Trying to use a function or a sub to return a value on demand. Not working for

eagletalontim

This has to be something simple. I am attempting to call a function to fill a variable. This is in relation to my RPM detection post.

Here is a sample of what I am trying to do :

getrpm SUB 0

Main:
currentrpm = getrpm
' CODE TO DISPLAY RPM
...
...
...
Goto Main

getrpm:
...
...
...
RETURN rpm


What am I doing wrong? It is getting dark outside and I am running out of time to test this [noparse]:([/noparse]

JonnyMac

You have terms confused: SUBs aren't really intended to return values, though the can -- but to do so is sloppy programming (my opinion, yours may differ). Redefine like this:

GET_RPM         FUNC    1, 0

Then code the function like this:

FUNC GET_RPM
  ...
  RETURN RPM
  ENDFUNC

If the RPM value can be a word then you need to change the declaration to 2.

eagletalontim

what do you mean by declaration?

Bean

Typically SUBs don't return a value.
FUNCs do.

FUNCs are declared as:
name FUNC returnbytes, sendbytesmin{,sendbytesmax}

Bean

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That was on fire when I got here...

www.iElectronicDesigns.com

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eagletalontim

ok, two more questions

1st : Is there any way to detect ohms? Like if I had a potentiometer connected between ground and a pin, could the chip process the ohm rating or calculate it into a percentage? Example : 0 ohms = 100%, 100k ohms = 0%

2nd : Can a pin be programmed to have a gradual increase or decrease in voltage out?

Bean

1st: Use the RCTime command

2nd: Use the PWM command

Bean.

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Uhhhm, that was on fire when I got here...

www.iElectronicDesigns.com

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JonnyMac

Just a suggestion: don't change the topic of a thread mid-way through; makes it hard for people to find information when scanning topic titles.