Lpc2000

Have you tried using the Watchdog Timer to reset?  
On other projects I've noticed that just jumping to address 0 can leave
the processor in a strange state (it's not really resetting the
processor), and subsequent interrupts were ignored until we hit the reset
button.  If you have a Watchdog Timer, that may work better to reset the
processor state.  Just set the timeout value to something small, but long
enough to execute the next few instructions (so you can clean up stuff and
enter an infinite loop)

Jim

--- Steffen Rose <ro@...> wrote:

> Hi,
> 
> I'm "playing" with interrupts.
> Now I have this situation:
> 
> Within the VIC some Interrupts are enabled and set.
> The ARM7 Core is in Usermode, the I Flag is 0.
> 
> Now I miss my Interrupt generation.
> 
> What could be wrong?
> 
> Before this situation, for example I clear the Interrupts on the 
> VIC with 
> 
>     /* disable all Interrupts on the VIC unit */
>     LPC21_VIC_INT_ENCLR = 0xFFFFFFFFul;
>     /* reset current interrupt Flags */
>     LPC21_VIC_SOFTINT_CLR = 0xFFFFFFFFul;
> 
> Later I generate a SWI. Within the Software Interrupt function I 
> call this function:
> 
> void fl_destroyAppl(void) __arm 
> {
>     /* disable IRQ, FIRQ (Mode_SVC|I_Bit|F_Bit) */
>     __asm { 
> 		MSR CPSR_c, #0xD3 	/* (Mode_SVC|I_Bit|F_Bit) */
>                 LDR     R0, =0xE01FC040 /* MEMMAP */
>                 MOV     R1, #1 	/* User Flash Mode */
>                 STR     R1, [R0]
>     };
> 
>     ((void(*)(void))0)();
> }
> 
> 
> On address 0 the program restarts and the startup initializes and 
> enables the interrupts. But now the Interrupt engine is wrong.
> 
> Do you have a better command to reset the CPU? I want also reset 
> the internal resources. But I didn't find a Software Reset.
> 
> Thank you.
> -- 
> Steffen Rose
> 


----------------------------------------------------------
Jim Parziale
Email: nuncio_bitis@...
Malden, MA
----------------------------------------------------------


		
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