compiling for ram

> I purchased an olimex AT91SAM7-P64 board which I would like to use with
> winarm. I'm currently trying to set my environment development. If I
> compile the at81sam7s64_hello with RUN_MODE=RAM_RUN and with THUMB not
> set the compilation fail. The linker tells me that region DATA is full!

Maybe, the "hello"-example uses iprintf. The newlib's stdio-functions
need some memory.

> I do not understand why the code is so big! The keil hello example only
> use 2496 bytes! So, what does it mean?

First of all: I personaly do not like "!" where not appropriate.

The Keil-library for stdio-functions produces smaller binary-code.

You can replace iprintf by some kind of puts. IRC puts is already
implemented in the example. Or buy a commercial product with a library
which is optimised for low ROM/RAM targets (Rowley, Keil, IAR etc.)

> With 16kB of RAM, it seems difficult for me to debug in RAM. How do you
> debug a program which is bigger than 16kB?

In flash. Newer version of openocd and ocdremote support debugging in
flash with a "wiggler". Other tools support this too.


Martin Thomas