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jiuhuchechesheng
- 通过软件延时,使P3.4引脚输出两种信号,1kHz和2kHz频率,并且每隔一秒变化一次,交替进行。开关K做发声控制。-Software delay to P3.4 pin output two signals, 1kHz and 2kHz frequency, and changes every second time, alternately. Voice control switch K to do.