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

Hallo everybody,

I have a dubt about interrupt configuration. I need to fix a SX28p to accept 3 external signal (from 3 proximity sensors). For every edge I have to check a counter value to define the time between pulses. 
I got the following code from SX-KEY help file. I think this is enough to detect the external pulses from the sensors. 


[code]
' -------------------------------------------------------------------------
' Program Description
' -------------------------------------------------------------------------
'
' 
' -------------------------------------------------------------------------
' Device Settings
' -------------------------------------------------------------------------

DEVICE          SX28, OSC4MHZ, TURBO, STACKX, OPTIONX
FREQ            4_000_000
ID              "ISRPORTB"

' -------------------------------------------------------------------------
' IO Pins
' -------------------------------------------------------------------------

Buttons         VAR     RB                      ' button inputs
TRIS_Btns       VAR     TRIS_B


' -------------------------------------------------------------------------
' Constants
' -------------------------------------------------------------------------


' -------------------------------------------------------------------------
' Variables
' -------------------------------------------------------------------------

sensor          VAR     Byte                    ' sensor conneted to RB.0, RB.1 and RB.2 
A                 VAR     Word
counter1       VAR     Word
counter2       VAR     Word
counter3       VAR     Word

' -------------------------------------------------------------------------
  INTERRUPT
' -------------------------------------------------------------------------

ISR_Start:
  WKPND_B = sensor                              ' get which sensor cause the pulse

Ch1:                                            ' check channel
  IF sensor <> %0001 THEN Ch2                   ' if not, try next
  A=counter1
  conter1=0
  GOTO ISR_Exit

Ch2:
  IF sensor <> %0010 THEN Ch3
  A=counter2
  conter2=0
  GOTO ISR_Exit

Ch3:
  IF winner <> %0100 THEN Ch4
  A=counter3
  conter3=0
  GOTO ISR_Exit

ISR_Exit:
  WKEN_B = %11111111                            ' no ISR until reset
  RETURNINT

' =========================================================================
  PROGRAM Start
' =========================================================================

' -------------------------------------------------------------------------
' Program Code
' -------------------------------------------------------------------------

Start:
  
  WKPND_B = %00000000                           ' clear pending
  WKED_B = %00000111                            ' falling edge detect
  WKEN_B = %11111000                            ' use bits 0..3 for inputs
  END

[/code]

Now I don't know How can I use the internal interrupts to incremement the counters (counter1, counter2 and counter3: 1 for each sensor).

In SX-KEY help file  I found the following code to repeat a function a specific times for second:

[code]
' -------------------------------------------------------------------------
  INTERRUPT 77_000
' -------------------------------------------------------------------------

ISR_Start:
  INC counter1 
  INC counter2 
  INC counter3 

  RETURNINT


[/code]

How can I have both kind of interrupts in one program??? I'm not sure I can do this.
Any help will be apreciate.
Thanks in advance


Loojade

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