Shouldnt the #use delay(clock=10000000) be 20000000 as I am using a 20MHz clock?
Also, the delay of 100ms.  Why have you chosen this, is it the time for the pic to register and process the analogue to digital conversion, so after 100mS it is ready to sample again?
I assume that the result of the conversion is stored in value. Say for example I nputed 2.5v into the PIC how can I actually see what this value is to ensure that the A2D is functioning correctly.


Dean Matthews
Reliability Engineering
Ford Engine Plant Bridgend
South Wales, U.K
Tel No:(01656)672597
Fax No:(01656)672558
Email: dmatth14@ford.com
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-----Original Message-----
From: D Lloyd [mailto:dan.lloyd@GB.ABB.COM]
Sent: 29 October 2001 12:04
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: USING CCSC C COMPILER


Hi,

"Does anybody have any example C programs using the CCSC compiler for using
the onboard A2D converter on the PIC16F877."

A derivative of one of CCS' own examples - presumably they won't mind me posting it if they sell a compiler on the back of it ;-)

#use delay(clock=10000000)

void main (void)
{
   int value;

   setup_port_a( ALL_ANALOG );           // Next 3 lines are inbuilt functions
   setup_adc( ADC_CLOCK_INTERNAL );
   set_adc_channel( 0 );

   do {
         value = Read_ADC();
         delay_ms(100);
         printf("\n\r%2X\r\n", value);
   } while (TRUE);
}


Regards,
Dan

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