Matrix user forums

Hello there,

Ive spent the last couple of hours tinkering and playing with my new programmer... Now, I was wondering if I could make a simple oscillator with my development board, There are some timer options in the chip setup, but I dont really know how to use them... I can make an oscillator with a few capacitors etc, but I was hoping there could be an easier way... Also, at the moment... Im using a while loop with flowcode and turning the data pin on and off with a 200 ms delay.

Cheers

Hi Eddie,

You already have made an oscillator, flasing an LED is just that, the knight rider effect programme is effectively a port full of oscillators. Just vary the delays to make any oscillator speed you want up until (about) clock speed/4/4 which is probably around 1MHz.

That is the beauty of PIC's over conventional analogue electronics, all the varying of resistors and capacitors goes out of the window.

Could I suggest looking at the Flowcode tutorials in the learning centre. Working through these will take you a long way to understanding the benefits of E-blocks/Flowcode.

Mark

For a shorter delay you can use a C code block with the following command
then set up a variable in flowcode called var1 and give it a value. The C code block will then delay the value in the variable x 10 micro seconds.

Hello,

I was playing with my new programmer all last night and was making simple flowcharts for things like this:

Start
|
While 1
Output Port B 1
delay 1 sec
Output Port B 0
EndWhile
|
End

Although it doesn't have the desired affect....

Cheers

More than likely this is a configuration word setting problem. Make sure the config settings are appropriate for your hardware (especially the oscillator settings) and that the clock speed setting is correct.

Eddie,

You need two delays.

In your loop you have the LED out for about 10us or 0.00001 seconds, and on for 1 second.

Start
|
While 1
Output Port B 1
delay 1 sec
Output Port B 0
delay 1 sec <---------------
EndWhile
|
End

Ah Thankyou!

Cheers