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Frank N. Furter
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Joined: 28/05/2012
Location: Germany
Posts: 831

Posted: 03:03am 27 Mar 2014

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Hi,

it would be nice to clean the entire (visible) screen on the VT100 terminal.
The good old "CLS" command doesn't work anymore...

I tried several VT100 commands as

Print Chr$(27);"[H"
Print Chr$(27);"[f"
Print Chr$(27);"[2J"

but I am not able to clean the entire screen! The first line will be always untouched and not deleted!

Did anybody have an idea?

(@Geoff: ...I think I remember that the CLS works on the MM on VGA, BAS *and* terminal window?)

Thanks

Frank

WhiteWizzard
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Joined: 05/04/2013
Location: United Kingdom
Posts: 2817

Posted: 03:47am 27 Mar 2014

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Hi Frank,

If you are using Tera Term, then under the 'Edit' menu there is an option to 'Clear Screen'. Does what it says on the tin!
Other console programs should have a similar feature.

There is little meaning in having any graphical control with a MicroMite (including CLS) when you think about it.

Let us know if this is a suitable solution for you!

Regards,
Phil

For everything Micromite visit micromite.org

Direct Email: whitewizzard@micromite.o

Lou

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Joined: 01/02/2014
Location: United States
Posts: 229

Posted: 05:25am 27 Mar 2014

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The CLS is handy when editing on chip, I also miss it. It was probably taken out for more room in the uMite for other features, maybe it will show up again on the 170 chip - only Geoff knows.

WW's work around works but you have to grab the mouse. A work around from the keyboard is F4 then ESC key from the command prompt, that will clear it.

LouEdited by Lou 2014-03-28

Microcontrollers - the other white meat

Frank N. Furter
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Joined: 28/05/2012
Location: Germany
Posts: 831

Posted: 05:52am 27 Mar 2014

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Hi White Wizzard,

you are right with the Teraterm option, but I need a CLS to print new values on the same position on the terminal window within a loop from the �Mite program...

I think it should be possible with any Teraterm-VT100 command.

FrankEdited by Frank N. Furter 2014-03-28

WhiteWizzard
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Posted: 06:03am 27 Mar 2014

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Hi Frank,

Not knowing exactly what you are doing, if this 'displayed' value is considered necessary, why not use a cheap LCD to display it?

The LCD concept is cheap, and reasonably well documented elsewhere on the forum.

Yes I fully appreciate that it can be very useful to display data in a fixed position on a console display (very much so for debugging purposes), but would you really design a MicroMite solution to display data on a console?

It would be very interesting to know more about you overall aim and what it is that you are 'building'.
Please share if you wish too . . .

Phil

For everything Micromite visit micromite.org

Direct Email: whitewizzard@micromite.o

psergiu

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Joined: 09/02/2013
Location: United States
Posts: 83

Posted: 07:42am 27 Mar 2014

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Since you are using an external serial terminal, the "clear screen" function is handled by your terminal.

The official VT100 clear screen sequence is "<ESC> [ 2 J" so your Print Chr$(27);"[2J" should have cleared-it. This means your terminal software is not 100% DEC VT100 compatible.

A built-in CLS command will just print "<ESC> [ 2 J" and will also not work on your terminal software. Also for people using other terminal types (VT52, DOS-ANSI, 3270, HPTERM, TEK ...) different escape codes for CLS are needed. And i don't think Geoff can fit the whole TermInfo/TermCap database in there

So find a escape code that works on your particular terminal and make your own CLS.

See here for some useful escape codes: http://www.termsys.demon.co.uk/vtansi.htm

WhiteWizzard
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Location: United Kingdom
Posts: 2817

Posted: 08:35am 27 Mar 2014

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Frank,

I can confirm that psergiu's method of using: Print Chr$(27);"[2J" works with TeraTerm.

Note that it clears the screen down to the current line. I guess you then need cursor positional control to place cursor at relevant location before printing your data.

Will look at the link psergiu provided and play a little more . . .

For everything Micromite visit micromite.org

Direct Email: whitewizzard@micromite.o

WhiteWizzard
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Posted: 09:03am 27 Mar 2014

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Frank,

OK got it working nicely with a little test program

(and no LCD required!!!)

x=0 ' used as a counter value that is displayed on the console window
Do
Print Chr$(27)+"[2J"+Chr$(27)+"[3;6H"; ' Escape codes to clear screen & move cursor to Row 3; Column 6
Print Str$(x); ' Print value of counter at cursor location (set above)
x=x+1 ' inc counter
Pause 333 ' delay a bit
Loop ' and repeat . . .

Try the above and see if it works for you too !!

Regards,

Phil

For everything Micromite visit micromite.org

Direct Email: whitewizzard@micromite.o

Geoffg

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Joined: 06/06/2011
Location: Australia
Posts: 3196

Posted: 01:24pm 27 Mar 2014

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There is a little shortcut that you can use here, the elements of a PRINT statement will be joined together when printed if they are separated by just spaces or nothing.

So, you don't need the semicolon (;) or the plus (+) characters.

For example, using Phil's example above, this will also work:

Print Chr$(27) "[2J" Chr$(27) "[3;6H"; ' Escape codes to clear screen & move cursor to Row 3; Column 6

Geoff

Geoff Graham - http://geoffg.net

WhiteWizzard
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Posted: 01:38pm 27 Mar 2014

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Thats worth knowing for the future

You're not wrong Geoff when you say its ' a LITTLE shortcut' !

For everything Micromite visit micromite.org

Direct Email: whitewizzard@micromite.o

Frank N. Furter
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Joined: 28/05/2012
Location: Germany
Posts: 831

Posted: 09:45pm 27 Mar 2014

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Thanks to White Wizzard, Psergiu and Geoff!!!

@ White Wizzard: I evaluate my ISL29023 lightsensor with my adapted program for �Mite which I offered in this thread:
http://www.thebackshed.com/forum/forum_posts.asp?TID=6161&PN =1
You are right that a LCD is necessary for a finished gadget but for my tests I have only the sensor, 1 LED and a PL2303 on my �Mite.

Thanks a lot to all for helping!
I tried it with >> Chr$(27)+"[2JChr$(27)+"[H << but I have forgotten the semicolon on the end!!!
...but with this little change my code print the values correct in the first line!!!

Print Chr$(27) "[2J" Chr$(27) "[H"; works very fine!!!

Frank

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