Keyboard USB to NMS 82xx

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Van bsittler

Master (247)

afbeelding van bsittler

22-06-2021, 03:46

This is so cool! Any chance RESET can instead be Ctrl+Alt+Del, since some compact keyboards omit the right Ctrl key?

Also, is there a way to use MSXVR (it works as a USB keyboard through A-to-B cable) as the keyboard this way? Would mappings work?

Van GodzIvan

Rookie (25)

afbeelding van GodzIvan

22-06-2021, 16:19

ok change to ctrl + alt + del
I don't own an MSXVR, and I don't care, too expensive for a Raspberry PI 3B +
is it possible to buy only the MSXVR keyboard?

Van roadfighter

Champion (441)

afbeelding van roadfighter

22-06-2021, 17:53

Where can i find the micro controller used in this project?
Cant seem to find it, or my google skills are not like they used to Smile

Found it on AliExpress, just search for WeAct STM32F411CEU6
I still got it Smile

Van GodzIvan

Rookie (25)

afbeelding van GodzIvan

23-06-2021, 21:46

BETA 5
general improvement, bug fix, new Windows-like reset method "ctrl + alt + del" being tested on the TR

USBTR

Van bsittler

Master (247)

afbeelding van bsittler

24-06-2021, 05:13

Ok that is amazing! Please let me know if you decide you're ready to sell a few, I'm happy to buy them. Also I suspect MSXVR won't work due to power requirements

Van jsm84b

Supporter (4)

afbeelding van jsm84b

11-09-2021, 16:46

Hi,
First of all,thank you for developing and sharing this work.
I'm going to start preparing a prototypes for use in a nms 8250 that I have without a keyboard.
Before I start ordering materials I would like to ask if there is a possibility to implement it using arduino boards instead of the one used. Arduino is a platform that I have used before and for which I have boards available.
Thank you,

Van jsm84b

Supporter (4)

afbeelding van jsm84b

13-11-2021, 17:42

Hi,
Yesterday, I was finally able to finish building a prototype.
Everything seems to work fine, but i'm having trouble with the layout of some keys.
I have checked the wires in the board, and everything seems correct.
The problem seems to affect only the letters and some function keys, as the others seem to work fine.
I have written down the correspondences between what I press and what I see on the screen. There is a pattern, but I don't know if it suggests to others what the origin of the problem may be:

---------
what i press => what i get on screen
---------
a => a
b => b
c => c
d => d
e => e
f => f
g => g
h => h
i => i
j => j
k => may + s
l => nothing
m => _
n => v
o => é
p => x + color
q => y + auto
r => z + goto
s => k
t => l
u => m
v => n
w => o
x => p
y => q
z => r
---------

Does anyone know what may be causing this behavior?
I am using a Spanish qwerty keyboard. The computer is a NMS8250/16, also bought in Spain.

Any comments will be appreciated.
Greetings!

Van st1mpy

Paladin (881)

afbeelding van st1mpy

13-11-2021, 19:09

What board are you using? It looks like it's selecting a wrong row (out of sync).

Van jsm84b

Supporter (4)

afbeelding van jsm84b

13-11-2021, 23:30

I am using WeAct STM32F411CEU6, which is mentioned a few messages back.
I have programmed it using ST-LINK and STM32CubeProgrammer, without any errors, and verifying the writing.
Do you think it could be due to a problem with the board?
Thanks for the help in any case.

Van jsm84b

Supporter (4)

afbeelding van jsm84b

14-11-2021, 18:04

Hello,
I have found the source of the problem.
The flat cable connector had cut some wires badly when installed, causing a short circuit between some wires.
I have removed the connector and reconnected it again, and the problem is fixed.
Thanks to all for the help,

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