Question about Repeat and Quit

karakiko

Hello forum,
I am using the Parallax Serial Terminal to send ASCII strings to run a routine, the routine is :

PUB LedOnOff( num,value )
 repeat
  test2.writeLed1(0,0) 
  test2.writeLed1(1,250)
  test1.writeLed(1,250) 
  test1.writeLed(0,250) 
  WaitCnt(OneSecond + Cnt)

when i am writting in PST LednOnOff the routine is running and the program is working good, but sometimes i need·to quit from this loop, how·can i do this ?

Thanks in advance,
Karakik

pullmoll

karakiko said...
how can i do this ?

With the quit instruction. It leaves the level of repeat you are in and continues as if the repeat condition had expired. A repeat alone has the condition "always", but quit still leaves the loop.

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He died at the console of hunger and thirst.
Next day he was buried. Face down, nine edge first.

karakiko

Thanks , but how i can call quit to stop the repeat ?

Mike Green

Read the Propeller Manual section on the REPEAT statement and the QUIT statement. There are plenty of examples there.

pullmoll

karakiko said...
Thanks , but how i can call quit to stop the repeat ?

You will have some condition when to quit? If the name of that condition is test_quit, then you just do

PUB LedOnOff( num,value )
 repeat
  test2.writeLed1(0,0) 
  test2.writeLed1(1,250)
  test1.writeLed(1,250) 
  test1.writeLed(0,250) 
  WaitCnt(OneSecond + Cnt)
  if test_quit
    quit

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He died at the console of hunger and thirst.
Next day he was buried. Face down, nine edge first.

JonnyMac

You may need to do multiple tests if you're using nested repeat loops as I was in a recent project. I have a "background" process running that uses stacked repeat loops; the foreground can tell the process to terminate by setting a global flag; I had to include tests in both loops to get the correct behavior. It's not difficult, it's just a detail.

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Jon McPhalen
Hollywood, CA