LINUX实验报告.docx

1、LINUX实验报告(此文档为word格式，下载后您可任意编辑修改！) 本科生实验报告实验课程 多传感器信息融合技术 学院名称 信息科学与技术学院 专业名称 物联网工程 学生姓名 何月明 学生学号 指导教师 赖武刚 实验地点 6B607 实验成绩 二 14 年 11月 二 14年12月 题目1.按键控制蜂鸣器增减一、实验要求。 （1）按键1:启动停止蜂鸣器。 按键2：增加频率10Hz 按键3：减小频率10Hz 按键8：退出程序。 （2）程序初始化完成后，蜂鸣器的默认状态是停止。2、实验流程图。3、实验步骤。首先明白实验的要求，从按键，数据采集去考虑程序的写法。则程序可如下：#include te

2、rmios. at a terminaln); exit(1); save terminal setting if(tcgetattr(STDIN_FILENO, &oldt) 0) perror(save the terminal setting); exit(1); set terminal as need newt = oldt; newt.c_lflag &= ( ICANON | ECHO ); if(tcsetattr(STDIN_FILENO,TCSANOW, &newt) 0) perror(set terminal); exit(1);ch = getchar();open_

3、buzzer(); restore termial setting if(tcsetattr(STDIN_FILENO,TCSANOW,&oldt) 0) perror(restore the termial setting); exit(1);return ch;static int fd = -1;static void close_buzzer(void);static void open_buzzer(void) fd = open(devpwm, 0); if (fd = 0) ioctl(fd, PWM_IOCTL_STOP); if (ioctl(fd, 2) 0) perror

4、(ioctl 2:); close(fd); fd = -1; static void set_buzzer_freq(int freq) this IOCTL command is the key to set frequency int ret = ioctl(fd, PWM_IOCTL_SET_FREQ, freq); if(ret 0) perror(set the frequency of the buzzer); exit(1); static void stop_buzzer(void) int ret = ioctl(fd, PWM_IOCTL_STOP); if(ret 0)

5、 perror(stop the buzzer); exit(1); if (ioctl(fd, 2) 0) perror(ioctl 2:); int main(int argc, char *argv) int freq = 1000 ; int buttons_fd; int i; int key; char butons8=0,0,0,0,0,0,0,0; char current_buttons8; int count_of_changed_key; buttons_fd=open(devbuttons, 0); if(buttons_fd0) printf(open device

6、buttons); exit(1); fd = open(devpwm, 0); if (fd 0) perror(open pwm_buzzer device); exit(1); while( 1 ) printf( tFreq = %dn, freq ); if(read(buttons_fd,current_buttons,size of current_buttons)!=sizof current_buttons) perror(read butons:); exit(1); for (i=0;i8;i+) if(buttonsi!=current_buttonsi) button

7、si=current_buttonsi; if(buttonsi=1) key=i+1; switch(key) case 1: set_buzzer_freq(freq ); break; case 2: if( freq 11 ) freq -= 10 ; set_buzzer_freq(freq );break;case 8:stop_buzzer();exit(0);default:break;c 题目2.模拟电压采集报警一、实验要求。功能：（1）按键1:启动停止ADC，按键8：退出程序。（2）程序初始化完成后，ADC的默认状态是停止。（3）ADC工作时，每秒采样一次电压，采集的数据写

8、入文件adcdata.dat文件保存。 （4）当ADC采样值超过1.5V的时候，蜂鸣器报警。二、流程图。 三、实验步骤。#include stdio._buzzer(void) fd = open(devpwm, 0); if (fd = 0) ioctl(fd, PWM_IOCTL_STOP); if (ioctl(fd, 2) 0) perror(ioctl 2:); close(fd); fd = -1; static void set_buzzer_freq(int freq) this IOCTL command is the key to set frequency int ret

9、 = ioctl(fd, PWM_IOCTL_SET_FREQ, freq); if(ret 0) perror(set the frequency of the buzzer); exit(1); static void stop_buzzer(void) int ret = ioctl(fd, PWM_IOCTL_STOP); if(ret 0) perror(stop the buzzer); exit(1); int main(void) int key=0; int freq = 1000 ; char buttons8=0,0,0,0,0,0,0,0; char current_b

10、uttons8; int count_of_changed_key; int i; int len; char buffer30; int adc_wr; int flag1; int flag2; unsigned char buffBUFFER_SIZE; fprintf(stderr, press Ctrl-C to stopn); int adc_fd = open(devadc, 0); if (adc_fd 0) perror(open ADC device:); return 1; int buttons_fd=open(devbuttons, O_NONBLOCK); if(b

11、uttons_fd0) printf(open device buttons); exit(1); int pwm_fd = open(devpwm, 0); if (pwm_fd 0) perror(open pwm_buzzer device); exit(1); while( 1 ) printf( tFreq =! %dn, key ); int len =read(buttons_fd,current_buttons,sizeof current_buttons); printf(len:%d,len); for(flag2=0;flag210;flag2+) for (i=0;i

12、0) if(len1500) set_buzzer_freq(freq); else bufferlen = 0; int value = -1; sscanf(buffer, %d, &value); printf(ADC Value: %dn, value); write(adc_wr,buffer,len); else perror(read ADC device:); return 1; 题目3.串口数据保存1、实验要求。（1）PC(ubuntu)串口（COM2）定时（0.1s）通过发送字符串COM Data:numn”,其中num是指的是序号，每次发送序号加1,共计发送100次。（2

