新增 Hc05 类，支持 HC-05 蓝牙模块的串口通信，增加串口设置波特率函数

Core/App/Common/key.hpp

@@ -0,0 +1,31 @@
+#pragma once
+
+#include "../Helper/delay_helper.h"
+#include "stm32h5xx_hal_gpio.h"
+#include <cstdint>
+
+#include "../Helper/gpio_helper.hpp"
+
+class Key {
+private:
+    static constexpr uint32_t kDebounceDelay = 20;
+    GpioHelper::Gpio gpio;
+    GPIO_PinState normalStatus;
+
+public:
+    explicit Key(GpioHelper::Gpio gpio, GPIO_PinState normalStatus) : gpio(gpio), normalStatus(normalStatus) {
+        GpioHelper::GpioInit(gpio, GPIO_MODE_INPUT, normalStatus ? GPIO_PULLUP : GPIO_PULLDOWN);
+    }
+
+    bool IsPressed() {
+        auto reading = gpio.Read();
+        if (reading != normalStatus) {
+            DelayMs(kDebounceDelay);
+            reading = gpio.Read();
+            if (reading != normalStatus) {
+                return true;
+            }
+        }
+        return false;
+    }
+};