[avr-gcc-list] Newbie Problems

[Panther Electronics]

Hi,

Can i get some explanation of the warning while compiling.

WARNING: 'sensor_temp1' has no address in mapfile.
WARNING: 'sensor_temp2' has no address in mapfile.
WARNING: 'sw_temp1' has no address in mapfile.
WARNING: 'sw_temp2' has no address in mapfile.

the above variables are local to tim0 overflow; the values of sensor_temp1 and 
sensor_temp2 is 0x00; that would mean that the variable value is lost on exit? 
what am i doing wrong?

---code--

SIGNAL(SIG_OVERFLOW0)        /* signal handler for tcnt0 overflow interrupt */
{
  static unsigned char sensor_temp1, sensor_temp2;
  static unsigned char sw_temp1, sw_temp2;
/*
    outp(~led, PORTB);       /* invert the output since a zero means: LED on
    led <<= 1;               /* move to next LED
    if (!led)                /* overflow: start with Port B0 again
        led = 1;
    */
    outp(0x00, TCNT0);          /* reset counter to get this interrupt again */
    if ( timers_1 )
        -- timers_1;
    if ( timers_2 )
        -- timers_2;

    if ( db_1 == db )
    {
        sensor_temp2 =  inp(PIND) & 0x7c;         /* 0x7c = &b0111_1100 */
        /* the balance code */
    }
    else
    {
        if ( bit_is_set( flag_1, in_flag_1 ) == 0 )
        {
            if ( bit_is_set( flag_1, sensor_in ) == 0 )
            {
                sensor_temp1 = ( inp(PIND) & 0x7c );
                sbi ( flag_1, in_flag_1 );
                db_1 = 0;
            }
        }
        else
            ++ db_1;
    }

--- compiler snap shot ----
avr-gcc --version
avr-gcc (GCC) 3.3 20021209 (experimental)
Copyright (C) 2002 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

"Size before:"
  text           data            bss            dec            hex        
filename
   0           1760              0           1760            6e0        
First.hex
avr-gcc -c -g -Os -funsigned-char -funsigned-bitfields -fpack-struct 
-fshort-enums -Wall -Wstrict-prototypes -Wa,-ahlms=First.lst -mmcu=at90s8515 
-I. First.c -o First.o
avr-gcc -Wl,-Map=First.map,--cref -mmcu=at90s8515 First.o    -lm --output 
First.elf
avr-objcopy -O ihex -R .eeprom First.elf First.hex
avr-objcopy -j .eeprom --set-section-flags=.eeprom="alloc,load" 
--change-section-lma .eeprom=0 -O ihex First.elf First.eep
objtool loadelf First.elf mapfile First.map writecof First.cof
WARNING: 'sensor_temp1' has no address in mapfile.
WARNING: 'sensor_temp2' has no address in mapfile.
WARNING: 'sw_temp1' has no address in mapfile.
WARNING: 'sw_temp2' has no address in mapfile.
"Size after:"
  text           data            bss            dec            hex        
filename
   0           1762              0           1762            6e2        
First.hex
"--------  end  --------"
"Errors: none"
>Exit code: 0

thanks in advance

Srikanth Kamath T



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