Home
JAQForum Ver 24.01
Log In or Join  
Active Topics
Local Time 11:49 17 Sep 2025 Privacy Policy
Jump to

Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.

Forum Index : Microcontroller and PC projects : PicoMite usb problem

Author Message
Friday
Newbie

Joined: 25/08/2025
Location: United States
Posts: 6
Posted: 08:20pm 16 Sep 2025
Copy link to clipboard 
Print this post

So I am stuck,

I flashed PicoMiteHDMIUSB (both 6.03 and 6.01) to a pi pico 2w.  The hdmi works perfect.  But the keyboard does not, I have tried 2 different known working usb otg connectors and 2 different keyboards.  Also tried reflashing several times.

Its my understanding the keyboard should just work once plugged in.  

Any ideas what to try next?

Thanks in advance.
 
Pluto
Guru

Joined: 09/06/2017
Location: Finland
Posts: 376
Posted: 08:44pm 16 Sep 2025
Copy link to clipboard 
Print this post

I think you have to introduce your keyboard by using OPTION KEYBOARD. See manual page 92 for details. (PicoMite User Manual, Revision 3, 8 September 2025)

Pluto
 
Friday
Newbie

Joined: 25/08/2025
Location: United States
Posts: 6
Posted: 08:48pm 16 Sep 2025
Copy link to clipboard 
Print this post

I will wire up a serial cable and try to do that, I was confused by the language on page 36

USB Keyboard
When a USB keyboard is connected it will be immediately recognised (no configuration required) and
MMBasic will allocate it to channel 1 by default– there is nothing extra required.

AND

Configuring the Keyboard
By default the keyboard configuration will be assumed to be the standard US layout. However the OPTION
KEYBOARD command can be used to configure layouts for other countries.
The syntax of the command is:
OPTION KEYBOARD language

But I will make a cable and see if I get can get the serial console working.

Thanks.
 
disco4now

Guru

Joined: 18/12/2014
Location: Australia
Posts: 1025
Posted: 10:24pm 16 Sep 2025
Copy link to clipboard 
Print this post

PicoMiteHDMIUSB would be the wrong firmware. This expects a USB HUB to be present on the board.

PicoMiteHDMI firmware with a PS2 keyboard should work.
F4 H7FotSF4xGT
 
Friday
Newbie

Joined: 25/08/2025
Location: United States
Posts: 6
Posted: 10:52pm 16 Sep 2025
Copy link to clipboard 
Print this post

So, the docs are just wrong?

Note that a hub is not required. If you only want to connect one device (for example a keyboard) you can just
plug the device (using an adapter cable) directly into the Pico’s USB connector.

Page 33...
 
phil99

Guru

Joined: 11/02/2018
Location: Australia
Posts: 2713
Posted: 11:12pm 16 Sep 2025
Copy link to clipboard 
Print this post

Also I think for the HDMI/USB version the monitor and USB keyboard are the default console.

Originally the keyboard had to be a "plain vanilla" one. Any extra features would prevent it working. Not sure if this is still the case.

With nothing showing on the HDMI screen, hopefully the serial console is automatically enabled. Otherwise configuring it by blind typing will be needed.
 
Friday
Newbie

Joined: 25/08/2025
Location: United States
Posts: 6
Posted: 12:38am 17 Sep 2025
Copy link to clipboard 
Print this post

The hdmi screen is showing fine, but the keyboard doesnt do anything, caps lock doesnt even light up when hit.

I thought it might be power, running things off a 3.7 volt battery, so I tested giving it 5 volts solid, and same issue.
 
Print this page


To reply to this topic, you need to log in.

The Back Shed's forum code is written, and hosted, in Australia.
© JAQ Software 2025