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AJEllisuk
Joined: 03 Oct 2007
Posts: 4
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| Digits lost in sprintf string |
 Posted: Fri Jun 20, 2014 6:10 pm |
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Hi
I am creating a string to transmit over a serial port. The code is mostly fine, but I have a problem with "%04X" in sprintf; it loses the first 2 digits. For example if I want to print 0x0697 to a string, only 0x97 is written.
Below is a snippet of my code:
| Code: |
int8 txbuf[20];
int16 adc = 0;
int16 crc=0xFFFF;
int8 button;
adc = read_adc();
button = input(PIN_B0);
crc = update_crc(crc, adc);
crc = update_crc(crc, button);
sprintf(txbuf, "@%04X%02X%04X\r", adc, button, crc);
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Can someone please explain why the %04 format specifier is dropping the first 2 digits.
Kind regards
Andrew |
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temtronic
Joined: 01 Jul 2010
Posts: 9202
Location: Greensville,Ontario
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| Posted: Fri Jun 20, 2014 6:50 pm |
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might be a compiler bug, please tell us the version of your compiler.
hth
jay |
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jeremiah
Joined: 20 Jul 2010
Posts: 1337
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| Posted: Fri Jun 20, 2014 7:08 pm |
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| I haven't tried sprintf in CCS, but printf requires %04Lx on most of my boards |
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Mike Walne
Joined: 19 Feb 2004
Posts: 1785
Location: Boston Spa UK
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| Posted: Sat Jun 21, 2014 3:00 am |
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Yes, I know the CCS manual suggests what you are doing SHOULD give the result you want.
I've not tested it, but I suspect jeremiah is probably correct.
What he says makes sense, there is likely an error in the CCS manual.
Mike |
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Jerson
Joined: 31 Jul 2009
Posts: 125
Location: Bombay, India
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| Posted: Sat Jun 21, 2014 6:07 am |
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Have you tried using %04LX ?
L is for long integer which is 16 bits in CCS |
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AJEllisuk
Joined: 03 Oct 2007
Posts: 4
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| Posted: Sun Jun 22, 2014 3:48 pm |
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hello guys,
Thank you for your replies. Using "%04LX" solved the problem.
Andrew |
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