13、）ARM(实验板)串口COM2接收PC(ubuntu)发过来的数据，将数据写入到comdata.dat的文件保存。2、实验流程图。3、实验步骤。Read可读文件：#include stdio.(void) int fd; int adc_wr; char buffBUFFER_SIZE; if(fd = open_port(TARGET_COM_PORT) 0) perror(open_port); return 1; if(set_com_config(fd, 8, N, 1) 0) adc_wr=open(ADCWR_FILE_NAME,O_WRONLY|O_CREAT|O_APPEND,

14、S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);); write(adc_wr,buff,sizeof(buff); while(strncmp(buff, quit, 4); close(fd); return 0;Write 可写文件：#include stdio.(void) int fd; char buffBUFFER_SIZE; char s20; int i; if(fd = open_port(HOST_COM_PORT) 0) perror(open_port); return 1; if(set_com_config(fd, 8, N, 1) 0) per

15、ror(set_com_config); return 1; for(i=0;i100;i+) memset(buff, 0, BUFFER_SIZE); memset(s, 0, 20); sprintf(s,%d,i); *memcpy(buff, COM Data:, BUFFER_SIZE);* strcpy(buff,COM Data:); strcat(buff,s); *if (fgets(buff, BUFFER_SIZE, stdin) = NULL) perror(fgets); break; * write(fd, buff, strlen(buff); usleep(1

16、00* 1000); memset(buff, 0, BUFFER_SIZE); strcpy(buff,quit); write(fd, buff, strlen(buff); close(fd); return 0;编程设计题：ADC数据网络传输程序1、实验要求。（1） 读取ADC频率为50次每秒.（2） 当读取了50次数据再通过TCP发送数据。（3） PC和ARM程序需要做网络传输包的计数器。（每次传输的数据（50字节）叫一个网络包。）（4） PC服务端需要将接收的网络包数和数据打印出来,并保存到文件名为adc_tcp文件中。2、实验流程图。3、实验步骤。在pc建立tcp server端

17、，接收arm实验板发送的数据。在arm实验板上采集adc数据，在通过tcp将adc采集的数据发送到pc。则client 端：#include systypes.(int argc, char *argv) int sockfd, sendbytes; char bufBUFFER_SIZE; char s1300; char s220; struct serv_addr; char buffer30; int i; int k=0; if(argc 3) fprintf(stderr,USAGE: .client Hostname(or ip address) Textn); exit(1);

18、 *地址解析函数* if ( 结构体中相关参数* serv_addr.sin_family = AF_INET; serv_addr.sin_port = _addr = *(struct in_addr *)_zero), 8); *调用connect函数主动发起对服务器端的连接* if(connect(sockfd,(struct sockaddr *)&serv_addr, sizeof(struct sockaddr)= -1) perror(connect); exit(1); int adc_fd = open(devadc, 0); if (adc_fd 0) perror(op

19、en ADC device:); return 1; while(1) k+; sprintf(s2,the number%-2d,k); strcat(buf,s2); for(i=0;i50;i+) int len = read(adc_fd, buffer, sizeof buffer -1); bufferlen = 0; int value = -1; sscanf(buffer, %d, &value); printf(ADC Value: %dn, value); sprintf(s1, %4d, value); strcat(buf,s1); usleep(20*1000);

20、*发送消息给服务器端* if (sendbytes = send(sockfd, buf, strlen(buf), 0) = -1) perror(send); exit(1); memset(s1, 0, 300); memset(buf, 0, sizeof(buf); close(sockfd); exit(0);Server端：#include systypes.() struct sockaddr_in server_sockaddr, client_sockaddr; int sin_size, recvbytes; int sockfd, client_fd; char buf

21、BUFFER_SIZE; int adc_wr; *建立socket连接* if (sockfd = socket(AF_INET,SOCK_STREAM,0)= -1) perror(socket); exit(1); printf(Socket id = %dn,sockfd); *设置sockaddr_in 结构体中相关参数* server_sockaddr.sin_family = AF_INET; server_sockaddr.sin_port = _addr.s_addr = INADDR_ANY; bzero(&(server_sockaddr.sin_zero), 8); i

22、nt i = 1;* 使得重复使用本地地址与套接字进行绑定 * setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i); *绑定函数bind* if (bind(sockfd, (struct sockaddr *)&server_sockaddr, sizeof(struct sockaddr)= -1) perror(bind); exit(1); printf(Bind success!n); *调用listen函数* if (listen(sockfd, MAX_QUE_CONN_NM) = -1) perror(liste

23、n); exit(1); printf(Listening.n); *调用accept函数，等待客户端的连接* if (client_fd = accept(sockfd, (struct sockaddr *)&client_sockaddr, &sin_size) = -1) perror(accept); exit(1); printf(Client Socket id = %dn,client_fd ); while(1) *调用recv函数接收客户端的请求* memset(buf , 0, sizeof(buf); if (recvbytes = recv(client_fd, buf, BUFFER_SIZE, 0) = -1) perror(recv); exit(1); printf(Received a message: %sn, buf); printf(! %dn, recvbytes); adc_wr=open(ADCWR_FILE_NAME,O_WRONLY|O_CREAT|O_APPEND,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH); write(adc_wr,b