Latching an Input
Archiver
Posts: 46,084
Hello,
I am new to the group and have had great fun using my BS2-ic for various
things around my model railroad.
My Lionel model railroad is slowly becoming completely computer
controlled. I built custom PC boards that interface with track switches
and accessories.
I would like to activate some sort of "latched" or "interrupt style" input
that could catch an input on a pin and then I go see if it has changed in
the BS2 cycle. Or actually use an input pin as a program interrupt.
Is any of this possible?
Greg
I am new to the group and have had great fun using my BS2-ic for various
things around my model railroad.
My Lionel model railroad is slowly becoming completely computer
controlled. I built custom PC boards that interface with track switches
and accessories.
I would like to activate some sort of "latched" or "interrupt style" input
that could catch an input on a pin and then I go see if it has changed in
the BS2 cycle. Or actually use an input pin as a program interrupt.
Is any of this possible?
Greg
Comments
conductor@t... writes:
My Lionel model railroad is slowly becoming completely computer
controlled. I built custom PC boards that interface with track switches
and accessories.
I would like to activate some sort of "latched" or "interrupt style" input
that could catch an input on a pin and then I go see if it has changed in
the BS2 cycle. Or actually use an input pin as a program interrupt.
Is any of this possible?
Greg
You can use a thing called a RS flip flop. This device, once tripped will
remain in the "tripped" state unitl you "clear" it. If you need more detail or
device number, write back....
Ken
[noparse][[/noparse]Non-text portions of this message have been removed]
frequently and deal with them, otherwise proceed to your normal code.
Something like this:
Main:
DO
GOSUB Get_Inputs
IF (inBuf > 0) THEN
' handle inputs
ENDIF
' high-level task manager
ON task GOSUB Task1, Task2, Task3 ...
task = task + 1 // NumTasks
LOOP
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: Greg McMurry [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=5lj27YQiVlBIQRAgIck8H4f-U7QqXszmN83KavYmCOcmAudr25XB9XEeqjGkpCY-L3L7Y9esDWsVeO41CQ]conductor@t...[/url
Sent: Friday, August 29, 2003 2:11 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Latching an Input
Hello,
I am new to the group and have had great fun using my BS2-ic for various
things around my model railroad.
My Lionel model railroad is slowly becoming completely computer
controlled. I built custom PC boards that interface with track switches
and accessories.
I would like to activate some sort of "latched" or "interrupt style"
input
that could catch an input on a pin and then I go see if it has changed
in
the BS2 cycle. Or actually use an input pin as a program interrupt.
Is any of this possible?
Greg
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