[PIC] I have two questions about the controller PIC16F886 related to ADC

[dor8]

hi,
1.
I want to know what until which voltage the ADC can measure?
my circuit works between voltages 26V to 52V and I want to know if the ADC knows measure such voltages without making a voltage divider?
* Data sheet does not say obvious - Write high voltage.

2.
Can I please get some examples of C programs that explain to me how I work with the registers of the ADC?
* I work with COMPILER of HIGH-TECH

3.
Does anyone know if there is a component of the multi Sim?
**I have not found a component of controller

Thank you and good day

 

[udayan92]

1. You will need to use a scaling system.Assuming that micro controller ADC has an input range of 0V to 5V,you will have to scale 26V to 0V,39V to 2.5V,52V to 5V..this might be useful as a reference...
https://electronics.stackexchange.com/questions/80981/how-to-measure-50v-to-50v-using-a-microcontroller-adc?rq=1

2.There are many programs availible both here and on the net....question is how will you be using ADC..? That will decide what your program should be...

3. No idea about that.....

 

[dor8]

Thank you ..
Can you please bring me examples of programs (I'm basically doing Converter).
I just want to understand how to use the registers of the ADC?
**I'm using a controller pic 16f886 and HIGH-TECH COMPILER

 

[KhaledOsmani]

This is how you initialize ADC process: (you call it in the main function)

ADCINIT
    MOVLW 0X0E
    MOVWF ADCON1
    MOVLW b'00000001'
    MOVWF ADCON0
    RETURN

This is the process itself:

CONAD
    BSF ADCON0,1
    CALL REPEAT
    MOVFF ADRESH,PORTD


REPEAT  BTFSC ADCON0,1
           GOTO REPEAT
           RETURN