串口通信comport.c

时间：2010-06-07 来源：长江货郎

#include "comport.h" unsigned char           g_ucProcToken, g_ucCtrlZ; void syslog (int mode, char* msg, ...)
{
        va_list argptr;         va_start (argptr, msg);
        vprintf (msg, argptr);
        va_end (argptr);         printf ("\n");
} void Usage ()
{
syslog (0, "Usage: comport -d <device> [-b <baudrate>][-s <settings>] [-i<cmd>,<arg>][-h][-v]");
syslog (0, " -d   device name");
syslog (0, " -b   device baudrate (115200, 57600, 19200, 9600), default is 115200");
syslog (0, " -s   device settings (data bits, parity, stop bits, flow control), defaut is 8N1N");
syslog (0, "       data bits: 8, 7");
syslog (0, "       parity: N=None, O=Odd, E=Even, S=Space");
syslog (0, "       stop bits: 1, 0");
syslog (0, "       flow control: N=None, H=Hardware, S=Software, B=Both");
syslog (0, " -i   ioctl system call (cmd & arg only support int), used as \"-i 2,3\"");
syslog (0, " -h   this help info");
syslog (0, " -v   version number"); exit(1);
} void signal_handler (int i_sig)
{
if (SIGTERM == i_sig || SIGINT == i_sig)
{
  g_ucProcToken = 0x00;
}
else if (20 == i_sig)
{
  g_ucCtrlZ = 0x01;
}
} int main(int argc, char **argv)
{
int    oc = 0;
COM_PORT   comport;
unsigned char   ucRet = 0x00;
    unsigned char   uc_getdev = 0x00;
unsigned char   buf[512] = {0};
unsigned char   dis_mode = 0x00; // Default as %c
int    recv_bytes = 0, i=0;
struct sigaction      sigact;

if(argc < 3)
    {
  Usage();
    } memset(&comport, 0, sizeof(COM_PORT));
init_comport(&comport); while( (oc=getopt(argc, argv, "d:b:s:i:hv")) != -1)
{
  switch(oc)
  {
     case 'd':
   strncpy(comport.dev_name, optarg, BUF_64);
   dbg_print("Get device name:\t\t\"%s\"\n", comport.dev_name);
   uc_getdev = 0x01;
   break;      case 'b':
   comport.baudrate = atol(optarg);
   dbg_print("Set BaudRate as:\t\t\"%ld\"\n", comport.baudrate);
   break;      case 's':
   set_setting(optarg, &comport);
   break;      case 'h':
   Usage();
   break;      case 'i':
     case 'v':
     default:
   break;
  }
} if(0x00 == uc_getdev)
  Usage(); g_ucProcToken = 0x01;
g_ucCtrlZ = 0x00; disp_setting(&comport); // Only enable "DEBUG" will outprint it.
ucRet = comport_open(&comport);
if( 0x00 != ucRet )
{
  syslog (0, "failed to open %s. RetCode [0x%02X]", comport.dev_name, ucRet);
  goto CleanUp;
}
dbg_print("\"%s\" opened.\n", comport.dev_name); // Process level signal handler
sigemptyset (&sigact.sa_mask);
sigact.sa_flags = 0;
sigact.sa_handler = signal_handler;

sigaction (SIGTERM, &sigact, NULL); // catch terminate signal
sigaction (SIGINT, &sigact, NULL); // catch interrupt signal
sigaction (SIGSEGV, &sigact, NULL); // catch segmentation faults
sigaction (SIGTSTP, &sigact, NULL);     // catch ctrl+Z
sigaction (SIGSTOP, &sigact, NULL); // catch ctrl+Z nonblock();
while (0x01 == g_ucProcToken)
{
  ucRet = comport_recv (&comport, buf, sizeof (buf)-1, &recv_bytes, 10);
  if (0x00 == ucRet && 0 < recv_bytes)
  {
   for(i=0; i<recv_bytes; i++)
   {
       if (0x01 == dis_mode)
        printf ("%02X ", buf[i]);
       else
        printf ("%c", buf[i]);
   }    fflush(stdout);
  }   if(0 != kbhit ())
  {
   recv_bytes = fgetc (stdin);
   if (0x0a == recv_bytes) // NL
    buf[0] = 0x0d; // CR
   else
    buf[0] = recv_bytes;    comport_send (&comport, buf, 1);
  }
  else if (0x00 != g_ucCtrlZ)
  {
   g_ucCtrlZ = 0x00;
   buf [0] = 0x1A;
   comport_send (&comport, buf, 1);
  }
} printf("Close comport and exit now.\n");
comport_close (&comport);

CleanUp:
comport_term (&comport);
return 0;
}