LCD滚动显示
2019-11-08 19:40:09
供稿：网友
/*----------------------------------------------- 名称：LCD1602 内容：通过标准程序移屏滚动显示字符 引脚定义如下：1-VSS 2-VDD 3-V0 4-RS 5-R/W 6-E 7-14 DB0-DB7 15-BLA 16-BLK------------------------------------------------*/#include<reg52.h> //包含头文件，一般情况不需要改动，头文件包含特殊功能寄存器的定义#include<intrins.h>sbit RS = P2^4; //定义端口 sbit RW = P2^5;sbit EN = P2^6;#define RS_CLR RS=0 #define RS_SET RS=1#define RW_CLR RW=0 #define RW_SET RW=1 #define EN_CLR EN=0#define EN_SET EN=1#define DataPort P0/*------------------------------------------------ uS延时函数，含有输入参数 unsigned char t，无返回值 unsigned char 是定义无符号字符变量，其值的范围是 0~255 这里使用晶振12M，精确延时请使用汇编,大致延时 长度如下 T=tx2+5 uS ------------------------------------------------*/void DelayUs2x(unsigned char t){ while(--t);}/*------------------------------------------------ mS延时函数，含有输入参数 unsigned char t，无返回值 unsigned char 是定义无符号字符变量，其值的范围是 0~255 这里使用晶振12M，精确延时请使用汇编------------------------------------------------*/void DelayMs(unsigned char t){ while(t--) { //大致延时1mS DelayUs2x(245); DelayUs2x(245); }}/*------------------------------------------------ 判忙函数------------------------------------------------*/ bit LCD_Check_Busy(void) { DataPort= 0xFF; RS_CLR; RW_SET; EN_CLR; _nop_(); EN_SET; return (bit)(DataPort & 0x80); }/*------------------------------------------------ 写入命令函数------------------------------------------------*/ void LCD_Write_Com(unsigned char com) { // while(LCD_Check_Busy()); //忙则等待 DelayMs(5); RS_CLR; RW_CLR; EN_SET; DataPort= com; _nop_(); EN_CLR; }/*------------------------------------------------ 写入数据函数------------------------------------------------*/ void LCD_Write_Data(unsigned char Data) { //while(LCD_Check_Busy()); //忙则等待 DelayMs(5); RS_SET; RW_CLR; EN_SET; DataPort= Data; _nop_(); EN_CLR; }/*------------------------------------------------ 清屏函数------------------------------------------------*/ void LCD_Clear(void) { LCD_Write_Com(0x01); DelayMs(5); }/*------------------------------------------------ 写入字符串函数------------------------------------------------*/ void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s) { if (y == 0) { LCD_Write_Com(0x80 + x); //表示第一行 } else { LCD_Write_Com(0xC0 + x); //表示第二行 } while (*s) { LCD_Write_Data( *s); s ++; } }/*------------------------------------------------ 写入字符函数------------------------------------------------*/ void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data) { if (y == 0) { LCD_Write_Com(0x80 + x); } else { LCD_Write_Com(0xC0 + x); } LCD_Write_Data( Data); }/*------------------------------------------------ 初始化函数------------------------------------------------*/ void LCD_Init(void) { LCD_Write_Com(0x38); /*显示模式设置*/ DelayMs(5); LCD_Write_Com(0x38); DelayMs(5); LCD_Write_Com(0x38); DelayMs(5); LCD_Write_Com(0x38); LCD_Write_Com(0x08); /*显示关闭*/ LCD_Write_Com(0x01); /*显示清屏*/ LCD_Write_Com(0x06); /*显示光标移动设置*/ DelayMs(5); LCD_Write_Com(0x0C); /*显示开及光标设置*/ }/*------------------------------------------------ 主函数------------------------------------------------*/ void main(void) { LCD_Init(); LCD_Clear();//清屏 LCD_Write_String(6,0,"Fate"); // LCD_Write_Char(8,0,'k'); LCD_Write_String(1,1,"Saber.Arecher.Lancher.Basaka.");while (1) { DelayMs(200); LCD_Write_Com(0x18);//左平移画面 0x1C 是右平移 }}
