this C program is used to program TMS320F2823 internal EPWM DMA

tms320f28335芯片epwm模块的详细配置及例程。其中包括epwm的dma方式、死区控制模块的配置、trip模块的配置等。-tms320f28335 chip module epwm detailed configuration and routines. These include epwm the dma way, dead-time control module configuration, trip module' s configuration.

在TMS320F28335中，利用ePWM控制ADC采样速率，转换完成，DMA控制器将数据从寄存器转移到内存中，并产生中断。-On chip TMS320F28335, control the adc sampling rate by ePWM. when the conversion is complete, call the DMA controller to transfer the data into memory. After that, initiate an interrupt.

利用28335自带的ADC采集两路模拟正弦信号，用DMA方式将采样值写入内存，用epwm控制采样周期。利用FFT求得两路正弦信号的相位差。-Sampling two analog sinusoidal signals, write them to the memory by DMA controller. The sampling period is controlled by the EPWM module. Calculate the phase difference by FFT meth