How to make working one HCTL2016 and a PIC16F876

[hawk72501]

Hi to everyone! I am a newbie at PIC16F876 and i have a project to make(that's why i am not swimming at a beach now!snif,snif)

The problem is the following:
I have an incremental encoder (AGI HEDL-5540 A11) connected with a motor (maxon).And i want to take the pulses that the encoder sends and save it as a number in the PIC16F876. Somebody told me that HCTL2016
makes that.Reading the manual i made the right connections but i am stuck with the code in PIC that is required.Every pin like PORTB.0,PORTB.1..... have 0 or 1 as i understood.But iam save it as a whole number in 1 register!And the manual says that HCTL2016 is 16-bit.So must it the number of a position be send in two cycles?Please help me!

I would really really...appreciate if you could give me some bit of code to understand.Thanks anyway in advance

[mister_e]

mmm, can you tell more about what you want to do with the rotary encoder???

i'd never use this IC and i believe we can remove it and connect the encoder directly to the PIC.

I often use rotary encoder in my apps to navigate between menu and/or get user entry. So an extra IC should be motivated by something that i don't see/understand.

Bellow is one example to use rotary encode to increment/decrement a variable

    ' Procedure to get value change from rotary encoder
    '
    OldPos = (PORTB & %11000000)>>6 ' get only PORTB<7:6> bits
    NewPos = OldPos 
    
    ' see if encoder has move
    ' 
    while ((NewPos==0) or (NewPos==3)) 
       NewPos = (PORTB & %11000000)>>6 ' get only PORTB<7:6> bits
       wend
    
    pause 20 ' debounce delay
 
    ' Get encoder movement
    ' --------------------
    '
    '      Rotary encoder output table (clockWise rotation):
    '      -------------------------------------------------
    '             00
    '             01 between move (half detent)
    '             11
    '             10 between move (half detent)
    '
    '     Using XOR
    '
    '               OldPOS   : 0     0     3     3
    '               NewPos   : 1     2     1     2
    '               movement : CW   CCW   CCW    CW
    '           XOR -------------------------------
    '                          1     2     2     1
    '
    ' So, if NewPos XOR OldPos = 1 => increment
    '        Newpos XOR OldPos = 2 => Decrement    
    '
    Newpos=newpos ^ oldpos 
    select case newpos

           case 1
               menuchoice=menuchoice+1

           case 2
               menuchoice=menuchoice-1

     end select

[hawk72501]

Thanks for answering.I don't want nothing extreme.Just to have a number in PIC16F876(for example 16 degrees or 352.16 degrees,something like that) how many degrees the motor turned. The concept is to make a PD controller.But in order to make the PD controller i must subtract the desire degrees of rotating the motor (turn 5 degrees) with the actual.And i want to control the actual degree.The first i made it with a SERIN2.They said to me that the encoder gives pulses and in order to make them 0 or 1 i must have the HCTL.Is that wrong?

i really didn't understand much from your code (f.e what is >>6).Can you be please more specific?Sorry but i am now beginning....

[NavMicroSystems]

hawk,

I'm sorry I have to say this,
but how about having a look at your chips datasheets and the PBP Manual?

i.e.
"<<" and ">>" are described in Section 4.17.3 of the Manual