Timer Application

[charudatt]

Hello Once again,

I have a small application involving a Timer operation in which , on a press of a button , I have three LEDs that glow, The first LED switches off after 7 seconds, second LED switches off after 10 seconds and finally the third Switches OFF after 12 Seconds. The Duration of LEDs would change depending on different application.

I am interested in doing this with the On Board Timer and PIC Basic Pro Compiler.

Can anybody help me.

Thank you.

[electronicsuk]

You could quite easily use PAUSE and a FOR/NEXT loop, assuming you have other tasks to process as well as working the LED's.

Matthew

[Darrel Taylor]

This can be accomplished quite easily with the "Elapsed Timer Demo" found at http://www.picbasic.co.uk/forum/show...=&threadid=190

In fact, you can do a lot of other things with it too. Since this thread is getting so many "Views" I assume that's what most people are really looking for.

Darrel

[charudatt]

Thank you Darrel. I shall surely go thru it and get back to you.

[Dwayne]

Hello Charudatt,



Your program can use this example as a base,

It could look something like the following:

LED1 var GPIO.0 ; Or whatever pin works on your chip.
LED2 var GPIO.1
LED3 var GPIO.2

FirstLed var byte
SecondLed var byte
ThirdLed var byte
counter var byte


Loop:

;Here your source gives you the values of the LED's length of time to stay on....


FirstLed=7 ;these values you get from your source
SecondLed=10
ThirdLed=12

; Lets turn them all on!!!
High LED1
High LED2
High LED3

counter=FirstLed*1000
Pause(counter);
Low LED1;

counter=(SecondLed-FirstLed*1000)
Pause(counter);
Low LED2;

counter=ThirdLed-SecondLed*1000);
Pause(counter);
Low LED3;

Goto Loop