void Clear();
void Delay(unsigned int t);
void Write_com(unsigned char d);
void Write_data(unsigned char d);
unsigned char Read_data();
void Disp_char(unsigned char pos,unsigned char dat);
void Disp_word0(unsigned char posx,unsigned char *p,unsigned char n);
void Lcd_system(void);
bit hw_yima();
void delay0(unsigned int t);
void Disp_control(unsigned char zm);
void Disp_number(unsigned char pos,unsigned int dat);
void Report(unsigned char sl);
void Rec_bus(unsigned char rec);
void Disp_pucture(unsigned char *p);
void bus_contorl();
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