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PIC24F Timer modules with callback support

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Author: Anton Rieckert

Last Updated: 2012-04-13

Package Version: 1.0.0.0

Category: Timers (Real time clock)

Downloaded: 822 times

Followed by: 1 user

License: MIT license  

This library makes it easier to work with the build in timer modules of the PIC24F range. There are 2 units you can include in your source code. The initialisation function takes 2 parameters, the interval in milliseconds and the callback function that should be executed.

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Library Blog

PIC24F Timer library with callback support

Example

program TimerExample;

// Include the timer module libraries that you want to use
uses 
  libTimer1,
  libTimer2;

//==============================================================================
procedure Timer1Callback;
begin
  // This procedure will be called every 1000 ms
  LatB := PortB xor 0xFF00;
end;

//==============================================================================
procedure Timer2Callback;
begin
  // This procedure will be called every 500 ms
  LatB := PortB xor 0x00FF;
end;

//==============================================================================
begin
  // Init the CPU and pint
  TrisB := 0x0000;
  LatB  := 0x0000;

  // Make all pins digital
  AD1PCFG := 0xFFFF;

  // Timerx_Init(msInterval : word; aCallback : ^TTimerCallback)
  // The Timerx_Init procedure takes 2 parameters
  // msInterval - Interval in ms the timer should execute a procedure
  // aCallback - Pointer to the procedure that should execute
  
  // Timer 1 will execute Timer1Callback every 100ms
  Timer1_Init(100, @Timer1Callback);

  // Timer 2 will execute Timer2Callback every 250ms
  Timer2_Init(250, @Timer2Callback);
  
  // Start the timers
  Timer1_Enable;
  Timer2_Enable;
  
  // Wait in an endless loop. The callback procedures will be called on the
  // timer interrupts
  while true do;
end.

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