单片机LED和数字温度计.doc

设置键按下？初始化主程序开始进入调节子程序YN设置完成显示当前温度是否在温度范围内？N报警Y调节子程序按键扫描设置键是否是2？设置键是否是3？设置键是否是1？ NN调节上限N返回主程序显示当前温度值调节下限Y开始初始化定时器.LED及DS1302.开中断显示学号后六位 4键是否按下 日期模式时间模式 NY1键是否按下？1键是否按下？ 读取当前时间.日期NN Y调节日期子程序调节时间子程序 显示日期，时间读取DS1302调节的日期值读取DS1302调节的时间值分秒是否都为0？整点报时 N Y重设初值中断扫描键值，并读取时钟值，刷新显示中断返回 N 中断程序 时间子程序入口日期写入DS1302 2或3按键加减秒闪烁秒调节 1按键2或 3按键加减分调节分闪烁 1按键2或 3按键加减时调节时闪烁进入主程序 1按键日期子程序入口2或 3按键加减日期写入DS1302日调节日闪烁 1按键2或 3按键加减月调节月闪烁 1按键2或 3按键加减年调节年闪烁进入主程序 1按键#include#define uchar unsigned char#define uint unsigned intsbit beep = P37 ;sbit RST = P34 ;sbit SCK = P35 ;sbit io = P36 ; sbit key1 = P10 ;sbit key2 = P11 ;sbit key3 = P12 ;sbit key4 = P13 ;uchar i,j,mod,flag ;uchar code LED10 =0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,;uchar disbuf8 = 0x62,0xa2,0xf7,0x7a,0x28,0xf7,0x7e,0x7e ;struct time uchar second ; uchar minute ; uchar hour ; uchar day ; uchar month ; uchar year ;current_time ;#define ctime current_time /延时程序：void delay(int n)unsigned int i,j;for(i=0;in;i+)for(j=0;j121;j+);/滴一声，用来按键伴音void di() uchar i ; for(i=0;i0; i-) di(); delay(140); /DS1302的写驱动，传入参数为一个地址和数据void write(uchar addr,uchar dat) uchar i ; RST = 0 ; SCK = 0 ; RST = 1 ; for(i=0;i=1 ; SCK = 1 ; for(i=0;i= 1 ; SCK = 1 ; RST = 0 ;/DS1302的读驱动，传入参数为一个地址，返回参数为读到的数据uchar read(uchar addr) uchar i,dat ; RST = 0 ; SCK = 0 ; RST = 1 ; for(i=0;i=1 ; SCK = 1 ; for(i=0;i=1 ; if(io) dat|=0x80 ; SCK=1 ; RST=0 ; dat=(dat/16*10)+(dat&0x0f); return dat ;/读取DS1302的时间和日期void read_time() ctime.second = read(0x81); ctime.minute = read(0x83); ctime.hour = read(0x85); ctime.day = read(0x87); ctime.month = read(0x89); ctime.year = read(0x8d);/设定时间和日期void set_time() if(!flag) write(0x8e,0x00); write(0x80,(ctime.second/10)4|(ctime.second%10); write(0x82,(ctime.minute/10)4|(ctime.minute%10); write(0x84,(ctime.hour/10)4|(ctime.hour%10); write(0x8e,0x80); else write(0x8e,0x00); write(0x86,(ctime.day/10)4|(ctime.day%10); write(0x88,(ctime.month/10)4|(ctime.month%10); write(0x8c,(ctime.year/10)4|(ctime.year%10); write(0x8e,0x80); /刷新显示时间日期缓冲区void display() switch(flag) uint a=1; case 1 : disbuf0 = LEDctime.day%10;delay(a); disbuf1 = LEDctime.day/10;delay(a); disbuf3 = LEDctime.month%10;delay(a); disbuf4 = LEDctime.month/10;delay(a); disbuf6 = LEDctime.year%10;delay(a); disbuf7 = LEDctime.year/10;delay(a); break ; default : disbuf0 = LEDctime.second%10;delay(a); disbuf1 = LEDctime.second/10;delay(a); disbuf3 = LEDctime.minute%10;delay(a); disbuf4 = LEDctime.minute/10;delay(a); disbuf6 = LEDctime.hour%10;delay(a); disbuf7 = LEDctime.hour/10;delay(a); /显示学号void show() uint m;for(m=0;mi); P0=disbufi; i+;/3msx8x20，大约480ms从DS1302芯片读取一下时间 if(j=20) j=0 ; display(); if(mod=0) read_time(); /DS18B20 的读写程序,数据脚P2.7 /温度传感器18B20 汇编程序,采用器件默认的12 位转化/最大转化时间750 微秒,显示温度-55 