这是我们学校在进行电子设计竞赛选拔赛时我写的用单片机产生脉冲的C51程序，含步进，效果不错，祝大家使用愉快，多多分享！-This is our school trials in electronic design competition, I write pulse generated by the C51 single-chip process, including step, well, I wish you all use a happy and a lot to share!