福彩3D走势图

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RS485网络的整帧数据收发作者:黄志超    发布时间:2020-7-28 16:48:17    被阅览数:次

  BEIJING:RS485SHIZUICHANGYONGDEGONGYEXIANCHANGTONGXUNSHOUDUAN,TADECHUANSHUZIJIECAIYONGLEYIBUCHUANKOUUARTDEGUIFAN。ZAITONGCHANGDEGONGKONGYINGYONGZHONG,XUYAOCHUANSHUYOUDUOGEZIJIEZUCHENGDESHUJUZHEN,ERRS485BINGMEIYOUDUISHUJUZHENYOURENHEGUIFAN,XUYAOYINGYONGCHENGXUZIJIZUOSHUJUZHENDEJIANBIE。


  BENWENJIESHAOZAIESM6800、ESM7000HEESM8000ZHUBANSHANG,LIYONGiMX6/7/8CHUANKOUDE9bit RS485MOSHI,SHIXIANRS485TONGXUNWANGLUODEZHENGZHENSHUJUSHOUFADEGONGNENG。GAIGONGNENGKEDADAJIANHUAYINGYONGCHENGXUJIESHOUXIANCHENGDEFUZAXING,TIGAORS485TONGXUNDEXIAOLV。


福彩3D走势图  ZHENGZHENSHUJUYONGYOUGUDINGDESHUJUZHANGDU,YOUDIZHIHESHUJUGOUCHENG,DIZHIWEIYIGEZIJIE,QIYUDOUWEISHUJUZIJIE,RUXIATU:


RS485网络的整帧数据收发.png


  9bit RS485MOSHISHIYONGLECHUANKOUGUDINGXIAOYANWEIDEGONGNENG,DINGYILEDIZHIZIJIEHESHUJUZIJIE,DIZHIZIJIESHIZHIGUDINGXIAOYANWEISHIZHONGWEI1DEZIJIE。ERSHUJUZIJIEZESHIZHIGUDINGXIAOYANWEISHIZHONGWEI0DEZIJIE。TONGSHI9bit RS485MOSHISHIXIANLEYIXIEYINGJIANGUOLVDEGONGNENG,ZAIJIESHOUDESHIHOU,BIXUYAOXIANJIESHOUDAODIZHIZIJIECAIHUIKAISHIJIESHOUSHUJUZIJIE,FOUZEYINGJIANHUIJIANGSHOUDAODESHUJUZIJIEQUANBUGUOLVDIAO,TONGGUOZHEIZHONGFANGSHIJIANGDILESHEBEIDEFUZAI。SUOYI9bit RS485MOSHIGUMINGSIYI,TONGCHANGSHIYONGZAIRS485MOSHISHANGMIAN,YINWEIRS485KEYIZUOWEIZONGXIANGUAJIEDUOGESHEBEI,ZAIDUOLUSHEBEITONGXUNDEQINGKUANGXIATONGGUOZHEIZHONGXIAOYANFANGSHIKEYIYOUXIAODEJIANGDISHEBEIFUZAIHERUANJIANDEFUZACHENGDU。


福彩3D走势图  YINGCHUANGGONGKONGZHUBANZHONG,NENGGOUZHICHI9bit RS485MOSHIDEZHUBANHECHUANKOURUXIABIAO,QIZHONGES6801/ES6801LHEESM6800LZHEISANKUANHEXINBANNENGGOUMANZUDICHENGBENDEXUQIU,KEYIKAOLVZUOWEIRS485WANGLUOZHONGDESlaveDUAN:


主板型号支持9bit RS485模式的串口备注
ES6801(L)ttyS1—ttyS6适合作为Slave
ESM6800(H)ttyS1—ttyS5适合作为Master
ESM6800EttyS1—ttyS6适合作为Master
ESM6800LttyS1—ttyS6适合作为Slave
ESM6802ttyS1—ttyS4适合作为Master
ESM7000ttyS1—ttyS6适合作为Master


