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Forum Index : Microcontroller and PC projects : CORRUPTION IN TERATERM
| Author | Message | ||||
OA47 Guru  Joined: 11/04/2012 Location: AustraliaPosts: 911 |
If I leave Teraterm running for a couple of days some of the characters end up screwy. The characters seem to gather another bit or something but it doesn't seem to effect the numbers. 
Can anyone throw some light on a cause? (happens on different PC's and different micromites) |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5020 |
Would be interesting to know, if you close down and reopen Tereterm without touching the MicroMite, is the corruption still there? That may narrow it down to a PC/Teraterm issue, or a Micromote issue. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 5913 |
It looks like some of the ASCII characters have the 8th bit set or some other translation. Can you provide a copy of the text (not a screen shot) TeraTerm can handle a lot of different encoding schemes other than plain ASCII so anything could have happened. Jim VK7JH MMedit MMBasic Help |
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| OA47 Guru Joined: 11/04/2012 Location: AustraliaPosts: 911 |
TassyJim: 10-09-2014 09:14:24 | PV 12.95 | SLA 12.60 | TMP 14.00 | S1-2 0 0 PTT 0 CD 0 .
10-09-2014 09:14:54 | PV 12.97 | SLA 12.63 | TMP 14.00 | S1-2 0 0 PTT 0 CD 0 . 10-09-2014 09:15:24 | PV 12.99 | SLA 12.64 | TMP 14.00 | S1-2 0 0 PTT 0 CD 0 . 10-09-2014 09:15:54 | PV 12.99 | SLA 12.67 | TMP 14.25 | S1-2 0 0 PTT 0 CD 0 . > MEMORY Flash: 16K (81% of 20K) Program (653 lines) 54b ( 3% of 1536b) 3 Saved Variables RAM: 17K (76%) 42 Variables 1K ( 2%) General 4K (22%) Free Gizmo: If I close down TeraTerm and restart it the corruption does clear. Interestingly the code above is cut and paste from what was shown on screen with corruption. |
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| Gizmo Admin Group Joined: 05/06/2004 Location: AustraliaPosts: 5020 |
Hmm, that would indicate its a problem with TeraTerm. Could you try Hyperterminal and see if the same thing happens? Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| OA47 Guru Joined: 11/04/2012 Location: AustraliaPosts: 911 |
I agree Gizmo that it is a problem with TeraTerm and it could possibly be evoked by the micromite program "printing" non-printable characters to the serial port when it reads a value from the inputs. I might alter the program to mask these characters and see what happens there. |
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| TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 5913 |
I suspect that there is a sequence of characters that tricks TeraTerm into thinking it needs to use a 'strange' font/encoding. The only time I have seen that is when I tried to display an XMODEM transfer. There is probably a setting in TeraTerm that will stop it happening (but I don't know which setting!) Next time try "Control / Reset Terminal" instead of restarting. Jim edit: It looks like lowercase characters are upset and UPPERCASE ones are OK. VK7JH MMedit MMBasic Help |
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| robert.rozee Guru Joined: 31/12/2012 Location: New ZealandPosts: 2290 |
from page 49 of the VT100 manual on geoff's website: G0 Sets G1 Sets
Sequence Sequence Meaning ESC ( A ESC ) A United Kingdom Set ESC ( B ESC ) B ASCII Set ESC ( 0 ESC ) 0 Special Graphics ESC ( 1 ESC ) 1 Alternate Character ROM Standard Character Set ESC ( 2 ESC ) 2 Alternate Character ROM Special Graphics the following micromite code produces the results in the teraterm window you are seeing: Print Chr$(27);"(0";
Memory Input a$ Print Chr$(27);"(A"; rob :-) |
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| OA47 Guru Joined: 11/04/2012 Location: AustraliaPosts: 911 |
Thanks Robert, Looks like I would only need to exclude Chr$(27) from printing to the console. |
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