From 30f9baf8985f3caa626bcd0eef8519b93f23669b Mon Sep 17 00:00:00 2001
From: tmk <nobody@nowhere>
Date: Tue, 12 Mar 2013 16:05:50 +0900
Subject: Fix debouncing and add legacy keymap support

---
 keyboard/hbkb/matrix.c | 65 ++++++++++++++++----------------------------------
 1 file changed, 21 insertions(+), 44 deletions(-)

(limited to 'keyboard/hbkb/matrix.c')

diff --git a/keyboard/hbkb/matrix.c b/keyboard/hbkb/matrix.c
index a24d24b8c3..f6830a0f71 100644
--- a/keyboard/hbkb/matrix.c
+++ b/keyboard/hbkb/matrix.c
@@ -32,32 +32,16 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *   COL: PD0-7
  *   ROW: PB0-7, PF4-7
  */
-
-#if (MATRIX_COLS > 16)
-#   error "MATRIX_COLS must not exceed 16"
-#endif
-#if (MATRIX_ROWS > 255)
-#   error "MATRIX_ROWS must not exceed 255"
-#endif
-
-
 #ifndef DEBOUNCE
-#   define DEBOUNCE	0
+#   define DEBOUNCE	10
 #endif
 static uint8_t debouncing = DEBOUNCE;
 
 // matrix state buffer(1:on, 0:off)
-#if (MATRIX_COLS <= 8)
 static uint8_t *matrix;
-static uint8_t *matrix_prev;
-static uint8_t _matrix0[MATRIX_ROWS];
-static uint8_t _matrix1[MATRIX_ROWS];
-#else
-static uint16_t *matrix;
-static uint16_t *matrix_prev;
-static uint16_t _matrix0[MATRIX_ROWS];
-static uint16_t _matrix1[MATRIX_ROWS];
-#endif
+static uint8_t *matrix_debouncing;
+static uint8_t matrix0[MATRIX_ROWS];
+static uint8_t matrix1[MATRIX_ROWS];
 
 #ifdef MATRIX_HAS_GHOST
 static bool matrix_has_ghost_in_row(uint8_t row);
@@ -100,37 +84,35 @@ void matrix_init(void)
     PORTD = 0xFF;
 
     // initialize matrix state: all keys off
-    for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
-    for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix1[i] = 0x00;
-    matrix = _matrix0;
-    matrix_prev = _matrix1;
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix0[i] = 0x00;
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix1[i] = 0x00;
+    matrix = matrix0;
+    matrix_debouncing = matrix1;
 }
 
 uint8_t matrix_scan(void)
 {
-    if (!debouncing) {
-        uint8_t *tmp = matrix_prev;
-        matrix_prev = matrix;
-        matrix = tmp;
-    }
-
     for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-        unselect_rows();
         select_row(i);
         _delay_us(30);  // without this wait read unstable value.
-        if (matrix[i] != (uint8_t)~read_col()) {
-            matrix[i] = (uint8_t)~read_col();
+        if (matrix_debouncing[i] != read_col()) {
+            matrix_debouncing[i] = read_col();
             if (debouncing) {
-                debug("bounce!: "); debug_hex(debouncing); print("\n");
+                debug("bounce!: "); debug_hex(debouncing); debug("\n");
             }
-            _delay_ms(1);   // TODO: work around. HAHAHAHAHAAHA
             debouncing = DEBOUNCE;
         }
+        unselect_rows();
     }
-    unselect_rows();
 
     if (debouncing) {
-        debouncing--;
+        if (--debouncing) {
+            _delay_ms(1);
+        } else {
+            uint8_t *tmp = matrix;
+            matrix = matrix_debouncing;
+            matrix_debouncing = tmp;
+        }
     }
 
     return 1;
@@ -139,12 +121,7 @@ uint8_t matrix_scan(void)
 bool matrix_is_modified(void)
 {
     if (debouncing) return false;
-    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-        if (matrix[i] != matrix_prev[i]) {
-            return true;
-        }
-    }
-    return false;
+    return true;
 }
 
 inline
@@ -202,7 +179,7 @@ static bool matrix_has_ghost_in_row(uint8_t row)
 inline
 static uint8_t read_col(void)
 {
-    return PIND;
+    return ~PIND;
 }
 
 inline
-- 
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