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NXT, filehandles question, RobotC v1.46
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schuelaw
Rookie
Joined: Wed Feb 21, 2007 12:23 am Posts: 38 Location: Walla Walla, WA
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 NXT, filehandles question, RobotC v1.46
When I declare a filehandle variable:
TFileHandle OUTPUT; TFileIOResult result; string filename="test.dat"; int filesize = 400; //bytes
and open it for writing:
OpenWrite(OUTPUT,result,filename,filesize);
it's unclear from the documentation whether I need to assign a value to the OUTPUT variable (if so from what set?), e.g. OUTPUT=5, before I use the OpenWrite function or if the OpenWrite function is handling that for me, assuring that filehandles are unique.
Anybody know?
Albert
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| Sun Mar 29, 2009 6:36 pm |
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mightor
Moderator
Joined: Wed Mar 05, 2008 8:14 am Posts: 2864 Location: Rotterdam, The Netherlands
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 Re: NXT, filehandles question, RobotC v1.46
Hiya Albert,
OpenWrite() will assign a value to OUTPUT. This will be the number of the FH. Take a look at the "Nxt File IO Test.c" program in the "NXT Feature Samples" directory.
Regards, Xander
_________________| Some people, when confronted with a problem, think, "I know, I'll use threads," | and then two they hav erpoblesms. (@nedbat)| My Blog: I'd Rather Be Building Robots| ROBOTC 3rd Party Driver Suite: [ Project Page]
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| Mon Mar 30, 2009 12:56 am |
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elizabeth.mabrey
Expert
Joined: Sun Aug 19, 2007 2:43 pm Posts: 133 Location: New Jersey
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 Re: NXT, filehandles question, RobotC v1.46
I am currently using 2.25, none of the fileIO calls work, not even a simple call Delete()... This code worked fine with 1.46.
Anything new about 2.25 that I must include, perhaps!???
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| Sun Jul 03, 2011 8:33 pm |
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elizabeth.mabrey
Expert
Joined: Sun Aug 19, 2007 2:43 pm Posts: 133 Location: New Jersey
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 Re: NXT, filehandles question, RobotC v1.46
I am currently using 2.25, none of the fileIO calls work, not even a simple call Delete()... This code worked fine with 1.46.
Anything new about 2.25 that I must include, perhaps!???
errors: **Error**:ASM memory reference 'nIoResult' evaluates to undefined value **Error**:ASM memory reference 'hFileHandle' evaluates to undefined value **Error**:ASM memory reference 'nFileSize' evaluates to undefined value **Error**:ASM memory reference 'nIoResult' evaluates to undefined value
If this is a real bug... wonder if any fix is coming soon!? Or I should simply forget about any sort of data logging using RobotC? ?
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| Sun Jul 03, 2011 8:33 pm |
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mightor
Moderator
Joined: Wed Mar 05, 2008 8:14 am Posts: 2864 Location: Rotterdam, The Netherlands
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 Re: NXT, filehandles question, RobotC v1.46
Can you attach your code?
- Xander
_________________| Some people, when confronted with a problem, think, "I know, I'll use threads," | and then two they hav erpoblesms. (@nedbat)| My Blog: I'd Rather Be Building Robots| ROBOTC 3rd Party Driver Suite: [ Project Page]
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| Mon Jul 04, 2011 12:37 am |
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elizabeth.mabrey
Expert
Joined: Sun Aug 19, 2007 2:43 pm Posts: 133 Location: New Jersey
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 Re: NXT, filehandles question, RobotC v1.46
After further investigating into this, the problem is more serious than that . Once it compiles, it makes the RobotC app simply not usable. Any other programs compilation will fail until I restart the robotc, even with a simple task main with one simple motor command.
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| Mon Jul 04, 2011 6:19 am |
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mightor
Moderator
Joined: Wed Mar 05, 2008 8:14 am Posts: 2864 Location: Rotterdam, The Netherlands
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 Re: NXT, filehandles question, RobotC v1.46
I can confirm this with 2.26.1. Could you please send your program and a report of the error and the url of this thread to support@robotc.net? Thanks  - Xander
_________________| Some people, when confronted with a problem, think, "I know, I'll use threads," | and then two they hav erpoblesms. (@nedbat)| My Blog: I'd Rather Be Building Robots| ROBOTC 3rd Party Driver Suite: [ Project Page]
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| Mon Jul 04, 2011 6:57 am |
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elizabeth.mabrey
Expert
Joined: Sun Aug 19, 2007 2:43 pm Posts: 133 Location: New Jersey
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 Re: NXT, filehandles question, RobotC v1.46
I am using 2.25 (8.19) August 20, 2010 version. I am afraid to upgrade it to 2.26.1 because there is another very fundamental C semantic errors with it according to my students: motor[motorA] = motor[motorB] = 0; no longer works. They have do them in independent expressions. ie. motor[motorA] = 0; motor[motorB] = 0; If this fundamental semantic goes wrong, I hate to think what else may be wrong. The last stable version I had was 1.46, except the poor structure and floating point handling support.  Yes, please do see you can replicate these two issues in 2.26.1. Thank you!
