In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ALTITUDEAP wrote:

Can anyone point me in the right direction for debouncing the kepad example in the SX/B help file
 



[code]
GET_KEY:
  tmpB1 = 0                                     ' reset keyboard value
  Keys = %0000_0111                             ' activate first row
  TRIS_Keys = %1111_0000                        ' refresh IO state
  PLP_Keys = %0000_1111                         ' pull-up input pins

  FOR tmpB2 = 1 TO 4                            ' scan four rows
    IF Col1 = Yes THEN EXIT                     ' check buttons on column
    INC tmpB1                                   ' update key value
    IF Col2 = Yes THEN EXIT
    INC tmpB1
    IF Col3 = Yes THEN EXIT
    INC tmpB1
    IF Col4 = Yes THEN EXIT
    INC tmpB1
    Keys = Keys >> 1                            ' select next row
    Keys = Keys | %0000_1000                    ' clear previous row
  NEXT
  RETURN tmpB1
[/code]
This is the pertinate code snippet i believe.  I know that i need to sample the value and make sure that i get the same value for atleast a 2 cycles.  
 

Any body done this before?

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