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-rw-r--r--keyboards/converter/ibm_terminal/matrix.c237
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diff --git a/keyboards/converter/ibm_terminal/matrix.c b/keyboards/converter/ibm_terminal/matrix.c
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+/*
+Copyright 2011 Jun Wako <wakojun@gmail.com>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <util/delay.h>
+#include "print.h"
+#include "util.h"
+#include "debug.h"
+#include "ps2.h"
+#include "matrix.h"
+
+#define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
+#define print_matrix_header() print("\nr/c 01234567\n")
+#define matrix_bitpop(i) bitpop(matrix[i])
+#define ROW_SHIFTER ((uint8_t)1)
+
+
+static void matrix_make(uint8_t code);
+static void matrix_break(uint8_t code);
+
+
+/*
+ * Matrix Array usage:
+ * 'Scan Code Set 3' is assigned into 17x8 cell matrix.
+ *
+ * 8bit wide
+ * +---------+
+ * 0| |
+ * :| | 0x00-0x87
+ * ;| |
+ * 17| |
+ * +---------+
+ */
+static uint8_t matrix[MATRIX_ROWS];
+#define ROW(code) (code>>3)
+#define COL(code) (code&0x07)
+
+
+__attribute__ ((weak))
+void matrix_init_user(void) {
+}
+
+void matrix_init(void)
+{
+ debug_enable = true;
+ //debug_matrix = true;
+ //debug_keyboard = true;
+ //debug_mouse = false;
+
+ ps2_host_init();
+
+ // initialize matrix state: all keys off
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
+
+ matrix_init_user();
+ return;
+}
+
+uint8_t matrix_scan(void)
+{
+
+ // scan code reading states
+ static enum {
+ RESET,
+ RESET_RESPONSE,
+ KBD_ID0,
+ KBD_ID1,
+ CONFIG,
+ READY,
+ F0,
+ } state = RESET;
+
+ uint8_t code;
+ if ((code = ps2_host_recv())) {
+ debug("r"); debug_hex(code); debug(" ");
+ }
+
+ switch (state) {
+ case RESET:
+ debug("wFF ");
+ if (ps2_host_send(0xFF) == 0xFA) {
+ debug("[ack]\nRESET_RESPONSE: ");
+ state = RESET_RESPONSE;
+ }
+ break;
+ case RESET_RESPONSE:
+ if (code == 0xAA) {
+ debug("[ok]\nKBD_ID: ");
+ state = KBD_ID0;
+ } else if (code) {
+ debug("err\nRESET: ");
+ state = RESET;
+ }
+ break;
+ // after reset receive keyboad ID(2 bytes)
+ case KBD_ID0:
+ if (code) {
+ state = KBD_ID1;
+ }
+ break;
+ case KBD_ID1:
+ if (code) {
+ debug("\nCONFIG: ");
+ state = CONFIG;
+ }
+ break;
+ case CONFIG:
+ debug("wF8 ");
+ if (ps2_host_send(0xF8) == 0xFA) {
+ debug("[ack]\nREADY\n");
+ state = READY;
+ }
+ break;
+ case READY:
+ switch (code) {
+ case 0x00:
+ break;
+ case 0xF0:
+ state = F0;
+ debug(" ");
+ break;
+ default: // normal key make
+ if (code < 0x88) {
+ matrix_make(code);
+ } else {
+ debug("unexpected scan code at READY: "); debug_hex(code); debug("\n");
+ }
+ state = READY;
+ debug("\n");
+ }
+ break;
+ case F0: // Break code
+ switch (code) {
+ case 0x00:
+ break;
+ default:
+ if (code < 0x88) {
+ matrix_break(code);
+ } else {
+ debug("unexpected scan code at F0: "); debug_hex(code); debug("\n");
+ }
+ state = READY;
+ debug("\n");
+ }
+ break;
+ }
+ return 1;
+}
+
+inline
+uint8_t matrix_get_row(uint8_t row)
+{
+ return matrix[row];
+}
+
+inline
+static void matrix_make(uint8_t code)
+{
+ if (!matrix_is_on(ROW(code), COL(code))) {
+ matrix[ROW(code)] |= 1<<COL(code);
+ }
+}
+
+inline
+static void matrix_break(uint8_t code)
+{
+ if (matrix_is_on(ROW(code), COL(code))) {
+ matrix[ROW(code)] &= ~(1<<COL(code));
+ }
+}
+
+bool matrix_is_on(uint8_t row, uint8_t col)
+{
+ return (matrix_get_row(row) & (1<<col));
+}
+
+void matrix_print(void)
+{
+#if (MATRIX_COLS <= 8)
+ print("r/c 01234567\n");
+#elif (MATRIX_COLS <= 16)
+ print("r/c 0123456789ABCDEF\n");
+#elif (MATRIX_COLS <= 32)
+ print("r/c 0123456789ABCDEF0123456789ABCDEF\n");
+#endif
+
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+
+#if (MATRIX_COLS <= 8)
+ xprintf("%02X: %08b%s\n", row, bitrev(matrix_get_row(row)),
+#elif (MATRIX_COLS <= 16)
+ xprintf("%02X: %016b%s\n", row, bitrev16(matrix_get_row(row)),
+#elif (MATRIX_COLS <= 32)
+ xprintf("%02X: %032b%s\n", row, bitrev32(matrix_get_row(row)),
+#endif
+#ifdef MATRIX_HAS_GHOST
+ matrix_has_ghost_in_row(row) ? " <ghost" : ""
+#else
+ ""
+#endif
+ );
+ }
+}
+
+#ifdef MATRIX_HAS_GHOST
+__attribute__ ((weak))
+bool matrix_has_ghost_in_row(uint8_t row)
+{
+ matrix_row_t matrix_row = matrix_get_row(row);
+ // No ghost exists when less than 2 keys are down on the row
+ if (((matrix_row - 1) & matrix_row) == 0)
+ return false;
+
+ // Ghost occurs when the row shares column line with other row
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+ if (i != row && (matrix_get_row(i) & matrix_row))
+ return true;
+ }
+ return false;
+}
+#endif