bugAVR C Runtime Library - Bugs: bug #13226, ERROR of PRINTF_LIB_FLOAT of...

 
 

bug #13226: ERROR of PRINTF_LIB_FLOAT of WinAVR-20050214.

Submitted by:  None
Submitted on:  Mon 30 May 2005 08:38:31 AM UTC  
 
Category: NoneSeverity: 3 - Normal
Priority: 5 - NormalItem Group: None
Status: InvalidPercent Complete: 0%
Assigned to: NoneOriginator Email: -unavailable-
Open/Closed: ClosedRelease: None
Fixed Release: None

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Tue 31 May 2005 09:24:36 AM UTC, comment #1:

As replied in the mailing list: repeated calls to fdevopen()
without closing the handles eventually lead to malloc() running
out of space.

Joerg Wunsch <joerg_wunsch>
Project Administrator
Mon 30 May 2005 08:38:31 AM UTC, original submission:

email: -unavailable-
attn: Eric B. Weddington
from: rongjianwei/ -unavailable- /Beijing,
China

subject: ERROR of PRINTF_LIB_FLOAT of WinAVR-20050214.

Good moring,

I have met a problem about "PRINTF_LIB_FLOAT". In the
endless loop, it will occur a problem. After running a
few minutes, the sentence of "printf("%5.1f
%9.2f\n",fahrenheit, (5.0/9.0) * (fahrenheit - 32.0))
" will display wrong characters. How to resolve it?
The Source Code as follows.

*********************************************************************************************
/***************************************************
Title: 4_1_6.c
Author: ÈÖ½¨Î°(rongjianwei)
Date: 2005/01/15
Purpose:
?¨¹ý´®¿Ú¸ø¿ØÖÆÌ¨Êä³ö»ªÊ?ÉãÊ?ζȱ仯±í£¬µÚÈýÖÖ³Ì?ò?´·¨¡£ÒýÈë·ûºÅ³£?¿¡£
needed
Software: AVR-GCC
needed
Hardware:
Note: To contact me, mail to
-unavailable-
****************************************************/

#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>

#include <avr/io.h>

/*

  • System clock in Hz.

*/
#define SYSCLK 3686400UL //4000000 //14745600UL /*
Note [2] */

/*

  • Compatibility defines. This should work on

ATmega8, ATmega16,

  • ATmega163, ATmega323 and ATmega128 (IOW: on all

devices that

  • provide a builtin TWI interface).

*

  • On the 128, it defaults to USART0.

*/
#ifndef UCSRB
# ifdef UCSR0A /* ATmega128 */
# define UCSRA UCSR0A
# define UCSRB UCSR0B
# define UBRR UBRR0L
# define UDR UDR0
# else /* ATmega8 */
# define UCSRA USR
# define UCSRB UCR
# endif
#endif
#ifndef UBRR
# define UBRR UBRRL
#endif

#define lower 0 /* lower limit of table */
#define upper 300 /* upper limit */
#define step 20 /* step size */

void
ioinit(void)
{

UCSRB = _BV(TXEN); /* tx enable */
// UBRR = (SYSCLK / (16 * 9600UL)) - 1; /* 9600 Bd
4M¾§Õñ×î¸ßËÙÂʿɴï19200*/
// UBRR = (SYSCLK / (16 * 115200UL)) - 1; /* 115200
Bd */
UBRR = (SYSCLK / (16 * 57600UL)) - 1;

}

/*

  • Note [4]
  • Send character c down the UART Tx, wait until tx

holding register

  • is empty.

*/
int
uart_putchar(char c)
{

if (c == '\n')
uart_putchar('\r');
loop_until_bit_is_set(UCSRA, UDRE);
UDR = c;
return 0;
}

int main(void)
{ /* print fahrenheit--celsius table for
f=0,20,'..,300 */
double fahrenheit;
double celsius;
ioinit();

for(;;){

fdevopen(uart_putchar, NULL, 0);
printf("Fahrenheit celsius\n");
printf("»ªÊ? ÉãÊ?\n"); // could not
display the chinese charaters(GB2312) 2004/08/10

for(fahrenheit = lower; fahrenheit <= upper;
fahrenheit = fahrenheit + step ){
printf("%5.1f %9.2f\n",fahrenheit, (5.0/9.0)

  • (fahrenheit - 32.0));

}
}

return(0);
}
/****************************************************/

Anonymous

 

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Attached Files
file #3012:  4_1_6.rar added by None (14KiB - application/x-rar-compressed)

 

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Follow 4 latest changes.

Date Changed By Updated Field Previous Value => Replaced By
Tue 31 May 2005 09:24:36 AM UTCjoerg_wunschStatusNone=>Invalid
  Open/ClosedOpen=>Closed
Mon 30 May 2005 08:38:31 AM UTCNoneAttached File-=>Added 4_1_6.rar, #2550
  Carbon-Copy-=>Added rongjianwei --AT-- sina --DOT-- com

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