AW: AW: [basicstamps] inA and for next

Archiver

helps a very big deal. I love NCD! actually that was the thing I have been
searching for more than once.

THANKS! Uli

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Urspr

Archiver

Hi Tracy,

NCD works great, thanks. But to find out if another sensor is touched at
vthe same time too I thought of another way. Maybe you could comment on the
idea and give me some advice?

OK, lets say sensor No. 5 detects. My puppett will start talking (yes, hold
my hand...)and that gives me time to check if any other sensor is on too.

My idea was to check the port again and exclude pin No. 5 by some boolean
voodoo that you might know about. In other words how could I tell the stamp
to "read all bits except number five" ? If I could do that I would not have
to go down to the last bit and repeat the ceremony. If the puppet could say
"no, please only one hand, not both" that would be OK for a start. If I
really want to know more I could repeat the routine excluding left AND right
hand and see if there is more. If so, the puppet would just say, "no please
take your hands off, lets start once again" .

I think it should be not to hard to do in boolean logic but of course I
donot know how :-)

Thanks, Tracy, and have a nice day!

Uli

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Urspr

Archiver

>My idea was to check the port again and exclude pin No. 5 by some boolean
>voodoo that you might know about. In other words how could I tell the stamp
>to "read all bits except number five" ?

You can use a mask to exclude whatever pins you want. A mask like
$0fff excludes bits 12 to 15, and includes bits 0 to 11. The mask
can be made to follow the input conditions. For example, in the
following little program, the mask changes each time you press a
button, to exlude that button. The program finishes as soon as you
have press all of the buttons at least once.

' pins p0 to p11 go high in respons to buttons
X var word
mask var word
mask=$0fff
loop:
debug home,bin12 mask
X = ins & mask
mask = mask & ~X
if mask then loop
debug "cr,"you have pressed all keys"
mask


The mask math goes something like this. Say you first press button #5.
Then X = %0000000000100000
Then ~X = %1111111111011111 "`" is stampese for NOT
When ~X is anded ("&") with the current mask (%0000111111111111), the
result is mask=%0000111111011111, effectively excluding button 5 from
the next iteration. Okay, it's a stupid program, but you get the idea.

-- Tracy