Prop I/O question very basic

mikediv

Hi guys I decided to back up and go the very beginning to learn Spin, please take a look at this code for me..

""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
'' From Parallax Inc. Propeller Education Kit - 4: I/O and Timing Basics Lab

'' File: ButtonToLed.spin
'' Led mirrors pushbutton state.

PUB ButtonLed ' Pushbutton/Led Method

dira [noparse][[/noparse]6..9] := %1111 ' makes pins outputs
dira [noparse][[/noparse]21..23] := %0000 ' P21-23 → input (this command is redundant)

repeat ' Endless loop

outa [noparse][[/noparse]6..9] := ina [noparse][[/noparse]21..23] ' Copy P21 input to P6 ouput

It works but not how I want it to, I can push each button and it will light up and LED in sequence but what I want it to do is every time I push an input button I wan tit to light up a whole group of pins, so push any button I am using 21-23 and it will turn on prop Pins 6-9 all at the same time ?? Is this possible to do can someone please show me an example. I can even make it simpler.. just use Prop Pin 21 as an input I want to be able to push that button and have it turn on a group of LEDS at the same exact time instead of just one at a time, so push button connected to pin 21 and Prop pins 6,7,8,9 all turn on at the same time ,, thank you

Bill Henning

if (ina[noparse][[/noparse]21..23])
   outa[noparse][[/noparse]6..9]~~

should do what you want

mikediv said...
Hi guys I decided to back up and go the very beginning to learn Spin, please take a look at this code for me..

""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
'' From Parallax Inc. Propeller Education Kit - 4: I/O and Timing Basics Lab

'' File: ButtonToLed.spin
'' Led mirrors pushbutton state.

PUB ButtonLed ' Pushbutton/Led Method

dira [noparse][[/noparse]6..9] := %1111 ' makes pins outputs
dira [noparse][[/noparse]21..23] := %0000 ' P21-23 → input (this command is redundant)

repeat ' Endless loop

outa [noparse][[/noparse]6..9] := ina [noparse][[/noparse]21..23] ' Copy P21 input to P6 ouput

It works but not how I want it to, I can push each button and it will light up and LED in sequence but what I want it to do is every time I push an input button I wan tit to light up a whole group of pins, so push any button I am using 21-23 and it will turn on prop Pins 6-9 all at the same time ?? Is this possible to do can someone please show me an example. I can even make it simpler.. just use Prop Pin 21 as an input I want to be able to push that button and have it turn on a group of LEDS at the same exact time instead of just one at a time, so push button connected to pin 21 and Prop pins 6,7,8,9 all turn on at the same time ,, thank you

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mikediv

Thank you Bill I am trying it out right now .. I have the prop education labs and fundamentals kit and its very good but it gives you the basic and then kind of leaves you wondering about the more advanced stuff. I never bought the prop manual does that pick up where the educational kit leaves off? every time you guys share examples its always many times more sophisticated than I would write even things like " dira [noparse][[/noparse] 1 ]:= 1 outa [noparse][[/noparse] 1 ]:= 1 you guys would do the same thing but use constants and stuff I don't know about how did you guys learn ??

Thanks again

Bill I tired it a few different ways it either turns all the leds on with no action on the push buttons or it does nothing here is one of the ways I tried it

PUB ButtonLed ' Pushbutton/Led Method

dira [noparse][[/noparse]4..9] := %111111 ' makes pins outputs
dira [noparse][[/noparse]16..18] := %000 ' P18-21 → input (this command is redundant)

if (ina[noparse][[/noparse]16..18])
outa[noparse][[/noparse]4..9]~~


repeat ' Endless loop


Thanks Mike , sometimes it just seems like some people have way more information than me, I am sure part of it is they are pro's and I am a neewb. But there is some very talented people here it gives me programmer envy lol

Post Edited (mikediv) : 11/20/2009 12:09:49 AM GMT

Mike Green

Read the Propeller Manual. It's downloadable for free. You can also learn a lot by going through other people's code and looking up (in the manual) things that you don't understand.

TrapperBob

The manual for the Propeller is available for free. It can be found in the Propeller Tool help menu as well as on the Parallax website for download.

··http://www.parallax.com/Portals/0/Downloads/docs/prod/prop/WebPM-v1.1.pdf

TrapperBob


·

nohab

You have to have the if-section in the endless loop, and you'd better have a else-section too.

repeat 
  if (ina[noparse][[/noparse]16..18])
    outa[noparse][[/noparse]4..9]~~ 
  else
    outa[noparse][[/noparse]4..9]~

Ariba

This makes it perhaps a little more clear, and extend the functionality:

dira[noparse][[/noparse]9..6] := %1111
if ina[noparse][[/noparse]16] == 1
  outa[noparse][[/noparse]9..6] := %1111
elseif ina[noparse][[/noparse]17] == 1
  outa[noparse][[/noparse]9..6] := %1010
elseif ina[noparse][[/noparse]18] == 1
  outa[noparse][[/noparse]9..6] := %0011
else
  outa[noparse][[/noparse]9..6] := %0000

Andy

mikediv

Thanks guys , this was a little ahead of my programing skills but while I Was doing the I/O lab I was surprised it didn't explain how to control multiple outputs with one input the code you guys shared is a very good example for me thanks again