void init_lcd_ctl();
void clr_lcd();
int wr_char(unsigned char row,unsigned char colum,
	    unsigned char char1,unsigned char char2,unsigned char att);
//row=0 - 3 , 4 lines characters
//colum=0 - 15 , 16 ASCII characters each line
//char1=0 - 0xff , ASCII , only at char2<0xa1
//or char1=0xa1 -0xf8 Hanzi left code
//char2=0xa1 - 0xff Hanzi right code
//att=0 light background , =1 black background