- added const

- added static check function
- added getLastState

include/gamepad.h

@@ -24,9 +24,11 @@ class Gamepad{
         Gamepad(uint8_t latch, uint8_t clock, uint8_t data);
 
         bool isPressed(Button button);
-        bool isPressedLast(Button button);
-        uint16_t getState();
-        uint16_t getLastState();
+        bool isPressedLast(Button button) const;
+        uint16_t getState() const;
+        uint16_t getLastState() const { return this->lastState; }
+
+        static bool isPressed(uint16_t input, Button button);
     
     private:
         uint16_t readCon();

src/gamepad.cpp

@@ -1,6 +1,7 @@
 #include "gamepad.h"
 
-Gamepad::Gamepad(uint8_t latch, uint8_t clock, uint8_t data){
+Gamepad::Gamepad(uint8_t latch, uint8_t clock, uint8_t data)
+{
     this->latch = latch;
     this->clock = clock;
     this->data = data;
@@ -16,11 +17,13 @@ Gamepad::Gamepad(uint8_t latch, uint8_t clock, uint8_t data){
     pinMode(data, INPUT);
 }
 
-uint16_t Gamepad::getState(){
+uint16_t Gamepad::getState() const
+{
     return this->readCon();
 }
 
-uint16_t Gamepad::readCon(){
+uint16_t Gamepad::readCon()
+{
     uint16_t res = 0;
 
     digitalWrite(this->latch, HIGH);
@@ -28,7 +31,8 @@ uint16_t Gamepad::readCon(){
     digitalWrite(this->latch, LOW);
     delayMicroseconds(6);
 
-    for (uint8_t i = 0; i < NUM_KEYS; i++){
+    for (uint8_t i = 0; i < NUM_KEYS; i++)
+    {
         digitalWrite(this->clock, LOW);
         delayMicroseconds(6);
         res |= (!digitalRead(this->data) << i);
@@ -36,18 +40,27 @@ uint16_t Gamepad::readCon(){
         delayMicroseconds(6);
     }
 
-    lastState = res;
+    this->lastState = res;
     return res;
 }
 
-bool Gamepad::isPressed(Button button) {
-    if ((uint16_t) button &  this->readCon())
+bool Gamepad::isPressed(Button button)
+{
+    if ((uint16_t)button & this->readCon())
         return true;
     return false;
 }
 
-bool Gamepad::isPressedLast(Button button) {
-    if ((uint16_t) button &  this->lastState)
+bool Gamepad::isPressedLast(Button button) const
+{
+    if ((uint16_t)button & this->lastState)
+        return true;
+    return false;
+}
+
+bool Gamepad::isPressed(uint16_t input, Button button)
+{
+    if ((uint16_t)button & input)
         return true;
     return false;
 }