Mouse and Keyboard not responding with USB OTG

Are you using the FMC carrier and stock SD card?  Are you plugging it into the OTG port (not the UART port)?  I assume you're using a Micro USB to USB-A adapter, plus a USB hub to plug both the KB and mouse?

Have you tried plugging just the mouse into the adapter, and if so, does the mouse light up (assuming an optical mouse)?  That would confirm that you have power and that the controller knows that it should be in host mode.

I personally haven't had any problems using OTG on the FMC or my custom carrier using any of the stock SD card images.

Pat

All good suggestions - thanks Pat.

Another question - are you successfully booting Linux?

/Matt

Pat,

1) Yes I am using the FMC carrier and stock SD card?

2) Yes I am plugging into the OTG port.

3) Yes I am using a Micro USB to USB-A adapter, plus a USB hub to plug both the KB and mouse.

4) The only way I am able to get the mouse to light up is when the USB hub is connected.

5) How do I know that the controller knows that it is in host mode?

Craig

Pat,

I am successfully booting Linux.

Craig

Just to confirm, you're using a Micro USB to USB A female (OTG host dongle)... not a Micro USB to USB A Male (standard Micro USB cable, like you'd charge a phone with), right?

I just saw this post: http://zedboard.org/content/picozed-sdr-development-kit-startup-problem , where the user was having a similar problem, caused by the incorrect cable.

Pat

Pat,

I am using https://www.amazon.com/Adapter-Samusung-Android-Windows-Function/dp/B00LN3LQKQ

Craig

UGREEN Micro USB 2.0 OTG Cable On The Go Adapter Male Micro USB to Female USB for Samusung S7 S6 Edge S4 S3 Android or Windows Smart Phones Tablets with OTG Function 6 Inch

Hi Craig -- were you able to get things working yet?

/Matt

That cable should work, though of course it's possible to have a defective cable.  If your mouse doesn't light up when plugged directly into the port using the OTG cable, I'd say either the cable is bad (isn't grounding the ID pin to tell it to be a host, bad contacts, broken wire, etc), or there's something messed up with your SOM/carrier (not seeing the ID pin, not turning on 5V, etc).  There's probably a way to echo the OTG state from Linux, but I'm not sure exactly how.

Personally, I'd try another cable, or try that cable on a newer Android tablet or phone with a USB flash drive plugged in, and see if it detects it (which would tell you that the cable is good).

Pat

Hi all,

I seem to have the same problem as Craig, has anyone found a solution to this?

If I connect a mouse directly to the board using a Micro USB type B to USB-A adapter the mouse works. Same if I connect a keyboard using the adapter to the board, keyboard works fine.

The problem is if I connect a USB hub using the Micro USB type B to USB-A adapter to the board. The mouse and keyboard plugged in to the hub do not work. 

I have tried two different makes of hub, same results.

John 

Just to be clear, you're plugging the USB hub into the same Micro USB to USB A socket that you plugged the USB mouse into, right?  You can't use a Micro USB to USB A cable (like a phone charger style cable) to plug the board into a hub.

You have to use a Micro USB OTG host dongle (like: https://www.amazon.com/Wblue-Adapter-Function-Samsung-BlackBerry/dp/B00Y2OTR72/ ), and then plug the USB hub into that cable, and then the USB keyboard and mouse into the hub.  If the PicoZed SDR is working fine when you plug the mouse and keyboard in directly, I'd say you either have the hub hooked up wrong, have defective hubs, or possibly need a hub that's powered externally (though the PicoZed SDR should be able to handle the current of the hub, KB, and mouse).  I've personally used a few different hubs and haven't had any issues with any of them.

Pat