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Forum Index : Microcontroller and PC projects : Picomite USBHDMI

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Gadgetguy
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Joined: 26/04/2025
Location: France
Posts: 47
Posted: 09:45am 16 May 2025
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Hello all, just got my Picomite (reference design) from Phil (thank you Phil for the great communication and very smooth transaction!)

Finally I have an actual device in hand :) (with the Maximite Color on its way from NZ to France and Picocalc not event sent yet - on that one there is a wait with a couple hundred purchases ahead of me).

I really like it - and I have two questions.

1. I was under the impression that the Picomite is compatible with wireless keyboards.

I tried my Logitech K400, several no name made in china wireless keyboards (they are all keyboard / mouse combos) - and none of them works.

The only one that does work is a keyboard only unit (no mouse or trackpad).

Is that to be expected? The logitech works on the Maximite Color - and that is a simpler USB hardware (if I understand correctly), how come it does not work on the Picomite?

2. As the power button is quite of hard to access between the HDMI cable and the USB C cable, I prefer to switch on / off via a switch on my USB power supply. Is that safe to do or may it hurt the device in any way?

Thank you for your help / guidance!
Edited 2025-05-16 19:48 by Gadgetguy
 
disco4now

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Joined: 18/12/2014
Location: Australia
Posts: 977
Posted: 10:43am 16 May 2025
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My Logitec K400+ works OK.
Connects Keyboard and Mouse.

Try
OPTION RESET HDMIUSB
Latest F4 Latest H7 FotS
 
dddns
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Joined: 20/09/2024
Location: Germany
Posts: 339
Posted: 10:50am 16 May 2025
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this seems to work too. I've tried a 2,4Ghz mouse and had no success either.
@stan would you please confirm for a actual RC if its still true
Edited 2025-05-16 20:55 by dddns
 
dddns
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Posted: 10:59am 16 May 2025
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BTW @Gadetguy, this could be the base for a homebrew handheld
and here and here

With a wireless keyboard it could look like a switch
Edited 2025-05-16 21:18 by dddns
 
Gadgetguy
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Joined: 26/04/2025
Location: France
Posts: 47
Posted: 11:12am 16 May 2025
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This is getting worse - I must be doing something very wrong here. Updated the firmware to the RC23 version (USBHDMI) - and now I do not have a picture on my monitor. But I see on the terminal "US USB Keyboard connected on channel 1" with my logitech keyboard - I did not have this before.
But I am not sure how to see if it works or not, as my monitor does not work (and on the terminal I do not see if the USB keyboard works or not).
Edited 2025-05-16 21:20 by Gadgetguy
 
dddns
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Posted: 11:22am 16 May 2025
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If you see it in a tty session then it should work in this from then on
Mouse too with all features (at least positioning the cursor in the editor)
Edited 2025-05-16 21:31 by dddns
 
Gadgetguy
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Posts: 47
Posted: 11:33am 16 May 2025
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  dddns said  If you see it in a tty session then it should work in this from then on
Mouse too with all features (at least positioning the cursor in the editor)


Thank you. I hope so. But now my HDMI out has stopped. No image on my monitor whatsoever...
 
dddns
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Posted: 11:36am 16 May 2025
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can you connect over serial? options? lower freq by different mode?

Did you change something since it last worked?
Edited 2025-05-16 21:38 by dddns
 
Gadgetguy
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Joined: 26/04/2025
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Posts: 47
Posted: 11:42am 16 May 2025
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  dddns said  can you connect over serial? options? lower freq by different mode?

Did you change something since it last worked?


No, did not change anything. But I looked now on the "options" preset by Phil. He had "HDMI PINS 1, 3, 5, 7"
I did not have this. So I entered it - and now HDMI works.
 
dddns
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Posted: 11:44am 16 May 2025
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:)
 
Gadgetguy
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Joined: 26/04/2025
Location: France
Posts: 47
Posted: 11:47am 16 May 2025
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There is progress. HDMI is back and I see USB Keyboard connected - but when I type on the keyboard it does not show on the screen. Are there any options to configure the keyboard? (if I plug the keyboard receiver in my laptop it works)
 
