本程序实现锯齿波、方波、三角波函数信号输出，实现原理基本一致，输出数字量间隔一定时间增加1，256个时间间隔实现周期性输出，通过调节时间间隔可以改变输出信号的周期长短，通过放大器可以实现信号幅度的调整。-The program to achieve sawtooth, square, triangle wave function signal output to achieve basically the same principle, the digital output increase in a certain time interval 1,256 interval periodic output, the output signal can be changed by adjusting the time interval length of the cycle, The amplifier can achieve the adjustment of the signal amplitude.