为什么液晶初始化一定要读一次索引寄存器呢？

jzlis0202

看过不少的液晶初始化代码，都是用读取液晶的id的方式来初始化的，那样做是因为并不知道液晶的驱动id，在我已经知道液晶id的情况下初始化，为什么还要再读一次索引寄存器才能初始化呢，如下那个LCD_ReadReg(0x0000);去掉初始化就不能

    LCD_Init();

  //Delay(5); /* delay 50 ms */

  //LCD_WriteReg(0x0000,0x0001);  

  //Delay(5); /* delay 50 ms */ //start internal osc

  //LCD_DB_AS_InPut();

  //Delay(1); /* delay 50 ms */ //start internal osc

  //DeviceIdCode = LCD_ReadReg(0x0000);

  LCD_ReadReg(0x0000);

  //LCD_DB_AS_OutPut();

 // Delay(1); /* delay 50 ms */ //start internal osc

  
        LCD_WriteReg(0x0000,0x0000); 

LCD_WriteReg(0x0001,0x0100);     

        LCD_WriteReg(0x0002,0x0700); //power on sequence                     

        LCD_WriteReg(0x0003,0x1020 ); //65K (1<<12)|(1<<5)|(1<<4)

        LCD_WriteReg(0x0004,0x0000);                                   

        LCD_WriteReg(0x0008,0x0202);           

        LCD_WriteReg(0x0009,0x0000);         

        LCD_WriteReg(0x000a,0x0000); //display setting         

        LCD_WriteReg(0x000c,0x0000); //display setting          

        LCD_WriteReg(0x000d,0x0000); //0f3c          

        LCD_WriteReg(0x000f,0x0000);

        LCD_WriteReg(0x0007,0x0000);

        //Power On sequence //

        LCD_WriteReg(0x0010,0x12b0);   

        LCD_WriteReg(0x0011,0x0007);

        LCD_WriteReg(0x0012,0x01bb);                                                                 

        LCD_WriteReg(0x0013,0x1c00);

LCD_WriteReg(0x0017,0x0001); 

        LCD_WriteReg(0x0029,0x0009);

        LCD_WriteReg(0x002a,0x0009);

LCD_WriteReg(0x00a4,0x0000);

        

LCD_WriteReg(0x0050,0x0000);                                                            

        LCD_WriteReg(0x0051,0x00ef);           

        LCD_WriteReg(0x0052,0x0000);   

LCD_WriteReg(0x0053,0x013f);

        LCD_WriteReg(0x0060,0x2700);

        LCD_WriteReg(0x0061,0x0001); 

        LCD_WriteReg(0x006a,0x0000);

        LCD_WriteReg(0x0080,0x0000);

        LCD_WriteReg(0x0081,0x0000);

        LCD_WriteReg(0x0082,0x0000);

        LCD_WriteReg(0x0083,0x0000);

        LCD_WriteReg(0x0084,0x0000);

        LCD_WriteReg(0x0085,0x0000);

        LCD_WriteReg(0x0090,0x0010);     

        LCD_WriteReg(0x0092,0x0000);  

        LCD_WriteReg(0x0093,0x0003);

        LCD_WriteReg(0x0095,0x0110);

LCD_WriteReg(0x0097,0x0000);    

LCD_WriteReg(0x0098,0x0000);

        LCD_WriteReg(0x0007,0x0173);

LCD_WriteReg(0x0020,0x0000);

        LCD_WriteReg(0x0021,0x0000);

正点原子

其他地方用到了这个device id吧！你去掉，就没有了，没有的话，其他地方就不知道怎么处理了。。。