eg4.c

武汉创维特的arm培训例程试验程序

/*
 * File:        eg4.c
 *
 * uC/OS Real-time multitasking kernel for the ARM processor.
 *
 * This program is an example of multi task control.
 *
 * Created by cooljet (www.cvtech.com.cn)
 *
 */
#include	"Includes.h"               /* uC/OS interface */
#include    "44blib\option.h"
#include    "44blib\44blib.h"

/* defines */
#define		NUM_TASKS	3	/* must be number in range 1 to 62 */

/* task stack */
OS_STK		 TaskStk[NUM_TASKS+1][STACKSIZE];
int		     pZERO = 0;		/* need a pointer to value of 0 */

/* mailbox event control blocks */
OS_EVENT	*DispSem;

/* task name string */

char		BLACK[]	  = {ESC,'[','3','0','m',0};
char		RED[]     = {ESC,'[','3','1','m',0};
char		GREEN[]	  = {ESC,'[','3','2','m',0};
char		BROWN[]	  = {ESC,'[','3','3','m',0};
char		BLUE[]    = {ESC,'[','3','4','m',0};
char		MAGENTA[] = {ESC,'[','3','5','m',0};
char		CYAN[]    = {ESC,'[','3','6','m',0};
char		WHITE[]   = {ESC,'[','3','7','m',0};

/* functions */
void	Task(void *id);
void	IdleTask( void *id);

/*
 * LED blink function. 
 *     this function blink the led
 */
void User_LED_Blink(void)
{
	static int led_status = 0;
	
	led_status += 1;
	if(led_status % 2 == 0)
		*(char *)0x02000000 = 0xff;
	else
		*(char *)0x02000000 = 0x00;			
}

/*
 * LED blink function. 
 *     this function blink the led
 */
void User_SEG_Blink(void)
{
	static unsigned char seg_value[] = { 0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90, 0x88, 0x83, 0xc6, 0xa1, 0x86, 0x8e };		   
	static int seg_status = 0;
	
	*((unsigned char *)0x8000000) = seg_value[seg_status];
	seg_status += 1;
	if(seg_status > 15)
		seg_status = 0;
}

/*
 * Main function.
 */
void Main(void)
{
 	static int			id[NUM_TASKS];
 	int			j;

	for(j=0; j<NUM_TASKS; j++)	/* generate the ID's */
	{
		id[j] = (int)'1' + j;	/* create an id we can see */
	}
	    
	/* 
     * do target (uHAL based ARM system) initialisation 
     */
	ARMTargetInit();

    uHALr_printf("#########Example 4#########\n");
    
    /* 
     * needed by uC/OS 
     */
	OSInit();

	DispSem = OSSemCreate( 1 );	/* Display semaphore */

	for(j=0; j<NUM_TASKS; j++)	/* generate the tasks */
	{
		OSTaskCreate(Task, (void *)&id[j], (OS_STK *)&TaskStk[j][STACKSIZE-1], j+1);
	}

	OSTaskCreate(IdleTask,(void *)&pZERO,(OS_STK *)&TaskStk[j][STACKSIZE-1], j+1);

    /* Start the (uHAL based ARM system) system running */
    ARMTargetStart();
    
    /* 
     * start the task 
     */
    OSStart();

    /* 
     * never reached 
     */
	return;
}   

/*
 * T a s k
 *
 * This is being used by NUM_TASKS tasks.
 */
void	Task(void *id)
{
 	INT8U	err;
 	int	    j;

	while(1)
	{
		OSTimeDly(10);		/* Delay a while */
		OSSemPend(DispSem, 0, &err);
		switch(*(char *)id)
		{
			case '1' :
				User_SEG_Blink();			/* print task's id */
				uHALr_printf("%c", *(char *)id);
				break;
			case '2' :
				User_LED_Blink();			/* print task's id */
				uHALr_printf("%c", *(char *)id);
				break;
			case '3' :
				User_SEG_Blink();			/* print task's id */
				uHALr_printf("%c", *(char *)id);
				break;
			default:
				User_LED_Blink();			/* print task's id */
				uHALr_printf("%c", *(char *)id);
		}
		OSSemPost(DispSem);
	}
}

/*
 * I d l e T a s k
 *
 * idle task
 */
void	IdleTask(void *id)
{
 	INT8U	err;

	while(1)
	{
		OSSemPend(DispSem, 0, &err);
		uHALr_printf(".");
		OSSemPost(DispSem);
		OSTimeDly(1);
	}
}