need clarifications

vinodkumar · Joined: 18 Oct 2005 Posts: 7 Location: Jabalpur

IF i declare the folowing bit variables as

Do

T1 = P2.2
T2 = P2.3
T3 = P2.4

'some code
Gosub Switch

Loop
End

'Press buttons routine

Switch:
Debounce T1 , 0 , Stevec1 , Sub 'UP
Debounce T2 , 0 , Mod , Sub 'DOWN
Debounce T3 , 0 , Stevec , Sub 'MODE
End If
Return

Do i get the real values of the Ports debounced or the T1, T2, T3. will this be reliable in sensing a switch closure

vasan · Joined: 21 Jun 2004 Posts: 13 Location: Chennai

You can do like this:

T1 Alias P2.2
T2 Alias P2.3
T3 Alias P2.4
'Do not include the above in the loop
Do
'some code
Gosub Switch

Loop
End

'Press buttons routine

Switch:
Debounce T1 , 0 , Stevec1 , Sub 'UP
Debounce T2 , 0 , Mod , Sub 'DOWN
Debounce T3 , 0 , Stevec , Sub 'MODE
End If
Return

' This should work basically. But if you need to wait until the key 'is 'released then see the application notes of mcs elec where you can find an excellent program.