到+125 度,显示精度/为0.1 度，显示采用4 位LED 共阳显示测温值/P0 口为段码输入,P20P23为位选/*/#include reg52.h#include stdlib.h#include intrins.h#include intrins.h /_nop_();延时函数用#define dm P0 /段码输出口#define uchar unsigned char#define uint unsigned intsbit DQ=P25; /温度输入口sbit w0=P23; /数码管4sbit w1=P22; /数码管3sbit w2=P21; /数码管2sbit w3=P20; /数码管1sbit beep=P17; /蜂鸣器和指示灯sbit set=P10; /温度设置切换键sbit add=P11; /温度加sbit dec=P12; /温度减int temp1=0; /显示当前温度和设置温度的标志位为0 时显示当前温度uint h;uint temp;uchar r;uchar high=40,low=15,high1;uchar sign;uchar q=0;uchar tt=0;uchar scale;/*温度小数部分用查表法*/uchar code ditab16=0x00,0x01,0x01,0x02,0x03,0x03,0x04,0x04,0x05,0x06,0x06,0x07,0x08,0x08,0x09,0x09;/小数断码表uchar code table_dm12=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x00,0x40;uchar code duanmaya=0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff,0x40;/共阳LED 段码表0 1 2 3 4 5 6 7 8 9 不亮 -uchar table_dm1=0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef; /个位带小数点的断码表uchar data temp_data2=0x00,0x00; /读出温度暂放uchar data display5=0x00,0x00,0x00,0x00,0x00; /显示单元数据，共4 个数据和一个运算暂用void delay(uint t)for (;t0;t-);void scan()int j;for(j=0;j0;i-)DQ=1;_nop_();_nop_(); /从高拉倒低DQ=0;_nop_();_nop_();_nop_();_nop_(); /5 usDQ=val&0x01; /最低位移出delay(6); /66 usval=val/2; /右移1 位DQ=1;delay(1);/*DS18B20 读1 字节函数*/从总线上取1 个字节uchar read_byte(void)uchar i;uchar value=0;for(i=8;i0;i-)DQ=1;_nop_();_nop_();value=1;DQ=0;_nop_();_nop_();_nop_();_nop_(); /4 usDQ=1;_nop_();_nop_();_nop_();_nop_(); /4 usif(DQ)value|=0x80;delay(6); /66 usDQ=1;return(value);/*读出温度函数*/read_temp()ow_reset(); /总线复位delay(200);write_byte(0xcc); /发命令write_byte(0x44); /发转换命令ow_reset();delay(1);write_byte(0xcc); /发命令write_byte(0xbe);temp_data0=read_byte(); /读温度值的第字节temp_data1=read_byte(); /读温度值的高字节temp=temp_data1;temp6348) / 温度值正负判断tem=65536-tem;n=1; / 负温度求补码,标志位置1display4=tem&0x0f; / 取小数部分的值display0=ditabdisplay4; / 存入小数部分显示值display4=tem4; / 取中间八位,即整数部分的值display3=display4/100; / 取百位数据暂存display1=display4%100; / 取后两位数据暂存display2=display1/10; / 取十位数据暂存display1=display1%10; /个位数据r=display1+display2*10+display3*100;/符号位显示判断/if(!display3)display3=0x0a; /最高位为0 时不显示if(!display2)display2=0x0a; /次高位为0 时不显示if(n)display3=0x0b; /负温度时最高位显示-void BEEP()if(r=high&r129)|r128)horl=256-horl;n=1;display3=horl/100;display3=display3&0x0f;display2=horl%100/10;display1=horl%10;display0=0;if(!display3)display3=0x0a; /最高位为0 时不显示if(!display2)display2=0x0a; /次高位为0 时不显示if(n)display3=0x0b; /负温度时最高位显示-/*按键查询程序*/void keyscan()int temp1; /最高温度和最低温度标志位if(set=0)while(1)delay(500);/消抖if(set=0)temp1+;while(!set)scan();if(temp1=1)xianshi(high);scan();if(add=0)while(!add)scan();high+=1;if(dec=0)while(!dec)scan();high-=1;if(temp1=2)xianshi(low);if(add=0)while(!add)scan();low+=1;if(dec=0)while(!dec)scan();low-=1;scan();if(temp1=3)temp1=0;break;/