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| Mon Jul 04, 2011 7:12 am |
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mightor
Moderator
Joined: Wed Mar 05, 2008 8:14 am Posts: 2864 Location: Rotterdam, The Netherlands
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 Re: NXT, filehandles question, RobotC v1.46
Just mail these bugs to support@robotc.net, that will ensure the issues are entered into the ticketing system. - Xander
_________________| Some people, when confronted with a problem, think, "I know, I'll use threads," | and then two they hav erpoblesms. (@nedbat)| My Blog: I'd Rather Be Building Robots| ROBOTC 3rd Party Driver Suite: [ Project Page]
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| Mon Jul 04, 2011 7:26 am |
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elizabeth.mabrey
Expert
Joined: Sun Aug 19, 2007 2:43 pm Posts: 133 Location: New Jersey
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 Re: NXT, filehandles question, RobotC v1.46
Yes, I did, [#373623] . Since I do not have 2.26.1, I am anxious to know if this is fixed in 2.26.1.
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| Mon Jul 04, 2011 7:55 am |
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mightor
Moderator
Joined: Wed Mar 05, 2008 8:14 am Posts: 2864 Location: Rotterdam, The Netherlands
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 Re: NXT, filehandles question, RobotC v1.46
This program works fine for me in 2.26: - Xander
_________________| Some people, when confronted with a problem, think, "I know, I'll use threads," | and then two they hav erpoblesms. (@nedbat)| My Blog: I'd Rather Be Building Robots| ROBOTC 3rd Party Driver Suite: [ Project Page]
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| Mon Jul 04, 2011 9:35 am |
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elizabeth.mabrey
Expert
Joined: Sun Aug 19, 2007 2:43 pm Posts: 133 Location: New Jersey
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 Re: NXT, filehandles question, RobotC v1.46
Xander, is yours 2.26 or 2.26.1? The one the kids downloaded is 2.26.1. When I get back with the kids, I'll look into it myself as well. a lot of thanks as always. By the way, away from the topic a bit. I have always meant to write you about the "HiTechnic Sensor Multiplexer" document that you wrote. It is an excellent document. I used it for writing the interface with Robolab too. 
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| Mon Jul 04, 2011 10:38 am |
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mightor
Moderator
Joined: Wed Mar 05, 2008 8:14 am Posts: 2864 Location: Rotterdam, The Netherlands
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 Re: NXT, filehandles question, RobotC v1.46
I have 2.26.1
- Xander
_________________| Some people, when confronted with a problem, think, "I know, I'll use threads," | and then two they hav erpoblesms. (@nedbat)| My Blog: I'd Rather Be Building Robots| ROBOTC 3rd Party Driver Suite: [ Project Page]
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| Mon Jul 04, 2011 4:14 pm |
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tfriez
Site Admin
Joined: Wed Jan 24, 2007 10:42 am Posts: 537
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 Re: NXT, filehandles question, RobotC v1.46
This worked fine for me in 2.26.1/Firmware 8.23 - I don't have 2.25 to address this specific error message. I modified the original program some. The max size of an array of strings is 24 elements - after that, you're out of temporary variables. I'll see if there's anything we can do to increase this size. Also, when referring to a string array, simply saying "str" will not print all results - I moved the write command inside of the for loop so that each array element will be written to the text file.
_________________Timothy Friez ROBOTC Developer - SW Engineer tfriez@robotc.net
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| Sun Jul 10, 2011 5:26 pm |
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elizabeth.mabrey
Expert
Joined: Sun Aug 19, 2007 2:43 pm Posts: 133 Location: New Jersey
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 Re: NXT, filehandles question, RobotC v1.46
This has been reported to robotc bug report. I thought I would put it up at the forum to catch others' input.
I redownloaded the 2.26.1 as my version said 2.26 instead. I'll try it again and update for both the NXT file handling and motor errors.
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| Mon Aug 22, 2011 6:48 am |
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