AVR-RS485.zip_avr RS485_rs485 avr_单片机开发_嵌入式/单片机/硬件编程下载-pudn.com

<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8"> <meta name="generator" content="pdf2htmlEX"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <link rel="stylesheet" href="https://static.pudn.com/base/css/base.min.css"> <link rel="stylesheet" href="https://static.pudn.com/base/css/fancy.min.css"> <link rel="stylesheet" href="https://static.pudn.com/prod/directory_preview_static/622bb4a815da9b288bbdf861/raw.css"> <script src="https://static.pudn.com/base/js/compatibility.min.js"></script> <script src="https://static.pudn.com/base/js/pdf2htmlEX.min.js"></script> <script> try{ pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({}); }catch(e){} </script> <title></title> </head> <body> <div id="sidebar" style="display: none"> <div id="outline"> </div> </div> <div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/622bb4a815da9b288bbdf861/bg1.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x1 h3 y2 ff1 fs0 fc0 sc0 ls0 ws0">//<span class="ff2">从机程序</span></div><div class="t m0 x1 h3 y3 ff1 fs0 fc0 sc0 ls0 ws0">//01<span class="_ _0"> </span><span class="ff2">数据帧</span></div><div class="t m0 x1 h3 y4 ff1 fs0 fc0 sc0 ls0 ws0">//02<span class="_ _0"> </span><span class="ff2">命令帧</span></div><div class="t m0 x1 h3 y5 ff1 fs0 fc0 sc0 ls0 ws0">//03<span class="_ _0"> </span><span class="ff2">功能帧</span> 01 <span class="ff2">确认</span> 02 <span class="ff2">否认</span></div><div class="t m0 x1 h4 y6 ff1 fs0 fc0 sc0 ls0 ws0">#include<avr/io.h></div><div class="t m0 x1 h4 y7 ff1 fs0 fc0 sc0 ls0 ws0">#include<avr/interrupt.h></div><div class="t m0 x1 h4 y8 ff1 fs0 fc0 sc0 ls0 ws0">#include<inttypes.h></div><div class="t m0 x1 h4 y9 ff1 fs0 fc0 sc0 ls0 ws0">#include<util/delay<span class="_ _1"></span>.h></div><div class="t m0 x1 h4 ya ff1 fs0 fc0 sc0 ls0 ws0">#include <avr/pgmspace.h></div><div class="t m0 x1 h4 yb ff1 fs0 fc0 sc0 ls0 ws0">#include<string.h></div><div class="t m0 x1 h3 yc ff1 fs0 fc0 sc0 ls0 ws0">#define myaddr 0x01 //<span class="ff2">定义本机地址</span></div><div class="t m0 x1 h3 yd ff1 fs0 fc0 sc0 ls0 ws0">#define rx_485(); asm("cbi 0x13,2"); //portd.2<span class="_ _0"> </span><span class="ff2">清零</span> <span class="ff2">改为接收状态</span></div><div class="t m0 x1 h3 ye ff1 fs0 fc0 sc0 ls0 ws0">#define tx_485(); asm("sbi 0x13,2"); //portd.2<span class="_ _0"> </span><span class="ff2">置位</span> <span class="ff2">改为发送状态</span></div><div class="t m0 x1 h4 yf ff1 fs0 fc0 sc0 ls0 ws0">volatile struct conn{</div><div class="t m0 x1 h4 y10 ff1 fs0 fc0 sc0 ls0 ws0">unsigned char buf[70];</div><div