simple flashlight LED - NEW to pic 12f629 -

[astanapane]

hello all,

i'm very happy that i found you site. I'm very new to PbP programming. Actually i have very basic knowledge and would like ta have some help if you have time.

So lets start from what i have in mind to do.

1)I would like to use at first the PIC12f629.

2)I need to use one button.

3)and one LED

Now.... i want to press the button and light the LED on 10 % of brightness

then to press it again and light it to 50 % and then press again and light it to 100%

At the end if i press it once more to turn off the LED.

Actually if it is simple enouph i would like to turn the led off if i press the button more that 3 seconds.

If this is very difficult to do please do not be bother to help me i dont want to disturb you. But if anyone have time i would be very please.

What i have done till now is not a lot.

I have turned on an LED and turned off.

Then i can use PWM GPIO.0,a + 1,2 to light the LED but none more.

I have also an other problem that i cannot turn on with PWM command more that one GPIO.

For example i would like to turn on the LED from 0 to 255 and then from 255 to 0 but on the port GPIO.0, GPIO.1 and GPIO.2, how can i do that?

Thank you very much for your help in advance.

Best Regards

astanapane.

[mackrackit]

Welcome to the forum.

Lets look at the counting part first.
You will need a variable
CNT VAR BYTE

Then when ever the button is pressed
CNT = CNT + 1

IF CNT equals x then z.

Here is a similar thread you may want to read
http://www.picbasic.co.uk/forum/showthread.php?t=13744

[astanapane]

thank you very much.

I will check - read and come back.

[astanapane]

On the following code, which the 100% i took it from the link you already gave me, i manage to place my won PWM code.

The problem is that i cannot make the LED to stay at the specific brightness i gave to the PWM.

Also at the moment it is also difficult for me to place more than one britghness.

As i told you i would like to make the button to control one led but when i press once the button to have 10% of brightness then press again and have 50% and then pressed again 100%.

If there is any help for this please, and i will keep trying to understand better the sequence of debounch.

thank you again for your help.

Best regards.

INCLUDE "bs1defs.bas"

DEFINE OSC 4


cnt VAR BYTE
delay var byte

boton VAR GPIO.2
led VAR GPIO.1

ANSEL = 0 '12F675 for test
CMCON = 7
OPTION_REG.7= 0 'Pullups enabled
WPU = %00000100

steps VAR WORD
cycles CON 2

cnt = 0
GPIO = %00000110 ' Nosurprise startup ...
TRISIO = %00000100 ' GP2 as input and set GP 0,1,3,4,5 as outputs

'************************************************* *****************************
Detect: 'Button presses W/Debounce
'
delay = 0
BUTTON Boton ,1,255,0,delay,0,pressed
'Pin,Down,Delay,Rate,BVar,Action,Label
' Slow Things down
GOTO Detect
'************************************************* *****************************
Pressed: ' Some > 10ms press detected
IF cnt <=1 Then 'tocount uptu 3, bigger values will add up.

cnt = cnt + 2

ELSE

cnt = 0
For steps=0 TO 100
PWM led,steps,cycles
Next
'in here what can i type in order the LED to stay at the specific brightness???
ENDIF

WHILE !Boton : WEND ' Wait Boton release !!!
goto detect

END

[astanapane]

itried to do the following.

i have to buttons...one increase the brightness and the other decrease the brightness.

but is not very smooth. I have also a problem to turn off the LED.

For remind you, i need a code for making a flashligh like this:

@ DEVICE  PIC12F675,INTRC_OSC_NOCLKOUT ' internal RC osc
@ DEVICE  PIC12F675,MCLR_OFF           ' Disable external MCLR
@ DEVICE  PIC12F675,WDT_OFF            ' Disable WatchDog timer
@ DEVICE  PIC12F675,PROTECT_OFF        ' Disable device protect
@ DEVICE  PIC12F675,CPD_OFF            ' Disable Code-Protect
INCLUDE "bs1defs.bas"
ansel = 0            
GPIO = 0
TRISIO = %00001100 			' GP2 as input and set GP 0,1,3,4,5 as outputs
CMCON  = 7
ADCON0 = 0 ' A/D off      

signal VAR BYTE
signal=5
Start:
      IF gpio.2=0 THEN
         signal=signal+1
         IF signal>10 THEN signal=10 
         pause 150
      ENDIF
      
      IF gpio.3=0 THEN
         signal=signal-1
         IF signal=255 THEN signal=0
         pause 150
      ENDIF      
      
      HIGH gpio.0
      PAUSE signal
      LOW gpio.0
      PAUSE (10 - signal)
      GOTO Start
END

you can see also there people trying....

http://www.candlepowerforums.com/vb/...d.php?t=192206

[mackrackit]

Here is something more. You will need to refine it.

    CNT VAR BYTE
    BUT VAR GPIO.2
    LED VAR GPIO.1
    cnt = 0
      
    CHECK:
    IF BUT = 0 THEN TICK
    GOTO CHECK   
    
    TICK:
    PAUSE 100
    CNT = CNT + 1
    IF cnt = 1 THEN DIM
    IF cnt = 2 THEN BRIGHT
    IF CNT => 3 THEN LED_OFF
    GOTO CHECK
    
    DIM:
    PWM LED,75,100  
    IF BUT = 0 THEN TICK
    GOTO DIM
    
    BRIGHT:
    HIGH LED
    PAUSE 100
    IF BUT = 0 THEN TICK
    GOTO BRIGHT
    
    LED_OFF:
    LOW LED
    PAUSE 250
    CNT = 0
    GOTO CHECK
    
    end

[astanapane]

Thank you mackrackit,

i will try the code later and let you know. When i finish the circuit and the code i will post it here.

Regards