At the same time, with two timers to control buzzer sound, timer 0 control frequency, timer 1 control the same frequency of the duration of time, interval 2S output 1, 10, 50100200400800,1k (Hz) square wave in turn Set crystal oscillator frequency of 12MHz.

数码管静态显示及定时器和中断应用.ppt
数码管静态显示及定时器和中断应用.bmp
51.c

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