[Libusb-devel] usb_bulk_read not working with iRiverH10 device under uClinux

[Isabella <Isa...@ja...>]

Hi,

    I have developed MTP initiator PFD device using libusb version 0.1.12.
This code is woking fine with iRiverH10 ver2.51 and NetChip NET2280EVB MTP
responder device under Suse10.1 with kernel version 2.6.16.13.4. The same
code working fine with NetChip NET2280EVB MTP responder device under uClinux
kernel version 2.6.19.3-ADI-2007R1-svn. But not working with iRiverH10
ver2.51 device. Means usb_bulk_read is working only very first time. from
second time onwards  i am getting timeout or ret value is zerofor
usb_bulk_read  operation.

What might be the problem? your help would be more appreciated.

Following is the output  of both devices.
1.with iRiverDevice

Connected to MTP device.

Autodetected device with VID=4102 and PID=2102 is UNKNOWN.



usb_claim_interface Success

BulkInAddress----------------->82

BulkInMaxSize----------------->200

BulkInInterval----------------->0



BulkOutAddress----------------->1

BulkOutMaxSize----------------->200

BulkOutInterval----------------->0



InterruptAddress----------------->81

InterruptMaxSize----------------->200

InterruptInterval----------------->64



PipeCount----------------->3



USB Connection Established. And Device is identified as MTP device

LCD_DISPLAY : USB Connection Established. And Device is identified as MTP
device

 *************handler_OpenSession**********



usb_bulk_read ul NumBytesToRead :  512

usb_bulk_read ret :  12

0c,00,00,00,03,00,01,20,00,00,00,00,



USB Header: Len         = 12

USB Header: Type        = 3

USB Header: Code        = 2001

USB Header: Transaction = 0

Session 1 opened



 *************handler_CloseSession**********

usb_bulk_read ul NumBytesToRead :  512

usb_bulk_read ret :  -110



2.NetChip NET2280EVB device


Connected to MTP device.
Autodetected device with VID=041e and PID=4130 is UNKNOWN.

usb_claim_interface Success

BulkInAddress----------------->81
BulkInMaxSize----------------->200
BulkInInterval----------------->0

BulkOutAddress----------------->1
BulkOutMaxSize----------------->200
BulkOutInterval----------------->0

InterruptAddress----------------->82
InterruptMaxSize----------------->40
InterruptInterval----------------->10

PipeCount----------------->3
USB Connection Established. And Device is identified as MTP device
LCD_DISPLAY : USB Connection Established. And Device is identified as MTP
device
*************handler_OpenSession**********


usb_bulk_read ulNumBytesToRead :  512

usb_bulk_read ret :  12
0c,00,00,00,03,00,01,20,00,00,00,00,


USB Header: Len         = 12
USB Header: Type        = 3
USB Header: Code        = 2001
USB Header: Transaction = 0

Session 1 opened

*************handler_CloseSession**********
usb_bulk_read ulNumBytesToRead :  512

usb_bulk_read ret :  12
0c,00,00,00,03,00,01,20,01,00,00,00,

USB Header: Len         = 12
USB Header: Type        = 3
USB Header: Code        = 2001
USB Header: Transaction = 1

Session closed
MTP device closed.
USB Connection detatched from the MTP ResponderDevice
LCD_DISPLAY : USB Connection detatched from the MTP ResponderDevice

Thanks and Regards,
Isabella.S