Re: usb_bulk_read return -22

--===============5281412028435347450==
Content-Type: multipart/alternative; boundary="00000000000003a24605a2b1752a"

--00000000000003a24605a2b1752a
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

Hi Xiaofan
I open and received device handler, and be able to use usb_control_msg to
send and receive data.  also checked device interface endpoints, but I
can=E2=80=99t use usb_bulk_read to read big buffer from device which suppos=
ed to be
ready
Thanks

On Fri 3 Apr 2020 at 03:28, Xiaofan Chen <[email protected]> wrote:

> On Thu, Apr 2, 2020 at 1:00 AM 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,
> size, timeout);
> >
> >            Output:  ok =3D -22
> > Thanks
> >
>
> You have to know the communication protocol of the device in order
> to use libusb-win32. In your case, you need to make sure your device
> is sending data.
>
>
> --
> Xiaofan
>
>
> _______________________________________________
> Libusb-win32-devel mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel
>

--=20
__

S=C3=A9anadh R=C3=ADomhphoist/_

Email=C2=A0Disclaimer__
**

T=C3=A1 an r=C3=ADomhphost seo agus=20
aon chomhad a sheoltar leis faoi r=C3=BAn agus is lena =C3=BAs=C3=A1id ag a=
n seola=C3=AD agus=20
sin amh=C3=A1in =C3=A9.=C2=A0Is f=C3=A9idir tuilleadh a l=C3=A9amh anseo.=
=20
<https://www4.dcu.ie/iss/seanadh-riomhphoist.shtml>=C2=A0=20
<https://www4.dcu.ie/iss/seanadh-riomhphoist.shtml>*
_

This e-mail and any=20
files transmitted with it are confidential and are intended solely for use=
=20
by the addressee.=C2=A0Read more here.=20
<https://www4.dcu.ie/iss/email-disclaimer.shtml>=C2=A0_
*_

--00000000000003a24605a2b1752a
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div><br></div><div><div dir=3D"auto">Hi Xiaofan</div><div dir=3D"auto">I o=
pen and received device handler, and be able to use usb_control_msg to send=
 and receive data. =C2=A0also checked device interface endpoints, but I can=
=E2=80=99t use usb_bulk_read to read big buffer from device which supposed =
to be ready</div><div dir=3D"auto">Thanks</div><br><div class=3D"gmail_quot=
e"><div dir=3D"ltr" class=3D"gmail_attr">On Fri 3 Apr 2020 at 03:28, Xiaofa=
n Chen &lt;<a href=3D"mailto:[email protected]">[email protected]</a>&gt;=
 wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8=
ex;border-left:1px #ccc solid;padding-left:1ex">On Thu, Apr 2, 2020 at 1:00=
 AM Ze Hou Zhang &lt;<a href=3D"mailto:[email protected]" target=3D"_bl=
ank">[email protected]</a>&gt; wrote:<br>
&gt;<br>
&gt; Hi All<br>
&gt; I dont have a lot experience for developping embedded system.<br>
&gt; I encounter this problem<br>
&gt; My hardware is :<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0int vid =3D 0x24aa;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0int pid =3D 0x1000;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0std::string firmwarePartNum =3D &quot=
;170003&quot;;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0std::string firmwareDesc =3D &quot;FX=
2 USB Board&quot;;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0bool isSupported;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0unsigned int defaultPixels =3D 1024;<=
br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0unsigned int spectraBlockSize =3D 102=
4 * 2;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0unsigned int usbDelayMS =3D 0;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0bool hasDefaultTECSetpointDegC =3D fa=
lse;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0int defaultTECSetpointDegC =3D 0;<br>
&gt; =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>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 int size =3D 512;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0char* buf =3D new char[=
size];<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0int endpoint =3D 130;<b=
r>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0int timeout =3D 150;<br=
>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0int isok =3D usb_bulk_r=
ead(*deviceHandle, endpoint, bytes, size, timeout);<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Output:=C2=A0 ok =3D -22<br>
&gt; Thanks<br>
&gt;<br>
<br>
You have to know the communication protocol of the device in order<br>
to use libusb-win32. In your case, you need to make sure your device<br>
is sending data.<br>
<br>
<br>
-- <br>
Xiaofan<br>
<br>
<br>
_______________________________________________<br>
Libusb-win32-devel mailing list<br>
<a href=3D"mailto:[email protected]" target=3D"_blan=
k">[email protected]</a><br>
<a href=3D"https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel"=
 rel=3D"noreferrer" target=3D"_blank">https://lists.sourceforge.net/lists/l=
istinfo/libusb-win32-devel</a><br>
</blockquote></div></div>

<br>
<pre style=3D"background-color:rgb(255,255,255)"><i style=3D"color:rgb(146,=
146,146);font-family:Verdana;white-space:normal;font-size:10px"><div style=
=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-=
style:normal"><i style=3D"color:rgb(146,146,146);font-family:verdana;font-s=
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=
px"><p style=3D"font-style:normal;font-family:verdana,arial,helvetica,sans-=
serif;display:inline"><strong>Email=C2=A0Disclaimer</strong></p></i></div><=
pre style=3D"white-space:pre-wrap;color:rgb(34,34,34);font-style:normal"><i=
><div style=3D"font-family:arial,sans-serif;font-style:normal;white-space:n=
ormal"><pre style=3D"white-space:pre-wrap"><i><p style=3D"display:inline"><=
span style=3D"color:rgb(146,146,146);font-family:verdana,arial,helvetica,sa=
ns-serif;white-space:normal">T=C3=A1 an r=C3=ADomhphost seo agus aon chomha=
d a sheoltar leis faoi r=C3=BAn agus is lena =C3=BAs=C3=A1id ag an seola=C3=
=AD agus sin amh=C3=A1in =C3=A9.=C2=A0<font color=3D"#1155cc"><a href=3D"ht=
tps://www4.dcu.ie/iss/seanadh-riomhphoist.shtml" target=3D"_blank">Is f=C3=
=A9idir tuilleadh a l=C3=A9amh anseo.</a></font></span><span style=3D"color=
:rgb(146,146,146);font-family:verdana,arial,helvetica,sans-serif;font-style=
:normal;white-space:normal"><a href=3D"https://www4.dcu.ie/iss/seanadh-riom=
hphoist.shtml" target=3D"_blank">=C2=A0</a></span></p></i></pre></div><div =
style=3D"font-family:arial,sans-serif;font-style:normal;white-space:normal"=
><i style=3D"white-space:pre-wrap"><p style=3D"color:rgb(146,146,146);font-=
family:verdana,arial,helvetica,sans-serif;white-space:normal;font-style:nor=
mal;display:inline"><em>This e-mail and any files transmitted with it are c=
onfidential and are intended solely for use by the addressee.=C2=A0<font co=
lor=3D"#1155cc"><a href=3D"https://www4.dcu.ie/iss/email-disclaimer.shtml" =
target=3D"_blank">Read more here.</a></font>=C2=A0</em></p></i></div></i></=
pre></i></pre>
--00000000000003a24605a2b1752a--


--===============5281412028435347450==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline


--===============5281412028435347450==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

_______________________________________________
Libusb-win32-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel

--===============5281412028435347450==--