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Coding a PIC help?

Discussion in 'Miscellaneous' started by Charvel, Sep 9, 2010.

  1. Charvel

    Charvel New Member

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    Hello.

    I'm trying to writing code for my gauges. I'll drive 7 seg led for gear indicator.I'm using MPLAB assembly and 16F877A.I thought a simple test program like this:

    PC send data for 7. gear
    PIC reads data and compares with given code (11111111)
    Then if it's the same data it turn on led 1, turn off led2
    PC send data for R gear
    PIC reads data and compares with given code (00000000)
    Then if it's the same data it turn on led 2, turn off led1


    Here is my code.

    Code:
    
  list p=16F877A
  include p16F877A.inc
  __config H'3F3A'

  alinan equ 0x20
  test equ 0x21
  org 0
  clrf PCLATH
  goto main

interrupt

  retfie

Hazirlik

  banksel TRISC 
  bsf TRISC, 7
  movlw 0x81
  
  movwf SPBRG
  movlw 0x26
  movwf TXSTA

  movlw 0x90
  bcf STATUS, RP0
  movwf RCSTA

  bsf STATUS, RP0
  bsf PIE1, RCIE
  bsf INTCON, PEIE
  return

karakter_al
  
  banksel PIR1
  btfss PIR1, RCIF
  goto $ - 1
  bcf PIR1, RCIF
  movf RCREG, W
  return

main
 
  call Hazirlik
  bcf INTCON, GIE

dongu

  call karakter_al
  movwf alinan
  
  movlw b'00000000'
  subwf test,w
  btfsc STATUS,Z
  goto gear_r

  movlw b'11111111'
  subwf test,w
  btfsc STATUS,Z
  goto gear_7

  goto dongu
  
  gear_r
  bsf PORTB,1
  bcf PORTB,2
  goto dongu

  gear_7
  bcf PORTB,1
  bsf PORTB,2
  goto dongu


end
    If you can guide me i'll be very glad :)
    Charvel, Sep 9, 2010
    #1
  2. Frakk

    Frakk Active Member

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    You are in the wrong forum. :D

    I don't think many of us are familiar with programming PIC's in assembly.
    Frakk, Sep 10, 2010
    #2
  3. Charvel

    Charvel New Member

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    What language are you using? Basic or C ? :)
    Charvel, Sep 10, 2010
    #3
  4. Frakk

    Frakk Active Member

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    I program AVR's in C.
    Frakk, Sep 10, 2010
    #4
  5. willynovi

    willynovi Member

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    you are right Frakk,
    Charvel, I think you should visit Microchip´s Forum for help.

    regards, Willy
    willynovi, Sep 11, 2010
    #5
  6. Charvel

    Charvel New Member

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    I'll try Microchip's website and i want to learn C.If you got an example code in C language it will be very helpful.

    Thank you for your help :)
    Charvel, Sep 14, 2010
    #6
  7. sdecorme

    sdecorme New Member

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    How do you communicate between your PIC and your PC : USB, 232,ethernet.
    You can find some free compiler for PIC C or basic . You should take a 18F or 30F series , they have efficient bootloader
    sdecorme, Jan 25, 2011
    #7
  8. tadythefish

    tadythefish Active Member

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    My Motion Simulator:
    3DOF, DC motor, Arduino
    isn't an arduino simpler to use?
    • Agree Agree x 1
    tadythefish, Oct 2, 2014
    #8
  9. narthur157

    narthur157 Member

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    I'd seriously consider using C. Assembly isn't something you should do to yourself if you don't have to
    narthur157, Mar 17, 2015
    #9