• A little Quiz game (Two players + audience) with PIC12F675

    This is a little Quiz game requested by my little son to use in his classroom, there are 4 pushbuttons, one for each player ("Red Player" and "Blue Player") and the other two ("Correct" and "Incorrect" answer) are for the teacher. You can use a RGB LED (Red player, Blue player an Green audience) or three separate LEDs.

    The interesting part of this little and silly project is the use of an analog input to check the status of two pushbuttons.

    The schematic is included in the source code you can add a 9v bat. with a 7805 regulator and an on-off switch.

    Enjoy.

    Errata: Ops!, there is a 1k pullup resistor missing in the schematic, so please add this to the pin 4...

    Code:
    '****************************************************************
    '*  Name    : MaraTron+12F675                                   *
    '*  Author  : Ivan Rosales, Guadalajara México                  *
    '*  Notice  : Copyright (c) 2011 Ivan Rosales                   *
    '*          : All Rights Reserved                               *
    '*  Date    : 27/08/2011                                        *
    '*  Version : 1.0                                               *
    '*  Notes   : Quiz Game (Two Players + Audience)                *
    '*          :                                                   *
    '*
    '*
    '*             Vdd
    '*              +
    '*              |
    '*              |
    '*             .-.
    '*             | |                     PIC12F675
    '*             | |1K                    ___      Red
    '*             '-'                   -o|°  |o-   LED   Green
    '*              |            .--------o|   |o---->|-.   LED    Blue
    '*         .----o----o-------)--------o|   |o-------)--->|-.   LED
    '*         |         |       |      .-o|___|o-------)------)--->|-.
    '*       | o       | o       |      |               |      |      |
    '*     |=|>      |=|>        |      |               |      |      |
    '*       | o       | o   Red |  Blue|               |      |      |
    '* Correct |Incorrect|       |      |               |      |      |
    '*         |         |     | o    | o               |      |      |
    '*         |         |   |=|>   |=|>                |      |      |
    '*         |         |     | o    | o               |      |      |
    '*         |        .-.      |      |               |      |      |
    '*         |        | |      |      |               |      |      |
    '*         |        | |1K    |      |               |      |      |
    '*         |        '-'      |      |               |      |      |
    '*         |         |       |      |               |      |      |
    '*         |         |       |      |               |      |      |
    '*         '----o----o-------o------o---------------o------o------'
    '*              |
    '*             ===
    '*             GND
    '****************************************************************
    @ Device PIC12F675,WDT_ON,PWRT_ON,PROTECT_OFF,MCLR_OFF,BOD_OFF
    ansel=%00111000     'Use GP4/AN3 (Pin 3) as analog input
    adcon0 = %00001101
    cmcon=7             'Don't use analog comparator
    trisio=%111000      '
    option_reg=0        'Enable Pull-Ups
    wpu=$FF             'Config Pull-Ups (GP3 DOESN'T have Pull-Up)
    
    DEFINE ADC_BITS 10 
    DEFINE ADC_CLOCK 3 
    DEFINE ADC_SAMPLEUS 50 
    
    'Definitions
    Rojo         VAR GPIO.0 
    Verde        var GPIO.1
    Azul         var GPIO.2
    Bot1         var GPIO.3
    Bot2         var GPIO.5
    Todos        var bit
    Cont         var byte
    Tiempo       var byte
    SiNo         var word
    
    gpio=0    'Turn off LEDs
    todos=0
    
    Pral:
    gosub do_adc   'Get ADC reading
    
    if !bot1 and !rojo and !Azul then     'If "Red" player is the fastest
    high Rojo
    gosub do_shuffle
    endif
    
    if !bot2 and !Rojo and !azul then     'If "Blue" player is the fastest
    high Azul
    gosub do_shuffle
    endif
    
    if sino=0 then                        'If the "Answer" is correct 
    gpio=0
    todos=0
    endif                   
    
    if sino=1 and !todos and (rojo or azul)then    'If the "Answer" is incorrect (First player fails)
    toggle azul
    toggle rojo
    repeat
    gosub do_adc
    until sino=3
    todos=1
    endif
    
    if sino=1 and todos and (rojo or azul)then    'If the "Answer" is incorrect (Both players fails)
    low azul
    low rojo  
    high verde                                    'Turn On Green (It's the audience turn's)
    repeat
    gosub do_adc
    until sino=3
    todos=0
    endif
    
    if sino=1 and verde then    'If the "Answer" is incorrect (Both players and audience fails)
    gpio=0
    repeat
    gosub do_adc
    until sino=3
    todos=0
    endif
    
    goto pral
    
    Do_ADC:
    PAUSEUS 50           ' Wait for A/D channel acquisition time
    ADCON0.1 = 1         ' Start conversion
    WHILE ADCON0.1       ' Wait for it to complete
    WEND
    sino = ADRESH>>6
    return
    
    Do_Shuffle:          'Just a little dramatic effect ;)
    tiempo=50
    for cont = 1 to 32
    toggle rojo
    toggle azul
    pause tiempo
    tiempo=tiempo+5
    next cont
    return
    
    end
    This article was originally published in forum thread: A little Quiz game (Two players + audience) with PIC12F675 started by ivanrosales View original post