Re: usb_bulk_read return -22

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Hi All
I made mistake on claim usb interface
{
    int state =3D usb_set_configuration(*deviceHandle, configurationValue);
    return state<0? usb_claim_interface(*deviceHandle, interfaceid):state;
}
fixed, bulk_read works fine


On Wed, 1 Apr 2020 at 17:28, Ze Hou Zhang <[email protected]> wrote:

> Hi All
> I dont have a lot experience for developping embedded system.
> I encounter this problem
> My hardware is :
>         int vid =3D 0x24aa;
>         int pid =3D 0x1000;
>         std::string firmwarePartNum =3D "170003";
>         std::string firmwareDesc =3D "FX2 USB Board";
>         bool isSupported;
>         unsigned int defaultPixels =3D 1024;
>         unsigned int spectraBlockSize =3D 1024 * 2;
>         unsigned int usbDelayMS =3D 0;
>         bool hasDefaultTECSetpointDegC =3D false;
>         int defaultTECSetpointDegC =3D 0;
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>            int size =3D 512;
>             char* buf =3D new char[size];
>             int endpoint =3D 130;
>             int timeout =3D 150;
>
>             int isok =3D usb_bulk_read(*deviceHandle, endpoint, bytes, si=
ze,
> timeout);
>
>            Output:  ok =3D -22
> Thanks
>

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<div dir=3D"ltr">Hi All=C2=A0<div>I made mistake on claim usb interface</di=
v><div>{</div><div>=C2=A0 =C2=A0 int state =3D usb_set_configuration(*devic=
eHandle, configurationValue);<br>=C2=A0 =C2=A0 return state&lt;0?

 usb_claim_interface(*deviceHandle, interfaceid):state;</div><div>}</div><d=
iv>fixed, bulk_read works fine<br><br></div></div><br><div class=3D"gmail_q=
uote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, 1 Apr 2020 at 17:28, Ze=
 Hou Zhang &lt;<a href=3D"mailto:[email protected]">[email protected].=
ie</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margi=
n:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex=
"><div dir=3D"ltr">Hi All<div>I dont=C2=A0have a lot experience for develop=
ping=C2=A0embedded=C2=A0system.</div><div>I encounter this problem</div><di=
v>My hardware is :</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 int vid =3D 0x24aa=
;</div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 int pid =3D 0x1000;<br>=C2=A0 =C2=A0 =C2=
=A0 =C2=A0 std::string firmwarePartNum =3D &quot;170003&quot;;<br>=C2=A0 =
=C2=A0 =C2=A0 =C2=A0 std::string firmwareDesc =3D &quot;FX2 USB Board&quot;=
;<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 bool isSupported;<br>=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 unsigned int defaultPixels =3D 1024;<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
unsigned int spectraBlockSize =3D 1024 * 2;<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
unsigned int usbDelayMS =3D 0;<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 bool hasDefau=
ltTECSetpointDegC =3D false;<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 int defaultTECS=
etpointDegC =3D 0;<div>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br><div>=C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0int size =3D 512;<br>=C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0 =C2=A0 char* buf =3D new char[size];<br>=C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0 =C2=A0 int endpoint =3D 130;<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 int timeout =3D 150;<br><br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 int isok =3D usb_bulk_read(*deviceHandle, endpoint, bytes, size,=
 timeout);<br></div><div><br></div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0Output:=C2=A0 ok =3D -22=C2=A0<br>Thanks</div></div></div>
</blockquote></div>

<br>
<pre style=3D"background-color:rgb(255,255,255)"><i style=3D"color:rgb(146,=
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ize:10px"><p style=3D"font-style:normal;font-family:verdana,arial,helvetica=
,sans-serif;display:inline"><strong>S=C3=A9anadh R=C3=ADomhphoist/</strong>=
</p></i><i style=3D"color:rgb(146,146,146);font-family:verdana;font-size:10=
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