用ATMEL公司的S52内部定时器测量脉冲频率，范围从0.5Hz到30KHz，该程序已经调试成功，可以直接运用。-ATMEL Corporation with the S52 internal timer pulse measurement frequency range from 0.5 Hz to 30KHz, the debugging procedure has been successful, can be directly

S12的TC1和TC2测周期源程序，以此作为范例，网友可参考程序利用剩余的TCx测量周期，脉宽，频率，进而测量PWM频率占空比等。-S12 of the TC1 and TC2 test cycle source, as an example, users can refer to procedures for use of the remaining TCx measurement cycle, pulse width, freque

基于单片机的简易频率计，可测量1HZ—10KHZ的频率，精准率为1 ，可显示占空比。可测量方波，三角波，正昡波.里面包含原理图和源程序，非常实用，大家可以参考参考-Simple microcontroller-based frequency meter measurable frequency 1HZ-10KHZ, the precise rate of 1 , the duty cycle can be displayed. Meas