class="t m0 x1 h4 y11 ff1 fs0 fc0 sc0 ls0 ws0">unsigned char data[64];</div><div class="t m0 x1 h3 y12 ff1 fs0 fc0 sc0 ls0 ws0">unsigned char srcadd;//<span class="ff2">源地址</span></div><div class="t m0 x1 h3 y13 ff1 fs0 fc0 sc0 ls0 ws0">unsigned char aimadd;//<span class="ff2">目的地址</span></div><div class="t m0 x1 h3 y14 ff1 fs0 fc0 sc0 ls0 ws0">unsigned char tp;//<span class="ff2">帧类型</span></div><div class="t m0 x1 h4 y15 ff1 fs0 fc0 sc0 ls0 ws0">int num;</div><div class="t m0 x1 h4 y16 ff1 fs0 fc0 sc0 ls0 ws0">int tmp;</div><div class="t m0 x1 h3 y17 ff1 fs0 fc0 sc0 ls0 ws0">unsigned char ver; //<span class="ff2">验证码</span>; </div><div class="t m0 x1 h3 y18 ff1 fs0 fc0 sc0 ls0 ws0">unsigned char err; //<span class="ff2">错误码</span>; 01:<span class="ff2">帧校验错</span></div><div class="t m0 x1 h4 y19 ff1 fs0 fc0 sc0 ls0 ws0">}tx,rx;</div><div class="t m0 x1 h3 y1a ff1 fs0 fc0 sc0 ls0 ws0">volatile unsigned char com; //<span class="_ _2"></span><span class="ff2">命令</span></div><div class="t m0 x1 h4 y1b ff1 fs0 fc0 sc0 ls0 ws0">const unsigned char flash_str[] PROGMEM = "0123456789";</div><div class="t m0 x1 h4 y1c ff1 fs0 fc0 sc0 ls0 ws0">ISR(USAR<span class="_ _1"></span>T_RXC_vect)</div><div class="t m0 x1 h4 y1d ff1 fs0 fc0 sc0 ls0 ws0">{ </div><div class="t m0 x1 h4 y1e ff1 fs0 fc0 sc0 ls0 ws0"> rx.buf[rx.tmp]=UDR;</div></div></div><div class="pi" data-data='{"ctm":[1.611850,0.000000,0.000000,1.611850,0.000000,0.000000]}'></div></div> </body> </html>

<div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/622bb4a815da9b288bbdf861/bg2.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x1 h4 y1f ff1 fs0 fc0 sc0 ls0 ws0"> /*test</div><div class="t m0 x1 h4 y20 ff1 fs0 fc0 sc0 ls0 ws0"> if(rx.tmp==0 && rx.buf[rx.tmp]=='t')</div><div class="t m0 x1 h4 y21 ff1 fs0 fc0 sc0 ls0 ws0"> {</div><div class="t m0 x1 h4 y22 ff1 fs0 fc0 sc0 ls0 ws0"> totx();</div><div class="t m0 x1 h4 y23 ff1 fs0 fc0 sc0 ls0 ws0"> tx.num=16;</div><div class="t m0 x1 h4 y24 ff1 fs0 fc0 sc0 ls0 ws0"> strcpy(tx.buf,"can i help you");</div><div class="t m0 x1 h4 y25 ff1 fs0 fc0 sc0 ls0 ws0"> tx.buf[15]=0x0D;</div><div class="t m0 x1 h3 y26 ff1 fs0 fc0 sc0 ls0 ws0"> UCSRB|=(1<<UDRIE);//<span class="ff2">发送帧</span></div><div class="t m0 x1 h4 y7 ff1 fs0 fc0 sc0 ls0 ws0"> };</div><div class="t m0 x1 h4 y8 ff1 fs0 fc0 sc0 ls0 ws0"> */</div><div class="t m0 x1 h3 y27 ff1 fs0 fc0 sc0 ls0 ws0"> if(rx.tmp==0 && rx.buf[rx.tmp]!=myaddr) //<span class="ff2">地址不对直接返回</span></div><div class="t m0 x1 h4 yb ff1 fs0 fc0 sc0 ls0 ws0"> {</div><div class="t m0 x1 h3 yc ff1 fs0 fc0 sc0 ls0 ws0"> //<span class="ff2">禁止接收<span class="_ _0"> </span></span>0.15<span class="_ _0"> </span><span class="ff2">秒。