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39 lines
668 B
39 lines
668 B
/**
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* 使用定时器来轮询Key_Scan()函数，定时节拍为2ms,
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* 状态转换时间为10ms,即每次进入switch case语句的时间差为10ms
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* 利用该10ms的间隙跳过按键抖动
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*/
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#ifndef _bsp_btn_H
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#define _bsp_btn_H
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// 区分长按和短按
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typedef enum
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{
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NULL_KEY = 0,
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SHORT_KEY = 1,
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LONG_KEY = 2,
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}KEY_TYPE;
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// 按键状态：检测、确认、释放
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typedef enum
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{
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KEY_CHECK = 0,
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KEY_COMFIRM = 1,
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KEY_RELEASE = 2,
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}KEY_STATE;
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// 按键值
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typedef enum
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{
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KEY_NULL,
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KEY_UP,
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KEY_DOWN,
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KEY_PWR,
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}KEY_VALUE;
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extern KEY_VALUE g_Key;
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extern KEY_TYPE g_KeyActionFlag;
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extern void Key_Scan(void);
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