PIC单片机的CCP功能 //220V的交流电源直接用电阻限流,经光耦隔离,形成脉冲送到CCP2, //CCP2模块的捕捉功能,设置为每16个上升沿捕捉一次,相当于平均滤波,目的是为了减小误差 //TMR1计数的分频系数计算:假设电源为50Hz,即一个周期为20ms,16个周期为320ms //320ms=320000us,单片机用4MHz晶振,指令周期为1us,设TMR1的分频系数为K:65536×K=320000 //得K=4.88,取K=8,即TMR1的预分频系数设为1

计算并划出K个长度为2的滑动平均滤波器级联后的增益响应。使用修改的程序，画出级联3个部分的滤波器的增益响应，并验证级联后的3Db截止频率。(The gain response of K moving average filter cascaded with 2 lengths is calculated and drawn. Using the modified program, the gain response of the filter with 3 cascaded sections i