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1、.嵌入式实验报告题目:linux串口和网络编程...一、实验目的:1、强化本学期所学的相关的内容。2、掌握串口相关设置。3、强化基于TCP网络传输的三次握手。4、自学Linux线程的使用。二、实验内容:本试验基于server和client的透明传输来实现类似于QQ的聊天功能。三、实验过程:1、linux开发环境的建立2、嵌入式linux系统的搭建1>BootLoader的移植2>linux系统的裁剪与移植Linux内核裁剪./make_image生成自己的uImage2638...上电验证:...3>根文件系统的移植修改hostna
2、me为:whmtt./mkcramfsdisk_new生成rootfs_new.cramfs...大小从老师给的40000到37b00(因为有的没有用到,大小变小了):上电验证:...3、客服端编程client.c相关代码:#include#include#include#include#include#include#include#include#d
3、efineSERVER_PORT20000//设置服务端口#defineCLIENT_PORT((20001+rand())%65536)//设置客户端端口(随机)#defineBUFFER_SIZE256#defineLENGTH_OF_LISTEN_QUEUE10//可窃听队列长为10#defineWELCOME_MESSAGE"welcometoconnecttheserver."voidusage(char*name){...printf("usage:%sIpAddr",name);}structsockaddr_in
4、servaddr,cliaddr;intservfd,clifd,length=0;structsockaddr_inservaddr,cliaddr;socklen_tsocklen=sizeof(servaddr);charbuf[BUFFER_SIZE],buf2[BUFFER_SIZE];pthread_ttidp,tidp2;intpth;intrunflag=0;void*Thread1(void*arg)/*等待runflag为1,当为1时清空buf,同时接收来自server的数据并输出。但当没有清空,则break.*
5、/{while(runflag){memset(buf,0,BUFFER_SIZE);length=recv(clifd,buf,BUFFER_SIZE,0);if(strstr(buf,"$")>0){runflag=0;printf("stop!");break;}if(length>0)printf("fromserver:%s",buf);}}void*Thread2(void*arg)/*等待发送数据给Server*/{printf("PleaseinputyourwordstoServer:--$tostop")
6、;while(runflag){memset(buf2,0,BUFFER_SIZE);scanf("%s",buf2);send(clifd,buf2,strlen(buf2),0);if(strstr(buf2,"$")>0){runflag=0;printf("stop!");break;}}}intmain(intargc,char**argv){if(argc<2){usage(argv[0]);exit(1);}if((clifd=socket(AF_INET,SOCK_STREAM,0))<0)...//用tcp定义
7、socket{printf("createsocketerror!");exit(1);}srand(time(NULL));//initializerandomgeneratorbzero(&cliaddr,sizeof(cliaddr));cliaddr.sin_family=AF_INET;cliaddr.sin_port=htons(CLIENT_PORT);cliaddr.sin_addr.s_addr=htons(INADDR_ANY);if(bind(clifd,(structsockaddr*)&cliaddr,
8、sizeof(cliaddr))<0){printf("bindtoport%dfailure!",CLIENT_PORT);exit(1);}//绑定的目的是让其端口是随机的,否则端口是自增1//一般情况下client端不用绑定