Newbie help. RGB Led on a PIC10F202

[brianmorris]

I connected a 10k resistor from VCC to GPIO.3 and then the button is still connected to GPIO.3 and GND. Push the button, the color changes, but still the same as above.

[sayzer]

Your LEDs are conected to Vdd instead of GND.
And GPIO is set to 0, so initially all pins are low at the beginning and thus LEDs are on.
When a PWM cycle is done, the pin stays low again and the LED is still on.

I am guessing Steve forgat to add these in his last posted code above.


Before "pwm ButtonCount,127,100", insert these:

HIGH RED
HIGH GREEN
HIGH BLUE

So the new code will be as below:

MAIN:
 
        IF !SwitchPin THEN                              ' Switch down?
 
                                                        ' - YES
 
                If ButtonCount = 3 THEN ButtonCount = 0 ' - Currently on GP3 (MCLR)?  If so, pass go, claim 200$ 
 
                HIGH RED
 
                HIGH GREEN
 
                HIGH BLUE       
                pwm ButtonCount,127,100                 ' - Light Show
 
                WHILE !SwitchPin : wend                 ' - Spin 'till button is released
 
                pAUSE 50                                ' - arbitrary debouince delay
 
                ButtonCount = ButtonCount + 1           ' - Point to next LED
 
                endif                                   ' 
        GOTO MAIN

[brianmorris]

I have one RGB LED with a common anode thats hooked up to VDD. The individual pins are connected to the I/O ports on the chip. I entered in the code above but all colors are still on. The even funnier part is i even commented out those lines including the PWM line and all three are still on. I commented out just the PWM line, same thing. I even erased the chip, verified erase and reprogrammed.

[sayzer]

cmcon0 = 0

[brianmorris]

Error[113] c:\pbp\pbppic12.lib 423 : Symbol not previously defined (CMCON0). A have a whole bunch of these.

[Bruce]

The 10F202 doesn't have a CMCON0 register so leave that out.

See if this works;

@  __config _WDT_OFF & _MCLRE_OFF & _CP_OFF
 
  Red       var GPIO.0
  Green     var GPIO.1
  Blue      var GPIO.2
  SwitchPin var GPIO.3  ' Active low
 
  RD CON %11111110  ' red
  GR CON %11111101  ' green
  BL CON %11111011  ' blue
  YL CON GR & RD      ' green + red = yellow
  CY CON GR & BL      ' green + blue = cyan
  PR CON BL & RD      ' blue + red = purple
  WT CON GR & BL & RD   ' green + blue + red = white
  OF con %11111111  ' all LEDs off
 
  ButtonCount VAR BYTE
 
  OPTION_REG = %00000000  ' GPIO.2 for GP use
  TRISIO = %00001000  ' GP3: Input, other pin: Output 
  GPIO = %00000111    ' LEDs off
  ButtonCount = 0
 
MAIN:
  IF !SwitchPin THEN                         ' Switch down?
     WHILE !SwitchPin : wend                 ' - Spin 'till button is released
     PAUSE 50                                ' - arbitrary debouince delay 
     ButtonCount = ButtonCount + 1
 
     SELECT CASE ButtonCount
       CASE 1 
         GPIO = RD
       CASE 2 
         GPIO = GR
       CASE 3 
         GPIO = BL 
       CASE 4
         GPIO = YL 
       case 5
         GPIO = CY
       case 6
         GPIO = PR
       case 7
         GPIO = WT
       case IS > 7
         GPIO = OF
         ButtonCount = 0
     END SELECT
 
  ENDIF
  GOTO MAIN
  END

The PWM command returns the output pin to an input after it finishes so that might be causing some funkiness. Try just placing color values on the port and see if this helps.

[brianmorris]

Switch works. Just not following the colors you have in each of the case statements. In order of presses in goes: Red, Green,Blue, Yellow for a split second, White, Cyan, Red, No White then cycles over again as it should.

We are getting closer though and very much appreciate this. This is my first project with any of PIC MCUs as well as my first with PICBASIC Pro.