采用EPWM中断，在TB为0进行响应，在中断中翻转设定的一个GPIO电平，发现进入中断以及拉高电平这个过程中花费了330ns，这个时间对应200kHz的控制有些太长，该现象是否正常是否有改进空间
Using EPWM interrupt and responding to the TB is zero, flipping a set GPIO level during the interrupt found that it took 330ns to enter the interrupt and raise the level. This time corresponds to a somewhat long control time of 200kHz. Is there room for improvement in this phenomenon
