16f676 adc with 4 leds


Image result for pic16f676


Using the analog to digital conversion module of 16f676

My test based on pic16f676 only. We should read the associated datasheet of manufacturer.
Here, I use 4 leds to view digital output and 500k ohm potentiometer of variable dc input to sensing pin.
My codes . . . . .

'****************************************************************
'*  Name    : 16f676_adc_with_4led.pbp                                      *
'*  Author  : WAAGYI                                            *
'*  Notice  : Copyright (c) 2016 FEEL FREE TO SHARE AND MODIFY  *
'*          : All Rights Reserved                               *
'*  Date    : 10/11/2016                                        *
'*  Version : 1.0                                               *
'*  Notes   : read adres 10 bit and display result in 4 led     *
'*          :                                                   *
'****************************************************************
'16f676 analog test
'use registers

'TRISA
'TRISC
'PORTA
'PORTC
'ADCON0
'ADcon1
'ANSEL
'ADRESL
'ADRESH
'RESS WORD SIZE VAR

'display leds are attached to RC0 to RC3
     
TRISA=000001    'RA0 is analog input
TRISC=000000    'PORTC is OUTPUT
ANSEL=000001    'AN0 channel 0 is selected

led0 var PORTC.0    '4 display leds
led1 var PORTC.1
led2 var PORTC.2
led3 var PORTC.3

RESS var word      '16 bit variable to store both ADRESL AND ADRESH

ADCON1=000000   'ADCS is Fosc/2
ADCON0=%10000001   'right justify, AN), ADON

loop:
        ADCON0=%10000011
        pause 10
        if ADCON0.1=0 then show
        goto loop

show:              'just testing it is working or not
        RESS=ADRESL
        RESS.8=ADRESH.0
        RESS.9=ADRESH.1
        pause 500
       
        if RESS<256 then display_255
        if ress>256 and REss<511 then display_510
        if ress>510 and REss<788 then display_765
        if ress>785 and REss<1024 then display_1023
        goto loop

display_255:
            high led0
            pause 50
            goto loop

 display_510:
             high led1
             high led0
             pause 50
             goto loop
 display_765:
             high led1
             high led2
             HIGH led0
             pause 50
             goto loop
            
 display_1023:
             high led1
             high led2
             high led3
             HIGH led0
             pause 50
             goto loop  
                
            
             end         'END OF CODING         


The codes are not perfect and  lengthly. I did not read the example codes of pbp. It is very helpful.                       









          

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