4 files changed, 26 insertions(+), 31 deletions(-)

M common/keyboard.c
M common/matrix.h
M keyboard/hbkb/Makefile.lufa
M keyboard/hbkb/matrix.c

@@ 34,6 34,24 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #endif
 
 
+#ifdef MATRIX_HAS_GHOST
+static bool 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
+
+
 void keyboard_init(void)
 {
     // TODO: configuration of sendchar impl


@@ 81,7 99,12 @@ void keyboard_task(void)
         matrix_change = matrix_row ^ matrix_prev[r];
         if (matrix_change) {
             if (debug_matrix) matrix_print();
-
+#ifdef MATRIX_HAS_GHOST
+            if (has_ghost_in_row(r)) {
+                matrix_prev[r] = matrix_row;
+                continue;
+            }
+#endif
             for (uint8_t c = 0; c < MATRIX_COLS; c++) {
                 if (matrix_change & ((matrix_row_t)1<<c)) {
                     action_exec((keyevent_t){

@@ 45,14 45,10 @@ void matrix_init(void);
 uint8_t matrix_scan(void);
 /* whether modified from previous scan. used after matrix_scan. */
 bool matrix_is_modified(void);
-/* whether ghosting occur on matrix. */
-bool matrix_has_ghost(void);
 /* whether a swtich is on */
 bool matrix_is_on(uint8_t row, uint8_t col);
 /* matrix state on row */
 matrix_row_t  matrix_get_row(uint8_t row);
-/* count keys pressed */
-uint8_t matrix_key_count(void);
 /* print matrix for debug */
 void matrix_print(void);
 

@@ 99,6 99,7 @@ F_USB = $(F_CPU)
 #
 MOUSEKEY_ENABLE = yes	# Mouse keys
 EXTRAKEY_ENABLE = yes	# Audio control and System control
+CONSOLE_ENABLE = yes	# Console for debug
 #NKRO_ENABLE = yes	# USB Nkey Rollover
 #PS2_MOUSE_ENABLE = yes	# PS/2 mouse(TrackPoint) support
 

@@ 148,18 148,6 @@ bool matrix_is_modified(void)
 }
 
 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));


@@ 194,19 182,6 @@ void matrix_print(void)
     }
 }
 
-uint8_t matrix_key_count(void)
-{
-    uint8_t count = 0;
-    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-#if (MATRIX_COLS <= 8)
-        count += bitpop(matrix[i]);
-#else
-        count += bitpop16(matrix[i]);
-#endif
-    }
-    return count;
-}
-
 #ifdef MATRIX_HAS_GHOST
 inline
 static bool matrix_has_ghost_in_row(uint8_t row)


@@ 217,7 192,7 @@ static bool matrix_has_ghost_in_row(uint8_t row)
 
     // 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])
+        if (i != row && (matrix[i] & matrix[row]))
             return true;
     }
     return false;