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Rano, don't worry about Skimask. This is his own way to tell you...
Code:Hi : and: welcome : on : this : forum : . : We : are : glad : to : see : you : here : and : help : you : when : you : need : us : . : This : said : never : hesitate : to : ask : questions : . : Good : luck : !
Last edited by mister_e; - 28th March 2008 at 19:48.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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Good one...Originally Posted by mister_e
What I was getting at was the fact that the O/P said he 'found the code on the internet' and didn't know how to make it do what he needed it to do...suggesting that maybe the O/P dove in head first, maybe without so much as first creating a 'blinky' and working up from there. 'cause quite frankly, that fix up there a couple of posts back is a very basic fix (change should be the operative word here).
In other words, I think a fish has been given...and more fish might soon be handed out...
Last edited by skimask; - 29th March 2008 at 07:30.
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Don't you go stealing my fish, I'm not very good at sharing
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You got fish? Sounds like a slogan for something...Don't you go stealing my fish, I'm not very good at sharing
Got Fish?
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After studying applied reasoning I can't help but wonder if maybe I do.
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It's ok skimask, I understand what you're trying to say. I'm just new in the world of PIC and know nothing about it.Now I need to deal with PIC to finish my project. So, I just do reverse Engineering..study the codes given and learn how it function.
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Ok, now WHY does it work
All right I've seen this code a bit now and I have to admit I don't know WHY it works. I do know that may or may not work if you change the port (that's informative I know) which might be related to some weak pull up issue (?) or some other circuit design point I missed.
Here's the question - This code sets all values of the portD to zero
' Wait for keypress
For col = 0 to 3 ' 4 columns in keypad
PORTD = 0 ' All output pins low
TRISD = (dcd col) ^ $ff ' Set one column pin to output
row = PORTD >> 4 ' Read row
If row != $f Then gotkey ' If any keydown, exit
then changes the direction of one pin/column at a time to output instead of input. Great. The question is: why by simply changing the pin to output does the value of that pin go from low (portd=0) to high?
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