Input handling and debouncing (#148)

* Add input driver and definitions for target_f2

* Add input_dump example

* Invert charge input

* Fix back and left button configuration

* remove input debug

* input testing case

* move header

* lint code

Co-authored-by: aanper <mail@s3f.ru>

applications/input/input.h

@@ -0,0 +1,40 @@
+#ifndef __INPUT_H
+#define __INPUT_H
+
+#include <stdbool.h>
+
+#define INPUT_COUNT 7
+
+typedef enum {
+    InputUp = 0,
+    InputDown,
+    InputRight,
+    InputLeft,
+    InputOk,
+    InputBack,
+    InputCharging,
+} Input;
+
+typedef struct {
+    Input input;
+    bool state;
+} InputEvent;
+
+typedef struct {
+    bool up : 1;
+    bool down : 1;
+    bool right : 1;
+    bool left : 1;
+    bool ok : 1;
+    bool back : 1;
+    bool charging : 1;
+} __attribute__((packed)) InputState;
+
+#define _BITS2STATE(bits)                                                                        \
+    {                                                                                            \
+        .up = (((bits)&0x01) != 0), .down = (((bits)&0x02) != 0), .right = (((bits)&0x04) != 0), \
+        .left = (((bits)&0x08) != 0), .ok = (((bits)&0x10) != 0), .back = (((bits)&0x20) != 0),  \
+        .charging = (((bits)&0x40) != 0)                                                         \
+    }
+
+#endif /* __INPUT_H */