From 5bb7ef0012378cd800bff74680b08c587e6338e4 Mon Sep 17 00:00:00 2001
From: Jack Humbert <jack.humb@gmail.com>
Date: Sun, 13 Sep 2015 22:10:01 -0400
Subject: [PATCH] rows to col option, maybe

---
 keyboard/planck/config.h             |  3 ++
 keyboard/planck/config_definitions.h |  3 +-
 keyboard/planck/matrix.c             | 65 +++++++++++++++++++++++++++-
 3 files changed, 69 insertions(+), 2 deletions(-)

diff --git a/keyboard/planck/config.h b/keyboard/planck/config.h
index 47cf39a9..e9701277 100644
--- a/keyboard/planck/config.h
+++ b/keyboard/planck/config.h
@@ -36,6 +36,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define COLS (int []){ F1, F0, B0, C7, F4, F5, F6, F7, D4, D6, B4, D7 }
 #define ROWS (int []){ D0, D5, B5, B6 }
 
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
 /* define if matrix has ghost */
 //#define MATRIX_HAS_GHOST
 
diff --git a/keyboard/planck/config_definitions.h b/keyboard/planck/config_definitions.h
index fd138b88..2ac31126 100644
--- a/keyboard/planck/config_definitions.h
+++ b/keyboard/planck/config_definitions.h
@@ -42,7 +42,8 @@
 #define F6 0x66
 #define F7 0x67
 
-
+#define COL2ROW 0x0
+#define ROW2COL 0x1
 
 
 
diff --git a/keyboard/planck/matrix.c b/keyboard/planck/matrix.c
index 98ef55ed..8a021719 100644
--- a/keyboard/planck/matrix.c
+++ b/keyboard/planck/matrix.c
@@ -37,6 +37,11 @@ static uint8_t debouncing = DEBOUNCE;
 static matrix_row_t matrix[MATRIX_ROWS];
 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
 
+#if DIODE_DIRECTION == ROW2COL
+static matrix_row_t matrix_reversed[MATRIX_COLS];
+static matrix_row_t matrix_reversed_debouncing[MATRIX_COLS];
+#endif
+
 static matrix_row_t read_cols(void);
 static void init_cols(void);
 static void unselect_rows(void);
@@ -80,6 +85,7 @@ void matrix_init(void)
 
 uint8_t matrix_scan(void)
 {
+#if DIODE_DIRECTION == COL2ROW
     for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
         select_row(i);
         _delay_us(30);  // without this wait read unstable value.
@@ -103,6 +109,38 @@ uint8_t matrix_scan(void)
             }
         }
     }
+#else
+    for (uint8_t i = 0; i < MATRIX_COLS; i++) {
+        select_row(i);
+        _delay_us(30);  // without this wait read unstable value.
+        matrix_row_t rows = read_cols();
+        if (matrix_reversed_debouncing[i] != rows) {
+            matrix_reversed_debouncing[i] = rows;
+            if (debouncing) {
+                debug("bounce!: "); debug_hex(debouncing); debug("\n");
+            }
+            debouncing = DEBOUNCE;
+        }
+        unselect_rows();
+    }
+
+    if (debouncing) {
+        if (--debouncing) {
+            _delay_ms(1);
+        } else {
+            for (uint8_t i = 0; i < MATRIX_COLS; i++) {
+                matrix_reversed[i] = matrix_reversed_debouncing[i];
+            }
+        }
+    }
+    for (uint8_t y = 0; y < MATRIX_ROWS; y++) {
+        matrix_row_t row = 0;
+        for (uint8_t x = 0; x < MATRIX_COLS; x++) {
+            row |= ((matrix_reversed[x] & (1<<y)) >> y) << x;
+        }
+        matrix[y] = row;
+    }
+#endif
 
     return 1;
 }
@@ -147,8 +185,14 @@ uint8_t matrix_key_count(void)
 static void init_cols(void)
 {
     int B = 0, C = 0, D = 0, E = 0, F = 0;
-    for(int x = 0; x < MATRIX_COLS; x++) { 
+
+#if DIODE_DIRECTION == COL2ROW
+    for(int x = 0; x < MATRIX_COLS; x++) {
         int col = COLS[x];
+#else
+    for(int x = 0; x < MATRIX_ROWS; x++) {
+        int col = ROWS[x];
+#endif
         if ((col & 0xF0) == 0x20) { 
             B |= (1<<(col & 0x0F)); 
         } else if ((col & 0xF0) == 0x30) { 
@@ -171,8 +215,15 @@ static void init_cols(void)
 static matrix_row_t read_cols(void)
 {
     matrix_row_t result = 0;
+
+#if DIODE_DIRECTION == COL2ROW
     for(int x = 0; x < MATRIX_COLS; x++) {     
         int col = COLS[x];
+#else
+    for(int x = 0; x < MATRIX_ROWS; x++) {
+        int col = ROWS[x];
+#endif
+
         if ((col & 0xF0) == 0x20) { 
             result |= (PINB&(1<<(col & 0x0F)) ? 0 : (1<<x)); 
         } else if ((col & 0xF0) == 0x30) { 
@@ -191,8 +242,14 @@ static matrix_row_t read_cols(void)
 static void unselect_rows(void)
 {
     int B = 0, C = 0, D = 0, E = 0, F = 0;
+
+#if DIODE_DIRECTION == COL2ROW
     for(int x = 0; x < MATRIX_ROWS; x++) { 
         int row = ROWS[x];
+#else
+    for(int x = 0; x < MATRIX_COLS; x++) { 
+        int row = COLS[x];
+#endif
         if ((row & 0xF0) == 0x20) { 
             B |= (1<<(row & 0x0F)); 
         } else if ((row & 0xF0) == 0x30) { 
@@ -214,7 +271,13 @@ static void unselect_rows(void)
 
 static void select_row(uint8_t row)
 {
+
+#if DIODE_DIRECTION == COL2ROW
     int row_pin = ROWS[row];
+#else
+    int row_pin = COLS[row];
+#endif
+
     if ((row_pin & 0xF0) == 0x20) { 
         DDRB  |= (1<<(row_pin & 0x0F));
         PORTB &= ~(1<<(row_pin & 0x0F));