51單片機(jī)做的溫濕度測量儀 作者： 時(shí)間：2016-11-29 來源：網(wǎng)絡(luò) 加入技術(shù)交流群 掃碼加入和技術(shù)大咖面對(duì)面交流海量資料庫查詢 收藏 <a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=88&cb=INSERT_RANDOM_NUMBER_HERE&n=a635e61e' border='0' alt='' /></a> <a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=87&cb=INSERT_RANDOM_NUMBER_HERE&n=a576c0a2' border='0' alt='' /></a> //從傳感器讀數(shù)據(jù) uchar read_byte(bit ack) { uchar i,val=0; DATA=1; for(i=0x80;i>0;i=i/2) { SCK=1; if(DATA) val=val|i; SCK=0; } DATA=!ack; SCK=1; _nop_();_nop_();_nop_(); SCK=0; DATA=1; return val; } //void connectionreset() { uchar i; DATA=1; SCK=0; for(i=0;i<9;i++) { SCK=1; SCK=0; } transstart(); } uint measure1() //測量溫度函數(shù){ uchar value_1,value_2;uint tempvalue;transstart();error+=write_byte(MEASURE_TEMP);if(error!=0){connectionreset();}else { while(DATA==1){_nop_();}if(DATA==0){ value_1=read_byte(ACK);value_2=read_byte(noACK);tempvalue=value_2+value_1*256; //轉(zhuǎn)換成 16 位的 int 型}else error=1; } return tempvalue; }uint measure2() //測量濕度函數(shù){ uchar value_1,value_2; uint tempvalue; transstart(); error+=write_byte(MEASURE_HUMI); if(error!=0) connectionreset(); else { while(DATA==1) _nop_(); if(DATA==0) { value_1=read_byte(ACK);value_2=read_byte(noACK); tempvalue=value_2+value_1*256; } else error=1; } return tempvalue; } void lcdwrdata(uchar dat){dat = ((dat&0x01)<<7)|((dat&0x02)<<5)|((dat&0x04)<<3)|((dat&0x08)<<1)|((dat&0x10)>>1)|((dat&0x20)>>3)|((dat&0x40)>>5)|((dat&0x80)>>7);rs=1;//寫數(shù)據(jù)時(shí)RS拉高en=1;P0=dat;delayms(6);en=0;delayms(6);} 上一頁 1 2 3 下一頁
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