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

Joe,
  Here is a program that does what you were trying...

 



[code]
DEVICE SX48,OSCHS1
FREQ 50_000_000
' Connect RB.6 to RC.3 to connect the output of Timer1 to the clock of Timer2
' Should generate an interrupt every 3 seconds. 

  

AFlag VAR Bit
 

  

WATCH AFlag,8,UDEC 


INTERRUPT
  GOSUB DoSomething
  TIMER2 CLEAR
  RETURNINT 


PROGRAM Start 

  

DoSomething:
BREAK
  AFlag = ~AFlag             ' Toggle AFlag value
RETURN 


Start:
  LVL_B=%00000000
  LVL_C=%00000000
  PLP_B=%01000000
  PLP_C=%00000111
  TRIS_B=%10111111           'RB.6 is an output
  TRIS_C=%11111000     

  RC=%00000000 

  AFlag=1                    ' Set flag initially to 1 

  

  ' Setup TIMER 2
  T2CNTA=%00000100           'Interrupt on compare
  TIMER2 EXTERNAL            'Timer 2 external exvent mode 
  TIMER2 R1, $08F0           'Interrupt when count is $08F0 or 2288
  TIMER2 CLEAR               'Clear timer 2 

  

  ' Setup TIMER 1
  TIMER1 PWM, $8000, $FFFF   'Timer1 PWM mode ON for $8000 counts, period = $FFFF counts 

  

Main:
  GOTO Main 

END 
[/code]

Bean.

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