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max7219点阵驱动程序分享

编程实验

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描述

MAX7219驱动点阵的原理图如下:

MAX7219

单片机+MAX7219点阵源程序如下:

#include 《reg52.h》

#include 《intrins.h》

#define uchar unsigned char

#define uint unsigned int

//定义Max7219端口

sbit Max7219_pinCLK = P2^2;

sbit Max7219_pinCS = P2^1;

sbit Max7219_pinDIN = P2^0;

uchar code disp1[38][8]={

{0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C},//0

{0x10,0x18,0x14,0x10,0x10,0x10,0x10,0x10},//1

{0x7E,0x2,0x2,0x7E,0x40,0x40,0x40,0x7E},//2

{0x3E,0x2,0x2,0x3E,0x2,0x2,0x3E,0x0},//3

{0x8,0x18,0x28,0x48,0xFE,0x8,0x8,0x8},//4

{0x3C,0x20,0x20,0x3C,0x4,0x4,0x3C,0x0},//5

{0x3C,0x20,0x20,0x3C,0x24,0x24,0x3C,0x0},//6

{0x3E,0x22,0x4,0x8,0x8,0x8,0x8,0x8},//7

{0x0,0x3E,0x22,0x22,0x3E,0x22,0x22,0x3E},//8

{0x3E,0x22,0x22,0x3E,0x2,0x2,0x2,0x3E},//9

{0x8,0x14,0x22,0x3E,0x22,0x22,0x22,0x22},//A

{0x3C,0x22,0x22,0x3E,0x22,0x22,0x3C,0x0},//B

{0x3C,0x40,0x40,0x40,0x40,0x40,0x3C,0x0},//C

{0x7C,0x42,0x42,0x42,0x42,0x42,0x7C,0x0},//D

{0x7C,0x40,0x40,0x7C,0x40,0x40,0x40,0x7C},//E

{0x7C,0x40,0x40,0x7C,0x40,0x40,0x40,0x40},//F

{0x3C,0x40,0x40,0x40,0x40,0x44,0x44,0x3C},//G

{0x44,0x44,0x44,0x7C,0x44,0x44,0x44,0x44},//H

{0x7C,0x10,0x10,0x10,0x10,0x10,0x10,0x7C},//I

{0x3C,0x8,0x8,0x8,0x8,0x8,0x48,0x30},//J

{0x0,0x24,0x28,0x30,0x20,0x30,0x28,0x24},//K

{0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x7C},//L

{0x81,0xC3,0xA5,0x99,0x81,0x81,0x81,0x81},//M

{0x0,0x42,0x62,0x52,0x4A,0x46,0x42,0x0},//N

{0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C},//O

{0x3C,0x22,0x22,0x22,0x3C,0x20,0x20,0x20},//P

{0x1C,0x22,0x22,0x22,0x22,0x26,0x22,0x1D},//Q

{0x3C,0x22,0x22,0x22,0x3C,0x24,0x22,0x21},//R

{0x0,0x1E,0x20,0x20,0x3E,0x2,0x2,0x3C},//S

{0x0,0x3E,0x8,0x8,0x8,0x8,0x8,0x8},//T

{0x42,0x42,0x42,0x42,0x42,0x42,0x22,0x1C},//U

{0x42,0x42,0x42,0x42,0x42,0x42,0x24,0x18},//V

{0x0,0x49,0x49,0x49,0x49,0x2A,0x1C,0x0},//W

{0x0,0x41,0x22,0x14,0x8,0x14,0x22,0x41},//X

{0x41,0x22,0x14,0x8,0x8,0x8,0x8,0x8},//Y

{0x0,0x7F,0x2,0x4,0x8,0x10,0x20,0x7F},//Z

{0x8,0x7F,0x49,0x49,0x7F,0x8,0x8,0x8},//中

{0xFE,0xBA,0x92,0xBA,0x92,0x9A,0xBA,0xFE},//国

};

void Delay_xms(uint x)

{

uint i,j;

for(i=0;i《x;i++)

for(j=0;j《112;j++);

}

//--------------------------------------------

//功能:向MAX7219(U3)写入字节

//入口参数:DATA

//出口参数:无

//说明:

void Write_Max7219_byte(uchar DATA)

{

uchar i;

Max7219_pinCS=0;

for(i=8;i》=1;i--)

{

Max7219_pinCLK=0;

Max7219_pinDIN=DATA&0x80;

DATA=DATA《《1;

Max7219_pinCLK=1;

}

}

//-------------------------------------------

//功能:向MAX7219写入数据

//入口参数:address、dat

//出口参数:无

//说明:

void Write_Max7219(uchar address,uchar dat)

{

Max7219_pinCS=0;

Write_Max7219_byte(address); //写入地址,即数码管编号

Write_Max7219_byte(dat); //写入数据,即数码管显示数字

Max7219_pinCS=1;

}

void Init_MAX7219(void)

{

Write_Max7219(0x09, 0x00); //译码方式:BCD码

Write_Max7219(0x0a, 0x03); //亮度

Write_Max7219(0x0b, 0x07); //扫描界限;8个数码管显示

Write_Max7219(0x0c, 0x01); //掉电模式:0,普通模式:1

Write_Max7219(0x0f, 0x00); //显示测试:1;测试结束,正常显示:0

}

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