新手入门之源代码lcd12864

1、/*LCD12864 文字显示(c) Copyright 2009-2010, DEMOK s*V1.1.0*/#include /* common defines and macros */#include /* derivative information */#pragma LINK_INFO DERIVATIVE mc9s12dg128b#define uunsigned#define uchar unsigned char#define x1#define x2#define y0 x800 x880 x80#define comm0#define dat1#define#defin

2、e #define #define#definersrw e psbrstPORTA_BIT0PORTA_BIT2 PORTA_BIT4 PORTA_BIT1PORTA_BIT3/H=data;mand;/H=read; L=write;/input enable;/H=并口; L=串口;/Reset Signal 低电平有效#definebusyPORTB_BIT7/lcd busy bitvoid wr_lcd (ucharvoid chk_busy (void);m,uchar content);void delay (uus);uchartab1=理工大学:自动化学院 Golden P

3、alm TECH;/*/LCD 初始化函数/*/*/void init_lcd (void)DDRA=0 xff; rst=1; psb=1;wr_lcd (comm,0 x30);/*30-基本指令动作*/wr_lcd (comm,0 x01);/*清屏，地址指针指向 00H*/ wr_lcd (comm,0 x06);/*光标的移动方向*/wr_lcd (comm,0 x0c);/*开显示，关游标*/*/显示汉字或字符/*/*/void chn_disp (uchar*chn)uchar i,j;wr_lcd (comm,0 x30); wr_lcd (comm,0 x80); for (

4、j=0;j4;j+)for (i=0;i16;i+)wr_lcd (dat,chnj*16+i);/*/清DDRAM 函数/*/*/void clrram (void)wr_lcd (comm,0 x30); wr_lcd (comm,0 x01);/*/LCD 写数据子令函数/*/*/void wr_lcd (ucharchk_busy ();DDRB=0 xff;m,uchar content)if(m)rs=1;rw=0;/data/writeelsers=0; rw=0; e=1;delay(5);mand/writePORTB=content;e=0;/output data or

5、comm/*/检测忙函数/*/*/void chk_busy (void)DDRB=0X00; PORTB=0 xff;rs=0; rw=1; e =1;whiusy=1); e =0;/*/毫秒延时函数/*/*/void delay (uus)/delay timewhile(us-);void delay1 (ums)ui,j;for(i=0;ims;i+)for(j=0;j15;j+)delay(1);/*/主函数/*/*/void main(void)init_lcd(); chn_disp (tab1);/* put your own code here */Enableerrupts