数字频率计课程设计 描述计时功能等功能-Digital frequency meter function of curriculum design, timing and other functions described in

设计一个8位数字频率计，频率测量范围10Hz到25MHz，测量精度为1Hz；并将测量结果用8个数码管显示。-Design an 8-bit digital frequency meter, frequency range 10Hz to 25MHz, measurement accuracy of 1Hz the measurement results with 8 digital display.