funlw65 wrote:
var word measure
enable_digital_io() -- disable analog I/O (if any)
-- now configure ADC
const bit ADC_HIGH_RESOLUTION = true -- 10bit resolution
const byte ADC_NVREF = 0 -- no voltage reference
-- unfortunately, 16f877 don't have independent adc channels :(
const byte ADC_NCHANNEL = 1 -- that would be RA0
include adc
adc_init()
measure = adc_read(0) -- read on analog RA0
-- so, you have all digital, and one analog, have fun
Vasi(funlw65)
Thanks Vasi. I have added that code to my ADC notes file.
I appreciate the reply.
Wayne
On Jan 8, 4:06�am, "Wayne <[email protected]>" <[email protected]>
wrote:
William wrote:
On Jan 7, 7:10 pm, "Wayne <[email protected]>" <[email protected]>
wrote:
Make sure you don't call
enable_digital_io()
after this adc_init(), since this disables the use of ADC.
Right, I meant to say, I'm not sure how to do it with JALLIB.
-- Eur's routine to read the A/D
var word analog
procedure get_analog is
� �ADCON0_NDONE = true
� �while ADCON0_NDONE loop end loop
� �analog = word(ADRESH) << 8
� �analog = analog + word(ADRESL)
end procedure
ADCON0 = 0b01_000_001
ADCON1 = 0b10_00_1110
forever loop
� �get_analog()
� �-- display on lcd
end loop
William
I just finished re-reading the Joep & Toon Tutorial. �They explained the
answer to my question. �ie to use the analog pins as digital IO
you have to disable them using the enable_digital_io(). �what I had
read, but didn't remember, was that the non analog pins are usable any
way 'without' using the enable_digital_io() call.
So in my case I just have to use a digital pin for the LCD and an analog
pin for the adc and never call enable_digital_io().
Thank you Joep & Toon. �Your Tutorial has helped me yet again.
Regards
Wayne
--
You received this message because you are subscribed to the Google Groups
"jallib" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/jallib?hl=en.
