timeoutl.h

时间触发嵌入式系统设计模式:使用8051系列微控制器开发可靠应用

/*------------------------------------------------------------------*-

   TimeoutL.H (v1.00)

  ------------------------------------------------------------------

   Simple software (loop) timeout delays for the 8051 family.

   * THESE VALUES ARE NOT PRECISE - YOU MUST ADAPT TO YOUR SYSTEM *

   See Chapter 15 for details.


   COPYRIGHT
   ---------

   This code is from the book:

   PATTERNS FOR TIME-TRIGGERED EMBEDDED SYSTEMS by Michael J. Pont 
   [Pearson Education, 2001; ISBN: 0-201-33138-1].

   This code is copyright (c) 2001 by Michael J. Pont.
 
   See book for copyright details and other information.

-*------------------------------------------------------------------*/

// ------ Public constants -----------------------------------------
 
// Vary this value to change the loop duration
// THESE ARE APPROX VALUES FOR VARIOUS TIMEOUT DELAYS
// ON 8051, 12 MHz, 12 Osc / cycle

// *** MUST BE FINE TUNED FOR YOUR APPLICATION ***

// *** Timings vary with compiler optimisation settings ***

#define LOOP_TIMEOUT_INIT_001ms 65435
#define LOOP_TIMEOUT_INIT_010ms 64535
#define LOOP_TIMEOUT_INIT_500ms 14535

/*------------------------------------------------------------------*-
  ---- END OF FILE -------------------------------------------------
-*------------------------------------------------------------------*/