Comments on: USB Host Shield in store.

By: oleg

oleg — Wed, 25 May 2011 13:03:59 +0000

The schematic is here -> http://www.circuitsathome.com/chome_downloads/USBhostShield_12.pdf The difference between simple and minimal is a pair of level shifters and some jumpers. Take a look at hardware manual page -> http://www.circuitsathome.com/usb-host-shield-hardware-manual , legacy “simple” and “minimal” are very similar to 2.0 “standard” and “3.3V”. What you need is to solder level shift ICs, open jumpers which are placed around them and add connection from Arduino 5V pin to the shield. If you want to pursue this and have more questions, contact me off-list at mazurov at circuitsathome dot com

By: thomas

thomas — Wed, 25 May 2011 06:11:01 +0000

Yes, i ordered from a swiss distributor. I already solded the conectors on it and I’m not shure if i can give it back.

By: oleg

oleg — Tue, 24 May 2011 19:07:07 +0000

If I’m reading this correctly, you ordered standard version and received minimal instead. Is this correct?

By: Thomas

Thomas — Tue, 24 May 2011 18:58:09 +0000

Hi,
Unfortunately I received a USB Host Schield rev1.21 version minimal instead a version simple.
I would like to connect a device with 5V on VBUS, like a DSLR Camera.
Can I change the minimal to a 5V version on VBUS and if yes which are the changes? Or where can I find the schematics with the different versions?
I use a Arduino UNO

Thanks for help

By: Collin

Collin — Tue, 05 Oct 2010 06:11:07 +0000

Good news – I’m now able to retrieve MIDI data, via inTransfer, but the code seems to be restarting after each loop (running setup, indicated by printing “Start” to serial monitor)

Is there any particular reason this would occur?

Thanks again!

By: Collin

Collin — Mon, 04 Oct 2010 08:14:29 +0000

I have looked at it and was confused by the multiple layers of terminology used. I’ll go back and attempt to understand it more.

By experimenting with your shield, I learned much in such a short amount of time and I may have become a bit overeager/impatient to implement USB-MIDI

By: oleg

oleg — Sun, 03 Oct 2010 07:29:33 +0000

There is USB MIDI spec on usb.org – have you looked at it yet? Linux sources have plenty of information also.

By: Collin

Collin — Sun, 03 Oct 2010 07:14:54 +0000

Thanks for the all the useful info on this site – I’ve learned a lot!

I’m also trying to get the USB Host Shield working with USB-MIDI. I’m pretty sure all I need to do to acquire incoming MIDI messages is parse the contents of Control Transfer data packet – still unsure of how to implement such an action though. The relevant data seems to be sent as Bulk via a ‘Pipe’ from the device.

Any pointers/tips would be much appreciated.
Thanks again!

By: Jeremy

Jeremy — Wed, 22 Sep 2010 23:20:50 +0000

Hi Oleg,

This is great. Any tips on working with a USB GSM Modem? I’ve got a HUAWEI E160 and am familiar with the AT Commands I’ll need, but am having trouble using your code to send and receive commands. Do you know if anyone else has had success using this with a modem/phone?

Cheers,
Jeremy

By: oleg

oleg — Mon, 05 Apr 2010 02:48:00 +0000

It will, but you need to write the code. Otherwise, take a look at Black Widow at asynclabs.com