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STM32 按键查询方式

于 2023-08-14 发布 文件大小:747.87 kB
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代码说明:

key_up是静态变量,表示只分配一次,且只在第一次分配内存时初始化。也就是说第一次调用KEY_Scan时分配该变量并且设置为1,再次调用KEY_Scan时该变量仍保持上次函数调用后的值

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