//----------------------------------------------------------------------------------//LCD1602字符液晶滾動(dòng)演示程序//----------------------------------------------------------------------------------#include<reg51.h>#include<string.h>#defineucharunsignedchar#defineuintunsignedintvoidInitialize_LCD();voidShowString(uchar,uchar,uchar*);sbitK1=P3^0;sbitK2=P3^1;sbitK3=P3^2;ucharcodePrompt[]="PRESSK1-K4TOSTARTDEMOPROG";//待滾動(dòng)顯示的信息段落，每行不超過80個(gè)支符，共6行ucharconstLine_Count=6;ucharcodeMsg[][80]={ "ManyCADusersdismissschematiccaptureasanecessaryevilinthe", "processofcreatingPCBlayoutbutwehavealwaysdisputedthispoint", "ofview.WithPCBlayoutnowofferingautomationofbothcomponent", "placementandtrackrouting,gettingthedesignintothecomputer", "canoftenbethemosttimeconsumingelementoftheexercise.", "andifyouusecircuitsimulationtodevelopyourideas,", "youaregoingtospendevenmoretimeworkingontheschematic."};//顯示緩沖（2）行 ucharDisp_Buffer[32];//----------------------------------------------------------------------------------//延時(shí)//----------------------------------------------------------------------------------voidDelayxms(uintx){ uchari; while(x--)for(i=0;i<120;i++);}//----------------------------------------------------------------------------------//垂直滾動(dòng)顯示//---------------------------------------------------------------------------------- voidV_Scroll_Display(){ uchari,j,k=0; uchar*p=Msg[0]; uchar*q=Msg[Line_Count]+strlen(Msg[Line_Count]); //以下僅使用顯示緩存的前16個(gè)節(jié)空間 while(p<q) { for(i=0;i<16&&p<q;i++) { //消除顯示緩沖中待顯示行首尾可能出現(xiàn)的空格 if((i==0||i==15)&&*p=='')p++; if(*p!='\0') { Disp_Buffer[i]=*p++; } else { if(++k>Line_Count)break; //p指向下一串的首地址 p=Msg[k]; Disp_Buffer[i]=*p++; } } //不足16個(gè)字符時(shí)用空格補(bǔ)充 for(j=i;j<16;j++)Disp_Buffer[j]=''; //垂直滾動(dòng)顯示 while(F0)Delayxms(5); ShowString(0,0,""); Delayxms(150); while(F0)Delayxms(5); ShowString(0,1,Disp_Buffer); Delayxms(150); while(F0)Delayxms(5); ShowString(0,0,Disp_Buffer);ShowString(0,1,""); Delayxms(150); } //最后清屏 ShowString(0,0,""); ShowString(0,1,"");}//-------------------------------------------------------------------//水平滾動(dòng)顯示//-------------------------------------------------------------------voidH_Scroll_Display(){ uchari,j,k=0,L=0; uchar*p=Msg[0]; uchar*q=Msg[Line_Count]+strlen(Msg[Line_Count]); //將32個(gè)字符的顯示緩沖中前16個(gè)字符設(shè)為空格 for(i=0;i<16;i++)Disp_Buffer[i]=''; while(p<q) { //忽略緩沖中首尾可能出現(xiàn)的空格 if((i=16||i==31)&&*p=='')p++; for(i=16;i<32&&p<q;i++) { if(*p!='\0') { Disp_Buffer[i]=*p++; } else { if(++k>Line_Count)break; //p指向下一串的首地址 p=Msg[k]; Disp_Buffer[i]=*p++; } } //不足32個(gè)字符時(shí)用空格補(bǔ)充 for(j=i;j<32;j++)Disp_Buffer[j]=''; //水平滾動(dòng)顯示 for(i=0;i<=16;i++) { while(F0)Delayxms(5); ShowString(0,L,Disp_Buffer+i); while(F0)Delayxms(5); Delayxms(20); } L=(L==0)?1:0;//行號(hào)在0，1間交替 Delayxms(200); } //如果顯示結(jié)束時(shí)停留在第0行，則清除第一行的內(nèi)容 if(L==1)ShowString(0,1,"");}//---------------------------------------------------------------------//外部中斷0，由K3控制暫停與繼續(xù)顯示//---------------------------------------------------------------------voidEX_INT0()interrupt0{ //暫停與繼續(xù)顯示控制標(biāo)志位 F0=!F0;}//--------------------------------------------------------------------//主程序//--------------------------------------------------------------------voidmain(){ uintCount=0; IE=0x81; //允許外部中斷0 IT0=1 ; //下降沿觸發(fā) F0=0; //暫停顯示與繼續(xù)顯示控制標(biāo)志位 Initialize_