Sao chạy có 1 hiêu ứng hà????????

[i0988305410]

//LED nhap nhap;
 //Creat 14h35  29/02/2012;
#include <REGX51.H>
//Tao ham thoi gian tre de duy tri thoi gian sang, tat cho led;
void delay(unsigned int ms) //ms co 1000 nen khia bao kieu int
{
	unsigned int i,j;
	for(i=0;i<ms;i++)
	for(j=0;j<121;j++)
	{
	}//Khong lam gi ca
}
void choptat()
{
	unsigned char i;
	while(1)
	{
		for(i=0;i<3;i++) //chay 3 lan
		{
		P1=0x00;//he hexa =00000000 nen led tat;
		delay(1000);
		P1=0xFF;// he hexa=11111111 nen tat ca led sang;
		delay(1000);
		}
	}
}
void sangdan()
	{
		unsigned char i;
		while(1)
		{
			for(i=0;i<3;i++) //chay 3 lan
			{
				P1=0x01;delay(1000);// 	led1 sang;
				P1=0x03;delay(1000);// led 1 2 sang;
				P1=0x07;delay(1000);// led 1 2 3 sang;
				P1=0x0F;delay(1000);// led 1..4 sang;
				P1=0x1F;delay(1000);// led 1.....5 sang;
				P1=0x3F;delay(1000);// led 1....6 sang;
				P1=0x7F;delay(1000);// led 1....7 sang;
				P1=0xFF;delay(1000);// led 1....8 sang;
				}
			}
	}
	 main()
	{
		while(1)
		{
		sangdan();
		choptat();
		}
	}

Mong mấy bác giải thích giùm! Em cảm ơn nhiều!

[OoMrBayoO]

//LED nhap nhap;
 //Creat 14h35  29/02/2012;
#include <REGX51.H>
//Tao ham thoi gian tre de duy tri thoi gian sang, tat cho led;
void delay(unsigned int ms) //ms co 1000 nen khia bao kieu int
{
	unsigned int i,j;
	for(i=0;i<ms;i++)
	for(j=0;j<121;j++)
	{
	}//Khong lam gi ca
}
void choptat()
{
	unsigned char i;
	while(1)
	{
		for(i=0;i<3;i++) //chay 3 lan
		{
		P1=0x00;//he hexa =00000000 nen led tat;
		delay(1000);
		P1=0xFF;// he hexa=11111111 nen tat ca led sang;
		delay(1000);
		}
	}
}
void sangdan()
	{
		unsigned char i;
		while(1)
		{
			for(i=0;i<3;i++) //chay 3 lan
			{
				P1=0x01;delay(1000);// 	led1 sang;
				P1=0x03;delay(1000);// led 1 2 sang;
				P1=0x07;delay(1000);// led 1 2 3 sang;
				P1=0x0F;delay(1000);// led 1..4 sang;
				P1=0x1F;delay(1000);// led 1.....5 sang;
				P1=0x3F;delay(1000);// led 1....6 sang;
				P1=0x7F;delay(1000);// led 1....7 sang;
				P1=0xFF;delay(1000);// led 1....8 sang;
				}
			}
	}
	 main()
	{
		while(1)
		{
		sangdan();
		choptat();
		}
	}

Mong mấy bác giải thích giùm! Em cảm ơn nhiều!

Cái chương trình con mà bạn dùng while(1) thì nó không thoát ra được đâu nên chỉ chạy cái hiệu ứng trước thôi.

[tdm]

//LED nhap nhap;
 //Creat 14h35  29/02/2012;
#include <REGX51.H>
//Tao ham thoi gian tre de duy tri thoi gian sang, tat cho led;
void delay(unsigned int ms) //ms co 1000 nen khia bao kieu int
{
    unsigned int i,j;
    for(i=0;i<ms;i++)
    for(j=0;j<121;j++)
    {
    }//Khong lam gi ca
}
void choptat()
{
    unsigned char i;
    while(1)
    {
        for(i=0;i<3;i++) //chay 3 lan
        {
        P1=0x00;//he hexa =00000000 nen led tat;
        delay(1000);
        P1=0xFF;// he hexa=11111111 nen tat ca led sang;
        delay(1000);
        }
    }
}
void sangdan()
    {
        unsigned char i;
        while(1)
        {
            for(i=0;i<3;i++) //chay 3 lan
            {
                P1=0x01;delay(1000);//     led1 sang;
                P1=0x03;delay(1000);// led 1 2 sang;
                P1=0x07;delay(1000);// led 1 2 3 sang;
                P1=0x0F;delay(1000);// led 1..4 sang;
                P1=0x1F;delay(1000);// led 1.....5 sang;
                P1=0x3F;delay(1000);// led 1....6 sang;
                P1=0x7F;delay(1000);// led 1....7 sang;
                P1=0xFF;delay(1000);// led 1....8 sang;
                }
            }
    }
     main()
    {
        while(1)
        {
        sangdan();
        choptat();
        }
    }

Mong mấy bác giải thích giùm! Em cảm ơn nhiều!

bỏ vòng lặp while(1) trong hàm sangdan();và choptat();