6410串口编程初步

基于飞凌ok6410

串口调试工具3.0，两根usb转串口，一根用于终端调试，一根接串口扩展的com1,com1接pc实现串口助手 

#include <stdio.h>

#include <string.h>

#include <sys/types.h>

#include <errno.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <unistd.h>

#include <termios.h>

#include <stdlib.h>

/*鎵撳紑涓插彛鍑芥暟*/

int open_port(int fd,int comport)

{
 
 char *dev[]={"/dev/ttySAC0","/dev/ttySAC1","/dev/ttySAC2"};
 
 long vdisable;
 
 if (comport==1)//涓插彛 1
 
 {
  
  fd = open( "/dev/ttySAC0", O_RDWR|O_NOCTTY|O_NDELAY);
  
  if (-1 == fd)
  {
  
   perror("Can't Open Serial Port0");
   
   return(-1);
  
  }
 
 }

       else if(comport==2)//涓插彛 2

 {
 
 fd = open( "/dev/ttySAC1", O_RDWR|O_NOCTTY|O_NDELAY);
 
 if (-1 == fd)
  {
  
  perror("Can't Open Serial Port1");
  
  return(-1);
  
  }
 
 }

       else if (comport==3)//涓插彛 3

 {
 
 fd = open( "/dev/ttySAC2", O_RDWR|O_NOCTTY|O_NDELAY);
 
 if (-1 == fd)
  {
  
  perror("Can't Open Serial Port2");
  
  return(-1);
  
  }
 
 }

 /*鎭㈠涓插彛涓洪樆濉炵姸鎬?/
 
 if(fcntl(fd, F_SETFL, 0)<0)
 
 printf("fcntl failed!\n");
 
 else
 
 printf("fcntl=%d\n",fcntl(fd, F_SETFL,0));
 
 /*娴嬭瘯鏄惁涓虹粓绔澶?/
 
 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 set_opt(int fd,int nSpeed, int nBits, char nEvent, int nStop)

{

 struct termios newtio,oldtio;
 
 /*淇濆瓨娴嬭瘯鐜版湁涓插彛鍙傛暟璁剧疆,鍦ㄨ繖閲屽鏋滀覆鍙ｅ彿绛夊嚭閿?浼氭湁鐩稿叧鐨勫嚭閿欎俊鎭?/
 
 if ( tcgetattr( fd,&oldtio) != 0)
  {
 
 perror("SetupSerial 1");
 
 return -1;

 }

 bzero( &newtio, sizeof( newtio ) );
 
 /*姝ラ涓€,璁剧疆瀛楃澶у皬*/
 
 newtio.c_cflag |= CLOCAL | CREAD;
 
 newtio.c_cflag &= ~CSIZE;
 
 /*璁剧疆鍋滄浣?/

 switch( nBits )
 
  {
  
   case 7:
   
   newtio.c_cflag |= CS7;
   
   break;
   
   case 8:
   
   newtio.c_cflag |= CS8;
   
   break;
  
  }
 
 /*璁剧疆濂囧伓鏍￠獙浣?/
 
 switch( nEvent )
 
 {
 
  case 'O': //濂囨暟
  
  newtio.c_cflag |= PARENB;
  
  newtio.c_cflag |= PARODD;
  
  newtio.c_iflag |= (INPCK | ISTRIP);
  
  break;
  
  case 'E': //鍋舵暟
  
  newtio.c_iflag |= (INPCK | ISTRIP);
  
  newtio.c_cflag |= PARENB;
  
  newtio.c_cflag &= ~PARODD;
  
  break;
  
  case 'N': //鏃犲鍋舵牎楠屼綅
  
  newtio.c_cflag &= ~PARENB;
  
  break;
 
 }
 
 /*璁剧疆娉㈢壒鐜?/
 
 switch( nSpeed )
 
 {
 
  case 2400:
  
  cfsetispeed(&newtio, B2400);
  
  cfsetospeed(&newtio, B2400);
  
  break;
  
  case 4800:
  
  cfsetispeed(&newtio, B4800);
  
  cfsetospeed(&newtio, B4800);
  
  break;
  
  case 9600:
  
  cfsetispeed(&newtio, B9600);
  
  cfsetospeed(&newtio, B9600);
  
  break;
  
  case 115200:
  
  cfsetispeed(&newtio, B115200);
  
  cfsetospeed(&newtio, B115200);
  
  break;
  
  case 460800:
  
  cfsetispeed(&newtio, B460800);
  
  cfsetospeed(&newtio, B460800);
  
  break;
  
  default:
  
  cfsetispeed(&newtio, B9600);
  
  cfsetospeed(&newtio, B9600);
  
  break;
 
