Một số bài toán ứng dụng cho trình biên dịch keil c pptx

Một Số Bài Toán Ứng Dụng Cho Trình biên dịch Keil C

pptx

1: chương trình ma trận 4x4 ra led P1, nút ấn P2

//PROJECT : DEM LED 7 DOAN

//FILE : VD1.c

//DATE : 24/02/2014

//PROCESSOR : AT89C51

//AUTHOR : HPT

//******************************************

#include <REGX51.H>

#define LOOP 10

unsigned char LED_ARRAY[16] =

{0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71}; unsigned char KEY_MATRIX[4]={0xEF,0xDF,0xBF,0x7F}; //cho lan luot cac hang bang 0 roi kiem tra cot

//KHAI BAO CAC HAM

char SCAN_KEY(void);

void DISPLAY(unsigned char key);

void delay(unsigned int time);

//NOI DUNG CAC HAM

char SCAN_KEY(void)

{

unsigned char KEY_NUM; //bien tra ve gia tri ban phim tu 0-15

unsigned char x,y; //2 bien quet hang va cot

for(x=0;x<4;x++)

{

P2=KEY_MATRIX[x];

for(y=0;y<LOOP;y++) {

if(P2_0==0) KEY_NUM=0+4*x;

if(P2_1==0) KEY_NUM=1+4*x;

if(P2_2==0) KEY_NUM=2+4*x;

if(P2_3==0) KEY_NUM=3+4*x;

} }

return(KEY_NUM);

}

void DISPLAY(unsigned char key)

{

switch(key)

{

case 0: {P1 = ~LED_ARRAY[0];break;}

case 1: {P1 = ~LED_ARRAY[1];break;} case 2: {P1 = ~LED_ARRAY[2];break;} case 3: {P1 = ~LED_ARRAY[3];break;} case 4: {P1 = ~LED_ARRAY[4];break;} case 5: {P1 = ~LED_ARRAY[5];break;} case 6: {P1 = ~LED_ARRAY[6];break;} case 7: {P1 = ~LED_ARRAY[7];break;} case 8: {P1 = ~LED_ARRAY[8];break;} case 9: {P1 = ~LED_ARRAY[9];break;} case 10: {P1 = ~LED_ARRAY[10];break;} case 11: {P1 = ~LED_ARRAY[11];break;} case 12: {P1 = ~LED_ARRAY[12];break;} case 13: {P1 = ~LED_ARRAY[13];break;} case 14: {P1 = ~LED_ARRAY[14];break;} case 15: {P1 = ~LED_ARRAY[15];break;} }

}

//KHAI BAO HAM

void delay(unsigned int time)

{

unsigned int i;

for(i=0;i<time;i++)

{

;

}

}

/*KHAI BAO MANG QUET PHIM*/

//CT CHINH

void main(void)

{

unsigned char a;

while(1)

{

a=SCAN_KEY();

DISPLAY(a);

}

}

2: LED7 đoạn chạy từ 0-9, có 3 nút ấn P3_0 nút ấn lên, nút ấn P3_1 nút ấn xuống và nút ấn P3_2 là RESET:

#include <REGX51.H>

#define ON 0

#define OFF 1

sbit TANG=P3^0;

sbit GIAM=P3^1;

sbit RESET=P3^2;

unsigned char DEM=0;

unsigned char LED_ARRAY [10]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F}; //KHAI BAO

void delay(unsigned int time);

void display(void);

void read_key(void);

// viet tuong minh ca ham con

void delay(unsigned int time)

{

unsigned int i;

for (i=0;i<time;i++)

{;}

}

void display(void)

{

P2 = ~LED_ARRAY[DEM];

}

void read_key(void)

{

if(TANG==0)

{

delay(5000);

while(TANG==0);

delay(5000);

DEM++;

if(DEM==10) DEM=0;

}

;

{if (GIAM==0)

{

delay(5000);

while(GIAM==0);

delay(5000);

if(DEM==0) DEM=10;

DEM ;

}

;

if (RESET==0)

{

while(RESET==0);

delay(5000);

DEM=0;

}

}

}

}

// CHUONG TRINH CHINH

void main (void)

{

while(1)

{

read_key();

display();

}

}

3: LED7 đoạn có nút P3_0 đếm lên:

#include <REGX51.H>

#define ON 0

#define OFF 1

sbit BUTTON = P3^0;

unsigned char DEM=0;

unsigned char LED_ARRAY[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

void delay(unsigned int time) ; void display(void);

void read_key(void);

void delay(unsigned int time) {

unsigned int i;

for(i=0;i<time;i++) {;}

} void display(void)

{ P2 =

~LED_ARRAY[DEM];

}

void read_key(void) {

if(BUTTON==ON) {

delay(5000);

while(BUTTON==ON); //cho nha nut

delay(50000);

DEM++;

if(DEM==10) DEM=0; }

} //chuong trinh chinh void main(void) {

while(1) {

read_key();

display();

} }

4: 8LED sáng:

#include <REGX51.H>

void delay (unsigned int time)

{

unsigned int i;

for ( i=0; i<time; i++)

{

;

}

}

void main (void)

{

unsigned char LED=0x01;

while (1)

{

P2=~LED;

LED=LED<<1;

if(LED==0x00) LED=0x01;

delay (65000);

}

}