  RUGUOYAOSHIYONG9bit RS485MOSHI,XUYAOZAICHENGXUZHONGJINXINGSHINENG,SHINENGHOUCHUANKOUJIUHUIJINRUDAOGAIMOSHIZHONG,ZAIFASONGSHUJUDESHIHOU,KEYIZHICHILIANGZHONGFANGSHI,YIZHONGSHIFASONGDIZHIZIJIE,LINGYIZHONGSHIFASONGSHUJUZIJIE。ZAIJIESHOUSHUJUZIJIEDESHIHOU,FENWEImasterHEslaveLIANGZHONGMOSHI,ZHEILIANGZHONGMOSHIDOUXUYAOXIANJIESHOUDIZHIZIJIE,CAINENGGOUJIESHOUSHUJUZIJIE,RUGUOMEIYOUJIESHOUDAODIZHIZIJIE,HUIZIDONGJIANGSHUJUZIJIEZIDONGQUANBULVDIAO。TAMENDEQUBIEZAIYUmasterMOSHIXIA,ZHIYAOJIESHOUDAODIZHIZIJIE,JIUHUIJIANGZHEIZHIHOUDESHUJUZIJIEQUANBUJIESHOU,BINGJIAOJIYINGYONGCHENGXUCHULI。ERZAIslaveMOSHIXIA,XUYAOXIANSHEZHISHEBEIDIZHI,ZHIYOUJIESHOUDAODEDIZHIZIJIEHESHEBEIDIZHIXIANGTONGSHI,CAIHUIKAISHIJIESHOUSHUJUZIJIE。


  masterMOSHIXIA,JIESHOUSHUJUSHIYITU:


RS485网络的整帧数据收发-2.png


  SlaveMOSHIXIA,JIESHOUSHUJUSHIYITU:


RS485网络的整帧数据收发-3.png


  CAIYONG9bit RS485MOSHI,YOULIANGGEYOUDIAN,DIYIDIANSHIBUXUYAOPANDUANSHIFOUJIESHOUDAODIZHIZIJIE,YINWEICHUANKOUYAOZAIJIESHOUDAODIZHIZIJIE(XIAOYANWEIWEI1)HOU,CAIHUIJIESHOUSHUJUZIJIE,TEBIESHIZAIslaveMOSHIXIA,ZHIYOUDANGDIZHIZIJIEHESHEZHIDESHEBEIDIZHIXIANGDENGSHI,CAIHUIJIESHOUSHUJU。DIERDIANSHIBUXUYAOQIEHUANXIAOYANFANGSHI,DANGCHUANKOUQIYONGLE9bit RS485MOSHI,JIUKEYIZHENGCHANGJIESHOUSUOYOUDIZHIZIJIEHESHUJUZIJIELE,ZHIYOUZAIFASONGDIZHIZIJIEHESHUJUZIJIEDESHIHOUXUYAOQIEHUANBUTONGDESHEZHI,KEYIJIANSHAORUANJIANSHANGDECAOZUO。


  YINGCHUANGGONGSIZAITIGONGDELICHENGStep2_serialtestZHONGFENGZHUANGDECHUANKOULEICSerialDEJICHUSHANGPAISHENGCHUYIGEZHUANYONGYU9bit RS485DELEICRS485,ZAIZHEIGELEIZHONGWOMENZENGJIASHINENG9bit RS485MOSHIDEHANSHU,RANGKEHUKEYIZHIJIEDIAOYONGLAISHIXIANXIANGGUANGONGNENG。



/**

 *    派生用于9bit RS485的类

 *

**/

class CRS485 : public CSerial

{

private:

       //串口模式、设备地址和接收超时时间

       int serial_mode;

       int serial_addr;

 

public:

       //接收数据缓存和长度

       char frame[100];

       int  frame_len;

 

       /**

        *    派生类的构造函数

        *

        *    在构造函数中初始化变量,以及设置9-bit RS485模式下的串口是处于master还是slave模式

        *

        *    参数说明:

        *    mode:值为0对应master模式,值为1对应slave模式

        *    addr:设备地址,大小为8bit,当且仅当mode为1是有效。

        *

       **/

       CRS485(int mode, int addr);

 

       /**

        *    发送9bit RS485整包数据

        *

        *    函数会将地址字节和数据字节填写,并设置为相应的模式一并发送

        *

        *    参数说明:

        *    addr:设备地址,大小为8bit,填入发送数据的地址字节中

        *    Buf:发送的数据字节

        *    len:发送数据字节的长度

        *

        *    返回值说明:

        *    len:成功

        *    -1:失败

        *

       **/

       int send_rs485_frame(char addr, char *Buf, int len);

 

       /**

        *    接收9bit RS485整包数据

        *

        *    函数会阻塞接收指定长度的数据,可以设置超时时间,如果超过超时时间没有接收到指定长度的数据,则返回-1

        *

        *    参数说明:

        *    Buf:接收的数据字节

        *    len:发送数据字节的长度

        *    timeout:超时时间,单位毫秒。如果在超时时间内没有收到指定长度的数据,则返回-1。值为0则不阻塞,读取不到数据立即返回。值为-1则没有超时时间,如果接受不到指定长度数据会一直等待

