DS1802HE LCD1602实现万年历和温度显示(不用时间芯片).doc

#include#include#include #define uchar unsigned char#define uint unsigned intuchar code table=-Figo;/uchar code table1=WWW.TXMCU.COM;sbit lcden=P34;sbit lcdrs=P35;sbit dula=P26;sbit wela=P27; sbit ds=P17;sbit key1=P10; sbit key2=P11; sbit key3=P12; sbit key4=P13; int tempValue; int s_1=1000;unsigned char FunKeyFlag=6,keypress; #define key_vaule1 0x01 #define key_vaule2 0x02 #define key_vaule3 0x03 #define key_vaule4 0x04uchar num;int ms_10=10;int flag=0;int s_1_1=1000;uint sec=55;uint min=9;uint hour=22;uint nian=2014;uint yue=8;uint ri=20;uint xingqi=3;/延时函数, 对于11.0592MHz时钟, 例i=10,则大概延时10ms.void delay_wendu(unsigned int i) unsigned int j; while(i-) for(j = 0; j 0) i-; ds = 1; /产生一个上升沿, 进入等待应答状态 i = 4; while(i0) i-;void dsWait() unsigned int i; while(ds); while(ds);/检测到应答脉冲 i = 4; while(i 0) i-;/向DS18B20读取一位数据/读一位, 让DS18B20一小周期低电平, 然后两小周期高电平,/之后DS18B20则会输出持续一段时间的一位数据bit readBit() unsigned int i; bit b; ds = 0; i+;/延时约8us, 符合协议要求至少保持1us ds = 1; i+; i+;/延时约16us, 符合协议要求的至少延时15us以上 b = ds; i = 8; while(i0) i-; /延时约64us, 符合读时隙不低于60us要求 return b;/读取一字节数据, 通过调用readBit()来实现unsigned char readByte() unsigned int i; unsigned char j, dat; dat = 0; for(i=0; i8; i+) j = readBit(); /最先读出的是最低位数据 dat = (j 1); return dat;/向DS18B20写入一字节数据void writeByte(unsigned char dat)unsigned int i;unsigned char j;bit b; for(j = 0; j = 1; /写1, 将DQ拉低15us后, 在15us60us内将DQ拉高, 即完成写1 if(b) ds = 0; i+; i+; /拉低约16us, 符号要求1560us内 ds = 1; i = 8; while(i0) i-; /延时约64us, 符合写时隙不低于60us要求 else /写0, 将DQ拉低60us120us ds = 0; i = 8; while(i0) i-;/拉低约64us, 符号要求 ds = 1; i+; i+;/整个写0时隙过程已经超过60us, 这里就不用像写1那样, 再延时64us了 /向DS18B20发送温度转换命令void sendChangeCmd() dsInit(); /初始化DS18B20, 无论什么命令, 首先都要发起初始化 dsWait(); /等待DS18B20应答 delay_wendu(1); /延时1ms, 因为DS18B20会拉低DQ 60240us作为应答信号 writeByte(0xcc); /写入跳过序列号命令字 Skip Rom writeByte(0x44); /写入温度转换命令字 Convert T/向DS18B20发送读取数据命令void sendReadCmd() dsInit(); dsWait(); delay_wendu(1); writeByte(0xcc); /写入跳过序列号命令字 Skip Rom writeByte(0xbe); /写入读取数据令字 Read Scratchpad/获取当前温度值int getTmpValue() unsigned int tmpvalue; int value; /存放温度数值 float t; unsigned char low, high; sendReadCmd(); /连续读取两个字节数据low = readByte();high = readByte(); /将高低两个字节合成一个整形变量 /计算机中对于负数是利用补码来表示的 /若是负值, 读取出来的数值是用补码表示的, 可直接赋值给int型的value tmpvalue = high; tmpvalue 0 ? 0.5 : -0.5); /大于0加0.5, 小于0减0.5 return value;void HandleKeyPress(); void KeyScan() /按键扫描 static unsigned char state=0;unsigned char temp; if (key1=0) temp=key_vaule1; else if (key2=0) temp=key_vaule2; else if (key3=0) temp=key_vaule3; else if (key4=0) temp=key_vaule4; else temp=0; switch (state) case 0: if(temp!=0) state=1;break;case 1: state=2; break;case 2: if(temp!