Lpc2000

Hi,
you are trying to configure channel and start ADC at
the same time. I don't know which LPC2xxx you are
using but you should check the corresponding errata
for details.
Assuming that you have declared ADCR volatile I advise
you to use this code:

ADCR = (ADCR & 0xFFFFFF00) | (1 << 1) & (~(1 << 24));
ADCR = (ADCR & 0xFFFFFF00) | (1 << 24);

In order to avoid the bug and to be sure that you will
not start the ADC twice.

Regards
Zdravko Dimitrov

--- heedaf <ruffellfamily@...> wrote:

> I've got the following code to start the ADC.  If I
> put in a 
> breakpoint somewhere after the code and run to the
> breakpoint it will 
> enter an endless loop.  If I step manually past the
> while statement 
> and than run to the breakpoint it will work fine. 
> If I put in a delay 
> before the while statement it also works but this
> seriously slows down 
> the ADC.  I guess this has something to do with
> initialization but I'm 
> not sure.  Does anyone have any ideas?
> Thanks,
> Dewayne
> 
> 	ADCR = (ADCR & 0xFFFFFF00) | (1 << 1) | (1 << 24);
> 
>         //wait til done
>      
> 	while((ADDR & 0x80000000) == 0)
> 	  ;
> 
> 	//get result
> 	return (ADDR>>6) & 0x3FF;
> 
> 
> 
> 


\u0417\u043d\u0430\u043d\u0438\u0435\u0442\u043e \u0435 \u043b\u0438\u0447\u043d\u043e \u043f\u0440\u0435\u0436\u0438\u0432\u044f\u043d\u0430 \u0438\u0441\u0442\u0438\u043d\u0430.

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