Jianing Chen

[email protected]

==== Simple Cooperative Multitasking ====

• This is a light-weighted solution for multi-tasking using one thread.

• The stack for each process still reside in the main stack, but with some offset.

• See "cmt/debug.c" for some examples.

• Build "cmt/debug.c" to test. For example: >>gcc debug.c

• Initialize with:

  cmt_initialize(NULL);// NULL => use default setting
  

• Process function example:

  void ProcessFunctionA(void*data){
      // no large local variables. (limited by stack size)
      // int data[32]; - OK
      // int buffer[1000]; - Avoid
      // int *buffer = (int*)malloc(sizeof(int)*1000); - OK
      
      //... any other code ...
      
      // delay like this:
      cmt_wait(500);
      
      // polled wait like this:
      while(some_condition()){
          cmt_cooperate();
      }
      
  }
  

• Lauch a process:

  
  cmt_launch_process(ProcessFunctionA,NULL);
  
  

• Main loop example:

  while(1){
      
      //... any other code ...
      
      cmt_main_routine();
      cmt_process_timers(time_between_iteration);
      
      //... any other code ...
      
      time_delay(time_between_iteration);// any delay method (if needed)
  }