 }
  
  /*璁剧疆鍋滄浣?/
 
  if( nStop == 1 )
  
  newtio.c_cflag &= ~CSTOPB;
  
  else if ( nStop == 2 )
  
  newtio.c_cflag |= CSTOPB;
  
  /*璁剧疆绛夊緟鏃堕棿鍜屾渶灏忔帴鏀跺瓧绗?/
  
  newtio.c_cc[VTIME] = 0;
  
  newtio.c_cc[VMIN] = 0;
  
  /*澶勭悊鏈帴鏀跺瓧绗?/
  
  tcflush(fd,TCIFLUSH);
  
  /*婵€娲绘柊閰嶇疆*/
  
  if((tcsetattr(fd,TCSANOW,&newtio))!=0)
  
   {
   
   perror("com set error");
   
   return -1;
   
   }
  
  printf("set done!\n");
  
  return 0;

}

 

 

int main(void)

{

 int fd;
 
 int nwrite,i,nread;
 
 //char buff[]="Hello\n";
 
 
 if((fd=open_port(fd,2))<0)
 {
  //鎵撳紑涓插彛
  
  perror("open_port error");
   
  return;

 }

 if((i=set_opt(fd,115200,8,'N',1))<0)
 {//璁剧疆涓插彛
 
  perror("set_opt error");
  
  return;

 }

 printf("fd=%d\n",fd);
 
 for(i=0; i<100; i++)
 {
char buff[]="11\n";
 printf("nread=%d,%s\n",nread,buff);
printf("--------This is yuanlai de buff---------\n");
  nwrite=write(fd,buff,sizeof(buff));//鍐欎覆鍙?
  nread=read(fd,buff,1024);
  
  //printf("nwrite=%d,%s\n",nwrite,buff);
  printf("nread=%d,%s\n",nread,buff);
printf("--------THIS IS CHANGED DUFF-----\n");
  
  sleep(1);
 
 }
 
 close(fd);
 
 return;

