频率、幅度、占空比可调方波，有proteus仿真，可通过示波器查看，按键 12调整频率 34调整幅值 56调整占空比 -Frequency, amplitude, variable duty cycle square wave, and proteus simulation, can be read through the oscilloscope, adjust the frequency of 34 keys 12 to adjust the amplitude to adjust th

配合proteus 仿真电路使用，使用KEIL下编程，产生正弦信号经DAC,再滤波，可以清楚地看到LPC的仿真结果-With proteus simulation circuit used to use under KEIL programming, generation of sinusoidal signal by the DAC, and then filtering, it is clear that the simulation results of LPC