PBPluse "Warning" problem!?

[brodin]

When i am compiling my code this text comes upp:

PROGRAM COMPILED OK. 7959 Words used
114 Variables used in the 16F876A from a possible 368
Warning! Code will overwrite bootloader routine at top of program area.
THERE ARE WARNINGS!

What does this mean?

The problem occured when i am adding this line:
Milli = Milli - (Minute * 0.333)

Where Milli is a float and minute is a byte.

But it doesn't seems like there is something wrong with that line. Because when i delete another line it works ok!

Strange, seems like there is a memmory problem. But i havent used all the code space yet! only 7959 of 8000 something!

 

[RonDumas]

I believe there may be a memory problem. There is 8k available in the 876 and I think the bootloader takes a part of it leaving less than 8k for user code.

 

[Exo]

When i am compiling my code this text comes upp:

PROGRAM COMPILED OK. 7959 Words used
114 Variables used in the 16F876A from a possible 368
Warning! Code will overwrite bootloader routine at top of program area.
THERE ARE WARNINGS!

What does this mean?

The problem occured when i am adding this line:
Milli = Milli - (Minute * 0.333)

Where Milli is a float and minute is a byte.

But it doesn't seems like there is something wrong with that line. Because when i delete another line it works ok!

Strange, seems like there is a memmory problem. But i havent used all the code space yet! only 7959 of 8000 something!

Indeed, Seems like your using a bootloader. Wich is normally programmed into the pic near the end of program memory. Bootloaders for 16F devices normally take up something in the range of 256words

 

[brodin]

Okey, but do i need the bootloader. Do i need that when i am using a ICSP programmer? Or what it is there for?

 

[Nigel Goodwin]

Okey, but do i need the bootloader. Do i need that when i am using a ICSP programmer? Or what it is there for?

The compiler obviously knows about the bootloader, or it wouldn't be giving you a warning about it.

A bootloader allows you to program the PIC via a simple serial lead, no programmer needed - except to load the bootloader code in the first place.

You must have a seriously long program to be using that much memory space, 8K of PIC code is a BIG program.

 

[brodin]

Yes, it is a really big program. It contains a lot of text (LCD data) which takes up a lot of space. And i am using float point routines. The program so far has got about 900 lines.

The circuit has got a 2K EEPROM. I have thougt about putting the text there because i don't use the whole eeprom for other data storage. Or maybe in the internal EEPROM.

So i can skip the BOOTLOADER if i don't use the simple programming?
It doesn't affect any other functions, right?

 

[Exo]

Yes, it is a really big program. It contains a lot of text (LCD data) which takes up a lot of space. And i am using float point routines. The program so far has got about 900 lines.

The circuit has got a 2K EEPROM. I have thougt about putting the text there because i don't use the whole eeprom for other data storage. Or maybe in the internal EEPROM.

So i can skip the BOOTLOADER if i don't use the simple programming?
It doesn't affect any other functions, right?

If you're using a normal, external pic programmer then there is no need for the bootloader. Bootloading is used for self-programming. You'll probabely need to change some settings on your compiler to tell it you won't be using the bootloader.