}

----------------------------------------------

下面是 友善的 GPRS + 串口 程序。。当做笔记了。。哈哈

----------------------------------------------------

这有个友善的串口例程，参考下吧，用gcc编译可以在linux下用# include <stdio.h># include <stdlib.h># include <termio.h># include <unistd.h># include <fcntl.h># include <getopt.h># include <time.h># include <errno.h># include <string.h>int CommFd, TtyFd;static void Error(const char *Msg){    fprintf (stderr, "%s\n", Msg);    fprintf (stderr, "strerror() is %s\n", strerror(errno));    exit(1);}static void Warning(const char *Msg){     fprintf (stderr, "Warning: %s\n", Msg);}static int SerialSpeed(const char *SpeedString){    int SpeedNumber = atoi(SpeedString);#   define TestSpeed(Speed) if (SpeedNumber == Speed) return B##Speed    TestSpeed(1200);    TestSpeed(2400);    TestSpeed(4800);    TestSpeed(9600);    TestSpeed(19200);    TestSpeed(38400);    TestSpeed(57600);    TestSpeed(115200);    TestSpeed(230400);    Error("Bad speed");    return -1;}static void PrintUsage(void){   fprintf(stderr, "comtest - interactive program of comm port\n");   fprintf(stderr, "press [ESC] 3 times to quit\n\n");   fprintf(stderr, "Usage: comtest [-d device] [-t tty] [-s speed] [-7] [-c] [-x] [-o] [-h]\n");   fprintf(stderr, "         -7 7 bit\n");   fprintf(stderr, "         -x hex mode\n");   fprintf(stderr, "         -o output to stdout too\n");   fprintf(stderr, "         -c stdout output use color\n");   fprintf(stderr, "         -h print this help\n");   exit(-1);}static inline void WaitFdWriteable(int Fd){    fd_set WriteSetFD;    FD_ZERO(&WriteSetFD);    FD_SET(Fd, &WriteSetFD);    if (select(Fd + 1, NULL, &WriteSetFD, NULL, NULL) < 0) {   Error(strerror(errno));    } }int sendUart(char c) {   WaitFdWriteable(CommFd);   return write(CommFd, &c, 1); }char recUart(){  char c='\0';  if (FD_ISSET(CommFd, &ReadSetFD))  {    if(read(CommFd, &c, 1) == 1) return c;    else printf("No data to receive.\n");  }}int main(int argc, char **argv){    struct termios TtyAttr;    struct termios BackupTtyAttr;    int DeviceSpeed = B115200;    int TtySpeed = B115200;    int ByteBits = CS8;    const char *DeviceName = "/dev/ttyS0";    const char *TtyName = "/dev/tty";    int OutputHex = 0;    int OutputToStdout = 0;    int UseColor = 0;    printf("Now we start.\n");    opterr = 0;    for (;;) {        int c = getopt(argc, argv, "d:s:t:7xoch");        if (c == -1)            break;        switch(c) {        case 'd':            DeviceName = optarg;            break;        case 't':            TtyName = optarg;            break;        case 's':     if (optarg[0] == 'd') {  DeviceSpeed = SerialSpeed(optarg + 1);     } else if (optarg[0] == 't') {  TtySpeed = SerialSpeed(optarg + 1);     } else             TtySpeed = DeviceSpeed = SerialSpeed(optarg);            break; case 'o':     OutputToStdout = 1;     break; case '7':     ByteBits = CS7;     break;        case 'x':            OutputHex = 1;            break; case 'c':     UseColor = 1;     break;        case '?':        case 'h':        default:     PrintUsage();        }    }    if (optind != argc)        PrintUsage();    CommFd = open(DeviceName, O_RDWR, 0);    if (CommFd < 0) Error("Unable to open device");    if (fcntl(CommFd, F_SETFL, O_NONBLOCK) < 0)      Error("Unable set to NONBLOCK mode");    memset(&TtyAttr, 0, sizeof(struct termios));    TtyAttr.c_iflag = IGNPAR;    TtyAttr.c_cflag = DeviceSpeed | HUPCL | ByteBits | CREAD | CLOCAL;    TtyAttr.c_cc[VMIN] = 1;    if (tcsetattr(CommFd, TCSANOW, &TtyAttr) < 0)        Warning("Unable to set comm port");    TtyFd = open(TtyName, O_RDWR | O_NDELAY, 0);    if (TtyFd < 0) Error("Unable to open tty");    TtyAttr.c_cflag = TtySpeed | HUPCL | ByteBits | CREAD | CLOCAL;    if (tcgetattr(TtyFd, &BackupTtyAttr) < 0) Error("Unable to get tty");    if (tcsetattr(TtyFd, TCSANOW, &TtyAttr) < 0) Error("Unable to set tty");    for (;;) { unsigned char Char = 0; fd_set ReadSetFD; void OutputStdChar(FILE *File) {     char Buffer[10];     int Len = sprintf(Buffer, OutputHex ? "%.2X  " : "%c", Char);     fwrite(Buffer, 1, Len, File); } FD_ZERO(&ReadSetFD); FD_SET(CommFd, &ReadSetFD); FD_SET( TtyFd, &ReadSetFD);# define max(x,y) ( ((x) >= (y)) ? (x) : (y) ) if (select(max(CommFd, TtyFd) + 1, &ReadSetFD, NULL, NULL, NULL) < 0) {     Error(strerror(errno)); }# undef max if (FD_ISSET(CommFd, &ReadSetFD)) {     while (read(CommFd, &Char, 1) == 1) {  WaitFdWriteable(TtyFd);  if (write(TtyFd, &Char, 1) < 0) {        Error(strerror(errno));  }  if (OutputToStdout) {      if (UseColor)   fwrite("\x1b[01;34m", 1, 8, stdout);      OutputStdChar(stdout);      if (UseColor)   fwrite("\x1b[00m", 1, 8, stdout);      fflush(stdout);  }     } } if (FD_ISSET(TtyFd, &ReadSetFD)) {     while (read(TtyFd, &Char, 1) == 1) {         static int EscKeyCount = 0;  WaitFdWriteable(CommFd);         if (write(CommFd, &Char, 1) < 0) {        Error(strerror(errno));  }  if (OutputToStdout) {      if (UseColor)   fwrite("\x1b[01;31m", 1, 8, stderr);      OutputStdChar(stderr);      if (UseColor)   fwrite("\x1b[00m", 1, 8, stderr);      fflush(stderr);         }        if (Char == '\x1b') {                    EscKeyCount ++;                    if (EscKeyCount >= 3)                        goto ExitLabel;                } else                    EscKeyCount = 0;     }         }    }ExitLabel:    if (tcsetattr(TtyFd, TCSANOW, &BackupTtyAttr) < 0) Error("Unable to set tty");    return 0;}