Home
JAQForum Ver 20.06
Log In or Join  
Active Topics
Local Time 19:49 30 Sep 2022 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 HID device

Author Message
pwillard
Senior Member

Joined: 07/06/2022
Location: United States
Posts: 179
Posted: 11:30am 21 Sep 2022
Copy link to clipboard 
Print this post

I'm going to just say it... I know it sounds dumb.

One of the most common devices I see made with the PICO NOT running MMBASIC is making a HID keyboard for things like OBS controls.

I'm assuming that creating this sort of HID-type device is one of the things MMBASIC on a PICO is NOT suited for.  Am I right?
 
lizby
Guru

Joined: 17/05/2016
Location: United States
Posts: 2336
Posted: 12:12pm 21 Sep 2022
Copy link to clipboard 
Print this post

  pwillard said  HID keyboard for things like OBS controls


Links?
PicoMite on fruitoftheshed
 
pwillard
Senior Member

Joined: 07/06/2022
Location: United States
Posts: 179
Posted: 12:26pm 21 Sep 2022
Copy link to clipboard 
Print this post

One of the SIMPLER examples.

Instructable

There is also the KEYBOW2040 which is a fully built 16 Key Keyboard with an onboard 2040

Of course, I can program with Python... but Basic is more fun.
Edited 2022-09-21 22:26 by pwillard
 
JohnS
Guru

Joined: 18/11/2011
Location: United Kingdom
Posts: 2882
Posted: 01:10pm 21 Sep 2022
Copy link to clipboard 
Print this post

Why use USB HID with all its pain for so few keys?

John
 
lew247

Guru

Joined: 23/12/2015
Location: United Kingdom
Posts: 1605
Posted: 03:16pm 21 Sep 2022
Copy link to clipboard 
Print this post

  JohnS said  Why use USB HID with all its pain for so few keys?
John

Because it "just works"
Why fix something that isn't broken
Edit: Obviously I wouldn't for so few keys, but USB just works with almost anything these days, PS2 keyboards do not
Edited 2022-09-22 01:17 by lew247
 
matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 6491
Posted: 03:24pm 21 Sep 2022
Copy link to clipboard 
Print this post

The PicoMite doesn't support HID and won't ever support HID. It has one USB port and that is dedicated to CDC.
 
JohnS
Guru

Joined: 18/11/2011
Location: United Kingdom
Posts: 2882
Posted: 03:28pm 21 Sep 2022
Copy link to clipboard 
Print this post

  lew247 said  
  JohnS said  Why use USB HID with all its pain for so few keys?
John

Because it "just works"

Only with a vast amount of support code / hardware.

The Pico lacks those so struggles and expecting HID as well as CDC is beyond it most likely.  Especially if you want MMBasic as well.

John
 
Mixtel90

Guru

Joined: 05/10/2019
Location: United Kingdom
Posts: 2975
Posted: 05:37pm 21 Sep 2022
Copy link to clipboard 
Print this post

USB is very deceptive. There's a serious amount of hardware and firmware engineering go in to make it "just work". On the other hand, PS2 could hardly be simpler to interface as it's basically I2C.

Like a lot of things, you can make the Pico do them, but not have enough resources left to run MMBasic and have a decent amount of space for the user program.
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
Grogster

Admin Group

Joined: 31/12/2012
Location: New Zealand
Posts: 8238
Posted: 01:05am 22 Sep 2022
Copy link to clipboard 
Print this post

Well said, Mick.  

Especially the USB is very deceptive. There's a serious amount of hardware and firmware engineering go in to make it "just work". bit.  
Smoke makes things work. When the smoke gets out, it stops!
 
bigmik

Guru

Joined: 20/06/2011
Location: Australia
Posts: 2634
Posted: 01:20am 22 Sep 2022
Copy link to clipboard 
Print this post

Hi Pwillard, ALL,

It is not a dumb question.

I read in the latest APC (Australian Personal Computer) Magazine an article for a `Rubber Ducky' that can emulate a keyboard. Sometimes these can be for criminal purposes to take control of a PC or, less nefariously, just be for adding keys/macros as a keyboard.

