#include "msp430g2553.h" #define uchar unsigned char #define uint unsigned int #define RS_1 P1OUT|=BIT3;//输入数据 #define RS_0 P1OUT&=~BIT3;//输入指令 #define RW_1 P1OUT|=BIT4;//写入指令或者数据 #define RW_0 P1OUT&=~BIT4;//从lcd里面读取数据 #define EN_1 P1OUT|=BIT5;//读取信息 #define EN_0 P1OUT&=~BIT5;//下降沿时候执行指令 #define datt P2OUT; uchar temp=0; uchar table1[]={"hello"}; uchar table2[]={"hello"};
/*................................................. * 延时程序 .................................................. */
void delay(uint i) { uint j; while(--i!=0) { for(j=0;j<255;j++); } }
/*................................................. * 忙信号检查 .................................................. */
uchar chkbusy() { uchar busy; P2OUT=0xf0; EN_0;//读取数据 RS_0;//输入指令 RW_1;//写入指令或者数据 EN_1;//读取信息 busy=P2OUT&0x80; delay(1); EN_0;//下降沿执行指令 return(busy); }
/*................................................. * 写指令 .................................................. */
void writecom(uchar x,uchar comm) { //if(x) while(chkbusy()); EN_0; RS_0; RW_0; EN_1; P2OUT=(comm&0xf0); delay(5); EN_0; delay(5); EN_1; P2OUT=(comm&0x0f)<<4; delay(5); EN_0; }
/*................................................. * 写数据 .................................................. */
void writedata(uchar dat) {
//while(chkbusy()); //检查忙信号 EN_0; RS_1; RW_0; EN_1; P2OUT=(dat&0xf0); //送高四位数据到P2口 delay(5); EN_0; delay(5); EN_1; P2OUT=(dat&0x0f)<<4; //送低四位数据到P2口 delay(5); EN_0; P2OUT=P2OUT|0x0f; //置低四位为1
}
/*................................................. * lcd初始化程序 .................................................. */
void lcdinit() { delay(30); writecom(0,0x02);//数据指针清零 delay(5); writecom(1,0x28);// writecom(1,0x0c);//显示光标开及设置 writecom(1,0x06);//显示光标移动设置 writecom(1,0x01);//显示清屏 delay(10); }
/*................................................. * 在指定位置显示一个字符，x为行，Y为列 .................................................. */
void displayone(uchar x,uchar y,uchar *n) { uchar add; if (x == 1) add=0x80+y; //writecom(1,add); else add=0xc0+y; writecom(1,add); writedata(*n); }
/*................................................. * 显示字符串 .................................................. */
void displayleng(uchar x,uchar y,uchar *s) { y=y&0x0f; while(*s) { displayone(x,y,s); y++; s++; } }
/*................................................. * 主函数 .................................................. */
void main() {
WDTCTL = WDTPW + WDTHOLD; // Stop WDT P2SEL=0x00; P2D = 0xff; P1DIR = 0x38;
lcdinit(); //lcdcls();
P2OUT=0xff;
writecom(1,0x01); //writedata(0x01); while(1) { displayleng(1,0,table1); delay(100); displayleng(2,1,table2); } }
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