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Message |
hayee
Joined: 05 Sep 2007
Posts: 252
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| Unable to print integer value |
 Posted: Fri Sep 24, 2010 2:22 am |
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Hi,
I am afraid why this is happening. I want to display integer number on hyper terminal. The 8-bit integer is from 0-255 if we use simple int or unsigned int and -128 to 128 if we use signed int.
But when I print the unsigned int it shows the value b/w -128 to 128.
Then I thought that maybe my program is creating an error. I write a small separate program but it is also happening here. Can someone tell me where I am wrong? Following is my code.
| Code: |
#include <18f252.h>
#fuses HS,NOWDT,NOLVP,PUT,NOBROWNOUT
#use delay(clock=20000000)
#use rs232(xmit=PIN_C6, rcv=PIN_C7, baud=9600)
unsigned int a;
void main ()
{
while(1)
{
a++;
printf(" %d ",a);
if(a>250)
{
a=0;
}
delay_ms(500);
}
}
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Result on hyper terminal is like that
| Quote: |
00 -99 -98 -97 -96 -95 -94 -93 -92 -91 -90 -89 -88 -87 -86 -85 -
84 -83 -82 -81 -80 -79 -78 -77 -76 -75 -74 -73 -72 -71 -70 -69 -
68 -67 -66 -65 -64 -63 -62 -61 -60 -59 -58 -57 -56 -55 -54 -53 -
52 -51 -50 -49 -48 -47 -46 -45 -44 -43 -42 -41 -40 -39 -38 -37 -
36 -35 -34 -33 -32 -31 -30 -29 -28 -27 -26 -25 -24 -23 -22 -21 -
20 -19 -18 -17 -16 -15 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3
-2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59
60 61 62 63 64 65 66 67 |
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ckielstra
Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands
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| Posted: Fri Sep 24, 2010 3:13 am |
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This is a basic C programming error. If you had studied your C learning book, or the CCS manual you would have spotted the error immediately.
From the CCS manual on the Printf command for the format specifier | Quote: | c Character
s String or character
u Unsigned int
d Signed int
Lu Long unsigned int
Ld Long signed int
x Hex int (lower case)
X Hex int (upper case)
Lx Hex long int (lower case)
LX Hex long int (upper case)
f Float with truncated decimal
g Float with rounded decimal
e Float in exponential format
w Unsigned int with decimal place inserted. Specify two numbers for
n. The first is a total field width. The second is the desired number
of decimal places. |
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hayee
Joined: 05 Sep 2007
Posts: 252
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| Posted: Fri Sep 24, 2010 3:36 am |
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| Thanks ckielstra. Ya it was a basic thing but I didn't remember that. |
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