added drivers

app/drivers/hw_button/hw_button.h

@@ -0,0 +1,46 @@
+#pragma once
+
+#define BTN_DEFAULT_DEBOUNCE_MS 20
+#define BTN_DEFAULT_LONGPRESSED_MS 1000
+#define BTN_DEFAULT_REPEAT_MS 200
+
+// States for state machine
+typedef enum
+{
+    IDLE = 0,
+    DEBOUNCE,
+    PRESSED,
+    LONGPRESSED,
+    REPEAT,
+    MAX_STATE
+} ButtonState_t;
+
+// Struct for button
+typedef struct ButtonKey ButtonKey_t;
+typedef void (*buttonPressed_t)(ButtonKey_t *key);
+typedef void (*buttonLongPressed_t)(ButtonKey_t *key);
+typedef void (*buttonRepeat_t)(ButtonKey_t *key);
+
+struct ButtonKey
+{
+    uint8_t instance;    // Button name/number
+    ButtonState_t state; // Button current state
+
+    GPIO_TypeDef *gpio_port; // GPIO Port for a button
+    uint16_t gpio_pin;       // GPIO Pin for a button
+    GPIO_PinState pushed_state;
+
+    uint32_t last_tick;          // Last remembered time before steps
+    uint32_t timer_debounce;     // Fixed, settable time for debounce timer
+    uint32_t timer_long_pressed; // Fixed, adjustable time for long press timer
+    uint32_t timer_repeat_delay; // Fixed, adjustable interval time
+
+    buttonPressed_t buttonReleased;        // A callback for button released
+    buttonPressed_t buttonPressed;         // A callback for button pressed
+    buttonLongPressed_t buttonLongPressed; // A callback for long pressed
+    buttonRepeat_t buttonRepeat;           // A callback for repeat
+};
+
+// Public functions
+
+void buttonHandler(ButtonKey_t *key);