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diy-VT100 - A Miniature hardware terminal

Miniature VT100 with all the bells and whistles

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A small VT100 that you can carry in your hands, connect to any hardware that provide serial interface.
- Bell (Speaker - 800Hz - Generated via DAC)
- 7 LED (ONLINE, LOCAL, KBD LOCKED, L1, L2, L3, L4 )
- USB and PS/2 Keyboard
- UART 3.3V (5V tolerant pins & Multiple speeds)
- LCD (80x48 characters)
- Accept VT100 commands (most of them - at the moment)
- EEPROM to store configuration
- Uses STM32F767 (ARM uC M7)

Design files and firmware will be released under GNU GPLv3 or later
(Please give me sometime :)


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Gravis wrote 04/17/2017 at 23:14 point

If any, which kernel are you using?  The upside of using a pre-ported kernel is that you can replace the MCU with something cheaper/nicer/freer/etc.  If none, consider ChibiOS/RT or NuttX!

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Kuldeep Singh Dhaka wrote 04/18/2017 at 08:50 point

Im UniCore-MX for hardware abstraction (no OS) and there is a seperation between uC specific code and general code (so porting is easier with changes to hardware code or adding a new target). also, code is compile-time configurable with number of rows and columns (and other parameter) to accomodate different sizes lcd and RAM.

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Gravis wrote 04/18/2017 at 13:21 point

Sounds like a unikernel.  It's limited to ARM so I recommend taking a look at the two I listed.   I'm not insisting you switch, I just think you should consider other options that could make your project more flexible.

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Daniele Lacamera wrote 6 days ago point

@Gravis baremetal programming is not the same as a unikernel. Besides, since you are a supporter of Open Source POSIX kernels for ARM, you should also have a look at frosted https://github.com/insane-adding-machines/frosted which is also based upon unicore-mx

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jupdyke wrote 04/07/2017 at 23:34 point

I designed and install a data logger that I designed. If something is not working, I have to connect my laptop. I am very interested in this. I would buy a prototype from you, or a kit, or whatever you wanna offer. I would trade you services too. I do mechanical design and have access to a lot of equipment. Maybe I could help you with a laser cut case to go with it. Let me know.

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Kuldeep Singh Dhaka wrote 04/08/2017 at 15:04 point

Im working on the new design.
You probably want to get that one.

Wait for some time, i will be adding a log for the new design.

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audio.cf wrote 04/07/2017 at 13:13 point

Have you thought about adding a rs232 interface ? there is lots of space you could add a max232 and db9 footprints on board as options.

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Kuldeep Singh Dhaka wrote 04/08/2017 at 15:09 point

Yes, in the new design -EXTension connector is provided. 

Also UART/TIMER/GPIO/I2C/SPI pins are in EXT for anything that people want to attach/extend. Perfectly fullfil your usecase: attach a MAX232 and DB9.

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Felix Richter wrote 04/06/2017 at 21:14 point

Hey, is there a way to adjust the BAUD rate without re-flashing the STM? I was thinking about some kind of "universal" serial Terminal for quick debugging of other uCs.

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Kuldeep Singh Dhaka wrote 04/07/2017 at 01:07 point

Yes, the baud rate can be changed without flashing  (see SETUP-B picture "T SPEED" "R SPEED").

Just like original VT100, one has to goto SETUP-B and change UART speed. alot of speeds are support. 

also, the setting (which includes uart speed data) can be saved on EEPROM. on power up it read settings from EEPROM.

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cooheneliezer wrote 03/27/2017 at 17:34 point

I still don't understand what it is usefull for.

Can u plz explain

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Kuldeep Singh Dhaka wrote 03/30/2017 at 14:08 point

This is a hardware based text terminal.

You can send VT100 compatible command (via UART) to write text on screen.

VT100 also support graphical drawing [ex: line, pixel] (will be implemented in future)

This project act as a quick screen to any project that output/input via UART.

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Duke Circuit Co.,Ltd wrote 03/26/2017 at 05:29 point

How to use this item?

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Kuldeep Singh Dhaka wrote 03/27/2017 at 08:09 point

Send over UART {RX, TX} with power from {5V, GND} ready!

Accept VT100 commands.

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Luis Diaz wrote 12/30/2016 at 18:39 point

Hi!

This is a very nice project. Thanks for sharing.

Do you have BOM for the project? Will love to build one for myself :)

  Are you sure? yes | no

Kuldeep Singh Dhaka wrote 12/30/2016 at 19:58 point

Hi Luis,

The design has few problem that im planning to fix soon.

And then upload the complete improvised design. :)

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Luis Diaz wrote 01/02/2017 at 11:47 point

Nice! Thanks!

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Craig Hissett wrote 12/30/2016 at 15:06 point

This is fantastic. So many uses for a handy terminal such as this.

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Kuldeep Singh Dhaka wrote 12/30/2016 at 15:21 point

Thank you!

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Craig Hissett wrote 12/30/2016 at 16:03 point

You're more than welcome!

If you ever start selling these get in touch; I'd love to get one.

I currently use and arduino with lcd shield and a few buttons to pass commands to devices via serial,  but it involves having to hardcode commands into the menu to be senylon hen selected . The keyboard support on this would make life so much easier!

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ethan.dicks wrote 12/22/2016 at 20:04 point

Very nice for many things, but I still use vintage dumb terminals attached to real and emulated vintage machines (mostly PDP-8, PDP-11, etc., but a few others), and there are plenty of programs that aren't just writing to stdout (that use curses or just raw VT100 control sequences) that expect a minimum screen size of 80x24.  Some vintage apps check, but they are really only checking for 80x24 vs 132x24.  The screen layouts assume a minimum of 80 cols wide.

Great start though.  Definitely clean and minimal, and I do appreciate the support for both USB and PS/2 keyboards.

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Kuldeep Singh Dhaka wrote 12/23/2016 at 20:59 point

@ethan.dicks I agree, I have felt the same.

Need to find a LCD that is appropriate in number of pixel, screen area and price (and still "fit" on the palm).
Thank you for your inputs.

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Wenting Z. wrote 12/24/2016 at 01:57 point

80x24 text using  5x7 text requires a resolution of 480*192, I think these 3.2 IPS 480*320 screens worth a try. I'm currently in China and planning go back to the U.S. next month. And I got a LOT of different screens here with very low price (3.2 IPS 480*320 for $1 each, 4.0 IPS 800*480 for $2 each)! If you are interested, I can send you some screens :)

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Kuldeep Singh Dhaka wrote 12/25/2016 at 14:17 point

@Wenting Z. Interesting! lets talk on this more. :)

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Kuldeep Singh Dhaka wrote 03/20/2017 at 17:01 point

@ethan.dicks Please see update on the rev 3!

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