PIC18F27Q43: #define AD_REF_SOURCE AD_REF_AREF does not set ADREF register

[Nobutarou Nosuke]

Hello,

I have a trouble with ADC setup for PIC18F27Q43.

Here is my code,

#Chip 18f27q43,16

#config LVP = ON
#config MCLR = ON

#define USART_BAUD_RATE 9600
#define USART_TX_BLOCKING
#define USART_DELAY OFF
RC4PPS = 0x20 ; RC4 -> TX

; ADC setup
#define AD_REF_SOURCE AD_REF_AREF
#define ADSpeed LowSpeed
dir portb.7 in

Do
  hserprint readad12(anb7)
  HSerPrintCRLF
  wait 1 s
Loop

I expect that PREF bits in ADREF resister should be set to 0b10. However, I cannot see any ADREF resister operation in the resultant .asm file (attached).

Am I doing something wrong? or, a bug of GCBasic?

Thanks

[Anobium]

Can you check the Q43 demos. Do those ADC demos work?

I want to ensure the basics works before we look at the ASM.

Evan

[Nobutarou Nosuke]

Do you mean https://github.com/Anobium/Great-Cow-BASIC-Demonstration-Sources ?

However, I can only find one code which uses AD_REF_SOURCE,
https://github.com/search?q=repo%3AAnobium%2FGreat-Cow-BASIC-Demonstration-Sources%20%20AD_REF_SOURCE&type=code

And the code is for LGT8F328P.

Thus, I cannot check. I myself have already done some tests, blinking LED, serial sending, LCD, and ADC without any #DEFINE setups.

[Anobium]

I meant the basic ADC demos, but, I think you need to use FVRInitialize(). See the Help.

Evan

[Nobutarou Nosuke]

FVR? ADC basic demo?
Since I am new to GCBasic and then many things are unknown for me.

I have just added them manually to make things working,

ADREF.PREF0 = 0
ADREF.PREF1 = 1

Thanks,