51单片机12MHZ晶振用定时器怎样实现100ms的定时,我想要做秒表,用数码...答:include<reg52.h> define uchar unsigned char define uint unsigned int void Delay_ms(uint u){while(u--);} sbit P20=P2^0;sbit P21=P2^1;sbit P22=P2^2;//uchar code a []={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//uchar code a[10] = {0x03, 0x9f,...