Gadgetguy
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Joined: 26/04/2025
Location: France
Posts: 47
Posted: 11:53am 16 May 2025
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This is really weird. The Logitech keyboard gets detected and does not work. Then I connect my other keyboard (which did work before). It still works, but I see Keyboard connected and Mouse connected - but there is no mouse?
 
dddns
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Posted: 11:53am 16 May 2025
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doesn't look too good at first sight. I don't know. Try with a non hdmi version and clear the flash first

IIRC I had exactly the same. I saw it connecting being happy and a second later I saw it not working
Edited 2025-05-16 21:56 by dddns
 
Gadgetguy
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Joined: 26/04/2025
Location: France
Posts: 47
Posted: 12:05pm 16 May 2025
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Thank you for trying to help. I started to enter some more options. After I enabled PSRam, now the keyboard and the mouse (logitech) is detected, but still does not work

Phil had something like OPTION PLATFORM HDMIUSB2S -> I try that option and it does not work - I get "expected a string"

I am lost
 
dddns
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Joined: 20/09/2024
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Posts: 339
Posted: 12:12pm 16 May 2025
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  Gadgetguy said  Thank you for trying to help. I started to enter some more options. After I enabled PSRam, now the keyboard and the mouse (logitech) is detected, but still does not work

Phil had something like OPTION PLATFORM HDMIUSB2S -> I try that option and it does not work - I get "expected a string"

I am lost


Tried the answer from @disco4now ?
 
Gadgetguy
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Joined: 26/04/2025
Location: France
Posts: 47
Posted: 12:18pm 16 May 2025
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Yes, did that many times. I also did OPTION RESET HDMIUSBi2S -> that gives me immediately HDMI back, but my keyboard is not detected again, and of course does not work.

If I enter now OPTION PSRAM PIN GP47 -> my keyboard is now detected (but not the mouse and does not work)
Edited 2025-05-16 22:26 by Gadgetguy
 
Bleep
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Joined: 09/01/2022
Location: United Kingdom
Posts: 582
Posted: 12:22pm 16 May 2025
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  Gadgetguy said  Thank you for trying to help. I started to enter some more options. After I enabled PSRam, now the keyboard and the mouse (logitech) is detected, but still does not work

Phil had something like OPTION PLATFORM HDMIUSB2S -> I try that option and it does not work - I get "expected a string"

I am lost


OPTION RESET HDMIUSB
or
OPTION RESET HDMIUSBI2S
 
Gadgetguy
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Joined: 26/04/2025
Location: France
Posts: 47
Posted: 12:27pm 16 May 2025
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  Bleep said  
  Gadgetguy said  Thank you for trying to help. I started to enter some more options. After I enabled PSRam, now the keyboard and the mouse (logitech) is detected, but still does not work

Phil had something like OPTION PLATFORM HDMIUSB2S -> I try that option and it does not work - I get "expected a string"

I am lost


OPTION RESET HDMIUSB
or
OPTION RESET HDMIUSBI2S


Thank you. Yes, I think I need RESET HDMIUSBI2S - then I enable PSRAM PIN47 so keyboard is visible (on channel 1); but mouse is not visible and neither keyboard nor mouse work

For others this seems to work - but I am not sure why
 
Gadgetguy
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Joined: 26/04/2025
Location: France
Posts: 47
Posted: 12:31pm 16 May 2025
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After doing
> option keyboard us, 0, 0, 600, 50

I see:

Total of 6 Mbytes PSRAM available
> US USB Keyboard Connected on channel 1
> USB Mouse Connected on channel 2

So both keyboard and mouse are detected, but neither works
 
Gadgetguy
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Joined: 26/04/2025
Location: France
Posts: 47
Posted: 12:36pm 16 May 2025
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And one more update: it DOES work - but not really. If I press the keys 50 times - maybe it registers once. So I am mashing now the keys and something is visible on the screen, but it is totally useless as I see no way to control what is happening on the screen ( and again - my other keyboard, also wireless -works well!)

Now I did a reset - and only the keyboard is visible on the logitech, the mouse part not (it is the same plug that does both)

There is likely a timing issue somewhere I would speculate - but I really do not know
Edited 2025-05-16 22:38 by Gadgetguy
 
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