Lpc2000

There will be two jumpesr J11 and J2 to make the internal ADC to 
get the input VIN in MCB2130.

regards 
bala

On Thu, 02 Jun 2005 soren_t_hansen 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
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