用C8051F单片机的PCA模块的上升沿捕捉功能实现方波信号的频率检测-PCA Module C8051F MCU with the rising edge of the square wave signal capture function to achieve the frequency of detection

可以测量波形上升沿个数，并通过蓝牙串口发送到上位机上，以供观察-keyiceliangboxingshangshengyangeshu,bingtongguo lan ya chuan kou fasong dao shangweiji shang yigong guancha