[ts-7000] USB on TS-Linux. TS-7260

["zplovanic" <>]

I am attempting to use libusb in order to work with a usb device (an
Ocean Optics HR2000 Spectrometer) on a TS-7260 board.   I have some
code that should initialize the usb busses and find the correct device
but it does not work in the TS-Linux.  The following is that code:

/* test the usb bus structure using libusb */
#include<stdio.h>
#include<usb.h>

main (int argc, char *argv) {
  struct usb_bus *bus;
  int c, i, a;

  struct usb_bus *busses;

  usb_init();
  usb_find_busses();
  printf("number of devices = %d\n",usb_find_devices());

  busses = usb_get_busses();

  for (bus = busses; bus; bus = bus->next) {
    struct usb_device *dev;
    for (dev = bus->devices; dev; dev = dev->next) {
      printf("device vendor id = 0x%x\n",
             dev->descriptor.idVendor);
      printf("device product id = 0x%x\n",
             dev->descriptor.idProduct);
     }
  }
}

This code, however, always returns: 
number of devices = 0

I run this after running the loadUSBModules.sh which loads 

 insmod usbcore
 insmod pcipool
 insmod usb-ohci
 insmod usb-ohci-ep93xx
 insmod scsi_mod
 insmod sd_mod
 insmod usb-storage;
 
and it still finds no usb devices. 

However after running the loadUSB.sh which contains:

 mount  /dev/scsi/host0/bus0/target0/lun0/part1 /mnt/cf
 mount -t devfs devfs /mnt/cf/dev
 chroot /mnt/cf /etc/init.d/rcS.USB 

 for I in /proc/[0-9]*; do
        ls -al $I/root;
 done | grep '/mnt/cf' | cut -d'/' -f3 | xargs kill -9
 umount /mnt/cf/proc/bus/usb /mnt/cf/dev/pts /mnt/cf/proc /mnt/cf/dev   
  /mnt/cf
 /etc/init.d/network start

which I guess changes root over to the usb drive, I can then run the
code from there and it will correctly find the usb devices:

 number of devices = 3
 device vendor id = 0x0
 device product id = 0x0
 device vendor id = 0x2457
 device product id = 0x1002
 device vendor id = 0x13fe
 device product id = 0x1d00

Sorry for the lengthy message, but does anyone have any clue about
what is going on, or how I might go about figuring out what is going
on?  Bear with me if I do or have done anything stupid, as I am quite
new with ARM boards (and Linux in general).   Any help is greatly
appreciated.

Thanks, 
Zach




 
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