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我是基于贵公司所给的串口测试程序改的一个向串口发送AT命令的一个程序,只是在open和serial_rw()这两个地方有所改动,并把串口改为0,,但是连上短信猫就是没用,无法read。用串口调试工具向串口发送信息,ARM板上read返回-1,求解!!!!!!!
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <termios.h>
#include <errno.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "pthread.h"
#include "serial_test.h"
struct serial_config serialread;
static int serial_fd,beep_fd;
int speed_arr[] = {B230400, B115200, B57600, B38400, B19200, B9600, B4800, B2400, B1200, B300,
B38400, B19200, B9600, B4800, B2400, B1200, B300};
int name_arr[] = {230400, 115200, 57600, 38400, 19200, 9600, 4800, 2400, 1200, 300,
38400, 19200, 9600, 4800, 2400, 1200, 300};
//-----------------------------------------------
//打开配置文件
//-----------------------------------------------
void print_serialread()
{
printf("serialread.dev is %s\n",serialread.serial_dev);
printf("serialread.speed is %d\n",serialread.serial_speed);
printf("serialread.databits is %d\n",serialread.databits);
printf("serialread.stopbits is %d\n",serialread.stopbits);
printf("serialread.parity is %c\n",serialread.parity);
}
//-----------------------------------------------
//读取配置文件,并进行配置
//-----------------------------------------------
void readserialcfg()
{
FILE *serial_fp;
char j[10];
printf("readserailcfg\n");
serial_fp = fopen("/etc/tq2440_serial.cfg","r");
if(NULL == serial_fp)
{
printf("can't open /etc/tq2440_serial.cfg");
}
else
{
fscanf(serial_fp, "DEV=%s\n", serialread.serial_dev);
fscanf(serial_fp, "SPEED=%s\n", j);
serialread.serial_speed = atoi(j);
fscanf(serial_fp, "DATABITS=%s\n", j);
serialread.databits = atoi(j);
fscanf(serial_fp, "STOPBITS=%s\n", j);
serialread.stopbits = atoi(j);
fscanf(serial_fp, "PARITY=%s\n", j);
serialread.parity = j[0];
}
fclose(serial_fp);
}
//-----------------------------------------------
//设置波特率
//-----------------------------------------------
void set_speed(int fd)
{
int i;
int status;
struct termios Opt;
struct termios oldOpt;
tcgetattr(fd, &oldOpt);
// printf("serialread.speed is %d\n",serialread.serial_speed);
for( i = 0; i < sizeof(speed_arr)/sizeof(int); i++)
{
if(serialread.serial_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);
}
}
}
//-----------------------------------------------
//设置其他的参数
//-----------------------------------------------
int set_Parity(int fd)
{
struct termios options;
struct termios oldoptions;
if(tcgetattr(fd, &oldoptions) != 0)
{
perror("SetupSerial 1");
return(FALSE);
}
options.c_cflag |= (CLOCAL|CREAD);
options.c_cflag &=~CSIZE;
// printf("serialread.databits is %d\n",serialread.databits);
switch(serialread.databits)
{
case 7:
options.c_cflag |= CS7;
break;
case 8:
options.c_cflag |= CS8;
break;
default:
options.c_cflag |= CS8;
fprintf(stderr, "Unsupported data size\n");
return(FALSE);
}
// printf("serialread.parity is %c\n",serialread.parity);
switch(serialread.parity)
{
case 'n':
case 'N':
options.c_cflag &= ~PARENB;
options.c_iflag &= ~INPCK;
break;
case 'o':
case 'O':
options.c_cflag |= (PARODD | PARENB);
options.c_iflag |= INPCK;
break;
case 'e':
case 'E':
options.c_cflag |= PARENB;
options.c_cflag &= ~PARODD;
options.c_iflag |= INPCK;
break;
default:
options.c_cflag &= ~PARENB;
options.c_iflag &= ~INPCK;
fprintf(stderr, "Unsupported parity\n");
return(FALSE);
}
// printf("serialread.stopbits is %d\n",serialread.stopbits);
switch(serialread.stopbits)
{
case 1:
options.c_cflag &= ~CSTOPB;
break;
case 2:
options.c_cflag |= CSTOPB;
break;
default:
options.c_cflag &= ~CSTOPB;
fprintf(stderr, "Unsupported stop bits\n");
return(FALSE);
}
if(serialread.parity != 'n')
options.c_iflag |= INPCK;
options.c_cc[VTIME] = 0; //150; //15 seconds
options.c_cc[VMIN] = 0;
#if 1
options.c_iflag |= IGNPAR|ICRNL;
options.c_oflag |= OPOST;
options.c_iflag &= ~(IXON|IXOFF|IXANY);
#endif
tcflush(fd, TCIFLUSH);
if(tcsetattr(fd, TCSANOW, &options) != 0)
{
perror("SetupSerial 3");
return(FALSE);
}
return(TRUE);
}
//-----------------------------------------------
//打开串口设备
//-----------------------------------------------
int OpenDev(char *Dev)
{
int fd = open(Dev, O_RDWR|O_NONBLOCK);
if(-1 == fd)
{
perror("Can't Open Serial Port");
return -1;
}
else
return fd;
}
//--------------------------------------------------
串口初始化
////--------------------------------------------------
void serial_init(void)
{
char *Dev;
int i;
readserialcfg();
print_serialread();
Dev = serialread.serial_dev;
//?
serial_fd = OpenDev(Dev);
if(serial_fd > 0)
set_speed(serial_fd); //
else
{
printf("Can't Open Serial Port!\n");
exit(0);
}
//回复串口未阻塞状态
if (fcntl(serial_fd, F_SETFL, O_NONBLOCK) < 0)
{
printf("fcntl failed!\n");
exit(0);
}
//检查是否是终端设备?
/*#if 1 //如果屏蔽下面的代码,在串口就不会有回显的情况
if(isatty(STDIN_FILENO)==0)
{
printf("standard input is not a terminal device\n");
}
else
printf("isatty success!\n");
#endif*/
//设置串口的参数
if(set_Parity(serial_fd) == FALSE)
{
printf("Set parity Error\n");
exit(1);
}
}
void serial_rw()
{
int i;
char buff[512];
char buff_t[]="AT\r";
char receive[3];
char buff4[] = "AT+CMGF=1\r";
char buff2[] = "AT+CMGS=\"13836025032\"\r";
char buff3[] = "this is a test message";
int nread,nwrite;
nwrite = write( serial_fd,buff_t,sizeof(buff_t) );
printf("num of send:%d\n",nwrite);
sleep(5);
nwrite = write(serial_fd,buff4,sizeof(buff4));
sleep(5);
printf("end if mode select:%d\n",nwrite);
nwrite = write(serial_fd,buff2,sizeof(buff2));
sleep(5);
printf("nwrite=%d\n",nwrite);
nwrite = write(serial_fd,buff3,sizeof(buff3));
sleep(5);
printf("send nwrite=%d\n",nwrite);
nwrite = write(serial_fd,"\x1a",sizeof("\x1a"));
sleep(5);
printf("end of send message:%d\n",nwrite);
while(1)
{
nread=read(serial_fd,receive,sizeof(receive));
printf("nread is=%d\n",nread);
perror("Read err");
sleep(5);
}
close(serial_fd);
}
int main(int argc, char **argv)
{
serial_init();
serial_rw();
return 0;
// close(serialread.serial_dev);
// serial_test(telnum, telmoney);
} |
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