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i'm working on ARM7TDMI-S cored LPC2138 for which i'm using keil compiler. while programming i came to a strange situation which is as follows. i wrote many programes in keil cross-compiler they worked well and thanx to keil for giving nice software. but for few cases i got SWI inturrupt automatically even programme can't get out of startup instructions while i debug the programme and my programme couldn't go further. Later by changing the programme i solved the problem but i couldn't point out the reason for that problem.... Now again i'm facing the same problem can anyone explain me why the problem comes??
i hope this code will help u for u'standing my problem.
#include<stdio.h> #include<stdlib.h> main() { float *a; int i; float j=1.2; a=(float *)malloc(10*sizeof(*a)); for(i=0;i<10;i++) { *(a+i)=j; j+=0.2; } }
Do you have a swi disable pragma in your retarget.c? #pragma import(__use_no_semihosting_swi)
Have you setup the heap in the startup file? Default heap size is 0, so memory allocation functions would fail. Try with 4 K bytes for a start.
Thanks for your concerned reply. It is now some months ago that i stopped to try to get started with REALVIEW. To answer your question i think i've used printf, it's ideal for debugging, but i'm not so sure this time.
I've just opened a new E-Mail-adress my_test_test_123@web.de especially for this purpose, as i hope someone will send me some helpful Files to help me getting Realview started.
My CPU is a ADuC7026. I'm not sure which startup.s, which retaget.c i should have used.
To tell the truth i have no idea what this files do, or what a heap is...
Cincerly yours