这是一个 stm32f4xx 的嵌入式工程项目。使用的软件为 Keil 5。是嵌入式的结业实验。
输入: 按键
输出: 数码管 (显示速度数值) 蜂鸣器 (可变速的放歌)
功能:
- 平时会在数码管显示当前速度和暂停状况
- 按下 A 键暂停，B 键播放
- 按下 # 进入 receive 模式，接收数字，再次按下 # 提交并变速。receive 模式下接收到的数值会显示在数码管
- receive 模式下按下非数字且非 # 键会取消当前的输入
- 按下 * 会在串口输出当前状态的调试信息
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