pc98_inhibit_repeat(void)
75 code = pc98_wait_response();
76 if (code != -1) dprintf("send 9C: %02X\n", code);
77 if (code != 0xFA) return;
80 code = pc98_wait_response();
81 if (code != -1) dprintf("send 70: %02X\n", code);
82 if (code != 0xFA) goto RETRY;
85 static uint8_t pc98_led = 0;
86 static void pc98_led_set(void)
91 code = pc98_wait_response();
92 if (code != -1) dprintf("send 9D: %02X\n", code);
93 if (code != 0xFA) return;
96 code = pc98_wait_response();
97 if (code != -1) dprintf("send %02X: %02X\n", pc98_led, code);
98 if (code != 0xFA) goto RETRY;
101 void matrix_init(void)
103 PC98_RST_DDR |= (1<<PC98_RST_BIT);
104 PC98_RDY_DDR |= (1<<PC98_RDY_BIT);
105 PC98_RTY_DDR |= (1<<PC98_RTY_BIT);
106 PC98_RST_PORT |= (1<<PC98_RST_BIT);
107 PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
108 PC98_RTY_PORT |= (1<<PC98_RTY_BIT);
114 // https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n359
115 PC98_RDY_PORT |= (1<<PC98_RDY_BIT); // RDY: high
116 PC98_RST_PORT &= ~(1<<PC98_RST_BIT); // RST: low
117 _delay_us(15); // > 13us
118 PC98_RST_PORT |= (1<<PC98_RST_BIT); // RST: high
121 pc98_inhibit_repeat();
123 // initialize matrix state: all keys off
124 for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
126 // ready to receive from keyboard
127 PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT); // RDY: low
132 uint8_t matrix_scan(void)
135 code = serial_recv2();
137 #ifdef PC98_LED_CONTROL
138 // Before sending command we have to make sure that there is no unprocessed key in queue
139 // otherwise keys will be missed during sending command
148 xprintf("r%02X ", code);
152 if (matrix_is_on(ROW(code), COL(code))) {
153 matrix[ROW(code)] &= ~(1<<COL(code));
157 if (!matrix_is_on(ROW(code), COL(code))) {
158 matrix[ROW(code)] |= (1<<COL(code));
162 // PC-9801V keyboard requires RDY pulse.
163 // This is not optimal place though, it works.
164 PC98_RDY_PORT |= (1<<PC98_RDY_BIT); // RDY: high
166 PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT); // RDY: low
171 uint8_t matrix_get_row(uint8_t row)
176 void led_set(uint8_t usb_led)
178 // https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n161
179 // http://www.webtech.co.jp/company/doc/undocumented_mem/io_kb.txt
181 if (usb_led & (1<<USB_LED_NUM_LOCK)) pc98_led |= (1<<0);
182 if (usb_led & (1<<USB_LED_CAPS_LOCK)) pc98_led |= (1<<2);
183 dprintf("usb_led: %02X\n", usb_led);
184 dprintf("pc98_led: %02X\n", pc98_led);