I have discussed this with my 'partner in crime' AndrewG and we have come up with the following code:

'Rubber Ducky v5.BAS
'
 OPTION EXPLICIT
 OPTION DEFAULT NONE
 option Base 1 'Each array will start with the index 1
 
'OPTION AUTORUN ON 'Issue from console
 
 Dim Integer I, XMax = 320, YMax = 480, T_Ref
 Dim String Caption(8)     'This is what appears on the button the "~" starts a new line
 Dim string Message(8)     'Can be upto 256 characters long
 
'Options for Mick to set:
 Dim Integer PauseTime = 250 'A short delay to prevent multiple sends from the one tap - change to suit
 
'The "~" starts a new line on the button
 Caption(1) = "bigmick58@~bigpond.com"   : Message(1) = "bigmick58@bigpond.com"
 Caption(2) = "Father~Christmas"         : Message(2) = "Father Christmas"
 Caption(3) = "PicoMuP is~Great"         : Message(3) = "PicoMuP is Great"
 Caption(4) = "I love Stout"             : Message(4) = "I love Stout"
 Caption(5) = "40 Bellevue~Blvd~HILLSIDE": Message(5) = "40 Bellevue Blvd HILLSIDE"
 Caption(6) = "0402001620"               : Message(6) = "0402001620"
 Caption(7) = "Andrew~Garrett~Makes Wine"                   : Message(7) = "Andrew Garrett Makes Wine"
 Caption(8) = "I love golf~but golf~HATES me"                   : Message(8) = "I love golf but Golf hates me"
 
 SETPIN GP5, GP4, COM2   'Mick's PicoMuP pins
 
'This assumes your keyboard interface is attached to COM2
 OPEN "COM2:9600" as #2  'Edit the speed to suit
 
 CLS
 Font 2  'MICK NOTE the font change
 
'Column 1:
 For I = 1 to 4
   GUI BUTTON I, Caption(I), 4, (I-1)*2*60+4, XMax/2-6, 2*57-2, RGB(white), RGB(magenta)
 Next I
 
'Column 2:
 For I = 5 to 8
   GUI BUTTON I, Caption(I), 4+XMax/2, (I-1-4)*2*60+4, XMax/2-6, 2*57-2, RGB(yellow), RGB(red)
 Next I
 
 GUI INTERRUPT PenDown   ', PenUp
 GUI Show All
 
'MMMMMMMMMMMMMM Start of Main Loop MMMMMMMMMMMMMMMMMMMMM
 Do
'
'   . . .
'
   Watchdog 10000  'If the program stalls for more than 10 seconds it will re-boot (because you have used the console to set "OPTION AUTORUN ON" - haven't you . . .
   
   If T_Ref > 0 then  'T_Ref = 0 does pop up and causes errors so let's use it
     print #2, Message(T_Ref):print Message(T_Ref)
     If T_Ref <5 then
       Box 0, (T_Ref-1)*2*60, XMax/2, 2*60,, RGB(green)
       pause PauseTime 'insert a short pause to prevent multiple sends from the one tap
       Box 0, (T_Ref-1)*2*60, XMax/2, 2*60,, RGB(black)        'Erase box
     Else
       Box XMax/2, (T_Ref-1-4)*2*60, XMax/2, 2*60,, RGB(green)
       pause PauseTime 'insert a short pause to prevent multiple sends from the one tap
       Box XMax/2, (T_Ref-1-4)*2*60, XMax/2, 2*60,, RGB(black) 'Erase box
     End If
     
     T_Ref = 0 'Use as a flag to only process once per tap
   End If
'
'   . . .
'
 Loop
'mmmmmmmmmmmmm End of Main Loop mmmmmmmmmmmmmmmmmmmmmmmm
 
Sub PenDown
 T_Ref = Touch(Ref)
End Sub 'Pendown
 
Sub PenUp 'This probably won't be used. If not can be deleted.
'   T_Ref = Touch(LastRef) 'Not needed, can delete this line
End Sub 'PenUp
 
 


Now this sets up on a 480 x 320 display (the picture below shows an ILI9481 but an ILI9488 can also be used) as an extra/programmable keypad that sits nicely next to my keyboard.
I simply tap the key I want and it sends a string to a serial port.
Currently I am using the Console serial port but It ultimately will also work using the serial port (and a USB-TTL adapter) to feed strings into a USB (set as a COM port on the PC). This is not currently tested.




