Lpc2000

Soren:
My apologies and thanks for your response. I finally got the ADC to 
work by doing a complete AD0CR setting with start, waited for the 
done, read the value, and I was in business.
Regards,
Steve
--- In lpc2000@yahoogroups.com, "soren_t_hansen" 
<soren_t_hansen@y...> wrote:
> --- In lpc2000@yahoogroups.com, "stiffsoft" <stiffsoft@s...> wrote:
> > Hello,
> >    Does anyone have any C code that actually reads the MCB2130 
> > hardware ADC on AIN1 (the potentiometer tied to P0.28) they 
would be 
> > willing to share?  I have tried the Keil code, the Hitex example
> > code, manipulating bit values, etc., for most of 2 days and 
cannot 
> > get ADC to return a value that I can display via COM1 on the 
> > MCB2130.  The code I have been exploring uses hardware 
continuous 
> > conversions rather that software interrupt driven conversions.  
I 
> > really thought the hardware conversion would be easier to 
implement 
> > than the software.
> >    I verified that the voltage varies at P0.28 with a DMM when I 
> > adjust the pot, but I get nothing but 0 from AD0DR.  
> >    I contacted Keil via telephone and didn't get much help (other
> > than suggesting I run it in the simulator -- more stuff to 
learn).  
> > I also sent my source code to their support center, but have not 
> > received a response.
> >    Any suggestions (or simple code hints) will be greatly 
> > appreciated.
> > 
> > Steve Stiff
> 
> Have you made sure that the J2 jumper is set? Also make sure that 
you
> use the lpc213x.h instead of the lpc21xx.h 
> I'm using the following code as a small example:
> 
> AD0CR |= 0x01200000;                      /* Start A/D Conversion 
*/
>   do {
>     val = AD0DR;                            /* Read A/D Data 
Register */
>   } while ((val & 0x80000000) == 0);       /* Wait for end of A/D
> Conversion */
>   AD0CR &= ~0x01000000;                     /* Stop A/D Conversion 
*/
> 
> Is this the same as you have?
> 
> Best Regards
> Søren Hansen