A small system used on a single chip microcomputer for the Scheduler state machine

Task by TIME Chip LUN practice

eg:

while (1)

{

if (task_delay[0]==0)

Task1 ();

if (task_delay[1]==0)

Task2 ();

}

void Time0 (void) interrupt1

{

for (i=0;i<task_max;i++)

{

if (Task_delay[i])

task_delay[i]--;

}

This structure is suitable for each task time below 10ms

If the length of time as 18B20 initialization can be divided into multiple fragments ( state machine )

eg:

Case 0: ...

Flag=1;

Case 1:

flag=2;

The system is implemented by the priority level

while (1)

{

for (i=0;i<max_task;i++)

{

if (task_delay[i]==0) {run (task[i]);

}

}

Note the break !!! in the program He's the one who can prioritize programs .

void (* code task[]) () = {task0,task1,task2,task3};// get task pc pointer

void run (void (*ptask))// pointer function pointing to function

{

(*ptask) ();

}

When used:run (task[i]);

#include <iostream> #include <unistd.h> #include <signal.h> #include <time.h> #include <sys/ Time.h>using namespace std;void hello1 () {    cout << "Hello1" <<endl;} Void hello2 () {    cout << "Hello22" &LT;&LT;ENDL;} Void hello3 () {    cout << "hello333" &LT;&LT;ENDL;} int task_delay[3] = {10,50,100};void  (* task[]) ()  = {hello1,hello2,hello3}; Void run (void  (*ptask) ()) {     (*ptask) ();} Void timer (Int signo) {    for  (int i = 0; i <  3; ++i)     {        if  (task_delay [i])         {             task_delay[i] --;        }&nBsp;   }    signal (Sigalrm, timer);    return;} Int main (int argc, char *argv[]) {    signal (SIGALRM, timer);     struct itimerval value;    value.it_value.tv_sec =  0;    value.it_value.tv_usec = 10000;    value.it_ interval.tv_sec = 0;    value.it_interval.tv_usec = 10000;     setitimer (Itimer_real, &value, &value);    while  (True)     {        if  (! task_delay[0])          {             run (task[0]);            task_delay[0]  = 10;        }        else if  (! task_ DELAY[1])         {             run (task[1]);             task_delay[1] = 50;        }         else if  (! task_delay[2])         {             run (task[2]);             task_delay[2] = 100;         }    }    return 0;}

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A small system used on a single chip microcomputer for the Scheduler state machine