可行，因为使用中断模式，不影响正常使用</span></div><div class="t m0 x1 h4 y28 ff1 fs0 fc0 sc0 ls0 ws0"> UCSRB&=~(1<<RXEN);</div><div class="t m0 x1 h3 y29 ff1 fs0 fc0 sc0 ls0 ws0"> //0.15<span class="_ _0"> </span><span class="ff2">秒后自动进入接收状态。</span></div><div class="t m0 x1 h4 y2a ff1 fs0 fc0 sc0 ls0 ws0"> timer1_init();</div><div class="t m0 x1 h4 y2b ff1 fs0 fc0 sc0 ls0 ws0"> return;</div><div class="t m0 x1 h4 yf ff1 fs0 fc0 sc0 ls0 ws0"> };</div><div class="t m0 x1 h4 y10 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x1 h4 y11 ff1 fs0 fc0 sc0 ls0 ws0"> <span class="_ _3"> </span> <span class="_ _3"> </span> if((rx.tmp>4)<span class="_ _4"> </span> <span class="_ _4"> </span>&&<span class="_ _4"> </span> <span class="_ _5"> </span>(rx.tmp==rx.buf[3]+4)<span class="_ _4"> </span> <span class="_ _4"> </span>&&<span class="_ _4"> </span> <span class="_ _5"> </span>(rx.buf[rx.tmp]!</div><div class="t m0 x1 h3 y12 ff1 fs0 fc0 sc0 ls0 ws0">=rx.ver))//<span class="ff2">验证错误</span></div><div class="t m0 x1 h4 y2c ff1 fs0 fc0 sc0 ls0 ws0"> {</div><div class="t m0 x1 h3 y2d ff1 fs0 fc0 sc0 ls0 ws0"> //<span class="ff2">当接收结束后，什么事情都不干，就等待接收。</span></div><div class="t m0 x1 h4 y2e ff1 fs0 fc0 sc0 ls0 ws0"> rx.err=0x01;</div><div class="t m0 x1 h4 y15 ff1 fs0 fc0 sc0 ls0 ws0"> };</div><div class="t m0 x1 h4 y16 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x1 h4 y2f ff1 fs0 fc0 sc0 ls0 ws0"> <span class="_ _0"> </span> <span class="_ _6"> </span> if((rx.tmp>4)<span class="_ _7"></span> <span class="_ _7"></span>&&<span class="_ _8"></span> <span class="_ _8"></span>(rx.tmp==rx.buf[3]+5)<span class="_ _8"></span> <span class="_ _8"></span>&&<span class="_ _7"></span> <span class="_ _8"></span>(rx.buf[rx.tmp]==0xcc)</div><div class="t m0 x1 h3 y30 ff1 fs0 fc0 sc0 ls0 ws0">&& rx.err==0)//<span class="ff2">正常结束</span></div><div class="t m0 x1 h4 y31 ff1 fs0 fc0 sc0 ls0 ws0"> {</div><div class="t m0 x1 h3 y32 ff1 fs0 fc0 sc0 ls0 ws0"> //<span class="ff2">帧类型分情况</span></div><div class="t m0 x1 h3 y1a ff1 fs0 fc0 sc0 ls0 ws0"> //<span class="ff2">否认帧还是确认帧还是其它帧</span></div><div class="t m0 x1 h4 y1b ff1 fs0 fc0 sc0 ls0 ws0"> TCCR2 = 0x00;</div><div class="t m0 x1 h4 y1c ff1 fs0 fc0 sc0 ls0 ws0"> //POR<span class="_ _1"></span>T<span class="_ _9"></span>A+=1;</div><div class="t m0 x1 h4 y1d ff1 fs0 fc0 sc0 ls0 ws0"> if(rx.buf[2]!=3)</div><div class="t m0 x1 h4 y1e ff1 fs0 fc0 sc0 ls0 ws0"> {</div></div></div><div class="pi" data-data='{"ctm":[1.611850,0.000000,0.000000,1.611850,0.000000,0.000000]}'></div></div>