1602LCD顯示器的使用
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DB==P0
RD==P2.6
WR==P2.5
指令碼：
清屏：
光標(biāo)歸位:
。。。。。。。。
讀狀態(tài)輸入：RS=L，RW=H，E=H 輸出：DB0～DB7=狀態(tài)字
寫指令輸入：RS=L，RW=L，E=下降沿脈沖，DB0～DB7=指令碼輸出：無
讀數(shù)據(jù)輸入：RS=H，RW=H，E=H 輸出：DB0～DB7=數(shù)據(jù)
寫數(shù)據(jù)輸入：RS=H，RW=L，E=下降沿脈沖，DB0～DB7=數(shù)據(jù)輸出：無
上次寫的驅(qū)動(dòng)：
#include
#include"LCD1602.h"
#include
#include
#include
#include
#include
sbit lcdrs =P3^0;//數(shù)據(jù)/命令選擇端（H/L）
sbit lcdrw =P3^1;//讀/寫選擇端（H/L）
sbit lcden =P3^2;//使能信號(hào)端
char
char
char LCDBuffer[16]={""};
char ctrlStr[7]={".4f"};
void delayms(int xms)
{
int i, j;
for(i=xms;i>0;i--)
for(j=121;j>0;j--);
}
void write_com(char com)//寫命令
{
lcdrs=0;
P0=com;
delayms(1);
lcden=1;
delayms(1);
lcden=0;
}
void write_data(char mydata)////寫數(shù)據(jù)
{
lcdrs=1;
P0=mydata;
delayms(1);
lcden=1;
delayms(1);
lcden=0;
}
void initLCD()//初始化
{
//02,顯示回車：1，數(shù)據(jù)指針清零。
}
void write_position(char position)//字符要顯示在LCD哪個(gè)位置
{
lcdrs=0;
lcdrw=0;
lcden=0;
P0=position;
delayms(1);
lcden=1;
delayms(1);
lcden=0;
}
///功能函數(shù)部分
void displayOneCharacter(char mydata,char position)
{
write_position(position);
write_data(mydata);
}
void loadAndDisplay(bit judge)
{
if(judge==0)
{
displayOneCharacter(LCDBuffer[0],0x80);
displayOneCharacter(LCDBuffer[1],0x81);
displayOneCharacter(LCDBuffer[2],0x82);
displayOneCharacter(LCDBuffer[3],0x83);
displayOneCharacter(LCDBuffer[4],0x84);
displayOneCharacter(LCDBuffer[5],0x85);
displayOneCharacter(LCDBuffer[6],0x86);
displayOneCharacter(LCDBuffer[7],0x87);
displayOneCharacter(LCDBuffer[8],0x88);
displayOneCharacter(LCDBuffer[9],0x89);
displayOneCharacter(LCDBuffer[10],0x8A);
displayOneCharacter(LCDBuffer[11],0x8B);
displayOneCharacter(LCDBuffer[12],0x8C);
displayOneCharacter(LCDBuffer[13],0x8D);
displayOneCharacter(LCDBuffer[14],0x8E);
displayOneCharacter(LCDBuffer[15],0x8F);
}
if(judge==1)
{
displayOneCharacter(LCDBuffer[1],0xC1);
displayOneCharacter(LCDBuffer[2],0xC2);
displayOneCharacter(LCDBuffer[3],0xC3);
displayOneCharacter(LCDBuffer[4],0xC4);
displayOneCharacter(LCDBuffer[5],0xC5);
displayOneCharacter(LCDBuffer[6],0xC6);
displayOneCharacter(LCDBuffer[7],0xC7);
displayOneCharacter(LCDBuffer[8],0xC8);
displayOneCharacter(LCDBuffer[9],0xC9);
displayOneCharacter(LCDBuffer[10],0xCA);
displayOneCharacter(LCDBuffer[11],0xCB);
displayOneCharacter(LCDBuffer[12],0xCC);
displayOneCharacter(LCDBuffer[13],0xCD);
displayOneCharacter(LCDBuffer[14],0xCE);
displayOneCharacter(LCDBuffer[15],0xCF);
}
}
void setCursorPosition(char position) //移動(dòng)光標(biāo)位置
{
write_com(0x02);//光標(biāo)歸位
for(i=0;i write_com(0x14);//右移 } //下面的代碼用于動(dòng)態(tài)顯示字符的，主要的東西在上面 void moveLeftOneStep(void)//左右移動(dòng) { if(cursorPosition==0)//表明要通過翻頁左移 { if(startAddress!