图上不了 就不传了#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <errno.h>
#include <termios.h>
#include <sys/stat.h>
int set_opt(int fd, int nSpeed, int nBits, char nEvent, int nStop)
{
struct termios newtio, oldtio;
/*保存测试现有串口参数设置，在这里如果串口号等出错，会有相关的出错信息*/
if(tcgetattr(fd, &oldtio) != 0)
{
perror("SetupSerial 1");
return -1;
}
bzero(&newtio, sizeof(newtio));
/*一 设置字符大小*/
newtio.c_cflag |= CLOCAL | CREAD;
// newtio.c_cflag &= ~CSIZE;
newtio.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
newtio.c_oflag &= ~OPOST;
newtio.c_iflag &= ~IXON;
newtio.c_iflag |= IXANY;
/*设置数据位 */
switch(nBits)
{
case 7:
newtio.c_cflag |= CS7;
break;
case 8:
newtio.c_cflag |= CS8;
break;
}
/*设置奇偶校验位*/
switch(nEvent)
{
case 'O'://奇数
newtio.c_cflag |= PARENB ;
newtio.c_cflag |= PARODD ;
newtio.c_iflag |= (INPCK | ISTRIP);
break;
case 'E'://偶数
newtio.c_cflag |= PARENB ;
newtio.c_cflag &= ~PARODD ;
newtio.c_iflag |= (INPCK | ISTRIP);
break;
case 'N':// 无奇偶校验位
newtio.c_cflag &= ~PARENB ;
break;
}
/*设置波特率*/
switch(nSpeed)
{
case 4800:
cfsetispeed(&newtio, B4800);
cfsetospeed(&newtio, B4800);
break;
case 9600:
cfsetispeed(&newtio, B9600);
cfsetospeed(&newtio, B9600);
break;
case 19200:
cfsetispeed(&newtio, B19200);
cfsetospeed(&newtio, B19200);
break;
case 57600:
cfsetispeed(&newtio, B57600);
cfsetospeed(&newtio, B57600);
break;
case 115200:
cfsetispeed(&newtio, B115200);
cfsetospeed(&newtio, B115200);
break;
default:
cfsetispeed(&newtio, B115200);
cfsetospeed(&newtio, B115200);
break;
}
/*设置停止位 */
if(1 == nStop)
newtio.c_cflag &= ~CSTOPB;
else if(2 == nStop)
newtio.c_cflag |= CSTOPB;
/*设置等待时间和最小接收字符 */
newtio.c_cc = 1;
newtio.c_cc = 255;
/*处理未接收字符*/
tcflush(fd, TCIFLUSH);
/*激活新配置*/
if((tcsetattr(fd, TCSANOW, &newtio))!=0)
{
perror("com set error!");
return -1;
}
printf("Set done!\n");
return 0;
}
int open_port(int comport)
{
int fd = -1;
switch(comport)
{
case 0:
{
fd = open("/dev/ttyO0", O_RDWR|O_NOCTTY|O_NDELAY);
if(-1 == fd)
{
perror("Can't open Serial Port");
return -1;
}
}
break;
case 1:
{
fd = open("/dev/ttyO1", O_RDWR|O_NOCTTY|O_NDELAY);
if(-1 == fd)
{
perror("Can't open Serial Port");
return -1;
}
}
break;
case 2:
{
fd = open("/dev/ttyO2", O_RDWR|O_NOCTTY|O_NDELAY);
if(-1 == fd)
{
perror("Can't open Serial Port");
return -1;
}
}
break;
case 3:
{
fd = open("/dev/ttyO3", O_RDWR|O_NOCTTY|O_NDELAY);
if(-1 == fd)
{
perror("Can't open Serial Port");
return -1;
}
}
break;
}
/*恢复串口为阻塞状态*/
if(fcntl(fd, F_SETFL, 0)<0)
printf("fcntl failed!\n");
else
printf("fcntl=%d\n", fcntl(fd,F_SETFL,0));
/*测试是否为终端设备*/
if(isatty(STDIN_FILENO) == 0)
printf("standard input is not a terminal device \n");
else
printf("isatty success!\n");
printf("fd-open=%d\n",fd);
return fd;
}
int main(int argc,char *argv[])
{
int fd,fdcom;
int nread,maxd,nwrite,m,zread,zwrite,tmp,temp,i,j,fs_sel;
fd_set fs_read;
char buff,buffer;// = "comchecks";
fdcom = open_port(atoi(argv));
if(fdcom<0)
{
perror("Open_prot 2error");
return;
}
//printf("com handle: %d \n", fdcom);
if(argv!=NULL)
{
fd = open_port(atoi(argv));
if(fd<0)
{
perror("Open_prot error");
return;
}
}
if(argv!=NULL)
{
temp=set_opt(fdcom,atoi(argv), 8, 'N', 1);
if(temp<0)
{
perror("Set_opt ttyO2 error!");
return;
}
tmp=set_opt(fd,atoi(argv), 8, 'N', 1);
if(tmp<0)
{
perror("Set_opt error!");
return;
}
}
else
{
temp=set_opt(fdcom,115200,8,'N', 1);
if(temp<0)
{
perror("Set_opt ttyO2 error!");
return;
}
tmp=set_opt(fd,115200,8,'N', 1);
if(tmp<0)
{
perror("Set_opt error!");
return;
}
}
for(j=0;j<20;)
{
nwrite = write(fdcom,"fluarttest",10);//buff,strlen(buff));
printf("j=%d, send is %d fluarttest\n",j,nwrite);
lseek(fdcom,0,SEEK_SET);
zread=read(fdcom,buffer,10);
if(zread<0)
{
printf("zread error!\n");
}
else
{
char tmp;
sprintf(tmp,"0x%x",(unsigned int)(buffer));
printf("tmp %s\n",tmp);
}
}
close(fd);
close(fdcom);
return;
}
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