=0) state=3;keypress=temp; else state=0; break;case 3: if(temp=0) HandleKeyPress();state=0; break; void HandleKeyPress() /按键功能的设置 if (keypress=key_vaule1) /功能键的设置 FunKeyFlag=(FunKeyFlag+1)%7; else if (keypress=key_vaule2) /第二个按键的设置 switch (FunKeyFlag) case 0:hour+;if(hour23)hour=0;break; case 1:min+;if(min59)min=0;break; case 2:sec+;if(sec59)min=0;break; case 3:ri+;xingqi+;if(ri30)ri=1;if(xingqi7)xingqi=1;break; case 4:yue+;if(yue12)yue=1;break; case 5:nian+;break; else if (keypress=key_vaule3) /第三个按键的设置 switch (FunKeyFlag) case 0:hour-;if(hour0)hour=23;break; case 1:min-;if(min0)min=59;break; case 2:sec-;if(sec0)sec=59;break; case 3:ri-;xingqi-;if(ri1)ri=31;if(xingqi1)xingqi=1;break; case 4:yue-;if(yue0;x-)for(y=110;y0;y-);void write_com(uchar com)lcdrs=0;P0=com;delay(5);lcden=1;delay(5);lcden=0;void write_data(uchar date)lcdrs=1;P0=date;flag=1;delay(5);lcden=1;delay(5);lcden=0;shijian_show(uchar wei,shijian ) uchar shi,ge;shi=shijian/10;ge=shijian%10;write_com(0x80+0x40+wei);write_data(0x30+shi);write_data(0x30+ge); rili_show(uchar wei,rili ) uchar shi,ge;shi=rili/10;ge=rili%10;write_com(0x80+wei);write_data(0x30+shi);write_data(0x30+ge); nian_show(uchar wei,shijian ) uchar shi,ge,qian,bai;qian=shijian/1000;bai=shijian%1000/100;shi=shijian%100/10;ge=shijian%10;write_com(0x80+wei);write_data(0x30+qian);write_data(0x30+bai);write_data(0x30+shi);write_data(0x30+ge); wendu_show(uchar wei,int wendu ) uchar shi,ge,qian,bai,xiao;qian=wendu/10000;bai=wendu%10000/1000;shi=wendu%1000/100;ge=wendu%100/10; xiao=wendu%10;write_com(0x80+0x40+wei);write_data(0x30+qian);write_data(0x30+bai);write_data(0x30+shi);/write_com(0x80+0x40+wei+1); write_data(0xdf);write_data(0x30+ge); write_data(0x30+xiao);void init() P0=0;dula=0;wela=0;lcden=0;write_com(0x38);write_com(0x0c);write_com(0x06);write_com(0x01);void week_show() /星期的显示 write_com(0x80+12); switch (xingqi) case 1: write_data(M); write_data(o); write_data(n); break;case 2: write_data(T);write_data(u);write_data(e); break;case 3: write_data(W); write_data(e); write_data(d); break; case 4: write_data(T); write_data(h); write_data(u); break; case 5: write_data(F); write_data(r); write_data(i); break;case 6: write_data(S); write_data(a); write_data(t); break; case 7: write_data(S); write_data(u); write_data(n); break; void main() TMOD = 0x01;TH0 = (65536-1000)/256;TL0 = (65536-1000)%256;EA = 1;ET0 = 1;TR0 = 1;init();while(1) nian_show(1,nian); rili_show(6,yue); rili_show(9,ri); shijian_show(0,hour); shijian_show(3,min); shijian_show(6,sec); write_com(0x80+5); write_data(0x2d); write_com(0x80+8); write_data(0x2d); write_com(0x80+0x40+2); write_data(0x3A); write_com(0x80+0x40+5); write_data(0x3A); week_show();wendu_show(10,tempValue); void time() interrupt 1 TH0 = (65536-1000)/256;TL0 = (65536-1000)%256;ms_10-;s_1_1-; if(s_1_1=0) s_1_1=1000; sendChangeCmd(); /显示5次 tempValue = getTmpValue(); /计算温度 if(ms_10=0) /按键扫描 ms_10=10; KeyScan(); s_1-; if(s_159) sec=0; min+; if(min59) min=0; hour+; if(hour23) hour=0; ri+; xingqi+; if(xingqi7) xingqi=1; if(yue=1|yue=3|yue=5|yue=7|yue=8|yue=10|yue