serfile.c

LINUX 下串口通信编程

/*
 * Program:     serfile
 * Funtcion:    transmit a file via a serial port
 * Version:     0.0.3
 * Usage:       serfile filename
 * Date:        2002-02-19
 * Author:      Paul Dean
*/

#include <stdio.h>              /* printf */
#include <fcntl.h>              /* open */
#include <string.h>             /* bzero */
#include <stdlib.h>             /* exit */
#include <sys/times.h>          /* times */
#include <unistd.h>             /* read, write, close */
#include <sys/stat.h>           /* lstat */

#include "vardef.h"
#include "serial.h"
#include "args.h"

INT32           SendAllFiles (INT32 num, char **pathname);

int main (int argc, char *argv[])
{
    parse_arguments (argc, argv);
    /* open comport */
    if (OpenComPort
        (args.port, args.baudrate, args.databit, args.stopbit,
         args.parity)) {
        fprintf (stderr,
                 "Make sure /dev/ttyS%d not in use or you have enough privilege.\n\n",
                 args.port);
        exit (-1);
    }
    SendAllFiles (argc - optind, &argv[optind]);
    CloseComPort ();
    exit (0);
}

INT32 SendAllFiles (INT32 num, char **pathname)
{
    long            oldtick, newtick;
    INT32           systick;
    float           kbps = 0, time = 0;
    long            byteSend = 0;
    struct stat     stat;

    oldtick = times (NULL);     /* get system tick number */
    /* send files in char **pathname via serial port */
    while (*pathname != NULL) {
        printf ("\nsenging file %s, echo mode: %s\n",
                *pathname, args.echo == 0 ? "off" : "on");
        if (-1 == SendFile (*pathname, args.echo)) {
            fflush (stdout);
            fflush (stderr);
            fprintf (stderr, "\ncannot send file %s\n", *pathname);
            return (-1);
        }
        lstat (*pathname, &stat);
        byteSend += stat.st_size;
        pathname++;
    }

    newtick = times (NULL);
    systick = sysconf (_SC_CLK_TCK);    /* get system clock tick per second */
    time = (float) (newtick - oldtick) / systick;
    kbps = (float) byteSend / time / 1000;
    printf ("\n%d files, %ld bytes sent in %.2fs, %.2fKbps\n",
            num, byteSend, time, kbps);
    return (0);
}