2021年11月25日 | C51数码管显示相关问题总结

1.单个数码管的静态显示

/*--------------------------

功能：一个数码管的静态显示

Author: Zhang Kaizhou

Date: 2019-5-16 21:18:17

--------------------------*/

#include

sbit duan_address = P2^6; // 定义段地址为位寻址类型的变量

sbit wei_address = P2^7; // 定义位地址为位寻址类型的变量

void main()

{

wei_address = 1; // 打开位锁存器

P0 = 0xfe; // 输出数码管所在的位置

wei_address = 0; // 关闭位锁存器

duan_address = 1; // 打开段锁存器

P0 = 0x7d; // 输出共阴极数码管的段码(6)

duan_address = 0; // 关闭段锁存器

while(1);

}

2.数码管的动态循环显示

/*-----------------------------------

功能：在数码管上循环显示0~F 16个字符

Author: Zhang Kaizhou

Date: 2019-5-16 21:41:50

-----------------------------------*/

#include

#define uchar unsigned  char

#define uint unsigned int

sbit wei_address = P2^7; // 定义可位寻址类型的变量wei_address

sbit duan_address = P2^6; // 定义可位寻址的变量daun_address

uchar num; // 定义无符号字符变量num

uchar code table[] = {0x3f, 0x06, 0x5b, 0x4f,

  0x66, 0x6d, 0x7d, 0x07,

  0x7f, 0x6f, 0x77, 0x7c,

  0x39, 0x5e, 0x79, 0x71}; // 定义一个无符号字符型数组table[]用于存放共阴极数码管(0~F字符)段码，存放在单片机内部的ROM或Flash中

void delay(uint xms);

void main()

{

wei_address = 1; // 开位锁存器

P0 = 0x00; // 选择要显示的数码管

wei_address = 0; // 关锁存器

while(1)

{

for(num = 0; num < 16; num++) // 在数码管上循环显示0~F字符

{

duan_address = 1; // 开数码管的段锁存器

P0 = table[num]; // 输出段码

duan_address = 0; // 关段锁存器

delay(1000); // 延时1000ms = 1s

}

}

}

void delay(uint xms)

{

uint i, j;

for(i = xms; i > 0; i--)

for(j = 110; j > 0; j--);

}

3.多个数码管的动态扫描显示

/*-----------------------------------

功能：在4个数码管上动态显示字符信息

Author: Zhang Kaizhou

Date: 2019-5-16 21:41:50

-----------------------------------*/

#include

#define uchar unsigned  char

#define uint unsigned int

sbit wei_address = P2^7; // 定义可位寻址类型的变量wei_address

sbit duan_address = P2^6; // 定义可位寻址的变量daun_address

uchar num; // 定义无符号字符变量num

uchar code table[] = {0x3f, 0x06, 0x5b, 0x4f,

  0x66, 0x6d, 0x7d, 0x07,

  0x7f, 0x6f, 0x77, 0x7c,

  0x39, 0x5e, 0x79, 0x71}; // 定义一个无符号字符型数组table[]，存放在单片机内部的ROM或Flash中

void delay(uint xms);

void main()

{

while(1)

{

// 显示0

duan_address = 1;

P0 = table[0];

duan_address = 0;

wei_address = 1;

P0 = 0xfe;

wei_address = 0;

delay(5);

// 显示1

duan_address = 1;

P0 = table[1];

duan_address = 0;

P0 = 0xff; // 消影

wei_address = 1;

P0 = 0xfd;

wei_address = 0;

delay(5);

// 显示2

duan_address = 1;

P0 = table[2];

duan_address = 0;

P0 = 0xff; // 消影

wei_address = 1;

P0 = 0xfb;

wei_address = 0;

delay(5);

// 显示3

duan_address = 1;

P0 = table[3];

duan_address = 0;

P0 = 0xff; // 消影

wei_address = 1;

P0 = 0xf7;

wei_address = 0;

delay(5);

}

}

void delay(uint xms)

{

uint i, j;

for(i = xms; i > 0; i--)

for(j = 110; j > 0; j--);

}