1602-display-distance-.rar_1602 超声波_distance

/*----------------------------------------------- 名称：LCD1602 论坛：www.doflye.net 编写：shifang 日期：2009.5 修改：无 内容： 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 "1602.h" #include "delay.h" #define CHECK_BUSY//是否使用判断忙语句条件，后面使用条件编译 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 /*------------------------------------------------ 判忙函数 ------------------------------------------------*/ bit LCD_Check_Busy(void) { #ifdef CHECK_BUSY DataPort= 0xFF; RS_CLR; RW_SET; EN_CLR; _nop_(); EN_SET; return (bit)(DataPort & 0x80); #else return 0; #endif } /*------------------------------------------------ 写入命令函数 ------------------------------------------------*/ void LCD_Write_Com(unsigned char com) { while(LCD_Check_Busy()); //忙则等待 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 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) { while (*s) { LCD_Write_Char(x,y,*s); s ++; x++; } } /*------------------------------------------------ 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*/ }