From: andreas.willig@rafi.de
To: Barebox List <barebox@lists.infradead.org>
Subject: Antwort: USB Host i.Mx6S
Date: Fri, 19 Jun 2015 13:11:28 +0200 [thread overview]
Message-ID: <OFCBE64D2D.49C56E9D-ONC1257E69.003D79AA-C1257E69.003D79B5@o0802.rafi.inhouse> (raw)
In-Reply-To: <OF8A4A9DD7.EAA49236-ONC1257E69.002CEC59-C1257E69.002CEC64@o0802.rafi.inhouse>
Soon after posting, I found the problem myself :)
USB H1 requires to have VBus fead into controller to power the USBPHY. After adding a 0 Ohm resistor on the right place, the D- semi voltage disappears and enumeration works.
Maybe this is helpfull for someone hitting similar problem (even if hardware is slightly off-Topic here)
Mit freundlichen Grüßen aus Berg/ With kind regards
i.A. Andreas Willig
Dipl.-Ing. (FH)
Entwicklung Elektronik
RAFI GmbH & Co. KG
Postfach 2060
88276 Ravensburg
Tel.: +49 (0) 751 89-6142
mailto:andreas.willig@rafi.de, http://www.rafi.de
Kommanditgesellschaft: Sitz Berg, Amtsgericht Ulm, HRA 550059
Komplementär: RAFI Beteiligungs-GmbH, Sitz Berg, Amtsgericht Ulm HRB 550074
Geschäftsführer: Albert Wasmeier, Dipl.-Kfm. Gerhard Schenk
USt-Ident.-Nr.: DE 146 392 319, Steuer-Nr.: 77079/00291
-----"barebox" <barebox-bounces@lists.infradead.org> schrieb: -----
An: Barebox List <barebox@lists.infradead.org>
Von: andreas.willig@rafi.de
Gesendet von: "barebox"
Datum: 19.06.2015 10:11
Betreff: USB Host i.Mx6S
Hi everyone
did anyone get a USB Stick Mass Storage to run, connected to i.MX6 Solo USB H1? I can get it running on OTG Pure Host, but not on USB H1. It runs into a timeout on issuieng GetDescriptor during usb_rescan.
Using a scope i don't see any traffic on D+/D-, what i observe is a drop of D- to 1.3V where i expect 3.3V, which i see on Connection to USB OTG (USB stick is a low Speed device, therefore D- High).
Any ideas? Is there an additional Setting for UTMI/USBPhy required?
Mit freundlichen Grüßen aus Berg/ With kind regards
i.A. Andreas Willig
Dipl.-Ing. (FH)
Entwicklung Elektronik
RAFI GmbH & Co. KG
Postfach 2060
88276 Ravensburg
Tel.: +49 (0) 751 89-6142
mailto:andreas.willig@rafi.de, http://www.rafi.de
Kommanditgesellschaft: Sitz Berg, Amtsgericht Ulm, HRA 550059
Komplementär: RAFI Beteiligungs-GmbH, Sitz Berg, Amtsgericht Ulm HRB 550074
Geschäftsführer: Albert Wasmeier, Dipl.-Kfm. Gerhard Schenk
USt-Ident.-Nr.: DE 146 392 319, Steuer-Nr.: 77079/00291
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prev parent reply other threads:[~2015-06-19 11:12 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-19 8:10 andreas.willig
2015-06-19 11:11 ` andreas.willig [this message]
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