demo0.c

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/***************************************************************
 * demo1.c                                                     *
 *                                                             *
 * task_1和task_2基于时间片轮转调度，两个任务为同优先级的任务  *
 *                                                             *
 * designed by bobey
 ***************************************************************/


/* Include necessary files.  */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include"2410addr.h"
#include"2410lib.h"

/* Include necessary Nucleus PLUS files.  */
#include  "nucleus.h"
/* Application Structures */
NU_TASK         Task_1;
NU_TASK         Task_2;

NU_MEMORY_POOL  System_Memory;

extern  int ERC_System_Error(int);
/* Function Prototypes */
VOID    task_1(UNSIGNED argc, VOID *argv);
VOID    task_2(UNSIGNED argc, VOID *argv);

/* Define the Application_Initialize routine that determines the initial
   Nucleus PLUS application environment.  */
void    Application_Initialize(void *first_available_memory)
{

VOID           *pointer;
STATUS         status;
 
/*--------------------------uart initialize---------------------------------*/
     ChangeClockDivider(1,1);
     ChangeMPllValue(0xa1,0x3,0x1);   
     Port_Init();
     Uart_Select(0);
     Uart_Init(0,115200);
     Uart_Printf("Nucleus is running!\n");
     EnableTimer0();
/*----------------------------end-------------------------------------------*/

    /* Create a system memory pool that will be used to allocate task stacks,
       queue areas, etc.  */
    status = NU_Create_Memory_Pool(&System_Memory, "SYSMEM",
                        first_available_memory, 25000, 50, NU_FIFO);
    if (status != NU_SUCCESS)
    {
    
        ERC_System_Error(status);
    }
    else
    {
        Uart_Printf("System_Memory have been created!\n");
    }

    /* Create each task in the system.  */

    /* Create task1.*/
    NU_Allocate_Memory(&System_Memory, &pointer, 512, NU_NO_SUSPEND);
    status=NU_Create_Task(&Task_1, "TASK 1", task_1, 0, NULL, pointer,
                                      512, 3, 10, NU_PREEMPT, NU_START);
    if (status != NU_SUCCESS)
    {
    	
    	ERC_System_Error(status);
    }
    else
    {
        Uart_Printf("Task1 have been created\n");
    
    }
    /* Create task2.*/
    NU_Allocate_Memory(&System_Memory, &pointer, 512, NU_NO_SUSPEND);
    status=NU_Create_Task(&Task_2, "TASK 2", task_2, 0, NULL, pointer,
                                      512, 3, 10, NU_PREEMPT, NU_START);
    if (status != NU_SUCCESS)
    {
    	    	
    	ERC_System_Error(status);
    }
    else
    {
        Uart_Printf("task2 have been created\n");
        Uart_Printf("-----------------------\n");
    }
    
}
//--------------------------------------------------------------------//

/* Define the system timer task.  More complicated systems might use a
   routine like this to perform periodic message sending and other time
   oriented functions.  */
//--------------------------------------------------------------------//   

/**********************************************************************/
void task_1(UNSIGNED argc, VOID *argv)
{
	STATUS  status;
    int     i=0;
	status =  (STATUS) argc + (STATUS) argv;

	while(1)
	{
 	    i++;
        Uart_Printf("task1 is:%d\n",i);
		NU_Sleep(6);
		
	}
    
}	

/*********************************************************************/
	
void task_2(UNSIGNED argc, VOID *argv)
{
	STATUS  status;
	int     j=1;
    status =  (STATUS) argc + (STATUS) argv;

	while(1)
	{
        j++;
		Uart_Printf("task2 is:%d\n",j);
        NU_Sleep(6);
	}
}