STC15单片机的输出SPWM波，带头文件，还有正弦表数值计算表，直接计算替换代码相应部分即可实现自己的点数、频率、占空比控制。-STC15 microcontroller output SPWM wave, lead documents, as well as the sine table numerical table, replace the code directly calculate the corresponding portion of their points can be realized, frequency, duty cycle control.