usb_bulk_read return -22

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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, size=
,
timeout);

           Output:  ok =3D -22
Thanks

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<div dir=3D"ltr">Hi All<div>I dont=C2=A0have a lot experience for developpi=
ng=C2=A0embedded=C2=A0system.</div><div>I encounter this problem</div><div>=
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>

<br>
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,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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