Lpc2000

Hi,

I'm using Keil & GNU to compile an example program that does simple GPIO
manipulation and sends some data through the UART, but for some reason,
there is a software interrupt (SWI_Handler??) for no apparent reason.

This shows in the simulator, and on the board it just freezes.

I don't know what could be causing this as I've just string together a load
of code that works individually (i.e. tested Uart stuff, tested the GPIO
stuff).. 

 

Just wondered if anyone had any ideas.

 

Thanks

Rob

http://www.robs-projects.com/

SWIs are sometimes used to handle the "OS specific" calls that live inside 
printf and other libc callsetc. If you are using these then you might be 
generating SWIs.

Set a breakpt on the swi handler and do a backtrace when this goes off. Might 
give you some hints where it came from.

On Tuesday 25 May 2004 05:27, Rob R wrote:
> Hi,
>
> I'm using Keil & GNU to compile an example program that does simple GPIO
> manipulation and sends some data through the UART, but for some reason,
> there is a software interrupt (SWI_Handler??) for no apparent reason.
>
> This shows in the simulator, and on the board it just freezes.
>
> I don't know what could be causing this as I've just string together a load
> of code that works individually (i.e. tested Uart stuff, tested the GPIO
> stuff)..
>
>
>
> Just wondered if anyone had any ideas.
>
>
>
> Thanks
>
> Rob
>
> http://www.robs-projects.com/