|
|
#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
typedef unsigned char U8;
typedef unsigned int U16;
typedef signed char S8;
#define lcddb P0 //1602數(shù)據(jù)總線
sbit lcden=P3^4; //en端
sbit rs=P3^5; //rs端
sbit rw=P3^6; //rw端
//sbit dula=P2^6;
//sbit wela=P2^7;
uchar code table1[]="ch20";
uchar code table2[]=" 0x05mg/m ";
uchar num1; //存儲(chǔ)通道采集的數(shù)據(jù)
void delay(uint x) //延時(shí)函數(shù)
{
uint a,b;
for(a=x;a>0;a--)
for(b=114;b>0;b--);
}
void delay1(uint x)
{
uint a,b;
for(a=x;a>0;a--)
for(b=100;b>0;b--);
}
void read_busy()
{
uchar busy;
lcddb = 0xff; //復(fù)位數(shù)據(jù)總線
rs = 0; //拉低rs
rw = 1; //拉高rw
do
{
lcden = 1; //使能en
busy = lcddb; //讀回?cái)?shù)據(jù)
lcden = 0; //拉低使能以便于下次產(chǎn)生上升沿
}
while(busy & 0x80); //判斷狀態(tài)字bit7位是否為1，為1側(cè)表示忙，程序等待
}
void write_com(uchar com) //向1602寫指令
{
// read_busy(); //判斷忙，忙則
P0 = com;
rs = 0;
rw = 0;
lcddb = com;
lcden = 0;
delay(10);
lcden = 1;
delay(10);
lcden = 0;
}
void write_date(uchar date) //向1602寫數(shù)據(jù)
{
P0=date;
rs=1;
lcden=0;
delay(10);
lcden=1;
delay(10);
lcden=0;
}
void init() //lcd初始化
{
rw=0;
write_com(0x38); //顯示模式設(shè)置：16×2顯示，5×7點(diǎn)陣，8位數(shù)據(jù)接口
delay(20);
write_com(0x0f); //顯示模式設(shè)置
delay(20);
write_com(0x06); //顯示模式設(shè)置：光標(biāo)右移，字符不移
delay(20);
write_com(0x01); //清屏幕指令，將以前的顯示內(nèi)容清除
delay(20);
}
void main()
{
uchar a;
init();
write_com(0x80); //將第一個(gè)字符寫在向右偏移17個(gè)字符處，為后面的由右向左劃入做準(zhǔn)備。
delay(20);
for(a=0;a<14;a++)
{
write_date(table1[a]); //向1602寫入第一個(gè)數(shù)據(jù)
delay(20);
}
write_com(0xc0);
delay(50);
for(a=0;a<14;a++)
{
write_date(table2[a]); //向1602寫入第二個(gè)數(shù)據(jù)
delay(40);
}
while(1);
} |
|
QQ好友和群
QQ空間
騰訊微博
騰訊朋友
收藏
淘帖
頂
踩
