/* change by Xiaofan */ 
/* to detach the kernel driver if it is
calimed by some newer kernel ldusb module.
http://www.opensubscriber.com/message/linux-usb-devel@lists.sourceforge.net/7160138.html
*/
#ifdef LINUX

{

int retval;

char dname[32] = {0};

retval = usb_get_driver_np(d, 0, dname, 31);

if (!retval)

usb_detach_kernel_driver_np(d, 0);

}

#endif

# This file is part of fsusb_demo

#

# fsusb_demo is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# fsusb_demo is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with fsusb_picdem; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

# 02110-1301, USA


# For Windows, please put usb.h and MingW version of libusb.a into
# the MingW include and lib directory respectively.
# For Linux only
LIBUSB = /usr/lib


OPTS=-Wall -D_GNU_SOURCE -DLINUX

OBJS=fsusb_demo.o



CFLAGS=$(OPTS) -I$(LIBUSB)/include

LDFLAGS=-L$(LIBUSB)/lib -lusb



# Needed for static linking under OS X:

# LDFLAGS=-lusb -lIOKit -framework CoreFoundation



all: fsusb_demo



fsusb_demo: $(OBJS)

	$(CC) $(CFLAGS) -o $@ $(OBJS) $(LDFLAGS)



clean:

	-rm fsusb_demo *.o

quote:

ORIGINAL: xiaofan
Try to use my version of fsusb_demo.c and see how it goes. You may want to change usb_bulk to usb_interrupt as shown below.

/** Send this binary string command. */
static void send_usb(struct usb_dev_handle * d, int len, const char * src)
{
  int r = usb_interrupt_write(d, endpoint_out, (char *)src, len, timeout);
//   if( r != reqLen )
  if( r < 0 )
  {
	  perror("usb PICDEM FS USB write"); bad("USB write failed"); 
  }
}

/** Read this many bytes from this device */
static void recv_usb(struct usb_dev_handle * d, int len, byte * dest)
{
//   int i;
  int r = usb_interrupt_read(d, endpoint_in, dest, len, timeout);
  if( r != len )
  {
	  perror("usb PICDEM FS USB read"); bad("USB read failed"); 
  }
}

/****************** Internal I/O Commands *****************/

/** Send this binary string command. */
static void send_usb(struct usb_dev_handle * d, int len, const char * src)
{
   int r = usb_bulk_write(d, endpoint_out, (char *)src, len, timeout);
//   if( r != reqLen )
   if( r < 0 )
   {
	  perror("usb PICDEM FS USB write"); bad("USB write failed"); 
   }
}

/** Read this many bytes from this device */
static void recv_usb(struct usb_dev_handle * d, int len, byte * dest)
{
//   int i;
   int r = usb_bulk_read(d, endpoint_in, dest, len, timeout);
   if( r != len )
   {
	  perror("usb PICDEM FS USB read"); bad("USB read failed"); 
   }
}

J:\Downloads\USB\libusb-win32-device-bin-0.1.12.1\bin>ver
Microsoft Windows [Version 6.0.6001]

J:\Downloads\USB\libusb-win32-device-bin-0.1.12.1\bin>fsusb_demo.exe --ledon 4
Locating Microchip(tm) PICDEM(tm) FS USB Demo Board (vendor 0x04d8/product 0x000
c)
setting USB debug on by adding usb_set_debug(255)
LIBUSB_DLL: info: usb_os_init: dll version: 0.1.12.1
LIBUSB_DLL: info: usb_os_init: driver version: 0.1.12.1
LIBUSB_DLL: info: usb_os_find_busses: found bus-0
LIBUSB_DLL: info: usb_os_find_devices: found \\.\libusb0-0001--0x04d8-0x000c on
bus-0
Found USB PICDEM FS USB Demo Board as device '\\.\libusb0-0001--0x04d8-0x000c' o
n USB bus bus-0
Communication established.
answer was correct!
Onboard firmware version is 1.0
LED #4 is now on

J:\Downloads\USB\libusb-win32-device-bin-0.1.12.1\bin>testlibusb.exe -v
Dev #1: Microchip Technology Inc. - PICDEM FS USB Demo Board (C) 2004
wTotalLength:         32
bNumInterfaces:       1
bConfigurationValue:  1
iConfiguration:       0
bmAttributes:         80h
MaxPower:             50
 bInterfaceNumber:   0
 bAlternateSetting:  0
 bNumEndpoints:      2
 bInterfaceClass:    0
 bInterfaceSubClass: 0
 bInterfaceProtocol: 0
 iInterface:         0
   bEndpointAddress: 01h
   bmAttributes:     03h
   wMaxPacketSize:   64
   bInterval:        32
   bRefresh:         0
   bSynchAddress:    0
   bEndpointAddress: 81h
   bmAttributes:     03h
   wMaxPacketSize:   64
   bInterval:        32
   bRefresh:         0
   bSynchAddress:    0

