Refactoring Matrix scanning

1 files changed, 95 insertions, 78 deletions

diff --git a/quantum/matrix.c b/quantum/matrix.c
index a7dab0987..1bacea1be 100644
--- a/quantum/matrix.c
+++ b/quantum/matrix.c
@@ -43,16 +43,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #    define ROW_SHIFTER  ((uint32_t)1)
 #endif
 
-#if (MATRIX_ROWS <= 8)
-#    define COL_SHIFTER ((uint8_t)1)
-#elif (MATRIX_ROWS <= 16)
-#    define COL_SHIFTER ((uint16_t)1)
-#elif (MATRIX_ROWS <= 32)
-#    define COL_SHIFTER  ((uint32_t)1)
-#endif
-
-
-
 #ifdef MATRIX_MASKED
 extern const matrix_row_t matrix_mask[];
 #endif
@@ -70,6 +60,9 @@ static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
 /* matrix state(1:on, 0:off) */
 static matrix_row_t matrix[MATRIX_ROWS];
 
+static matrix_row_t matrix_raw[MATRIX_ROWS];
+
+
 #if DIODE_DIRECTION == COL2ROW
     static matrix_row_t matrix_debouncing[MATRIX_ROWS];
 #else // ROW2COL
@@ -79,13 +72,13 @@ static matrix_row_t matrix[MATRIX_ROWS];
 
 #if (DIODE_DIRECTION == COL2ROW)
     static void init_cols(void);
-    static matrix_row_t read_cols(void);
+    static void read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
     static void unselect_rows(void);
     static void select_row(uint8_t row);
     static void unselect_row(uint8_t row);
 #else // ROW2COL
     static void init_rows(void);
-    static matrix_col_t read_rows(void);
+    static void read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
     static void unselect_cols(void);
     static void unselect_col(uint8_t col);
     static void select_col(uint8_t col);
@@ -169,6 +162,7 @@ void matrix_init(void) {
     // initialize matrix state: all keys off
     for (uint8_t i=0; i < MATRIX_ROWS; i++) {
         matrix[i] = 0;
+        matrix_raw[i] = 0;
         matrix_debouncing[i] = 0;
     }
 
@@ -178,6 +172,7 @@ void matrix_init(void) {
 
     // initialize matrix state: all keys off
     for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+        matrix_raw[i] = 0;
         matrix[i] = 0;
     }
 
@@ -196,67 +191,73 @@ uint8_t matrix_scan(void)
 #if (DIODE_DIRECTION == COL2ROW)
 
     // Set row, read cols
-
-    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-        select_row(i);
-        wait_us(30);  // without this wait read unstable value.
-        matrix_row_t current_row = read_cols();
-        if (matrix_debouncing[i] != current_row) {
-            matrix_debouncing[i] = current_row;
-            if (debouncing) {
-                debug("bounce!: "); debug_hex(debouncing); debug("\n");
-            }
-            debouncing = DEBOUNCING_DELAY;
-        }
-        unselect_row(i);
+    for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+        read_cols_on_row(matrix, current_row);
     }
 
-    if (debouncing) {
-        if (--debouncing) {
-            wait_ms(1);
-        } else {
-            for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-                matrix[i] = matrix_debouncing[i];
-            }
-        }
-    }
+    //     select_row(i);
+    //     wait_us(30);  // without this wait read unstable value.
+    //     matrix_row_t current_row = read_cols();
+    //     if (matrix_debouncing[i] != current_row) {
+    //         matrix_debouncing[i] = current_row;
+    //         if (debouncing) {
+    //             debug("bounce!: "); debug_hex(debouncing); debug("\n");
+    //         }
+    //         debouncing = DEBOUNCING_DELAY;
+    //     }
+    //     unselect_row(i);
+    // }
+
+    // if (debouncing) {
+    //     if (--debouncing) {
+    //         wait_ms(1);
+    //     } else {
+    //         for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+    //             matrix[i] = matrix_debouncing[i];
+    //         }
+    //     }
+    // }
 
