自行車測速系統(tǒng)及顯示溫度

1、18B20 1602 J2,J6，18B20 1602 J2,J6，J7 P0 rins.h /包含_nop_()函數(shù)定義的頭文件unsignedcharcodeunsignedcharcodeStr=Testbyunsignedcharcodeunsigned char code Cent=Cent;*/RSP3.0 /RW P3.1 /EP3.2 /BF P0.7 sbitsbitRW=P25; sbit E=P27; sbit BF=P07; void delay1ms()unsignedchari,j; ;void delaynms(unsigned char n)unsignedch

2、ari; void delaynms(unsigned char n)unsignedchari; bit BusyTest(void)bit/根據(jù)規(guī)定，RS 為低電平，RW /result=BF; /result/E returnvoid WriteInstruction (unsigned char dic/根據(jù)規(guī)定，RSR/W /E 置低電平(8-6，寫指令時(shí)，E / E 0 1 發(fā)生正跳變，所以應(yīng)先置/P0/E /E /E /E voidnsignedchar); /函數(shù)功能：將數(shù)據(jù)(ASCII碼)寫入液晶模塊void WriteData(unsigned char y)/RS為高電平

3、，RW /E 置低電平(8-6，寫指令時(shí)，E / E 0 1 發(fā)生正跳變，所以應(yīng)先置/P0 /E /E LCD void LcdInitiate(void)/15msLCD間/顯示模式設(shè)置：162 顯示，57 點(diǎn)陣，8 ，給硬件一點(diǎn)反應(yīng)時(shí)/15msLCD間/顯示模式設(shè)置：162 顯示，57 點(diǎn)陣，8 ，給硬件一點(diǎn)反應(yīng)時(shí)，給硬件一點(diǎn)反應(yīng)時(shí)，給硬件一點(diǎn)反應(yīng)時(shí)，給硬件一點(diǎn)反應(yīng)時(shí)，給硬件一點(diǎn)反應(yīng)時(shí)，給硬件一點(diǎn)反應(yīng)時(shí)DS18B20 sbit DQ=P37;unsignedcharDS18B20傳感器初始化，bitDS18B20是否存在的標(biāo)志，flag=0，表示存在；flag=1bitDQ =for(ti

4、me=0;time2;time6;DQ =for(time=0;time200;time600/DS18B20480960us 數(shù)據(jù)線（將數(shù)據(jù)線拉高;DQ =1560us DS18B20 輸出存在脈沖/讓單片機(jī)檢測是否輸出了存在脈沖（DQ=0表示存在+) /;returnunsignedcharunsignedcharunsignedchardat;for/ unsignedcharunsignedcharunsignedchardat;for/ /DS18B20讀書據(jù)時(shí),DQDQ = 0;DQ = 1;/將數(shù)據(jù)線人為拉高,DS18B20/6us15us ;dat|=0 x80;11 dat|

5、=0 x00;/00/DQri /3us,1us ;DS18B20寫入一個(gè)字節(jié)數(shù)據(jù)WriteOneChar(unsigned char dat)unsignedchari=0; for (i=0; i8; i+)/ DQ/DS18B20 ;/30us，DS18B201560us ;/3us,1us /將dat 1 稍作延時(shí);/3us,1us /將dat 1 稍作延時(shí),void display_error(void)unsignedchar/1 1 i =while(Errori0)/100ms ;void display_explain(void)unsignedchar/1 1 i =whi

6、le(Stri0/100ms voidunsignedchar/2 1 i =while(Tempi0)voidunsignedchar/2 1 i =while(Tempi0)/1ms void display_dot(void)/210 /1ms voidunsignedchar/213 i =while(Centi!=/1ms void display_temp1(unsigned char x)/j,k,l unsignedchar/寫顯示地址,將在第2行第7列開始顯示 /將百位數(shù)字的字符常量寫入/寫顯示地址,將在第2行第7列開始顯示 /將百位數(shù)字的字符常量寫入LCD /將十位數(shù)字的字符常量寫入LCD /將個(gè)位數(shù)字的字符常量寫入LCD/1ms void display_temP3(unsigned char x)/寫顯示地址,2 11 /1ms void ReadyReadTemp(void)/DS18B20 WriteOneChar(0 xCC); / 跳過讀序號(hào)列號(hào)的操作 WriteOneChar(0 x44); / 啟動(dòng)溫度轉(zhuǎn)換 /DS18B20 ; /; /溫度寄存器,void main(void)/5ms unsi