=0)//表明還可左移一次 剩下情況沒法移動(dòng) { startAddress--;//確定顯示的結(jié)束位置 if(expressLength-startAddress>=16)//表明顯示滿了 { endAddress=startAddress+15; return; } else//表明后面還有幾個(gè)空要填滿 { endAddress=expressLength-1; } } } else//表明無需翻頁 { cursorPosition--; } } void moveRightOneStep(void) { if(startAddress+cursorPosition==endAddress+1) return; if(cursorPosition==15)//表明要考慮是否進(jìn)行翻頁 { if(startAddress+16 //表明 startAddress+15得到的是LCD最后一位對(duì)應(yīng)express的地址 再加1表示長度 { startAddress++; endAddress=startAddress+15; displayExpress(); } else if(startAddress+16==expressLength)//表明當(dāng)前已是最后一個(gè)字符 { startAddress++; endAddress=startAddress+14;//光標(biāo)處應(yīng)該是空 displayExpress(); } else//表明光標(biāo)處并沒有顯示字符 { return; } } else//表明無需翻頁 { if(cursorPosition==endAddress+1)//已到最后一個(gè)位置，光標(biāo)不能再動(dòng)了 { return; } cursorPosition++; endAddress=expressLength-1; setCursorPosition(cursorPosition); } } void moveLeft(void)//startAddress+cursorPosition是光標(biāo)對(duì)應(yīng)express中的地址 { if(startAddress+cursorPosition==0)//跳轉(zhuǎn)到最后 { if(expressLength>15) { endAddress=expressLength-1; startAddress=endAddress-14; } cursorPosition=endAddress-startAddress+2; } if(startAddress+cursorPosition-1>=0&&express[startAddress+cursorPosition-1]==n)//tan,sin,ln { if(startAddress+cursorPosition-6>=0&&express[startAddress+cursorPosition-6]==a&&express[startAddress+cursorPosition-6+1]==r) //arctan,arcsin…… { moveLeftOneStep(); moveLeftOneStep(); moveLeftOneStep(); moveLeftOneStep(); moveLeftOneStep(); moveLeftOneStep(); } else if(express[startAddress+cursorPosition-2]==l)//表明為ln { moveLeftOneStep(); moveLeftOneStep(); } else //表明為sin或tan { moveLeftOneStep(); moveLeftOneStep(); moveLeftOneStep(); } } else if(startAddress+cursorPosition-1>=0&&startAddress+cursorPosition-1>=0&&express[startAddress+cursorPosition-1]==g)//lg { moveLeftOneStep(); moveLeftOneStep(); } else if(startAddress+cursorPosition-1>=0&&express[startAddress+cursorPosition-1]==s) { if(startAddress+cursorPosition-6>=0&&express[startAddress+cursorPosition-6]==a&&express[startAddress+cursorPosition-6+1]==r) //arctan,arcsin…… { moveLeftOneStep(); moveLeftOneStep(); moveLeftOneStep(); moveLeftOneStep(); moveLeftOneStep(); moveLeftOneStep(); } else { moveLeftOneStep(); moveLeftOneStep(); moveLeftOneStep(); } } else//表明為單個(gè)字符 { moveLeftOneStep(); } } void moveRight(void) { if(endAddress-startAddress+1==cursorPosition)//表明光標(biāo)到了最后 { if(expressLength>15) { endAddress=15; startAddress=0; } cursorPosition=0; } else if(express[startAddress+cursorPosition]==s||express[startAddress+cursorPosition]==t||express[startAddress+cursorPosition]==c)//sin,tan { moveRightOneStep(); moveRightOneStep(); moveRightOneStep(); } else if(express[startAddress+cursorPosition]==a)//arctan,arcsin之類的 { moveRightOneStep(); moveRightOneStep(); moveRightOneStep(); moveRightOneStep(); moveRightOneStep(); moveRightOneStep(); } else if(express[startAddress+cursorPosition]==l)//lg,ln { moveRightOneStep(); moveRightOneStep(); } else//表明為單字符 moveRightOneStep(); } void displayExpress(void)//從startAddress顯示到endAddress { char i; write_position(0x80);//從這里開始顯示 for(i=startAddress;i<=endAddress;i++) { write_data(express[i]); } for(i=endAddress+1;i<16+startAddress;i++)//后面的寫空格 { write_data( ); } } void insertOneAndDisplay(void) { expressLength++; if(cursorPosition>=0&&cursorPosition<15)//表明是在和前面當(dāng)中插入的 { //查看當(dāng)前顯示狀態(tài) if(endAddress-startAddress==15)//表明當(dāng)前已經(jīng)滿顯了 { endAddress--; } else//表明未滿顯 { endAddress++; } cursorPosition++; } else if(cursorPosition==15)//表明光標(biāo)在顯示器第16個(gè)顯示單元處 此時(shí) startAddress得變 { if(endAddress-startAddress==15)//表明當(dāng)前已經(jīng)滿顯未滿顯的情況已在isModifyInput中處理 { startAddress++; endAddress++; } } } void deleteOneAndDisplay(void) { moveExpressForward(cursorPosition+startAddress,1); expressLength--; if(cursorPosition==0) { startAddress--; //確定endAddress的位置 if(expressLength-startAddress>=16)//表明顯示滿了 { endAddress=startAddress+15; } else//表明后面還有幾個(gè)空要填滿 { endAddress=expressLength-1; } } else { cursorPosition--;//光標(biāo)位置要-- if(expressLength-startAddress>=16)//表明顯示滿了 { endAddress=startAddress+15; } else//表明后面還有幾個(gè)空要填滿 { endAddress=expressLength-1; } } } void deleteAndDisplay(void) { if(startAddress==0&&cursorPosition==0)//表明沒法刪除了 { return; } if(express[cursorPosition-1+startAddress]==s)//表明為cos { if(cursorPosition-6+startAddress>=0&&express[cursorPosition-6+startAddress]==a) { deleteOneAndDisplay(); deleteOneAndDisplay(); deleteOneAndDisplay(); deleteOneAndDisplay(); deleteOneAndDisplay(); deleteOneAndDisplay(); } else { deleteOneAndDisplay(); deleteOneAndDisplay(); deleteOneAndDisplay(); } } else if(express[cursorPosition-1+startAddress]==n)//表明為sin tan { if(express[cursorPosition-2+startAddress]==l)//表明為ln { deleteOneAndDisplay(); deleteOneAndDisplay(); } { deleteOneAndDisplay(); deleteOneAndDisplay(); deleteOneAndDisplay(); deleteOneAndDisplay(); deleteOneAndDisplay(); deleteOneAndDisplay(); } else//表明為sin、tan { deleteOneAndDisplay(); deleteOneAndDisplay(); deleteOneAndDisplay(); } } else if(express[cursorPosition-1+startAddress]==g) { deleteOneAndDisplay(); deleteOneAndDisplay(); } else//表明刪除一個(gè) { deleteOneAndDisplay(); } } void displayInputExpress(void)//輸入時(shí)調(diào)用的 { if(keyCode===) { return; } if(cursorPosition==15&&startAddress+1<=100) { startAddress++; endAddress=14+startAddress; return; } else //僅能提供第一次輸入時(shí)的顯示 { endAddress=expressLength-1; cursorPosition++; return; } warning("error 1"); } void displayModifyExpress(void) { if(keyCode===) { return; } if(keyCode==129||keyCode==130||keyCode==131)//表明為三個(gè)字符要輸入 { insertOneAndDisplay(); insertOneAndDisplay(); insertOneAndDisplay(); } else if(keyCode==139||keyCode==140) { insertOneAndDisplay(); insertOneAndDisplay(); } else if(keyCode>=141&&keyCode<=142) { insertOneAndDisplay(); insertOneAndDisplay(); insertOneAndDisplay(); insertOneAndDisplay(); insertOneAndDisplay(); insertOneAndDisplay(); } else { insertOneAndDisplay(); } } void dispaly_dataA(void); void dispaly_dataA(void) { if(dataA>=pow(10,36)) { warning("Answer Over Flow!"); dataA=0; dispaly_dataA(); } else { sprintf(LCDBuffer,"g",dataA); loadAndDisplay(1); } } void warning(char *p) { sprintf(LCDBuffer,"s",p); loadAndDisplay(0); delayms(500); sprintf(LCDBuffer,"s"," ");//清屏 loadAndDisplay(0); displayExpress(); } void moveLogo(void)//把字符向前移動(dòng) { temp=LCDBuffer[0]; for(i=0;i<15;i++) { LCDBuffer[i]= LCDBuffer[i+1];//前移動(dòng) } LCDBuffer[15]=temp; } void showLogo(void) { for(i=0;i<19;i++) { loadAndDisplay(0); moveLogo(); delayms(100); } }
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