Explain the below assembly program for pic

[rangerskm]

    #include"p16f73.inc"
    org 0x00
    bsf status,rp0
    movlw 0xff
    movwf trisa
    clrf trisb
l1: Bcf status,rp0
    movlw 0x05
    movwf adcon0
    btfsc adcon0,2
    goto $-1
    movf adres,0
    movwf portb
    goto l1
    end

this may be an adc program explain the program with the help of the adc sfrs

 

[umerhuzaifa]

this may be an adc program explain the program with the help of the adc sfrs[/QUOTE]

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Code ASM - [expand]
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#include"p16f73.inc"
    org 0x00
 
    bsf status,rp0          //for selecting 
                            //RAM addresses 80h-ffh by default
    
    movlw 0xff              //for selecting 
 
    movwf trisa             //port A an input port
 
    clrf trisb              //making port B an output port
 
l1: Bcf status,rp0          //for selecting 
                            //RAM addresses 00h-7fh by default
 
    movlw 0x05              //Turning ON the ADC
                            //however i think 0x01 could do the job too.
                            //here you are assigning 1 to the GO bit in the 
    movwf ADCON0            //ADCON0 which is not necessary
        
    btfsc adcon0,2          //Checking the status of DONE bit in ADCON0 (0 means ADC is
                            //has completed the conversion operation)
 
    goto $-1                // this should be l1. this will keep the control to the upper block
                            // of code until conversion is complete
 
    movf adres,0            // Move the contents of ADRES (converted data) register to 
                            // WREG (workign register)
 
    movwf portb             //Send the converted data from WREG to PORTB
 
    goto l1                 // Keep looping back to the upper block of code for
                            // next analog signal to be converted
    end

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