Problem with WHILE - WEND

[Russ Kincaid]

I attached my program. Can someone tell me what is wrong with the highlited statement, and how can I accomplish the action?

[mister_e]

Use IF THEN instead

IF (Footsw=1) OR (Ready=1) Then Start

OR

While (FootSw=1) OR (Ready=1)
       LOW RENCA
       LOW EJECT
       WEND

[sayzer]

First:
Goto should not be used with "While" statement. Use "IF" instead.
ex:

IF Footsw=1 or Ready=1 then Goto Start

Second:
Your statement should have been as below.

While Footsw=1 or Ready=1
Goto start    'cant'be on the same line with While
Wend

[Russ Kincaid]

Thanks for the replies. I had tried IF - THEN but did not do that right either!

[mister_e]

1. Parenthesis are important in most case
2. I would never jump out of a WHILE statement using a GOTO. Using a flag or Validate the Conditions to get out of the WHILE/WEND loop is, IMHO, a better practice.

Could be also..

Start:
    LOW RENCA
    LOW EJECT
    While (FootSw=1) OR (Ready=1) : WEND

OR

Start:
    LOW RENCA
    LOW EJECT
    SpinHere: If (FootSw=1) OR (Ready=1) then SpinHere

You may notice that one method generate less code space than the other.

[Russ Kincaid]

Here is my problem: I tried the spinhere loop, it works but the following statements are a loop. I want the program to stay in the loop but as soon as either footsw or ready goes high, the program jumps back to the spinhere loop. I don't want it to do that. How do I do it?

[mister_e]

SpinHere:
    LOW RENCA
    LOW Eject
    While (FootSw=0) OR (Ready=0)    
          '
          '    Do your loop here
          '
          wend
    goto Spinhere

[Russ Kincaid]

I have not explained my problem properly: I want a momentary switch closure (footsw) to cause the program to jump to a loop (freq. I don't want it to jump out of the loop when the switch opens.