        *

        *    返回值说明:

        *    成功则返回接收到的数据长度

        *    -1:超时

        *

       **/

       int recv_rs485_frame(char *Buf, int len, int timeout);

 

       /**

        *    继承自CSerial类的接收处理函数

        *

        *    在CSerial类的接收线程中会调用这个函数,可以在函数中调用recv_rs485_frame()函数,并处理接收到的数据字节

        *     

        *

       **/

       int PackagePro();

};

福彩3D走势图  ZAILEISHILIHUADESHIHOU,DAIRUCANSHUJIUKEYIJUEDINGCHUANKOUSHICHUYUmasterMOSHIHAISHIslaveMOSHI,RUGUOSHICHUYUslaveMOSHIKEYIYIQIDAIRUXUYAOSHEDINGDESHEBEIDIZHI:



//master模式

class CRS485  m_Serial(0, 0);

 

//slave模式,设备地址为0x55

class CRS485  m_Serial(1, 0x55);

福彩3D走势图  JIESHOUCHULIDESHIHOU,SHUJUDEZHANGDUTONGGUOHONGDATA_LENDINGYI,KEHUKEYIZAIPackagePro()HANSHUZHONGKEYIDINGYICHAOSHISHIJIAN,RANHOUDIAOYONGrecv_rs485_frame()HANSHULAIJIESHOUZHENGBAOSHUJU,recv_rs485_frame()HANSHUHUIZUSAI,ZHIZHISHOUDAOZHIDINGZHANGDUDESHUJU,HUOZHEDAODACHAOSHISHIJIANCAIHUIFANHUI。JIESHOUDAOZHENGBAOSHUJUHOU,JIUKEYIKAISHIJINXINGSHUJUDECHULI,ZAIJIESHOUXIANCHENGDIAOZHONGXUNHUANDIAOYONGPackageProHANSHU:



#define DATA_LEN 10                    // 数据长度

 

// 接收串口数据处理函数

int CRS485::PackagePro()

{

       int i1, timeout;

 

       //设置超时时间,单位毫秒

       timeout = 500;

 

       //调用接收函数来获取指定长度的整包数据

       i1 = recv_rs485_frame(DatBuf, m_DatLen, timeout);

 

       //接收到整包数据,调用处理程序,这里只是简单的打印

       if(i1 != -1)

       {

              printf("frame addr = 0x%x\n", frame[0]);

              printf("frame data = ");

              for(i1=1; i1<DATA_LEN; i1++) {

                     printf("0x%x ", frame[i1]);

              }

              printf("\n");

 

              //处理完数据,清除各个变量,重新设置串口以等待下一包数据

              memset(frame, 0, 100);

              frame_len = 0;

       }

       else

              printf("time out!\n");

 

       return i1;

}

  ZAIXIANCHENGZHONGDECHULI,XUNHUANDIAOYONGJIESHOUCHULIHANSHUJIKE,YINWEIrecv_rs485_frame()HANSHUHUIZUSAI,ZHIZHISHOUDAOZHIDINGZHANGDUDESHUJU,HUOZHEDAODACHAOSHISHIJIANCAIHUIFANHUI:



int CSerial::ReceiveThreadFunc(void* lparam)

{

       CSerial *pSer = (CSerial*)lparam;

 

       //定义读事件集合

       fd_set fdRead;

       int ret;

       struct timeval     aTime;

 

       while( 1 )

       {

              //接收处理函数

              pSer->PackagePro( pSer->DatBuf, pSer->m_DatLen);

 

       }

 

       printf( "ReceiveThreadFunc finished\n");

       pthread_exit( NULL );

       return 0;

}

  CHUANKOUZAIFASONGDESHIHOU,BIJIAOJIANDAN,ZHIJIEDIAOYONGsend_rs485_frame()HANSHU,TIANRUXUYAOFASONGDEDIZHIHESHUJUJIKE,SHIYONGXIAMIANDEDAIMALAICESHI:



char        addr = 0x55;

char    Buf[2];

 

Buf[0] = 0x55;

Buf[1] = 0xaa;

 

//发送地址字节和数据字节

m_Serial.send_rs485_frame(addr, Buf, sizeof(Buf));


  主板实际输出的波形如下:


RS485网络的整帧数据收发.png


福彩3D走势图  GANXINGQUDEKEHUKEYIHEYINGCHUANGDEGONGCHENGSHILIANXI,SUOQUWANZHENGDECESHIGONGCHENG。

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