accessing memory location in PIC16f887

[charu2539211]

Hi

i am writing a code for pic 16f887 in assembly language which has to count how many times the porta0 is switched on and set the respective port to indicate it

loop:
first time a0=1 => b0=1
second time a0=1 => b1=1
third time a0=1 => b2=1
fourth time a0=1 => goto loop

when a0=0
portb= ffh

i tried it by myself, but only b0 is getting set every time i switch on a0.
can anyone suggest a proper alogrithm code it??

 

[jayanth.devarayanadurga]

Debounce delay not included in code. It will work if a 50 ms debounce delay is included.

 

[charu2539211]

where should i add the delay???

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can u write an algorithm for this??

 

[jayanth.devarayanadurga]

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Code C - [expand]
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if(a0 pressed){
    delay of 50 ms()
    if(a0 pressed){
        shift++;
            
    }
}
 
if(shift < 4)b = b<<shift;  //b is assumed as PORTB
else {shift = 0; b = 0;}

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[charu2539211]

i am using a push button. so each time i press and release the button, it has to select the appropriate bit to be set... how can i code this??