嵌入式课程设计报告
}
Print(\GotoXY(0,1); Print(\
while(1) {
DS1302_GetTime(&CurrentTime); TimeToStr(&CurrentTime); GotoXY(6,1);
Print(CurrentTime.TimeString); Delay1ms(400); }
3.2 LCD1602程序：
#ifndef LCD_CHAR_1602_2005_4_9 #define LCD_CHAR_1602_2005_4_9
#include
//Port Definitions********************************************************** sbit LcdRs = P2^0; sbit LcdRw = P2^1; sbit LcdEn = P2^2;
sfr DBPort = 0x80; //P0=0x80,P1=0x90,P2=0xA0,P3=0xB0.数据端口
//内部等待函数
************************************************************************** unsigned char LCD_Wait(void) {
LcdRs=0;
LcdRw=1; _nop_(); LcdEn=1; _nop_();
//while(DBPort&0x80);//在用Proteus仿真时，注意用屏蔽此语句，在调用GotoXY()时，会进入死循环，
//可能在写该控制字时，该模块没有返回写入完备命令，即DBPort&0x80==0x80
//实际硬件时打开此语句 LcdEn=0;
return DBPort; }
//向LCD写入命令或数据
- 10 -
嵌入式课程设计报告
************************************************************ #define LCD_COMMAND 0 // Command #define LCD_DATA 1 // Data #define LCD_CLEAR_SCREEN 0x01 // 清屏
#define LCD_HOMING 0x02 // 光标返回原点 void LCD_Write(bit style, unsigned char input) {
LcdEn=0; LcdRs=style;
LcdRw=0; _nop_();
DBPort=input; _nop_();//注意顺序 LcdEn=1; _nop_();//注意顺序 LcdEn=0; _nop_(); LCD_Wait(); }
//设置显示模式************************************************************ #define LCD_SHOW 0x04 //显示开
#define LCD_HIDE 0x00 //显示关
#define LCD_CURSOR 0x02 //显示光标
#define LCD_NO_CURSOR 0x00 //无光标
#define LCD_FLASH 0x01 //光标闪动 #define LCD_NO_FLASH 0x00 //光标不闪动
void LCD_SetDisplay(unsigned char DisplayMode) {
LCD_Write(LCD_COMMAND, 0x08|DisplayMode); }
//设置输入模式************************************************************ #define LCD_AC_UP 0x02
#define LCD_AC_DOWN 0x00 // default
#define LCD_MOVE 0x01 // 画面可平移 #define LCD_NO_MOVE 0x00 //default
void LCD_SetInput(unsigned char InputMode) {
LCD_Write(LCD_COMMAND, 0x04|InputMode); }
//移动光标或屏幕************************************************************
- 11 -
嵌入式课程设计报告
/*
#define LCD_CURSOR 0x02 #define LCD_SCREEN 0x08 #define LCD_LEFT 0x00 #define LCD_RIGHT 0x04
void LCD_Move(unsigned char object, unsigned char direction) {
if(object==LCD_CURSOR)
LCD_Write(LCD_COMMAND,0x10|direction); if(object==LCD_SCREEN)
LCD_Write(LCD_COMMAND,0x18|direction); } */
//初始化LCD************************************************************ void LCD_Initial() {
LcdEn=0;
LCD_Write(LCD_COMMAND,0x38); //8位数据端口,2行显示,5*7点阵 LCD_Write(LCD_COMMAND,0x38);
LCD_SetDisplay(LCD_SHOW|LCD_NO_CURSOR); //开启显示, 无光标 LCD_Write(LCD_COMMAND,LCD_CLEAR_SCREEN); //清屏
LCD_SetInput(LCD_AC_UP|LCD_NO_MOVE); //AC递增, 画面不动 }
//************************************************************************ void GotoXY(unsigned char x, unsigned char y) {
if(y==0)
LCD_Write(LCD_COMMAND,0x80|x); if(y==1)
LCD_Write(LCD_COMMAND,0x80|(x-0x40)); }
void Print(unsigned char *str) {
while(*str!='\\0') {
LCD_Write(LCD_DATA,*str); str++; } } /*
void LCD_LoadChar(unsigned char user[8], unsigned char place) {
unsigned char i;
- 12 -
嵌入式课程设计报告
LCD_Write(LCD_COMMAND,0x40|(place*8)); for(i=0; i<8; i++)
LCD_Write(LCD_DATA,user[i]); } */
//************************************************************************ #endif
3.3 DS1302应用程序：
#ifndef _REAL_TIMER_DS1302_2003_7_21_ #define _REAL_TIMER_DS1302_2003_7_21_
sbit DS1302_CLK = P1^6; //实时时钟时钟线引脚 sbit DS1302_IO = P1^7; //实时时钟数据线引脚 sbit DS1302_RST = P1^5; //实时时钟复位线引脚 sbit ACC0 = ACC^0; sbit ACC7 = ACC^7;
typedef struct __SYSTEMTIME__ {
unsigned char Second; unsigned char Minute; unsigned char Hour; unsigned char Week; unsigned char Day; unsigned char Month; unsigned char Year;
unsigned char DateString[9]; unsigned char TimeString[9]; }SYSTEMTIME; //定义的时间类型
#define AM(X) X
#define PM(X) (X+12) // 转成24小时制 #define DS1302_SECOND 0x80 #define DS1302_MINUTE 0x82 #define DS1302_HOUR 0x84 #define DS1302_WEEK 0x8A #define DS1302_DAY 0x86 #define DS1302_MONTH 0x88 #define DS1302_YEAR 0x8C
#define DS1302_RAM(X) (0xC0+(X)*2) //用于计算 DS1302_RAM 地址的宏
void DS1302InputByte(unsigned char d) //实时时钟写入一字节(内部函数)
- 13 -
嵌入式课程设计报告
{
unsigned char i; ACC = d;
for(i=8; i>0; i--) {
DS1302_IO = ACC0; //相当于汇编中的 RRC DS1302_CLK = 1; DS1302_CLK = 0; ACC = ACC >> 1; } }
unsigned char DS1302OutputByte(void) //实时时钟读取一字节(内部函数) {
unsigned char i; for(i=8; i>0; i--) {
ACC = ACC >>1; //相当于汇编中的 RRC ACC7 = DS1302_IO; DS1302_CLK = 1; DS1302_CLK = 0; }
return(ACC); }
void Write1302(unsigned char ucAddr, unsigned char ucDa) //ucAddr: DS1302地址, ucData: 要写的数据 {
DS1302_RST = 0; DS1302_CLK = 0; DS1302_RST = 1;
DS1302InputByte(ucAddr); // 地址，命令 DS1302InputByte(ucDa); // 写1Byte数据 DS1302_CLK = 1; DS1302_RST = 0; }
unsigned char Read1302(unsigned char ucAddr) //读取DS1302某地址的数据 {
unsigned char ucData; DS1302_RST = 0; DS1302_CLK = 0; DS1302_RST = 1;
DS1302InputByte(ucAddr|0x01); // 地址，命令
- 14 -