// 定义按键状态枚举
typedef enum {
    KEY_IDLE = 0,
    KEY_PRESSED = 1,
    KEY_RELEASED = 2
} KeyState_t;

// 按键映射表
const KeyMapping_t keyMappings[] = {
    {0x01, &KEY1, "呼叫按键"},
    {0x02, &KEY0, "手柄检测"},
    {0x04, &KEY3, "取消按键1"},
    {0x08, &KEY5, "增援按键"},
    {0x10, &KEY4, "护理按键"},
    {0x20, &KEY2, "换药按键"},
    // 0x40位不再映射到KEY3，避免冲突
};

void GPIO_KEY_Tick(void)
{
    static unsigned char KeyoldState = 0;
    unsigned char changedBits;
    
    // 重置所有释放状态的按键
    for (int i = 0; i < NUM_KEYS; i++) {
        if (keyVars[i] == KEY_RELEASED) {
            keyVars[i] = KEY_IDLE;
        }
    }
    
    // 检测按键状态变化
    changedBits = KeyoldState ^ gtArm.KeyState;
    
    // 处理普通按键
    for (int i = 0; i < sizeof(keyMappings)/sizeof(KeyMapping_t); i++) {
        if (changedBits & keyMappings[i].bitMask) {
            // 处理特殊延时(如果需要)
            if (keyMappings[i].needsDebounce && !UpdateDebounceCounter(i)) {
                continue;
            }
            
            // 更新按键状态
            *keyMappings[i].keyVar = (gtArm.KeyState & keyMappings[i].bitMask) ? 
                                     KEY_PRESSED : KEY_RELEASED;
        }
    }
    
    // 处理组合按键(拔针功能)
    HandleCombinationKey();
    
    // 保存当前状态
    KeyoldState = gtArm.KeyState;
}