IIC 仿真分析.zip

#include <REGX52.H> #include "fault_scan.h" #include "AT24C04.H" #include "LCD1602.H" #include "common.h" uchar keyValue,key_state; KeyStruct KeyNum; uchar address_save=0; uchar get_keyvalue() { uchar keyValue=0xff; keyValue&=~((!(uchar)key0)<<0);//0xfe; keyValue&=~((!(uchar)key1)<<1);//0xfd; keyValue&=~((!(uchar)key2)<<2);//0xfb; keyValue&=~((!(uchar)key3)<<3);//0xf7; keyValue&=~((!(uchar)key4)<<4);//0xef; return keyValue; } uchar keyscan(KeyStruct* KeyNum) { unsigned char State=KeyNum->State; unsigned char KeyTemp=KeyNum->Value; keyValue=0; keyValue=get_keyvalue(); switch(State) { case CheckKey: if(keyValue == 0xff) { break; } KeyTemp=keyValue; State=DelayKey; case DelayKey: Delay5ms(); State= KeyTemp==keyValue ? KeyFallEdge:CheckKey; break; case KeyFallEdge: State=KeyDown; break; case KeyDown: State= KeyTemp==keyValue ? KeyDown:KeyRisEdge; break; case KeyRisEdge: State=CheckKey; break; } KeyNum->State=State; KeyNum->Value=keyValue; return State; } void key_process() { if(key_state==KeyFallEdge) { switch (keyValue) { uchar temp,i,table[3]; //模块 时间 类型 case 0xfe://故障1 write_add(address_save++,1,0); write_add(address_save++,200,0); write_add(address_save++,36,0); write_add(200,address_save-1,0); ShowString(6,0,"YES!",4); break; case 0xfd://故障2 temp=read_add(200,0); for(i=0;i<3;i++) { table[i]=read_add(temp--,0); } ShowString(5,1,"NICE!",5); break; case 0xfb://故障3 break; case 0xf7://故障4 break; case 0xef://查询故障 +1 break; default: break; } } } void Delay5ms() //@24.000MHz { unsigned char i, j; i = 117; j = 184; do { while (--j); } while (--i); }