Add the 74HC595 Snake game project

08-74HC595-Snake/controls.h

@@ -0,0 +1,40 @@
+#ifndef _JOYSTICK_H_
+#define _JOYSTICK_H_
+
+#include <Arduino.h>
+#include <stdint.h>
+
+#define PIN_BUTTON_LEFT      1 // Red
+#define PIN_BUTTON_UP        2 // Green
+#define PIN_BUTTON_DOWN      47 // Yellow
+#define PIN_BUTTON_RIGHT     13 // Blue
+
+#define PIN_DIFFICULTY             10
+
+#define BUTTON_STABLETIME    100
+
+// Button states
+#define BUTTON_STATE_BOUNCING     (1 << 0)
+#define BUTTON_STATE_DOWN         (1 << 1)
+#define BUTTON_STATE_UP           (1 << 2)
+#define BUTTON_STATE_HELD         (1 << 3)
+
+
+typedef struct Button {
+    // What pin is this button on
+    uint8_t pin;
+    // What is the state of this button (bitmask of BUTTON_STATE_*)
+    uint8_t state;
+    // Is this button pressed when it is LOW or HIGH?
+    uint32_t pressedvalue;
+    // How long do we wait when debouncing this button
+    uint32_t debouncetime;
+    // When did we start debouncing
+    uint32_t debounce_start_time;
+} Button;
+
+int initButton(Button *button);
+int readButton(Button *button);
+uint32_t readDifficulty();
+
+#endif // _JOYSTICK_H_