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mvaraujo
Joined: 20 Feb 2004
Posts: 59
Location: Brazil
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| Printf output problem? |
 Posted: Mon Jul 05, 2004 7:56 am |
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Hi all,
I have something like this on my code:
| Code: | | printf(disp_store,"%03lu.%1uV %02u.%1uHz",v_rms,v_rms_dec,freq,freq_dec); |
It seams that sometimes it didn't output 16 characters but one less. Did you guys experience any problems like that on printf command?
Thanks!
Marcus |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Jul 05, 2004 11:47 am |
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| Quote: | | It seems that sometimes it didn't output 16 characters but one less |
I made a test file and compiled it for the 16F877 with PCM vs. 3.188.
It works. I changed the printf statement to remove the output
to "disp_store", and instead I sent it to my terminal window.
I also added a 2nd line, which shows the character count.
Here are the results displayed in the terminal window:
| Code: | 012.3V 04.5Hz
1234567890123456 |
Here is the test program:
| Code: | #include <16F877.h>
#fuses XT, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock = 4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)
//===============================
main()
{
int16 v_rms;
int8 v_rms_dec;
int8 freq;
int8 freq_dec;
v_rms = 12;
v_rms_dec = 3;
freq = 4;
freq_dec = 5;
printf("%03lu.%1uV %02u.%1uHz",v_rms,v_rms_dec,freq,freq_dec);
printf("\n\r1234567890123456\n\r");
while(1);
} |
If this reply does not fix your problem then you should post
your own test program that demonstrates the problem, and
also give the PIC and the version of your compiler. |
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mvaraujo
Joined: 20 Feb 2004
Posts: 59
Location: Brazil
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| Posted: Mon Jul 05, 2004 12:37 pm |
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PCM programmer,
In fact I use this command and it works on the application. The point is that sometimes it sends other character less to the output. I still didn't find any correlation to interrupt services.
My question intends to know if any buggy behaviour in printf() is know by people!
Thanks!
Marcus |
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Guest
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| Posted: Mon Jul 05, 2004 7:57 pm |
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the last one char will not be sent out if without the ... while(1); ... because CCS send PIC into sleep before the last one get out.
that's what happened to me years ago. |
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