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Hello All,
Is there any limitation in analog input #? I have ADCIN working OK with AN15 but it does not work with AN16.
Defines are standard:
DEFINE ADC_BITS 10 'Set number of bits in result
DEFINE ADC_SAMPLEUS 50 'Set sampling time in uS
DEFINE ADC_CLOCK 3
adcin 16 , READING returns a value around near 14000 (READING is word) which is strange for 10 bit conversion...
I use microcontroller PIC18F25k22
adcin 15 works OK
Can someone comment please?
Thank you
Anselc correctly set ?
Yes,
ANSELC = %11000 'C.3, C.4 analog
C.3 and C.4 are AN15 and AN16
I suspect that unless there is my mistake somewhere, input # may be a byte variable in PBP3
I did the reading manually:
ADCON2 = %10000000 '111 'LEFT JUSTIFIED(0),not used,...
ADCON0 = %1000001 'AN16 USED 10000, NO GO NOW,STAY ON
ADCON1 = %1000 'VOLTAGE REFFERENCES
VREFCON0 = %10010000 'ENABLED, SET FOR 1.024 VOLT
RefNotReady:
IF VREFCON0.6 = 0 THEN GOTO RefNotReady
PAUSEUS 50
ADCON0 = %1000011 'GO NOW
ADCNotComplete:
IF ADCON0.1 = 1 THEN GOTO ADCNotComplete
AMB_TEMP.BYTE1 = ADRESH
AMB_TEMP.BYTE0 = ADRESL
VREFCON0 = 0 'DISABLE REFERENCE
ADCON1 = 0
ADCON0 = 0 'CONVERTER OFF, NO CURRENT
This seems to be working well
Which version of PBP are you using? The manual does not mention any limit to the number of addresses, but it is suspicious that 0-15 work and 16 and up do not...
It is PBP3 3.0.7.4, must be the most recent. Actually I did not try higher #s than 16.