truck gate

[Melros]

The program i made is like this, but now it goes down when the gate have stoped.

trisb = %00001111
portb = 0

main:
pause 500
if portb.0 = 1 and portb.7 = 1 then 'portb.7 switch top'
goto down 'portb.0 is the sender-
endif
if portb.0 = 1 and portb.6 = 1 then 'portb.6 switch buttom'
goto up
endif
if portb.0 = 1 and portb.7 = 0 and portb.6 = 0 then
goto down
endif
goto main

down:
pause 500
portc.0 = 1 'c0 sends the port down,
if portb.0 = 1 then
goto stopp
if portb.6 = 1 then
portc.0 = 0
goto main
endif

up:
pause 500
portc.1 = 1 'c1 sends the port up'
if portb.0 = 1 then
goto stopp
endif
if portb.7 = 1 then
portc.1 = 0
goto main
endif

stopp:
portc.0 = 0
portc.1 = 0
if portb.0 = 1 then
goto main
endif
end

[Ioannis]

Yes it will go down or up instead of where you want to. I explained why. You can't expect synchonization that way. You will never know where the gate is every time.

Ioannis

[mackrackit]

I can think of three options.

This is all happening between the top and bottom switch.

1 - Remember direction of travel:
If the gate is going down, write a value to a variable or EEPROM so the after you stop the gate , the next time the button is pushed, read the stored value and have that value equal down. Use the same method but a different value for up.

2 - Toggle reverse/start/stop:
If the gate is in motion - push button to stop - remember the direction of travel. Push button again and the gate reverses.. If not going the way you want it to push the button two more times.

3 - GET ANOTHER BUTTON!

[Ioannis]

What about power failure?

Ioannis

[Melanie]

Geeze... a problem summarised in one short paragraph. The last one that landed on my desk was 27 pages deep...

So, you have a 1 Button Remote, to control a 2 Button application.

Press the Button momentarilly and the Gate goes UP. This means that for safety in an emergency it goes UP if you hit it.

If the Gate is already in motion (in any direction) when it receives a Button press, it STOPS.

Press the Button and HOLD it for at least 3 Seconds before releasing and the Gate goes DOWN.

If it's a Prison Gate, just reverse the priority...

30 seconds, done and dusted... and the next problem...

[mackrackit]

What about power failure?

Ioannis

Thats easy...The gate don't work!

[Ioannis]

Thats easy...The gate don't work!

:-) Good one! But I meant that the phase sequence will be lost on power failure.

Anyway Melanie gave the absolute solution. So, as she stated, next problem?

Ioannis

[Steve_88]

I have a question/problem.

Is there an effective way to deal with a person who doesn't know what they don't know?

Been driving me crazy for years.

-Steve