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) 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
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