main.cpp

00001 // CooCox RTOS v1.1.4 with simple example
00002 // Two LEDs will blink with 250ms and 500ms interval based on two seperate tasks
00003 // by electronix79, 29/July/2011
00004 //
00005 // Comments: Nice work by Eric Ebert which used CooCox RTOS v1.1.3 but all files of CoOS were in one main folder,
00006 // so I create new project with the same structure as in CooCox design and of cause I use the updated version 1.1.4 
00007 
00008 #include "mbed.h"
00009 
00010 #include <CoOS.h>
00011 
00012 DigitalOut led1(LED1), led4(LED4);
00013 
00014 #define TASK_STACK_SIZE         128         /*!< Define task size */
00015 
00016 #define PRIORITY_TASK1          1           /* Priority of task 1 */
00017 #define PRIORITY_TASK2          2           /* Priority of task 2 */
00018 #define PRIORITY_TASK3          3           /* Priority of task 3 */
00019 
00020 OS_STK    task1_stk[TASK_STACK_SIZE];       /*!< Define "task1" task stack */
00021 OS_STK    task2_stk[TASK_STACK_SIZE];       /*!< Define "task2" task stack */
00022 OS_STK    task3_stk[TASK_STACK_SIZE];       /*!< Define "task3" task stack */
00023 
00024 OS_TID    task1_id;                         /*!< Task ID of 'task1'. */
00025 OS_TID    task2_id;                         /*!< Task ID of 'task2'. */
00026 OS_TID    task3_id;                         /*!< Task ID of 'task3'. */
00027 
00028 OS_MutexID  mut_1;                          /*!< Save id of mutex.  */
00029 
00030 void task1(void *);
00031 void task2(void *);
00032 void task3(void *);
00033 
00034 void task1(void* pdata)
00035 {   
00036     mut_1 = CoCreateMutex();                /* Create a mutex */
00037 
00038     task2_id = CoCreateTask(task2, (void *)0, PRIORITY_TASK2, &task2_stk[TASK_STACK_SIZE-1], TASK_STACK_SIZE);
00039     task3_id = CoCreateTask(task3, (void *)0, PRIORITY_TASK3, &task3_stk[TASK_STACK_SIZE-1], TASK_STACK_SIZE);
00040     
00041     CoExitTask();                           /* Delete 'task1' task. */
00042 }
00043 
00044 void task2(void* pdata)
00045 {
00046     for(;;)
00047     {
00048         CoEnterMutexSection(mut_1);         /* Enter critical region */
00049         led1 = 1;                           /* Turn On Led */
00050         CoLeaveMutexSection(mut_1);         /* Exit critical region */
00051         CoTickDelay(250);                   /* Delay 250ms */
00052         CoEnterMutexSection(mut_1);         /* Enter critical region */
00053         led1 = 0;                           /* Turn Off Led */
00054         CoLeaveMutexSection(mut_1);         /* Exit critical region */
00055         CoTickDelay(250);                   /* Delay 250ms */
00056     }
00057 }
00058 
00059 void task3(void* pdata)
00060 {
00061     for(;;)
00062     {
00063         CoEnterMutexSection(mut_1);         /* Enter critical region */
00064         led4 = 1;                           /* Turn On Led */
00065         CoLeaveMutexSection(mut_1);         /* Exit critical region */
00066         CoTickDelay(500);                   /* Delay 500ms */
00067         CoEnterMutexSection(mut_1);         /* Enter critical region */
00068         led4 = 0;                           /* Turn Off Led */
00069         CoLeaveMutexSection(mut_1);         /* Exit critical region */
00070         CoTickDelay(500);                   /* Delay 500ms */
00071     }
00072 }
00073 
00074 int main()
00075 {
00076     CoInitOS();                             /*!< Initial CooCox CoOS */
00077 
00078     task1_id = CoCreateTask(task1, (void *)0, PRIORITY_TASK1, &task1_stk[TASK_STACK_SIZE-1], TASK_STACK_SIZE);
00079 
00080     CoStartOS();                            /*!< Start multitask */
00081 
00082     while (1);                              /*!< The code don't reach here */
00083 }