Now, I hear you all screaming that getting data into your PC's COM port wont work as a keyboard. Of course you are correct, however I found a neat little Utility called >>> DATASNIP <<< that is a `keyboard wedge' that redirects a COM port into the keyboard buffer.

Datasnip comes as a free to use "basic' version which does work however using the Serial Console at random intervals (usually 30seconds or so) an ESC sequence appears as key presses, [?25h   which I believe is a `Cursor ON' command and is part of the VT100 emulation of MMBasic Console. No other escape sequences appear.

The paid for version at $11AU inc GST or about $6US has some very nice features including a find string and replace it with something (or nothing). I wasn't able to actually get the [?25h  code to be captured but I was able to capture ?25h   ie. no [ character and replace with a backspace to delete the [.

OK, That is a bit of a PitA but in my application it hasn't been an issue for me.
If it was I would simply dedicate a USB-TTL adapter and use the pure COM port from the PicoMite which will have no VT100 emulations. Then the free version of Datasnip could be used.

As Datasnip (the paid version) has 2 programmable keys that can send a string out of the COM port I am currently working on adding a second page of buttons that can be toggled by a `hot' key.

Alright, I hear you saying there are many keyboard wedge programs out there BUT this has the advantage of showing what the key you press is without having to remember what hot key to use and what that hotkey is associated with.

Anyway, it is still a work in progress, Both Andrew and I hope that you will find some use or interest in this.

In my case it also got `rid of' an ILI9481 display that is much slower than the similar ILI9488.

Thank You AndrewG for creating the bulk of the code listed above. And apologies for my feeble additions.

Kind Regards,

Mick

EDIT **

Here is a Picture of the Inside showing one of my PicoMuPs on the display.

The 4 screws are adjusted to hit the bottom of the case and absorb any heavy handed pressing of the touch screen the `hot snot' is simply to stop the screen moving vertically and horizontally.




Mik
Edited 2022-09-22 11:28 by bigmik
Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<<
 
TassyJim

Guru

Joined: 07/08/2011
Location: Australia
Posts: 4892
Posted: 02:01am 22 Sep 2022
Copy link to clipboard 
Print this post

  Quote  Datasnip comes as a free to use "basic' version which does work however using the Serial Console at random intervals (usually 30seconds or so) an ESC sequence appears as key presses, [?25h   which I believe is a `Cursor ON' command and is part of the VT100 emulation of MMBasic Console. No other escape sequences appear.


That escape sequence is sent after 30 seconds of inactivity on the USB port as a 'keep alive' to stop the pico's USB from having a nana nap. It can be a pain at times but the pico USB library always seems to be a pain...

Jim
VK7JH
MMedit   MMBasic Help
 
bigmik

Guru

Joined: 20/06/2011
Location: Australia
Posts: 2634
Posted: 02:08am 22 Sep 2022
Copy link to clipboard 
Print this post

Thanks Jim,

I thought it was something like an `I am still here' command but in any case it shouldn't be an issue if the actual PM com port was used, and indeed with creative use of the filter I have worked around it, I just haven't got around to testing the COM port side yet.

Mick
Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<<
 
Andrew_G
Guru

Joined: 18/10/2016
Location: Australia
Posts: 651
Posted: 02:30am 22 Sep 2022
Copy link to clipboard 
Print this post

Hello to Pwillard, Mick, Jim et al,

Mick's photo above - ie the back of the LCD with the 'Hot Snot' - also shows Mick's PicoMup.

I'm not sure that he has 'released' it yet but one of these will form the basis of my Weather Station upgrade. It houses WiFi, DS18B20, HC-12, BM180, RTC and can connect to VGA or LCD, and breaks out all of the Pico's available data pins - plus more. All in a very small footprint.

The code that Mick oversaw for the Datasnip button-box can easily be amended to:
- capture data sent by Datasnip (in the OPEN command include an interrupt Subroutine to receive and process the data)
- show the date and time etc. (Mick prefers not).

Another example of how useful the PicoMite and MMBasic are.

Cheers,

Andrew
 
Print this page


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

© JAQ Software 2022