1602四線(xiàn)制驅(qū)動(dòng)程序.doc

/* 1602四線(xiàn)制驅(qū)動(dòng)程序-基于MSP430F149 FileName:LCD1602x4_mps.h Author:HuNB */ #include #defineset(x)P6OUT|=x #defineclr(x)P6OUT&=x #definersBIT2/RA1 #definerwBIT3/RA2 #defineeBIT4/RA3 /*- 函數(shù)說(shuō)明 -*/ voidinit();/申明I/O口初始化函數(shù) voiddelay_nus(unsignedintn);/NnS延時(shí)函數(shù) voiddelay_nms(unsignedintn);/NmS延時(shí)函數(shù) voidLCD_init(void);/LCD初始化函數(shù) voidLCD_en_write(void);/LCD寫(xiě)入使能函數(shù) voidLCD_write_command(unsignedcharcommand);/LCD寫(xiě)入命令函數(shù) voidLCD_write_data(unsignedcharRecdata);/LCD寫(xiě)入數(shù)據(jù)函數(shù) voidLCD_set_xy(unsignedcharx,unsignedchary);/LCD設(shè)置顯示位置函數(shù) voidLCD_write_char(unsignedcharX,unsignedcharY,unsignedcharRecdata);/LCD顯示字符函數(shù) intLCD_PutStr(unsignedchar*DData,intpos);/LCD顯示字符串函數(shù) /intLCD_PutNum(unsignedlongnum,intXS,intpos);/LCD顯示數(shù)字函數(shù) intp=0; /- /- /I/O口初始化函數(shù) voidinit() /ADCON1=0X07;/設(shè)置A口為普通I/O口 /TRISA=0X00;/設(shè)置A口為輸出 /TRISD=0X00;/設(shè)置D口為輸出 P4DIR=0xff; P6DIR=0x1c;/設(shè)置A口為輸出 WDTCTL=WDTPW+WDTHOLD;/殺狗 voiddelay_1us(void)/1us延時(shí)函數(shù) _NOP(); voiddelay_nus(unsignedintn)/Nus延時(shí)函數(shù) unsignedinti=0; for(i=0;in;i+) delay_1us(); voiddelay_1ms(void)/1ms延時(shí)函數(shù) unsignedinti; for(i=0;i1140;i+); voiddelay_nms(unsignedintn)/Nms延時(shí)函數(shù) unsignedinti=0; for(i=0;i4;/高四位移到低四位 delay_nus(16); clr(rs);/RS=0選擇指令地址 clr(rw);/RW=0寫(xiě)操作 P4OUT&=0Xf0;/清低四位 P4OUT|=temp&0x0f;/寫(xiě)高四位 /command&0x0f; LCD_en_write(); P4OUT&=0xf0;/清高四位 P4OUT|=command&0x0f;/寫(xiě)低四位 LCD_en_write(); set(rw);/RW=1結(jié)束寫(xiě)操作 voidLCD_write_data(unsignedcharRecdata)/寫(xiě)數(shù)據(jù) unsignedchartemp; temp=Recdata4;/高四位移到低四位 delay_nus(16); set(rs);/RS=1選擇數(shù)據(jù)地址 clr(rw);/RW=0寫(xiě)操作 P4OUT&=0Xf0;/清高四位 P4OUT|=temp&0x0f;/Recdata&0xf0寫(xiě)高四位 LCD_en_write(); /Recdata=Recdata4;/低四位移到高四位 P4OUT&=0Xf0;/清高四位 P4OUT|=Recdata&0x0f;/寫(xiě)低四位 LCD_en_write(); set(rw);/RW=1結(jié)束寫(xiě)操作 voidLCD_set_xy(unsignedcharx,unsignedchary)/寫(xiě)地址函數(shù) unsignedcharaddress; if(y=0)address=0x80+x; elseaddress=0xc0+x; LCD_write_command(address); voidLCD_init(void)/液晶初始化 LCD_write_command(0x28); delay_nus(40); LCD_write_command(0x28); delay_nus(40); LCD_write_command(0x28); delay_nus(40); LCD_en_write(); delay_nus(40); LCD_write_command(0x28);/4位顯示 LCD_write_command(0x0c);/顯示開(kāi) LCD_write_command(0x01);/清屏 delay_nms(5); voidLCD_write_char(unsignedcharX,unsignedcharY,unsignedcharRecdata)/列x=015,行y=0,1 LCD_set_xy(X,Y);/寫(xiě)地址 LCD_write_data(Recdata); intLCD_PutStr(unsignedchar*DData,intpos) unsignedchari; if(pos=-1) LCD_write_command(0x01);/清屏 delay_nms(2); pos=0; while(*DData)!=0) switch(*DData) casen:/如果是n，則換行 if(pos17) for(i=pos;i16;i+) LCD_write_char(i%16,i/16,); pos=16; else for(i=pos;i0)pos-; LCD_write_char(pos%16,pos/16,); break; default: if(*DData)0x20) *DData=; LCD_write_char(pos%16,pos/16,*DData); pos+; break; DData+; return(pos); /*-以下函數(shù)用于輸出數(shù)字- intLCD_PutNum(unsignedlongnum,intXS,intpos)/從右邊數(shù)，保留幾位小數(shù) unsignedlongtmp=0; unsignedcharnumbits=0; if(pos=-1) LCD_write_command(0x01); delay_nms(2); pos=0; if(num=0) LCD_write_char(pos%16,pos/16,0); pos+; else if(num0) LCD_write_char(pos%16,pos/16,-); num*=(-1); pos+; while(num) tmp=tmp*10+(num%10); num=num/10; numbits+; while(tmp) LCD_write_char(pos%16,pos/16,