max7219驱动8个数码管代码及电路图

#include "reg52.h"

#include "my_type.h"

#define Addr_No_Op 0x00 //不工作寄存器地址

#define Addr_Digit0 0x01

#define Addr_Digit1 0x02

#define Addr_Digit2 0x03

#define Addr_Digit3 0x04

#define Addr_Digit4 0x05

#define Addr_Digit5 0x06

#define Addr_Digit6 0x07

#define Addr_Digit7 0x08

#define Addr_Decode_Mode 0x09 //译码模式寄存器地址

#define Addr_Intensity 0x0a //亮度控制寄存器地址（max7221）

#define Addr_Scan_Limit 0x0b //扫描控制寄存器地址

#define Addr_Shutdowm 0x0c //掉电模式寄存器地址

#define Addr_Display_Test 0x0f //显示检测寄存器地址

sbit Max7219_Din=P1^5;

sbit Max7219_Load=P1^6;

sbit Max7219_Clk=P1^7;

uchar code max7219_7led_code[18]={0x7e,0x30,0x6d,0x79, //0-1-2-3

0x33,0x5b,0x5f,0x70, //4-5-6-7

0x7f,0x7b,0x01,0x4e, //8-9-"-"-E

0x37,0x0e,0x67,0x00}; //H-L-P-空白

void wr_max7219(uchar addr,uchar dat)

{

uchar i;

Max7219_Load=0;

Max7219_Clk=0;

for(i=0;i<8;i++)

{

Max7219_Din = (bit)(addr&0x80);

addr=addr<<1;

Max7219_Clk=1;

Max7219_Clk=0;

}

for(i=0;i<8;i++)

{

Max7219_Din=(bit)(dat&0x80);

dat=dat<<1;

Max7219_Clk=1;

Max7219_Clk=0;

}

Max7219_Load=1;

Max7219_Load=0;

}

main()

{

uchar j;

for(j=200;j>0;j--);

wr_max7219(Addr_Shutdowm,0x01);

wr_max7219(Addr_Scan_Limit,0x07);

wr_max7219(Addr_Intensity,0x0f);

wr_max7219(Addr_Decode_Mode,0x00);

wr_max7219(Addr_Digit0,max7219_7led_code[1]);

wr_max7219(Addr_Digit1,max7219_7led_code[2]);

wr_max7219(Addr_Digit2,max7219_7led_code[3]);

wr_max7219(Addr_Digit3,max7219_7led_code[4]);

wr_max7219(Addr_Digit4,max7219_7led_code[5]);

wr_max7219(Addr_Digit5,max7219_7led_code[6]);

wr_max7219(Addr_Digit6,max7219_7led_code[7]);

wr_max7219(Addr_Digit7,max7219_7led_code[8]);

P0=0x00;

// wr_max7219(Addr_Display_Test,0x01); //测试

while(1);

}