Using buttons

Steve-O

I'm trying to make a servo activate by a button push. So far it's not going well... I'm using the BUTTON command inside a loop in main. When the button is activated it goes to an outside function in order to activate the servo. Here is the code I have so far...it clears the tokenizer and I have inserted several debugs inorder to see where the program is at. Disregard the counter...that's for a later project (which im sure I'll need help on too..haha)
If all this looks ok, how do you go about the circuit for this?

dandreae

You may be able to use an "IF THEN" command based on the condition of the input pin.· Example:

Do

·IF IN1=1 THEN Arm_Servo

Main:
· DEBUG "main 1",CR
· DEBUG "counter modulus: ", SDEC counter // 2 ,CR
· DO
· PAUSE 1000
· BUTTON Btn, 0, 255, 20, btnWrk, 0, Arm_Servo
· DEBUG "main 2",CR
· LOOP


Arm_Servo:
· DEBUG "arm 1",CR
· IF counter // 2 > 0 THEN x = 260 ELSE x = 1240
··· ra = 7: ch = 11
··· pw = x
··· DEBUG "pulse width: ", SDEC pw,CR
··· SEROUT Sdat, Baud+$8000,[noparse][[/noparse]"!SC",ch,ra,pw.LOWBYTE,pw.HIGHBYTE,CR]
··· PAUSE 1000
··· pw = 760
··· DEBUG "pulse width at rest: ", SDEC pw,CR
· counter = counter + 1
· DEBUG "counter: ", SDEC counter,CR
RETURN

Dave

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Dave Andreae

Tech Support
dandreae@parallax.com
www.parallax.com

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