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Home » RBC Forums » General Discussion » uTerm-S: a little low cost VT100-like terminal (VT100-like terminal with VGA out, PS/2 keyboard, RS232 and a "transparent" Serial-USB connector)
uTerm-S: a little low cost VT100-like terminal [message #6352] Mon, 27 May 2019 03:57 Go to next message
just4fun is currently offline  just4fun
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Registered: May 2017
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Because I need "some" VT100 terminals for new experiments, I've done the "stand-alone" version of the uTerm (the VT100 terminal board for the Z80-MBC2), the uTerm-S:

/forum/index.php?t=getfile&id=1408&private=0

Currently testing the RTS/CTS HW handshaking of the "transparent" serial-USB port of uTerm-S (it allows to use a terminal emulator on a PC i.e. to exchange files with XMODEM while the terminal is in use). Because both RTS/CTS signals are needed on the serial-USB adapter, I soldered a 2 pins connector on it...

/forum/index.php?t=getfile&id=1409&private=0
/forum/index.php?t=getfile&id=1410&private=0

I'll publish all the details after some testing.

[Updated on: Mon, 27 May 2019 04:02]

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Re: uTerm-S: a little low cost VT100-like terminal [message #6482 is a reply to message #6352] Mon, 26 August 2019 00:31 Go to previous messageGo to next message
just4fun is currently offline  just4fun
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Registered: May 2017
Location: Dark side of the Moon
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As currently I'm playing with other "things" and haven't the time to publish a decent article, I put here all the needed files to build it (including the FW).

uTerm-S is very similar to the uTerm board for the Z80-MBC2, so you can find here many useful info.

uTerm-S can run same FW of the uTerm, but here I've attached a new version that let you to select the serial speed @ 115200, 19200 or 9600.

Note about the MAX232: if you use a "chinese" MAX232 take into account that they generally "suffer" the "latch-up" syndrome (search on google for "burning MAX232"). Anyway you can use them if you know the trick...

For any question ask in this thread...

[Updated on: Tue, 27 August 2019 23:30]

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Re: uTerm-S: a little low cost VT100-like terminal [message #6485 is a reply to message #6482] Tue, 27 August 2019 01:39 Go to previous messageGo to next message
just4fun is currently offline  just4fun
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Registered: May 2017
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ops... wrong post...

[Updated on: Tue, 27 August 2019 01:41]

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Re: uTerm-S: a little low cost VT100-like terminal [message #6487 is a reply to message #6485] Tue, 27 August 2019 04:26 Go to previous messageGo to next message
b1ackmai1er is currently offline  b1ackmai1er
Messages: 239
Registered: November 2017
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Hi,

No luck trying to upload the Gerbers to JLCPCB.

Any ideas?

Thanks
Re: uTerm-S: a little low cost VT100-like terminal [message #6488 is a reply to message #6487] Tue, 27 August 2019 05:21 Go to previous messageGo to next message
just4fun is currently offline  just4fun
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Registered: May 2017
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Ahh.... JLCPCB is the only one who wants the X2 attribute set (Kicad):

/forum/index.php?t=getfile&id=1494&private=0

I've attached here the gerber they like...

BTW: the others services seem do not like this file with X2 enabled... Sad
Re: uTerm-S: a little low cost VT100-like terminal [message #6489 is a reply to message #6488] Tue, 27 August 2019 06:49 Go to previous messageGo to next message
b1ackmai1er is currently offline  b1ackmai1er
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Thanks that worked perfectly Smile ... spent a few hours on this ... would never have known that!

Regards Phil.
Re: uTerm-S: a little low cost VT100-like terminal [message #6513 is a reply to message #6489] Wed, 04 September 2019 01:05 Go to previous messageGo to next message
just4fun is currently offline  just4fun
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I've done an "easy link" to order a small batch of PCB (min. 5pcs) here: https://www.pcbway.com/project/shareproject/uTerm_S_stamd_al one_RS232_VT100_terminal_with_VGA_PS2.html
Re: uTerm-S: a little low cost VT100-like terminal [message #6530 is a reply to message #6513] Wed, 11 September 2019 04:23 Go to previous messageGo to next message
just4fun is currently offline  just4fun
Messages: 112
Registered: May 2017
Location: Dark side of the Moon
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Here how to select the baud-rate using a jumper on J1 (AUX).
J1 is checked only after a power-on or a reset.
Please use only pin 1, 2 and 3 of J1 as in the following image:

/forum/index.php?t=getfile&id=1510&private=0

BTW: you can flash it in the uTerm (A071218-R290319) too...
  • Attachment: Jumpers.jpg
    (Size: 53.81KB, Downloaded 173 times)

[Updated on: Wed, 11 September 2019 04:30]

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Re: uTerm-S: a little low cost VT100-like terminal [message #6532 is a reply to message #6530] Wed, 11 September 2019 07:11 Go to previous messageGo to next message
gkaufman is currently offline  gkaufman
Messages: 124
Registered: October 2015
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Waiting for PC boards to arrive...

Any notes on how to flash the CPU?

Thanks for what looks like a great project!

- Gary
Re: uTerm-S: a little low cost VT100-like terminal [message #6533 is a reply to message #6532] Wed, 11 September 2019 10:33 Go to previous messageGo to next message
just4fun is currently offline  just4fun
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@gkaufman: Thanks!

You should use a "ST-LINK v2" programmer connected to J4 (SWD) and follow carefully the steps explained for the previous uTerm board in the paragraph "HOW TO FLASH THE STM32 WITH THE ST-LINK V2" here.


Anyway there is an other way that doesn't require any "programming dongle", but you can just use the serial RS232 port (J7) or a serial-USB adapter attached to J3 (SER-USB) and connect it to a RS232 or USB port on a PC . You have to jumper JP1 (BOOT0) to enable the serial bootloader inside the STM32 MCU (every STM32 has a factory serial bootloader) and use a STM serial flash utility like this one.
After the upload, you have to remove the jumper on JP1 for normal operations.
I haven't tested this way with this board (having a ST-LINK V2 programmer), but it should work too...
Re: uTerm-S: a little low cost VT100-like terminal [message #6534 is a reply to message #6533] Thu, 12 September 2019 08:59 Go to previous messageGo to next message
gkaufman is currently offline  gkaufman
Messages: 124
Registered: October 2015
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Thanks, the ST-Link V2 is quite inexpensive. I ordered one via AliExpress, hopefully it will arrive before xmas...

- Gary

Re: uTerm-S: a little low cost VT100-like terminal [message #6548 is a reply to message #6534] Tue, 17 September 2019 02:44 Go to previous message
b1ackmai1er is currently offline  b1ackmai1er
Messages: 239
Registered: November 2017
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Boards arrived Smile Waiting on Aliexpress now too :0
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