Fix debouncing issue for eager algos (#73)

changelog.md

@@ -28,6 +28,7 @@
 05-29-2019 - Fixing matrix_scan so it properly returns changed status  
 05-29-2019 - Add belgian layour for sendstring (qmk#6008)  
 06-03-2019 - Overhaul of AutoShift feature (qmk#6067)  
+06-05-2019 - Fix Eager Per Key and Eager Per Row debouncing stuck keys   
 06-05-2019 - Add additional pins for Teensy 3.x and LC   
 06-05-2019 - Parameterize STM32 I2C pin modes and timing parameters. (qmk#5671)  
 06-05-2019 - Fix compiler error for ATSAM based keyboards  

quantum/debounce/eager_pk.c

@@ -39,6 +39,7 @@ No further inputs are accepted until DEBOUNCE milliseconds have occurred.
 
 static debounce_counter_t *debounce_counters;
 static bool                counters_need_update;
+static bool                matrix_need_update;
 
 #define DEBOUNCE_ELAPSED 251
 #define MAX_DEBOUNCE (DEBOUNCE_ELAPSED - 1)
@@ -63,7 +64,7 @@ void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool
     update_debounce_counters(num_rows, current_time);
   }
 
-  if (changed) {
+  if (changed || matrix_need_update) {
     transfer_matrix_values(raw, cooked, num_rows, current_time);
   }
 }
@@ -88,16 +89,22 @@ void update_debounce_counters(uint8_t num_rows, uint8_t current_time) {
 
 // upload from raw_matrix to final matrix;
 void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time) {
+  matrix_need_update = false;
   debounce_counter_t *debounce_pointer = debounce_counters;
   for (uint8_t row = 0; row < num_rows; row++) {
     matrix_row_t delta        = raw[row] ^ cooked[row];
     matrix_row_t existing_row = cooked[row];
     for (uint8_t col = 0; col < MATRIX_COLS; col++) {
       matrix_row_t col_mask = (ROW_SHIFTER << col);
-      if ((delta & col_mask) && *debounce_pointer == DEBOUNCE_ELAPSED) {
-        *debounce_pointer    = current_time;
-        counters_need_update = true;
-        existing_row ^= col_mask;  // flip the bit.
+      if (delta & col_mask) {
+        if (*debounce_pointer == DEBOUNCE_ELAPSED) {
+        counters_need_update = true;	          *debounce_pointer    = current_time;
+          *debounce_pointer    = current_time;
+          counters_need_update = true;
+          existing_row ^= col_mask;  // flip the bit.
+        } else {
+          matrix_need_update = true;
+        }
       }
       debounce_pointer++;
     }

quantum/debounce/eager_pr.c

@@ -28,6 +28,7 @@ No further inputs are accepted until DEBOUNCE milliseconds have occurred.
 #endif
 
 #define debounce_counter_t uint8_t
+static bool                matrix_need_update;
 
 static debounce_counter_t *debounce_counters;
 static bool                counters_need_update;
@@ -53,7 +54,7 @@ void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool
     update_debounce_counters(num_rows, current_time);
   }
 
-  if (changed || (needed_update && !counters_need_update)) {
+  if (changed || (needed_update && !counters_need_update) || matrix_need_update) {
     transfer_matrix_values(raw, cooked, num_rows, current_time);
   }
 }
@@ -76,18 +77,22 @@ void update_debounce_counters(uint8_t num_rows, uint8_t current_time) {
 
 // upload from raw_matrix to final matrix;
 void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time) {
+  matrix_need_update = false;
   debounce_counter_t *debounce_pointer = debounce_counters;
   for (uint8_t row = 0; row < num_rows; row++) {
     matrix_row_t existing_row = cooked[row];
     matrix_row_t raw_row      = raw[row];
 
     // determine new value basd on debounce pointer + raw value
-    if (*debounce_pointer == DEBOUNCE_ELAPSED && (existing_row != raw_row)) {
-      *debounce_pointer    = current_time;
-      cooked[row]          = raw_row;
-      counters_need_update = true;
+    if (existing_row != raw_row) {
+      if (*debounce_pointer == DEBOUNCE_ELAPSED) {
+        *debounce_pointer    = current_time;
+        cooked[row]          = raw_row;
+        counters_need_update = true;
+      } else {
+        matrix_need_update = true;
+      }
     }
-
     debounce_pointer++;
   }
 }