X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=quantum%2Fmatrix.c;h=ac523482ad101e635b6b432942d768a058bb384f;hb=71857ebc3f410b918481f4a6bbed93f1cb2eec65;hp=a7dab098770192355c7bcc35355db1339527a629;hpb=508eddf8ba8548d3f71e1c09a404839beb49f45c;p=qmk_firmware.git

diff --git a/quantum/matrix.c b/quantum/matrix.c
index a7dab0987..ac523482a 100644
--- a/quantum/matrix.c
+++ b/quantum/matrix.c
@@ -25,6 +25,19 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "debug.h"
 #include "util.h"
 #include "matrix.h"
+#include "timer.h"
+
+
+/* Set 0 if debouncing isn't needed */
+
+#ifndef DEBOUNCING_DELAY
+#   define DEBOUNCING_DELAY 5
+#endif
+
+#if (DEBOUNCING_DELAY > 0)
+    static uint16_t debouncing_time;
+    static bool debouncing = false;
+#endif
 
 #if (MATRIX_COLS <= 8)
 #    define print_matrix_header()  print("\nr/c 01234567\n")
@@ -43,49 +56,30 @@ 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
-
-/* Set 0 if debouncing isn't needed */
-
-#ifndef DEBOUNCING_DELAY
-#   define DEBOUNCING_DELAY 5
+    extern const matrix_row_t matrix_mask[];
 #endif
-static uint8_t debouncing = DEBOUNCING_DELAY;
 
+#if (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
 static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
 static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
+#endif
 
 /* matrix state(1:on, 0:off) */
 static matrix_row_t matrix[MATRIX_ROWS];
 
-#if DIODE_DIRECTION == COL2ROW
-    static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-#else // ROW2COL
-    static matrix_col_t matrix_transposed[MATRIX_COLS];
-    static matrix_col_t matrix_transposed_debouncing[MATRIX_COLS];
-#endif
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
 
 #if (DIODE_DIRECTION == COL2ROW)
     static void init_cols(void);
-    static matrix_row_t read_cols(void);
+    static bool 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
+#elif (DIODE_DIRECTION == ROW2COL)
     static void init_rows(void);
-    static matrix_col_t read_rows(void);
+    static bool 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);
@@ -140,7 +134,7 @@ uint8_t matrix_cols(void) {
 //         /* PORTxn */
 //         _SFR_IO8((col_pins[c] >> 4) + 2) |= _BV(col_pins[c] & 0xF);
 //     }
-// #else
+// #elif (DIODE_DIRECTION == ROW2COL)
 //     for (int8_t c = MATRIX_COLS - 1; c >= 0; --c) {
 //         /* DDRxn */
 //         _SFR_IO8((col_pins[c] >> 4) + 1) |= _BV(col_pins[c] & 0xF);
@@ -165,28 +159,17 @@ void matrix_init(void) {
 #if (DIODE_DIRECTION == COL2ROW)
     unselect_rows();
     init_cols();
-
-    // initialize matrix state: all keys off
-    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
-        matrix[i] = 0;
-        matrix_debouncing[i] = 0;
-    }
-
-#else // ROW2COL
+#elif (DIODE_DIRECTION == ROW2COL)
     unselect_cols();
     init_rows();
+#endif
 
     // initialize matrix state: all keys off
     for (uint8_t i=0; i < MATRIX_ROWS; i++) {
         matrix[i] = 0;
+        matrix_debouncing[i] = 0;
     }
 
-    // initialize matrix state: all keys off
-    for (uint8_t i=0; i < MATRIX_COLS; i++) {
-        matrix_transposed_debouncing[i] = 0;
-    }
-#endif
-
     matrix_init_quantum();
 }
 
@@ -196,78 +179,57 @@ uint8_t matrix_scan(void)
 #if (DIODE_DIRECTION == COL2ROW)
 
     // Set row, read cols
+    for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+#       if (DEBOUNCING_DELAY > 0)
+            bool matrix_changed = read_cols_on_row(matrix_debouncing, current_row);
 
-    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");
+            if (matrix_changed) {
+                debouncing = true;
+                debouncing_time = timer_read();
             }
-            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
+            read_cols_on_row(matrix, current_row);
+#       endif
+
     }
 
-#else // ROW2COL
+#elif (DIODE_DIRECTION == 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");
+    for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
+#       if (DEBOUNCING_DELAY > 0)
+            bool matrix_changed = read_rows_on_col(matrix_debouncing, current_col);
+            if (matrix_changed) {
+                debouncing = true;
+                debouncing_time = timer_read();
             }
-            debouncing = DEBOUNCING_DELAY;
-        }
-        unselect_col(i);
-    }
+#       else
+             read_rows_on_col(matrix, current_col);
+#       endif
 
-    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
 
-    matrix_scan_quantum();
+#   if (DEBOUNCING_DELAY > 0)
+        if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
+            for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+                matrix[i] = matrix_debouncing[i];
+            }
+            debouncing = false;
+        }
+#   endif
 
+    matrix_scan_quantum();
     return 1;
 }
 
 bool matrix_is_modified(void)
 {
+#if (DEBOUNCING_DELAY > 0)
     if (debouncing) return false;
+#endif
     return true;
 }
 
@@ -322,16 +284,33 @@ static void init_cols(void)
     }
 }
 
-static matrix_row_t read_cols(void)
+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
 {
-    matrix_row_t result = 0;
+    // Store last value of row prior to reading
+    matrix_row_t last_row_value = current_matrix[current_row];
 
-    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);
+    // Clear data in matrix row
+    current_matrix[current_row] = 0;
+
+    // Select row and wait for row selecton to stabilize
+    select_row(current_row);
+    wait_us(30);
+
+    // 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);
     }
 
-    return result;
+    // Unselect row
+    unselect_row(current_row);
+
+    return (last_row_value != current_matrix[current_row]);
 }
 
 static void select_row(uint8_t row)
@@ -357,7 +336,7 @@ static void unselect_rows(void)
     }
 }
 
-#else // ROW2COL
+#elif (DIODE_DIRECTION == ROW2COL)
 
 static void init_rows(void)
 {
@@ -368,16 +347,44 @@ static void init_rows(void)
     }
 }
 
-static matrix_col_t read_rows(void)
+static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
 {
-    matrix_col_t result = 0;
+    bool matrix_changed = false;
 
-    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);
+
+    // For each row...
+    for(uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++)
+    {
+
+        // Store last value of row prior to reading
+        matrix_row_t last_row_value = current_matrix[row_index];
+
+        // Check row pin state
+        if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)) == 0)
+        {
+            // Pin LO, set col bit
+            current_matrix[row_index] |= (ROW_SHIFTER << current_col);
+        }
+        else
+        {
+            // Pin HI, clear col bit
+            current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
+        }
+
+        // Determine if the matrix changed state
+        if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
+        {
+            matrix_changed = true;
+        }
     }
 
-    return result;
+    // Unselect col
+    unselect_col(current_col);
+
+    return matrix_changed;
 }
 
 static void select_col(uint8_t col)