hello.c

uCOS的ARM7移植,在LPC2200芯片上的具体实现

#include "includes.h"

#define	TASK_STK_SIZE	1024		// Stack size, in bytes
#define	N_TASKS			2	// Number of tasks

OS_STK	TaskStk[N_TASKS][TASK_STK_SIZE/sizeof(OS_STK)];	// Tasks stacks

int  x = 0;

int y = 10;

// Prototypes

void	Task1(void * pParam);
void	Task2(void * pParam);
void	Sleep(INT16U uSec);

// Application entry point, invoked from Entry.obj

void start_kernel(void)
{
	int	LineNo10 = 10;
	int	LineNo11 = 11;


       OSInit();

	// Create two tasks.
      OSTaskCreate(Task1, &LineNo10, &TaskStk[0][TASK_STK_SIZE], 0);
      OSTaskCreate(Task2, &LineNo11, &TaskStk[1][TASK_STK_SIZE], 1);

	// Start multitasking.
      OSStart();
	/* NEVER EXECUTED */
}

// Display a line of characters at the line specified by the parameter,
// assuming a color 80x25 video adapter.
//
// This function never returns.

void Task1(void * pParam)
{
    at91_init_kernel();

    x=y=0;
    while (1)
	{
		x ++; 
		//Sleep(1);
	}

}

void Task2(void * pParam)
{
    while (1) 
	{	
		y --;
		//OSSched();
	}
}

// Sleeps for the specified delay (in seconds).
// Since the 8254 is not set in this implementation,
// sleeping one second means sleeping 18 clock ticks.

void Sleep(INT16U uSec)
{
	OSTimeDly((INT16U) (18 * uSec));
}