救救孩子吧,为啥lcd不亮啊 代码:#include<reg51.h> unsigned char code table[]="GOOD LUCK"; unsigned char code tablel[]="1234567"; unsigned char num ; sbit e =P3^2;// input enable sbit rw =P3^1;// H - read : L - write sbit rs =P3^0;// H = data : L = command void delay (unsigned int z) { unsigned int x,y; for(x=z;x>0;x--) for (y =110;y>0;y--); } void LCD_check_busy() { do { rs=0; rw=1; P1=0xff; e=1; delay(1); e=0; } while(P1^7==1); } void wr_lcd_comm(char content) { LCD_check_busy(); rs=0; rw=0; P1=content; e=1; delay(1); e=0; } void wr_lcd_dat(char con