單片機(jī)原理及應(yīng)用實(shí)驗(yàn)(四)

1、 圖形液晶顯示實(shí)驗(yàn)一、實(shí)驗(yàn)?zāi)康?、掌握LCD12864的基本工作原理；2、掌握LCD12864顯示漢字和圖形的編程方法。二、實(shí)驗(yàn)設(shè)備PC機(jī) 一臺 定時中斷綜合實(shí)驗(yàn)三、實(shí)驗(yàn)內(nèi)容設(shè)計一個單片機(jī)控制系統(tǒng)，要求利用LCD12864(LGM12641BS1R)連續(xù)滾動顯示學(xué)號和姓名。用proteus仿真軟件繪制電路原理圖，通過Keil C51建立工程項目編寫出控制程序，并通過proteus軟件觀察程序運(yùn)行效果。 LCD12864顯示接口電路圖LCD12864工作原理LCD12864工作原理LCD12864工作原理幾個重要指令由此可見，其顯示的起始行為0 xC0,有規(guī)律的改變起始行號，可以實(shí)現(xiàn)滾屏的效果起

2、始頁為0 xB8顯示的RAM共64行，分為8頁，每頁8行LCD12864工作原理幾個重要指令第一列為0 x40一直到0 x7F共64列，因此此液晶有128列，所以有兩塊驅(qū)動芯片驅(qū)動。Busy:為1內(nèi)部忙，不能對液晶進(jìn)行操作。0-工作正常。ON/OFF:1-顯示關(guān)閉；0-顯示打開；RESET:1-復(fù)位狀態(tài)；0-正常；在Busy和RESET狀態(tài)時，除讀狀態(tài)指令外其他任何指令均不會對驅(qū)動器產(chǎn)生作用。LCD12864工作原理LCD12864工作原理程序結(jié)構(gòu)void lcd_busy(void)P0=0 x00;p_di=0; p_rw=1;p_e=1;while(P0 & 0 x80);p_e=0;L

3、CD12864工作原理程序結(jié)構(gòu)/寫指令到LCMvoid wcode(uchar c,uchar csl,uchar csr) p_csl=csl; p_csr=csr; lcd_busy(); p_di=0; p_rw=0; P0=c;/將變量C賦予LCM p_e=1; p_e=0;程序結(jié)構(gòu)/寫數(shù)據(jù)到LCM子函數(shù)void wdata(uchar c,uchar csl,uchar csr) p_csl=csl; p_csr=csr; lcd_busy(); p_di=1; p_rw=0; P0=c;/將變量C賦予LCM p_e=1; p_e=0;程序結(jié)構(gòu)/設(shè)定起始行void set_start

4、line(uchar i) i=0 xc0+i; wcode(i,1,1);/定位X方向，Y方向void set_xy(uchar x,uchar y) x=x+0 x40; y=y+0 xb8; wcode(x,1,1); wcode(y,1,1);程序結(jié)構(gòu)/屏幕開啟、關(guān)閉void dison_off(uchar o) o=o+0 x3e; /o為1為開，為0是關(guān) wcode(o,1,1);/復(fù)位子函數(shù)void reset() p_rst=0; delay(20); p_rst=1; delay(20);程序結(jié)構(gòu)/LCM初始化void lcd_init(void) uchar x,y; re

5、set(); dison_off(0); for(y=0;y8;y+) for(x=0;x=64) set_xy(x-64,y); wdata(dd,0,1); else set_xy(x,y); wdata(dd,1,0); 程序結(jié)構(gòu)void disp_Hz(uchar xx,uchar yy,uchar n,uchar fb)/xx為該行第xx個字，共8字，yy為第幾行，共8行。uchar i,dx; for(i=0;i16;i+) dx=HZ2*i+n*32; /2*i為選擇偶數(shù)行，因其為列掃描 if(fb) dx=255-dx;/反白顯示lw(xx*16+i,yy,dx);dx=HZ(

6、2*i+1)+n*32;if(fb) dx=255-dx;lw(xx*16+i,yy+1,dx); 程序結(jié)構(gòu)void disp_Ez(uchar xx,uchar yy,uchar n,uchar fb)/顯示數(shù)字或英語 uchar i,dx; for(i=0;i8;i+) dx=Ez2*i+n*16; if(fb) dx=255-dx;lw(xx*8+i,yy,dx);/ dx=Ez(2*i+1)+n*16;if(fb) dx=255-dx;lw(xx*8+i,yy+1,dx); 程序結(jié)構(gòu)uchar code HZ=0 x10,0 x40,0 x10,0 x40,0 x14,0 x50,0

7、xD4,0 x57,0 x54,0 x55,0 x54,0 x55,0 x54,0 x55,0 xFC,0 x7F,0 x52,0 x55,0 x52,0 x55,0 x52,0 x55,0 xD3,0 x57,0 x12,0 x50,0 x10,0 x40,0 x10,0 x40,0 x00,0 x00,/*重,0 */0 x00,0 x40,0 x00,0 x30,0 xFC,0 x0F,0 x04,0 x80,0 x84,0 x40,0 x84,0 x20,0 x84,0 x18,0 x85,0 x06,0 xF6,0 x01,0 x84,0 x06,0 x84,0 x18,0 x84,

8、0 x20,0 x84,0 x40,0 x84,0 x80,0 x04,0 x80,0 x00,0 x00,/*慶,1 */0 x04,0 x20,0 x84,0 x60,0 x84,0 x20,0 xFC,0 x1F,0 x84,0 x10,0 x84,0 x10,0 x00,0 x40,0 xFE,0 x44,0 x92,0 x44,0 x92,0 x44,0 xFE,0 x7F,0 x92,0 x44,0 x92,0 x44,0 xFE,0 x44,0 x00,0 x40,0 x00,0 x00,/*理,2 */程序結(jié)構(gòu)0 x00,0 x20,0 x04,0 x20,0 x04,0 x2

9、0,0 x04,0 x20,0 x04,0 x20,0 x04,0 x20,0 x04,0 x20,0 xFC,0 x3F,0 x04,0 x20,0 x04,0 x20,0 x04,0 x20,0 x04,0 x20,0 x04,0 x20,0 x04,0 x20,0 x00,0 x20,0 x00,0 x00,/*工,3 */0 x20,0 x80,0 x20,0 x80,0 x20,0 x40,0 x20,0 x20,0 x20,0 x10,0 x20,0 x0C,0 x20,0 x03,0 xFF,0 x00,0 x20,0 x03,0 x20,0 x0C,0 x20,0 x10,0 x20,0 x20,0 x20,0 x40,0 x20,0 x80,0 x20,0 x80,0 x00,0 x00,/*大,4 */0 x40,0 x04,0 x30,0 x04,0 x11,0 x04,0 x96,0 x04,0 x90,0 x04,0 x90,0 x44,0 x91,0 x84,0 x96,0 x7E,0 x90,0 x06,0 x90