62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
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/*
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*
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* PRU Debug Program - UIO routines
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* (c) Copyright 2011,2013 by Arctica Technologies
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* Written by Steven Anderson
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <string.h>
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#include "uio.h"
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// get UIO devices and put into structure
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int uio_getprussfile(char *devname)
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{
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DIR *d;
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struct dirent *dent;
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char fn[UIO_MAX_UIO_FILEPATH];
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FILE *fd;
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char s_name[UIO_MAX_DEV_NAME];
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// clear user buffer
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devname[0] = 0;
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// open directory /dev and scan for uio* files
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d = opendir("/dev");
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// read in first entry
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dent = readdir(d);
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// scan the entries
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while (dent != NULL) {
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// determine if this is a uio* file
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if (dent->d_name[0] == 'u' && dent->d_name[1] == 'i' && dent->d_name[2] == 'o' && devname[0] == 0) {
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// get uio device name and version
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sprintf(fn, "/sys/class/uio/%s/name", dent->d_name);
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fd = fopen (fn, "r");
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fgets(s_name, UIO_MAX_DEV_NAME, fd);
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s_name[strlen(s_name)-1] = 0;
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if (!strncmp(s_name, "pruss", 5)) {
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sprintf(devname, "/dev/%s", dent->d_name);
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}
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fclose(fd);
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}
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// read next directory entry
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dent = readdir(d);
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}
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// close directory handle
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closedir(d);
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return 0;
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}
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