Added protocol support for Macintosh keyboard M0110.

m0110_usb/matrix.c

@@ -0,0 +1,193 @@
+/*
+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/>.
+*/
+
+/*
+ * scan matrix
+ */
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <util/delay.h>
+#include "print.h"
+#include "util.h"
+#include "debug.h"
+#include "host.h"
+#include "led.h"
+#include "m0110.h"
+#include "matrix.h"
+
+
+#define CAPS        0x39
+#define CAPS_UP     (CAPS | 0x80)
+#define ROW(key)    ((key)>>3&0x0F)
+#define COL(key)    ((key)&0x07)
+
+
+static bool is_modified = false;
+
+// matrix state buffer(1:on, 0:off)
+static uint8_t *matrix;
+static uint8_t _matrix0[MATRIX_ROWS];
+
+#ifdef MATRIX_HAS_GHOST
+static bool matrix_has_ghost_in_row(uint8_t row);
+#endif
+static void register_key(uint8_t key);
+
+
+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;
+    debug_matrix = false;
+    debug_keyboard = false;
+    debug_mouse = false;
+    print("debug enabled.\n");
+
+    m0110_init();
+    // initialize matrix state: all keys off
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
+    matrix = _matrix0;
+    return;
+}
+
+uint8_t matrix_scan(void)
+{
+    uint8_t key;
+
+    is_modified = false;
+    key = m0110_recv_key();
+
+#ifdef MATRIX_HAS_LOCKING_CAPS
+    // Send Caps key up event
+    if (matrix_is_on(ROW(CAPS), COL(CAPS))) {
+        is_modified = true;
+        register_key(CAPS_UP);
+    }
+#endif
+    if (key == M0110_NULL) {
+        return 0;
+    } else {
+#ifdef MATRIX_HAS_LOCKING_CAPS    
+        if (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) {
+            // CAPS LOCK on:
+            // Ignore LockingCaps key down event
+            if (key == CAPS) return 0;
+            // Convert LockingCaps key up event into down event
+            if (key == CAPS_UP) key = CAPS;
+        } else {
+            // CAPS LOCK off:
+            // Ignore LockingCaps key up event
+            if (key == CAPS_UP) return 0;
+        }
+#endif        
+        is_modified = true;
+        register_key(key);
+    }
+
+    if (debug_enable) {
+        print("key: "); phex(key); print("\n");
+    }
+    return 1;
+}
+
+bool matrix_is_modified(void)
+{
+    return is_modified;
+}
+
+inline
+bool matrix_has_ghost(void)
+{
+#ifdef MATRIX_HAS_GHOST
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        if (matrix_has_ghost_in_row(i))
+            return true;
+    }
+#endif
+    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;
+}
+
+#ifdef MATRIX_HAS_GHOST
+inline
+static bool matrix_has_ghost_in_row(uint8_t row)
+{
+    // no ghost exists in case less than 2 keys on
+    if (((matrix[row] - 1) & matrix[row]) == 0)
+        return false;
+
+    // ghost exists in case same state as other row
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+        if (i != row && (matrix[i] & matrix[row]) == matrix[row])
+            return true;
+    }
+    return false;
+}
+#endif
+
+inline
+static void register_key(uint8_t key)
+{
+    if (key&0x80) {
+        matrix[ROW(key)] &= ~(1<<COL(key));
+    } else {
+        matrix[ROW(key)] |=  (1<<COL(key));
+    }
+}