k015priority.ino

Go to the documentation of this file.

#include <krnl.h>
// one task loops and blink
// k_wait ensures proper timing
// how does t2 runs ??? and why
 
struct k_t *p1, *p2,*s1;
 
 
// the high priority task
void t1()
{  
int v;
  k_set_sem_timer(s1,1100);
  while (1) {
   
    k_wait(s1,0); //wait until  a kick comes
    k_eat_ticks(1000);  // eat time for 1000 ticks so mimic cpu usage
  }  
}
 
void t2()
{  
    int i=0;
  while (1) { 
     Serial.println(i++);
   }  // do we keep up in pace ?  
}
 
 
void setup()
{
  int res;
  Serial.begin(9600);
  while (! Serial) ;
  pinMode(13,OUTPUT);
  
  k_init(2,1,0);  // init with space for one task
  //         |--- no of mg Queues (0)
  //       |----- no of semaphores (0)  
  //     |------- no of tasks (2)
 
  // priority low number higher priority than higher number
  p1 = k_crt_task(t1,9,100); // t1 as task, priority 10, 100 B stak
  p2 = k_crt_task(t2,10,100); // t1 as task, priority 10, 100 B stak
 
  s1 = k_crt_sem(0,10);
   Serial.println("bef start");
  res= k_start(1); // 1 milli sec tick speed
  // you will never return from k_start
  Serial.print("ups an error occured: "); Serial.println(res);
  while (1) ;
}
 
void loop() {}