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-rw-r--r--converter/sun_usb/matrix.c180
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diff --git a/converter/sun_usb/matrix.c b/converter/sun_usb/matrix.c
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+++ b/converter/sun_usb/matrix.c
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+/*
+Copyright 2012 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 "serial.h"
+#include "matrix.h"
+#include "debug.h"
+
+
+/*
+ * Matrix Array usage:
+ *
+ * ROW: 16(4bits)
+ * COL: 8(3bits)
+ *
+ * 8bit wide
+ * +---------+
+ * 0|00 ... 07|
+ * 1|08 ... 0F|
+ * :| ... |
+ * :| ... |
+ * E|70 ... 77|
+ * F|78 ... 7F|
+ * +---------+
+ *
+ * Command From System To Keyboard
+ * 0x01 Reset
+ * 0x02 Bell On
+ * 0x03 Bell Off
+ * 0x0A Click On
+ * 0x0B Click Off
+ * 0x0E LED
+ * 0x0F Layout
+ *
+ * Command From Keyboard To System
+ * 0x7F Idle
+ * 0xFE Layout Response
+ * 0xFF Reset Response(followed by 0x04)
+ *
+ * bit: 3 2 1 0
+ * LED: CapsLk ScrLk Compose NumLk
+ *
+ * Connector
+ * 8Pin mini DIN
+ * 8 7 6
+ * 5 4 3
+ * 2 1
+ * receptacle
+ *
+ * 1: GND
+ * 2: GND
+ * 3: 5V
+ * 4: RX/TX(Mouse)
+ * 5: RX
+ * 6: TX
+ * 7: GND
+ * 8: 5V
+ */
+static uint8_t matrix[MATRIX_ROWS];
+#define ROW(code) ((code>>3)&0xF)
+#define COL(code) (code&0x07)
+
+static bool is_modified = false;
+
+
+inline
+uint8_t matrix_rows(void)
+{
+ return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void)
+{
+ return MATRIX_COLS;
+}
+
+void matrix_init(void)
+{
+ print_enable = true;
+ debug_enable = true;
+
+ serial_init();
+
+ // initialize matrix state: all keys off
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
+
+ return;
+}
+
+uint8_t matrix_scan(void)
+{
+ is_modified = false;
+
+ uint8_t code;
+ code = serial_recv();
+ if (code == 0) {
+ return 0;
+ }
+
+ phex(code); print("(");
+ code = ~code;
+ phex(code); print(")");
+return 0;
+ if (code&0x80) {
+ // break code
+ if (matrix_is_on(ROW(code), COL(code))) {
+ matrix[ROW(code)] &= ~(1<<COL(code));
+ is_modified = true;
+ }
+ } else {
+ // make code
+ if (!matrix_is_on(ROW(code), COL(code))) {
+ matrix[ROW(code)] |= (1<<COL(code));
+ is_modified = true;
+ }
+ }
+ return code;
+}
+
+bool matrix_is_modified(void)
+{
+ return is_modified;
+}
+
+inline
+bool matrix_has_ghost(void)
+{
+ return false;
+}
+
+inline
+bool matrix_is_on(uint8_t row, uint8_t col)
+{
+ return (matrix[row] & (1<<col));
+}
+
+inline
+uint8_t matrix_get_row(uint8_t row)
+{
+ return matrix[row];
+}
+
+void matrix_print(void)
+{
+ print("\nr/c 01234567\n");
+ for (uint8_t row = 0; row < matrix_rows(); row++) {
+ phex(row); print(": ");
+ pbin_reverse(matrix_get_row(row));
+ print("\n");
+ }
+}
+
+uint8_t matrix_key_count(void)
+{
+ uint8_t count = 0;
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ count += bitpop(matrix[i]);
+ }
+ return count;
+}