AT89S51单片机时钟为12MHz,利用定时器T0编程令P1.0引脚输出2ms的矩形波程序,要求占空比系数为1:3
你去看看这个https://blog.csdn.net/wang2395/article/details/107530193?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522167046136416800184197079%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=167046136416800184197079&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~blog~top_positive~default-1-107530193-null-null.nonecase&utm_term=51%E5%8D%95%E7%89%87%E6%9C%BAPWM&spm=1018.2226.3001.4450