main.c

s3c4510的一个任务例子源代码

#include	"../../ucos-ii/includes.h"               /* uC/OS interface */

#include "../uhal/s3c4510b.h"

//task stack size
#ifdef SEMIHOSTED
	#define	TASK_STACK_SIZE	(64+SEMIHOSTED_STACK_NEEDS)
#else
	#define		TASK_STACK_SIZE	10*1024
#endif

//Task definition

/* allocate memory for tasks' stacks */
#define STACKSIZE 128

//#define DATABUFFSIZE	32
#define HALFOFSIZE		16

/* Global Variable */
unsigned int Stack1[STACKSIZE];
unsigned int Stack2[STACKSIZE];
unsigned int Stack3[STACKSIZE];
unsigned int StackMain[STACKSIZE];

unsigned int StackUART0Tx[STACKSIZE];

OS_EVENT *hMyMbox = 0;

//
	int ByteCnt = 0;
	char DataBuff[DATABUFFSIZE];
	char *pRx = &DataBuff[0];
	char exFlag = 0;



void Uart0Tx(void *Id)
{
	char *pTx = 0;
//	int TxByteCnt = 0;
	int i=0;
	INT8U pError = 0;
	
	while(1)
	{
		//debug
/*		while(!(UARTSTAT0&0x40));
		UARTTXH0 = 0x55;				
		OSTimeDly(200);
*/		
		//Get Msg
		pTx = (char*)OSMboxPend(hMyMbox,0,&pError);
		
		if(pTx != 0)
		{//Tx Data
			for(i=0;i<HALFOFSIZE;i++)
			{
				while(!(UARTSTAT0&0x40));
				
				UARTTXH0 = *(pTx+i);				
			}
		
		}
	
	}
}



void Task1(void *Id)
{
	while(1)
	{
		IOPDATA = (IOPDATA)^0x0001;
		OSTimeDly(50);
	}
}

void Task2(void *Id)
{
	int i;
	
	while(1)
	{
       	for(i=0; i<16; i++)
	  {
		IOPDATA = (IOPDATA)^0x0002;
		OSTimeDly(50);
	  }
	}
}

void Task3(void *Id)
{
	int i=0;
	while(1)
	{
		for (i = 16; --i >= 0; )
		{
	    	Set8Led(i);		//display number 'i' on the 7 segments LED 
	 		OSTimeDly(100);
	    }

    	if( i == 0)
    		i = 16;
    		
	}
}

void TaskStart (void *i)
{

     char Id1 = '1';
     char Id2 = '2';
     char Id3 = '3';
     
     uHALr_InitTimers();            // enable timer counter interrupt
                
     /*
     * create the tasks in uC/OS and assign decreasing
     * priority to them
     */
    OSTaskCreate(Uart0Tx, (void *)0, &StackUART0Tx[STACKSIZE - 1], 2);


    OSTaskCreate(Task1, (void *)0, &Stack1[STACKSIZE - 1], 4);
    OSTaskCreate(Task2, (void *)0, &Stack2[STACKSIZE - 1], 5);
    OSTaskCreate(Task3, (void *)0, &Stack3[STACKSIZE - 1], 6);
    
    // Delete current task
    OSTaskDel(OS_PRIO_SELF);
}

int Main(void)//int argc, char **argv
{
	char Id4 = '4';
	ARMTargetInit();
	
	/* needed by uC/OS */
	OSInit();
	
	OSTimeSet(0);

	hMyMbox = OSMboxCreate((void *)0);
	if(hMyMbox == (void*)0)
		return;
	
	/* create the start task */
	OSTaskCreate(TaskStart,(void *)0, &StackMain[STACKSIZE - 1], 0);
	
	ARMTargetStart();
	
	/* start the operating system */
	OSStart();
	
	return(0);
	
//* End
}                              


void UART0RxIsr(void)
{
	*(pRx+ByteCnt) = UARTRXB0;
	ByteCnt++;
	if(ByteCnt>=HALFOFSIZE)
	{
		ByteCnt = 0;
		if(exFlag == 0)
		{
			exFlag = 1;
			OSMboxPost(hMyMbox, pRx);
			pRx = &DataBuff[HALFOFSIZE];
		}
		else
		{
			exFlag = 0;
			OSMboxPost(hMyMbox, pRx);
			pRx = &DataBuff[0];
		}
	}

}