typeterm.c

基于arm的嵌入式扫描仪和打印机的驱动程序!

#include<unistd.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<termios.h>
#include<stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <errno.h>
#include "weida_printer.h"
#define FALSE -1
#define TRUE 0
#define SERVPORT 3490
#define MAXDATASIZE 100 /*每次最大数据传输量 */
#define SERV_HOST_ADDR "192.168.1.221" 
/***@brief  设置串口通信速率
*@param  fd     类型 int  打开串口的文件句柄
*@param  speed  类型 int  串口速度
*@return  void*/

int speed_arr[] = { B38400, B19200, B9600, B4800, B2400, B1200, B300,
	    B38400, B19200, B9600, B4800, B2400, B1200, B300, };
int name_arr[] = {38400,  19200,  9600,  4800,  2400,  1200,  300,
	    38400,  19200,  9600, 4800, 2400, 1200,  300, };
void set_speed(int fd, int speed)
{
  int   i;
  int   status;
  struct termios   Opt;
  tcgetattr(fd, &Opt);
  for ( i= 0;  i < sizeof(speed_arr) / sizeof(int);  i++)
   {
   	if  (speed == name_arr[i])
   	{
   	    tcflush(fd, TCIOFLUSH);
    	cfsetispeed(&Opt, speed_arr[i]);
    	cfsetospeed(&Opt, speed_arr[i]);
    	status = tcsetattr(fd, TCSANOW, &Opt);
    	if  (status != 0)
            perror("tcsetattr fd1");
     	return;
     	}
   tcflush(fd,TCIOFLUSH);
   }
}
/**
*@brief   设置串口数据位，停止位和效验位
*@param  fd     类型  int  打开的串口文件句柄*
*@param  databits 类型  int 数据位   取值 为 7 或者8*
*@param  stopbits 类型  int 停止位   取值为 1 或者2*
*@param  parity  类型  int  效验类型 取值为N,E,O,,S
*/
int set_Parity(int fd,int databits,int stopbits,int parity)
{
	struct termios options;
 if  ( tcgetattr( fd,&options)  !=  0)
  {
  	perror("SetupSerial 1");
  	return(FALSE);
  }
  options.c_cflag &= ~CSIZE;
  switch (databits) /*设置数据位数*/
  {
  	case 7:
  		options.c_cflag |= CS7;
  		break;
  	case 8:
		options.c_cflag |= CS8;
		break;
	default:
		fprintf(stderr,"Unsupported data size\n");
		return (FALSE);
	}
  switch (parity)
  	{
  	case 'n':
	case 'N':
		options.c_cflag &= ~PARENB;   /* Clear parity enable */
		options.c_iflag &= ~INPCK;     /* Enable parity checking */
		break;
	case 'o':
	case 'O':
		options.c_cflag |= (PARODD | PARENB);  /* 设置为奇效验*/ 
		options.c_iflag |= INPCK;             /* Disnable parity checking */
		break;
	case 'e':
	case 'E':
		options.c_cflag |= PARENB;     /* Enable parity */
		options.c_cflag &= ~PARODD;   /* 转换为偶效验*/  
		options.c_iflag |= INPCK;       /* Disnable parity checking */
		break;
	case 'S':
	case 's':  /*as no parity*/
		options.c_cflag &= ~PARENB;
		options.c_cflag &= ~CSTOPB;
		break;
	default:
		fprintf(stderr,"Unsupported parity\n");
		return (FALSE);
		}
  /* 设置停止位*/   
  switch (stopbits)
  	{
  	case 1:
  		options.c_cflag &= ~CSTOPB;
		break;
	case 2:
		options.c_cflag |= CSTOPB;
		break;
	default:
		fprintf(stderr,"Unsupported stop bits\n");
		return (FALSE);
	}
  /* Set input parity option */
  if (parity != 'n')
  		options.c_iflag |= INPCK;
    options.c_cc[VTIME] = 150; // 15 seconds
    options.c_cc[VMIN] = 0;

  tcflush(fd,TCIFLUSH); /* Update the options and do it NOW */
  if (tcsetattr(fd,TCSANOW,&options) != 0)
  	{
  		perror("SetupSerial 3");
		return (FALSE);
	}
  return (TRUE);
 }
/**
*@breif 打开串口
*/
int OpenDev(char *Dev)
{
int	fd = open( Dev, O_RDWR );         //| O_NOCTTY | O_NDELAY
	if (-1 == fd)
		{ /*设置数据位数*/
			perror("Can't Open Serial Port");
			return -1;
		}
	else
	return fd;

}

main()
{
	int fd;
	int nread;
	int weida_fd,ret,length;
	char sure,sure1,ch,ch1;
	char buff[512],buf1[256];
	int sockfd, recvbytes;
	char buf[MAXDATASIZE];
	char data[MAXDATASIZE];
	struct hostent *host;
	struct sockaddr_in serv_addr;
	char *dev ="/dev/tts/1";
	weida_fd = open("/dev/weida_printer", O_WRONLY);
	if (weida_fd < 0) {
		perror("open device buttons");
		exit(1);
	}
	fd = OpenDev(dev);
	if (fd>0)
          set_speed(fd,9600);
	else
	{
	 printf("Can't Open Serial Port!\n");
	exit(0);
	}
       if (set_Parity(fd,8,1,'n')== FALSE)
       {
        printf("Set Parity Error\n");
        exit(1);
       }

	if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
	{
		perror("socket创建出错！");
		exit(1);
	}
		serv_addr.sin_family=AF_INET;
	serv_addr.sin_port=htons(SERVPORT);
	serv_addr.sin_addr.s_addr=inet_addr(SERV_HOST_ADDR);
	bzero(&(serv_addr.sin_zero),8);
	if (connect(sockfd, (struct sockaddr *)&serv_addr,  sizeof(struct sockaddr)) == -1)
	{
	perror("connect出错！");
	exit(1);
	}
while(1)
{
   		int iread,count,times;
		iread=0;
		times=0;
		nread=0;
                memset(buf1,'\0',50);
                memset(buff,'\0',50);
                memset(buf,'\0',50);
		printf("Are you sure to search the data,please enter y or n:\n");
		scanf("%c",&sure);
		scanf("%c",&sure1);
		if(sure=='y')
		{
   		while((iread = read(fd,buff,100))>0)
   		{
                  printf("%s\n",buff);	
		  count=0;
		  strcat(buf1,buff);		
		  if(buff[7]=='\0')
		  {
		   memset(buff,'\0',50);
		   break;
		  }
   	 	}	
		printf("%s\n",buf1);		
		if(buf1[0]!='\0')
		{	
		  if(send(sockfd,buf1,MAXDATASIZE,0)==-1)
		   {
			perror("send error!");	
			exit(1);
		   }
		  if ((recvbytes=recv(sockfd, buf, MAXDATASIZE, 0)) ==-1) 
		  {
		       perror("received wrong！");
		       exit(1);
		  }
		   buf[recvbytes] = '\0';
		   printf("Received: %s\n",buf);
		   ret = write(weida_fd, buf, strlen(buf));
		   if (ret != strlen(buf))
		   {
		     perror("print worng\n");
        	   }		 	
  		}
		}
	fflush(stdin);
}
	close(weida_fd);
    close(fd);
    close(sockfd);
}