Re: [Libusb-devel] libusbdotnet and FreeBSD 9.0 libusb-1.0 wrapper

[Hans P. S. <hse...@c2...>]

On Sunday 22 April 2012 10:01:04 Xiaofan Chen wrote:
> On Sun, Apr 22, 2012 at 2:36 PM, Hans Petter Selasky <hse...@c2...> 
wrote:
> > On Sunday 22 April 2012 05:29:46 Xiaofan Chen wrote:
> >> ~/Desktop/build/LibUsbDotNet_Bin_2.2.8]$ sudo mono BenchmarkCon.exe list
> >> LibUsbDotNet USB Benchmark v2.2.8.104

> $ lsusb
> Bus /dev/usb Device /dev/ugen0.2: ID 04d8:fa2e Microchip Technology, Inc.
> $ ls -la /dev/usb/0.2.0
> crw-------  1 mcuee  operator    0,  85 Apr 22 15:49 /dev/usb/0.2.0
> 
> $ mono BenchmarkCon.exe list
> LibUsbDotNet USB Benchmark v2.2.8.104
> Copyright (c) 2010 Travis Robinson. <lib...@gm...>
> website: http://sourceforge.net/projects/libusbdotnet
> 1. 04D8:FA2E Travis Robinson - Benchmark Device
> 
> Select device (1-1) :1
> 
> err:setting bechmark test type #TestTypeLoop!
> MonoApiError:ControlTransfer Failed
> -2:ErrorInvalidParam:Invalid parameter
> Press any key to exit..

Hi,

I believe it is a bug in the framework. There are two reasons for invalid 
parameter on a control transfer:

int
libusb_control_transfer(libusb_device_handle *devh,
    uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
    uint8_t *data, uint16_t wLength, unsigned int timeout)

        if (devh == NULL)
                return (LIBUSB_ERROR_INVALID_PARAM);

        if ((wLength != 0) && (data == NULL))
                return (LIBUSB_ERROR_INVALID_PARAM);

--HPS