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tepes
Joined: 25 Jan 2012
Posts: 18
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| fprintf to a text file |
 Posted: Mon Jun 04, 2012 7:15 am |
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can anyone give me an example of how to to print the data from the PIC in to a text file? something like bellow...
| Code: | FILE * pFile;
.....
pFile = fopen ("myfile.txt","w");
for (n=0 ; n<100 ; n++)
{
fprintf (pFile, "%d ",n);
}
fclose (pFile);
...... |
Thank you very much! |
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Gabriel
Joined: 03 Aug 2009
Posts: 1067
Location: Panama
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| Posted: Mon Jun 04, 2012 9:45 am |
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Hi...
where would such file be?
SD card?
on a host PC?
Programing on a PIC is not like programing C++ on a PC where you just print to file.
the easiest way is get an "Open Log" set you back ~25 bucks... does all you want.
_________________
CCS PCM 5.078 & CCS PCH 5.093 |
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temtronic
Joined: 01 Jul 2010
Posts: 9225
Location: Greensville,Ontario
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| Posted: Mon Jun 04, 2012 9:49 am |
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or buy an FTDI Vinculum based USB flash drive module for same money +-
SUPER easy to create files,save data,etc. and 100% PC compatible ! |
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tepes
Joined: 25 Jan 2012
Posts: 18
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| Posted: Tue Jun 05, 2012 1:10 am |
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| I needed the .txt file to be on a computer and to fprint in to it by using RS232! But instead I print the data to hyper terminal now, and then I copy the data to a .txt file and then I use a C++ program to create a new file where the data is formated the way I need! It takes a litle more time but I obtain what I need! |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19505
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| Posted: Tue Jun 05, 2012 1:45 am |
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First, forget fprintf. This is designed for talking to a serial stream in the PIC, or a open file on the PC, and isn't the tool needed here.
On the PIC, with CCS, 'printf', is a generic output tool, able to route it's output to _any_ output routine using the syntax:
printf(routine_to_use,"what you want to send");
If you have a file open on an SD card, using the fat.h library, this offers 'fatputc', allowing you to write a character to this file. So you can use this as the output routine for printf, and write the text to the file. Obviously open first, flush & close when finished.
This then puts the data (text or binary), sequentially into the selected file.
Best Wishes |
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Gabriel
Joined: 03 Aug 2009
Posts: 1067
Location: Panama
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| Posted: Tue Jun 05, 2012 8:09 am |
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.... you can set hyperterminal to receive/capture a text file.
so basically what ever you see printed in hyperterminal is saved to a TXT file...
its a standard feature of Hyperterminal.
You can set your PIC to output your data in the format you want.
I did this for a data logger i was building a while back.
Each line the pic printed was
| Code: | ADCvalue1, Year, Month, Day, Hour, Min \n\r
ADCvalue2, Year, Month, Day, Hour, Min \n\r
ADCvalue3, Year, Month, Day, Hour, Min \n\r
....
ADCvalueN, Year, Month, Day, Hour, Min \n\r |
and then i could easily import data to Excel as it was a comma delimited text file.
_________________
CCS PCM 5.078 & CCS PCH 5.093 |
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tepes
Joined: 25 Jan 2012
Posts: 18
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| Posted: Wed Jun 06, 2012 3:40 am |
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| Thank you all for your help! |
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