Newbie Help with a code problem

[Keith]

Hi again. Could someone please help me out with this one.

I am trying to set up an a pair of ports which will read the pins and select a subroutine bit I am simply running around in circles. My code compiles but it does not run on the chip.

if select_1 =0 and select_2 =0 then
Option = routine_1
End if

if select_1 =1 and select_2 =0 then
option = routine_2
end if
if select_1 =0 and select_2 =1 then
option = routine_3
end if
if select_1 =1 and select_2 =1 then
'option = routine_3
'end if

what I want it to do is to use whichever sub routine is selected.

Once again any help would be appreciated

[Nobody/Anonymous]

if select_1 =0 and select_2 =0 then
routine_1    '(routine_1  is the name of the SUB used)
End if
etc.

[Keith]

Hi and thank so much for your reply.

I'm not too sure as to how to implement your recommendation. Perhaps it has been the way I have presented my problem.

I have elaborated the problem below :

if select_1 =0 and select_2 =0 then
Option = routine_1
End if

if select_1 =1 and select_2 =0 then
option = routine_2
End if

if select_1 =0 and select_2 =1 then
option = routine_3
End if

if select_1 =1 and select_2 =1 then
option = routine_3
End if

Main:

If trigger = 1 Then
Call option
End If

Goto Main

Sub routine_1

'Tone sequence goes here

end Sub

I have several extensive  tone routines which I have embedded into Sub routine_1  to  Sub routine_4

I want to be able to preselect the Sub routine (n) then trigger it with trigger input.

The problem I am having is as I see it, is I  want the variable called ‘option’ to carry the value of  the preselect be it routine_1, routine_2 etc. etc.

Or am I going the wrong way of around it???

[mmotte]

In GCBasic on line Help lookup Keyword "Select"  as in  select case.  this works like a series of 'if's.

Also you may have them but you did not include them in the example.
   Need to tell the processor and speed
   need to setup  the port directions
you need to set up a loop so if  you change the select_in  bits then the tones will change to another routine

73
mike
  

[Keith]

Thank you so much for your reply. I managed to get this up and running in a fashion late last night by changing the trigger statement 'If trigger = 1 Then' to a line which reads,

'If trigger = 1  And 1 =0 and select_2 =0 Then
routine_1
End If

It works but it is messy.

I will research that 'Select' information you have given me. (thank you once again).

Yes, I missed the chip info and definitions from the post for the sake of brevity.

[Nobody/Anonymous]

You could use nested if - else statements like this -

if trigger = 1 then
    if select_2 = 0 then
        if select_1 = 0 then
            routine_1
        else
            routine_2
        end if
    else
        if select_1 = 0 then
            routine_3
        else
            routine_4
        end if
    end if
end if

That would probably result in smaller code than testing all three bits for each routine.

[Nobody/Anonymous]

The testing of the 3 bits can be very simple with the 'select case statement.
First use 3 adjacent bits on one port.,, like the  the lower three bits of PortA.  0,1,2
Then read the portA   and "mask " it with  AND b'00000111' which will allow only the lower three bits through.

example:

Mode =1

do
Mode = PortA & b'00000111'

     SELECT CASE Mode

    CASE 1
        GOSUB Measure

    CASE 2
        GOSUB AdjLowFreq

     END SELECT
  wait 100 ms
loop

If you took a programming course,  this is called a "dispacher".

73
Mike