#include #define uchar unsigned char sbit sda=P1^0; sbit scl=P1^1; uchar a; void delay() { ;; } void start() //开始信号 { sda=1; delay(); scl=1; delay(); sda=0; delay(); } void stop() //停止 { sda=0; delay(); scl=1; delay(); sda=1; delay(); } void respons() //应答 { uchar i; sc