INF file generated:
[Version]
Signature = "$Chicago$"
provider  = %manufacturer%
DriverVer = 03/20/2007,0.1.12.1
CatalogFile = picdemfsusb_000c.cat
CatalogFile.NT = picdemfsusb_000c.cat
CatalogFile.NTAMD64 = picdemfsusb_000c_x64.cat
Class = LibUsbDevices
ClassGUID = {EB781AAF-9C70-4523-A5DF-642A87ECA567}
[ClassInstall]
AddReg=libusb_class_install_add_reg
[ClassInstall32]
AddReg=libusb_class_install_add_reg
[libusb_class_install_add_reg]
HKR,,,,"LibUSB-Win32 Devices"
HKR,,Icon,,"-20"
[Manufacturer]
%manufacturer%=Devices,NT,NTAMD64
;--------------------------------------------------------------------------
; Files
;--------------------------------------------------------------------------
[SourceDisksNames]
1 = "Libusb-Win32 Driver Installation Disk",,
[SourceDisksFiles]
libusb0.sys = 1,,
libusb0.dll = 1,,
libusb0_x64.sys = 1,,
libusb0_x64.dll = 1,,
[DestinationDirs]
libusb_files_sys = 10,system32\drivers
libusb_files_sys_x64 = 10,system32\drivers
libusb_files_dll = 10,system32
libusb_files_dll_wow64 = 10,syswow64
libusb_files_dll_x64 = 10,system32
[libusb_files_sys]
libusb0.sys
[libusb_files_sys_x64]
libusb0.sys,libusb0_x64.sys
[libusb_files_dll]
libusb0.dll
[libusb_files_dll_wow64]
libusb0.dll
[libusb_files_dll_x64]
libusb0.dll,libusb0_x64.dll
;--------------------------------------------------------------------------
; Device driver
;--------------------------------------------------------------------------
[LIBUSB_DEV]
CopyFiles = libusb_files_sys, libusb_files_dll
AddReg    = libusb_add_reg
[LIBUSB_DEV.NT]
CopyFiles = libusb_files_sys, libusb_files_dll
[LIBUSB_DEV.NTAMD64]
CopyFiles = libusb_files_sys_x64, libusb_files_dll_wow64, libusb_files_dll_x64
[LIBUSB_DEV.HW]
DelReg = libusb_del_reg_hw
AddReg = libusb_add_reg_hw
[LIBUSB_DEV.NT.HW]
DelReg = libusb_del_reg_hw
AddReg = libusb_add_reg_hw
[LIBUSB_DEV.NTAMD64.HW]
DelReg = libusb_del_reg_hw
AddReg = libusb_add_reg_hw
[LIBUSB_DEV.NT.Services]
AddService = libusb0, 0x00000002, libusb_add_service
[LIBUSB_DEV.NTAMD64.Services]
AddService = libusb0, 0x00000002, libusb_add_service
[libusb_add_reg]
HKR,,DevLoader,,*ntkern
HKR,,NTMPDriver,,libusb0.sys
; Older versions of this .inf file installed filter drivers. They are not
; needed any more and must be removed
[libusb_del_reg_hw]
HKR,,LowerFilters
HKR,,UpperFilters
; Device properties
[libusb_add_reg_hw]
HKR,,SurpriseRemovalOK, 0x00010001, 1
;--------------------------------------------------------------------------
; Services
;--------------------------------------------------------------------------
[libusb_add_service]
DisplayName    = "LibUsb-Win32 - Kernel Driver 03/20/2007, 0.1.12.1"
ServiceType    = 1
StartType      = 3
ErrorControl   = 0
ServiceBinary  = %12%\libusb0.sys
;--------------------------------------------------------------------------
; Devices
;--------------------------------------------------------------------------
[Devices]
"PICDEM FS USB libusb-win32 Device"=LIBUSB_DEV, USB\VID_04d8&PID_000c
[Devices.NT]
"PICDEM FS USB libusb-win32 Device"=LIBUSB_DEV, USB\VID_04d8&PID_000c
[Devices.NTAMD64]
"PICDEM FS USB libusb-win32 Device"=LIBUSB_DEV, USB\VID_04d8&PID_000c

;--------------------------------------------------------------------------
; Strings
;--------------------------------------------------------------------------
[Strings]
manufacturer = "Microchip Technology, Inc."