Attachment 144211 Details for Bug 220498 – USB to Serial adapter status line test program.

USB to Serial adapter status line test program.

adapter_test.c (text/plain), 2.45 KB, created by Charles Sullivan on 2006-12-21 19:53:56 UTC

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Creator: Charles Sullivan

Created: 2006-12-21 19:53:56 UTC

Size: 2.45 KB

patch

obsolete

>#include <stdio.h>
>#include <stdlib.h>
>#include <string.h>
>#include <sys/types.h>
>#include <sys/stat.h>
>#include <fcntl.h>
>#include <sys/ioctl.h>
>#include <unistd.h>
>
>
>int main ( int argc, char *argv[] )
>{
>   int fd, j, k, drive;
>   int status, saved;
>   char cmdline[80];
>
>   static struct {
>     char *name;
>     int  pin;
>     int  tiocm;
>   } inpin[4] = {
>     { "RI ", 9, TIOCM_RI },
>     { "CD ", 1, TIOCM_CD },
>     { "DSR", 6, TIOCM_DSR },
>     { "CTS", 8, TIOCM_CTS },
>   }, outpin[2] = {
>     { "DTR", 4, TIOCM_DTR },
>     { "RTS", 7, TIOCM_RTS },
>   };
>
>   enum {DTR, RTS};
>
>   drive = DTR;
>
>   if ( argc != 2 ) {
>      fprintf(stderr, "Usage: %s  serial_port\n", argv[0]);
>      return 1;
>   }
>
>   /* Set up reasonable port parameters */
>   sprintf(cmdline, "stty -F %s 4800 cs8 raw cread clocal -parenb -cstopb -echo", argv[1]);
>   if ( system(cmdline) < 0 ) {
>      fprintf(stderr, "system() failed with stty on port %s\n", argv[1]);
>      return 1;
>   }
>   usleep(100000);
>
>   /* Open the port */
>   if ( (fd = open(argv[1], O_RDWR | O_NONBLOCK)) < 0 ) {
>      fprintf(stderr, "Unable to open port %s\n", argv[1]);
>      return 1;
>   }
>
>   if ( ioctl(fd, TIOCMGET, &status) < 0 ) {
>      fprintf(stderr,
>	 "Status lines are not supported by the serial port hardware.\n");
>      return 1;
>   }
>
>   saved = status;
>
>   printf("Jumpered pin %2d   to", outpin[drive].pin);
>   for ( k = 0; k < 4; k++ ) 
>      printf("   %2d", inpin[k].pin);
>   printf("\n");
>
>   printf("Status Line: %-3s  => ", outpin[drive].name);
>   for ( k = 0; k < 4; k++ )
>      printf("  %-3s", inpin[k].name);
>   printf("\n             ---       ---  ---  ---  ---\n");
>
>
>   for ( j = 0; j < 2; j++ ) {
>      status &= ~(outpin[drive].tiocm);
>      ioctl(fd, TIOCMSET, &status);
>      usleep(100000);
>
>      ioctl(fd, TIOCMGET, &status);
>
>      printf("             %3s  =>  ",
>	 ((status & outpin[drive].tiocm) ? "SET" : "clr"));
>      for ( k = 0; k < 4; k++ ) {
>         printf(" %3s ",
>            ((status & inpin[k].tiocm) ? "SET" : "clr"));
>      }
>      printf("\n");
>
>      status |= outpin[drive].tiocm;
>      ioctl(fd, TIOCMSET, &status);
>      usleep(100000);
>
>      ioctl(fd, TIOCMGET, &status);
>
>      printf("             %3s  =>  ",
>	 ((status & outpin[drive].tiocm) ? "SET" : "clr"));
>      for ( k = 0; k < 4; k++ ) {
>         printf(" %3s ",
>            ((status & inpin[k].tiocm) ? "SET" : "clr"));
>      }
>      printf("\n");
>   }
>   printf("\n");
>
>   ioctl(fd, TIOCMSET, &saved);
>   
>   return 0;
>}
>

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Attachments on bug 220498: 144211