 #else // ROW2COL
 
     // Set col, read rows
-
-    for (uint8_t i = 0; i < MATRIX_COLS; i++) {
-        select_col(i);
-        wait_us(30);  // without this wait read unstable value.
-        matrix_col_t current_col = read_rows();
-        if (matrix_transposed_debouncing[i] != current_col) {
-            matrix_transposed_debouncing[i] = current_col;
-            if (debouncing) {
-                debug("bounce!: "); debug_hex(debouncing); debug("\n");
-            }
-            debouncing = DEBOUNCING_DELAY;
-        }
-        unselect_col(i);
+    for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
+        read_rows_on_col(matrix, current_col);
     }
 
-    if (debouncing) {
-        if (--debouncing) {
-            wait_ms(1);
-        } else {
-            for (uint8_t i = 0; i < MATRIX_COLS; i++) {
-                matrix_transposed[i] = matrix_transposed_debouncing[i];
-            }
-        }
-    }
 
-    // Untranspose matrix
-    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_transposed[x] & (1<<y)) >> y) << x;
-        }
-        matrix[y] = row;
-    }
+    // for (uint8_t i = 0; i < MATRIX_COLS; i++) {
+    //     select_col(i);
+    //     wait_us(30);  // without this wait read unstable value.
+    //     matrix_col_t current_col = read_rows();
+    //     if (matrix_transposed_debouncing[i] != current_col) {
+    //         matrix_transposed_debouncing[i] = current_col;
+    //         if (debouncing) {
+    //             debug("bounce!: "); debug_hex(debouncing); debug("\n");
+    //         }
+    //         debouncing = DEBOUNCING_DELAY;
+    //     }
+    //     unselect_col(i);
+    // }
+
+    // if (debouncing) {
+    //     if (--debouncing) {
+    //         wait_ms(1);
+    //     } else {
+    //         for (uint8_t i = 0; i < MATRIX_COLS; i++) {
+    //             matrix_transposed[i] = matrix_transposed_debouncing[i];
+    //         }
+    //     }
+    // }
+
+    // // Untranspose matrix
+    // 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_transposed[x] & (1<<y)) >> y) << x;
+    //     }
+    //     matrix[y] = row;
+    // }
 
 #endif
 
@@ -322,16 +323,25 @@ static void init_cols(void)
     }
 }
 
-static matrix_row_t read_cols(void)
+static void read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
 {
-    matrix_row_t result = 0;
+    // Clear data in matrix row
+    current_matrix[current_row] = 0;
 
-    for(uint8_t x = 0; x < MATRIX_COLS; x++) {
-        uint8_t pin = col_pins[x];
-        result |= (_SFR_IO8(pin >> 4) & _BV(pin & 0xF)) ? 0 : (ROW_SHIFTER << x);
-    }
+    // Select row and wait for row selecton to stabilize
+    select_row(current_row);
+    wait_us(30);
 
-    return result;
+    // For each col...
+    for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
+
+        // Select the col pin to read (active low)
+        uint8_t pin = col_pins[col_index];
+        uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
+
+        // Populate the matrix row with the state of the col pin
+        current_matrix[current_row] |=  pin_state ? 0 : (ROW_SHIFTER << col_index);
+    }
 }
 
 static void select_row(uint8_t row)
@@ -368,16 +378,23 @@ static void init_rows(void)
     }
 }
 
-static matrix_col_t read_rows(void)
+static void read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
 {
-    matrix_col_t result = 0;
 
-    for(uint8_t x = 0; x < MATRIX_ROWS; x++) {
-        uint8_t pin = row_pins[x];
-        result |= (_SFR_IO8(pin >> 4) & _BV(pin & 0xF)) ? 0 : (COL_SHIFTER << x);
-    }
+    // Select col and wait for col selecton to stabilize
+    select_col(current_col);
+    wait_us(30);
 
-    return result;
+    // For each row...
+    for(uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
+
+        // Select the row pin to read (active low)
+        uint8_t pin = row_pins[row_index];
+        uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
+
+        // Populate the matrix row with the state of the col pin
+        current_matrix[row_index] &= pin_state ? ~(ROW_SHIFTER << current_col) : 0;
+    }
 }
 
 static void select_col(uint8_t col)