KeyboardHardware: add a 'previousPressedKeyswitchCount'

to enable the test mode

Signed-off-by: Jesse Vincent <jesse@keyboard.io>

src/kaleidoscope/Hardware.h

@@ -277,6 +277,14 @@ class Hardware {
     return false;
   }
 
+  /**
+   * Check the number of key switches pressed in the previous scan.
+   *
+   * @returns the number of keys pressed.
+   */
+  uint8_t previousPressedKeyswitchCount() {
+    return 0;
+  }
 
 
   /** @} */

src/kaleidoscope/hardware/ATMegaKeyboard.cpp

@@ -86,6 +86,14 @@ bool ATMegaKeyboard::isKeyswitchPressed(uint8_t keyIndex) {
 }
 
 
+uint8_t ATMegaKeyboard::previousPressedKeyswitchCount() {
+  uint8_t count = 0;
+
+  for (int8_t r = 0; r < KeyboardHardware.matrix_rows; r++) {
+    count += __builtin_popcount(KeyboardHardware.previousKeyState_[r]);
+  }
+  return count;
+}
 
 bool ATMegaKeyboard::wasKeyswitchPressed(uint8_t row, byte col) {
   return (bitRead(KeyboardHardware.previousKeyState_[row], col) != 0);

src/kaleidoscope/hardware/ATMegaKeyboard.h

@@ -86,6 +86,7 @@ class ATMegaKeyboard : public kaleidoscope::Hardware {
   bool isKeyswitchPressed(uint8_t row, byte col);
   bool isKeyswitchPressed(uint8_t keyIndex);
 
+  uint8_t previousPressedKeyswitchCount();
   bool wasKeyswitchPressed(uint8_t row, byte col);
   bool wasKeyswitchPressed(uint8_t keyIndex);
 

src/kaleidoscope/hardware/ez/ErgoDox.cpp

@@ -241,6 +241,14 @@ bool ErgoDox::wasKeyswitchPressed(uint8_t keyIndex) {
   return wasKeyswitchPressed(keyIndex / COLS, keyIndex % COLS);
 }
 
+uint8_t ErgoDox::previousPressedKeyswitchCount() {
+  uint8_t count = 0;
+
+  for (uint8_t r = 0; r < ROWS; r++) {
+    count += __builtin_popcount(previousKeyState_[r]);
+  }
+  return count;
+}
 
 uint8_t ErgoDox::pressedKeyswitchCount() {
   uint8_t count = 0;

src/kaleidoscope/hardware/ez/ErgoDox.h

@@ -71,6 +71,7 @@ class ErgoDox : public kaleidoscope::Hardware {
   
   bool wasKeyswitchPressed(byte row, byte col);
   bool wasKeyswitchPressed(uint8_t keyIndex);
+  uint8_t previousPressedKeyswitchCount();
 
   // ErgoDox-specific stuff
   void setStatusLED(uint8_t led, bool state = true);

src/kaleidoscope/hardware/keyboardio/Model01.cpp

@@ -323,6 +323,10 @@ uint8_t Model01::pressedKeyswitchCount() {
   return __builtin_popcountl(leftHandState.all) + __builtin_popcountl(rightHandState.all);
 }
 
+uint8_t Model01::previousPressedKeyswitchCount() {
+  return __builtin_popcountl(previousLeftHandState.all) + __builtin_popcountl(previousRightHandState.all);
+}
+
 }
 }
 }

src/kaleidoscope/hardware/keyboardio/Model01.h

@@ -74,6 +74,7 @@ class Model01 : public kaleidoscope::Hardware {
   
   bool wasKeyswitchPressed(byte row, byte col);
   bool wasKeyswitchPressed(uint8_t keyIndex);
+  uint8_t previousPressedKeyswitchCount();
 
   keydata_t leftHandState;
   keydata_t rightHandState;