void matrix_init(void) { PC98_RST_DDR |= (1<<PC98_RST_BIT); PC98_RDY_DDR |= (1<<PC98_RDY_BIT); PC98_RTY_DDR |= (1<<PC98_RTY_BIT); PC98_RST_PORT |= (1<<PC98_RST_BIT); PC98_RDY_PORT |= (1<<PC98_RDY_BIT); PC98_RTY_PORT |= (1<<PC98_RTY_BIT); serial_init(); // PC98 reset /* PC98_RST_PORT &= ~(1<<PC98_RST_BIT); _delay_us(15); PC98_RST_PORT |= (1<<PC98_RST_BIT); _delay_us(13); PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT); */ _delay_ms(500); pc98_inhibit_repeat(); // PC98 ready PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT); // initialize matrix state: all keys off for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00; debug("init\n"); return; }
void matrix_init(void) { debug_keyboard = true; PC98_RST_DDR |= (1<<PC98_RST_BIT); PC98_RDY_DDR |= (1<<PC98_RDY_BIT); PC98_RTY_DDR |= (1<<PC98_RTY_BIT); PC98_RST_PORT |= (1<<PC98_RST_BIT); PC98_RDY_PORT |= (1<<PC98_RDY_BIT); PC98_RTY_PORT |= (1<<PC98_RTY_BIT); serial_init(); // PC98 reset // https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n359 PC98_RDY_PORT |= (1<<PC98_RDY_BIT); // RDY: high PC98_RST_PORT &= ~(1<<PC98_RST_BIT); // RST: low _delay_us(15); // > 13us PC98_RST_PORT |= (1<<PC98_RST_BIT); // RST: high _delay_ms(50); pc98_inhibit_repeat(); // initialize matrix state: all keys off for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00; // ready to receive from keyboard PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT); // RDY: low print("matrix_init done.\n"); return; }
uint8_t matrix_scan(void) { uint16_t code; PC98_RDY_PORT |= (1<<PC98_RDY_BIT); _delay_us(30); code = serial_recv2(); PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT); if (code == -1) return 0; if (code == 0x60) { pc98_inhibit_repeat(); /* PC98_RDY_PORT |= (1<<PC98_RDY_BIT); _delay_ms(100); serial_send(0x96); PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT); */ return 0; } print_hex8(code); print(" "); if (code&0x80) { // break code if (matrix_is_on(ROW(code), COL(code))) { matrix[ROW(code)] &= ~(1<<COL(code)); } } else { // make code if (!matrix_is_on(ROW(code), COL(code))) { matrix[ROW(code)] |= (1<<COL(code)); } } return code; }