main.c

some reference exercise of C language

// Khai bao cac file header
#include	<AT89X52.H>
#include	<Kit8051.h>

// Khai bao cac bien toan cuc
unsigned char code LED_code[] =  {Number0,
				  Number1,
				  Number2,
				  Number3,
				  Number4,
				  Number5,
				  Number6,
				  Number7,
				  Number8,
				  Number9};

// Khai bao cac ham
void Delay(unsigned int n);
void InitSystem(void);
void Display(unsigned char digit1,
	     unsigned char digit2,
	     unsigned char digit3,
	     unsigned char digit4);


// Dinh nghia cac ham
void Delay(unsigned int n)
{
	unsigned int i,j;
	for(i=0;i<n;i++)
		for(j=0;j<100;j++);
}
void Display(unsigned char digit1,
	     unsigned char digit2,
	     unsigned char digit3,
	     unsigned char digit4)
{
	// Hien thi so thu nhat
	LED = LED_code[digit1];
	K1 = 0;
	Delay(1);
	K1 = 1;

	// Hien thi so thu hai
	LED = LED_code[digit2];
	K2 = 0;
	Delay(1);
	K2 = 1;

	// Hien thi so thu ba
	LED = LED_code[digit3];
	K3 = 0;
	Delay(1);
	K3 = 1;


	// Hien thi so thu tu
	LED = LED_code[digit4];
	K4 = 0;
	Delay(1);
	K4 = 1;
}
void InitSystem(void)
{
	LCD_E = 0;
}
// Chuong trinh chinh
void main(void)
{
	// Khoi tao he thong
	InitSystem();
	// Vong lap vo tan
	while(1)
	{
		Delay(10);
		Display(1,2,3,4);
	}
}