STC8H8K64U——LCD1602

LCD的读写操作

LCD1602的控制命令表

命令 7：CGRAM地址设置
命令格式：04H+地址码，该命令决定自定义字符的存储地址。
命令 8：DDRAM地址设置
命令格式：08H+地址码，该命令决定字符在LCD上的显示位置。
命令 9：读“忙”或状态字
BF = 1：LCD忙，不能接收命令或数据
BF = 0：LCD不忙，可以接收命令或数据

main.c

#include "lcd1602.h"unsigned char code temp1[] = {0x01,0x1F,0x11,0x1F,0x11,0x1F,0x01,0x01,0x00,0x1C,0x04,0x1C,0x04,0x1D,0x01,0x1E,    //电（占两个字符）0x07,0x04,0x04,0x04,0x05,0x04,0x08,0x13,0x1e,0x00,0x10,0x10,0x1C,0x10,0x14,0x1F};   //压（占两个字符）unsigned char Thousand;
unsigned char Hundred;
unsigned char Ten;
unsigned char One;	
unsigned int temp = 8421;void main(void)
{Thousand = temp/1000;   /*千位*/Hundred = temp/100%10;  /*百位*/	Ten = temp/10%10;       /*十位*/	One = temp%10;          /*个位*/
/*定时器T0延时，中断允许*/EA = 1;ET0 = 1;LCD1602_Init();LCD1602_WriteChar(1,0x00,'A'); LCD1602_WriteChar(1,0x01,0x30|Thousand); LCD1602_WriteChar(1,0x02,0x30|Hundred); LCD1602_WriteChar(1,0x03,0x30|Ten); LCD1602_WriteChar(1,0x04,0x30|One); 	LCD1602_WriteString(1,0x05,"Hello Word");
/*存储自定义字符*/	LCD1602_W(0x00,4,temp1);  
/*显示自定义字符*/	LCD1602_WriteChar(2,0x00,0x00); LCD1602_WriteChar(2,0x01,0x01); LCD1602_WriteChar(2,0x02,0x02); LCD1602_WriteChar(2,0x03,0x03); 		while(1);
}

lcd1602.h

#ifndef LCD1602_H
#define LCD1602_H#include <STC8H.H>
#include "delay.h"#define unchar unsigned char
#define unint unsigned int#define BF  0x80  //BF == 1为“忙”#define OUT P0    //数据线sbit RS = P2^6;   //寄存器选择；RS = 1 数据寄存器，RS = 0 命令、状态寄存器 
sbit R_W = P2^5;  //读、写操作选择；R_W = 1 读，R_W = 0 写 
sbit E = P2^7;    //使能信号void GPIO_Init(void);
void LCD1602_Init(void);                				//LCD1602 初始化void LCD1602_WriteCommand(unchar command); 				//写命令	
void LCD1602_WriteData(unchar Data);       			    //写数据	void LCD1602_WriteAddr(unchar x,unchar y); 		        //指定位置,第一行：00H到27H，第二行：40H到67H
void LCD1602_WriteString(unchar x,unchar y,unchar *s);  //指定位置,写入字符串
void LCD1602_WriteChar(unchar x,unchar y,unchar c);     //指定位置,写入字符void LCD1602_CheckBusy(void);              				//检查“忙”
void LCD1602_Write_0x38(void);                          //写命令 0x38/*向CGRAM写入自定义字符（5*8点阵），最多8个字符。先写起始地址：0x00,0x08,0x10,0x18,0x20,0x28,0x30,0x38再写数据表，至少8个数据参数：addr：起始地址n：写多少个字符*s：存储数据的数组 要显示自定义的字符，需访问CGROM，地址0x00~0x07
*/
void LCD1602_W(unchar addr,unchar n,unchar *s);#endif

lcd1602.c

#include "lcd1602.h"void GPIO_Init(void)
{
/*准双向口模式*/	P0M0 = 0x00;P0M1 = 0x00;P2M0 = 0x00;P2M1 = 0x00;	
}void LCD1602_Init(void)     //LCD1602 初始化
{GPIO_Init();LCD1602_Write_0x38();	delay_ms(5);	LCD1602_Write_0x38();	delay_ms(5);	LCD1602_Write_0x38();	delay_ms(5);		LCD1602_WriteCommand(0x38);  //8位数据线，两行显示，5*7点阵LCD1602_WriteCommand(0x01);  //清屏	delay_ms(5);LCD1602_WriteCommand(0x06);  //光标向右移动，AC自动加一LCD1602_WriteCommand(0x0c);  //显示开，光标关，闪烁关  
}void LCD1602_WriteCommand(unchar command) //写命令
{LCD1602_CheckBusy();RS = 0;   //选择命令寄存器R_W = 0;  //写 OUT = command;E = 1;delay_us(1);E = 0;
//	delay_us(50);	
}void LCD1602_WriteData(unchar Data) //写数据
{LCD1602_CheckBusy();RS = 1;  //选择数据寄存器  R_W = 0; //写OUT = Data;	E = 1;delay_us(1);E = 0;
//	delay_us(50);	
}void LCD1602_WriteAddr(unchar x,unchar y)   //指定位置,第一行：00H到27H，第二行：40H到67H
{if(x==1){LCD1602_WriteCommand(y|0x80);}else if(x==2){LCD1602_WriteCommand(y|0x80|0x40);}	
}void LCD1602_WriteChar(unchar x,unchar y,unchar c)     //指定位置,写入字符
{LCD1602_WriteAddr(x, y);LCD1602_WriteData(c); 
}void LCD1602_WriteString(unchar x,unchar y,unchar *s)  //指定位置,写入字符串
{LCD1602_WriteAddr(x, y);while(*s != '\0'){LCD1602_WriteData(*s);s++;}
}void LCD1602_CheckBusy(void) //检查“忙”
{unchar temp;OUT = 0xff;RS = 0;      //选择状态寄存器R_W = 1;     //读do{	E = 1;       temp = OUT; //读取IO口数据}while(temp&BF); //BF == 1为“忙”E = 0;    
}
void LCD1602_Write_0x38(void) 
{	E = 0;RS = 0;   //选择命令寄存器R_W = 0;  //写 OUT = 0x38;E = 1;delay_us(1);E = 0;
}void LCD1602_W(unchar addr,unchar n,unchar *s)
{unsigned char	i;	LCD1602_WriteCommand(0x40|addr);for(i=0;i<(8*n);i++){LCD1602_WriteData(*s);s++;		}	
}