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
LPC2138 ADC
Started by ●June 2, 2005
Reply by ●June 2, 20052005-06-02
--- In lpc2000@lpc2..., "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
Sen Hansen
> 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
Sen Hansen
Reply by ●June 2, 20052005-06-02
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@lpc2..., "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
>Sen Hansen
>Yahoo! Groups Links
>To br> >.
>
Reply by ●June 13, 20052005-06-13
Bala:
My apologies and thanks for your response. Both jumpers are in. 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@lpc2..., "balakumar chinuswamy"
<cbalakumarbe@r...> wrote:
>
> 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@lpc2..., "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
> >Sen Hansen
> >Yahoo! Groups Links
> >To br> > >.
> >
My apologies and thanks for your response. Both jumpers are in. 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@lpc2..., "balakumar chinuswamy"
<cbalakumarbe@r...> wrote:
>
> 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@lpc2..., "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
> >Sen Hansen
> >Yahoo! Groups Links
> >To br> > >.
> >
Reply by ●June 13, 20052005-06-13
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@lpc2..., "soren_t_hansen"
<soren_t_hansen@y...> wrote:
> --- In lpc2000@lpc2..., "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
> Sen Hansen
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@lpc2..., "soren_t_hansen"
<soren_t_hansen@y...> wrote:
> --- In lpc2000@lpc2..., "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
> Sen Hansen
