#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
//定义Max7219端口
sbit Max7219_pinCLK = P0^2;
sbit Max7219_pinCS = P0^1;
sbit Max7219_pinDIN = P0^0;
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;
}
//-------------------------------------------
//功能：向第二片MAX7219写入数据
//入口参数：address、dat
//出口参数：无
//说明：
void Write_Max7219_2(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_pinCLK=1;
Write_Max7219_byte(0X00); //对第一片执行空操作
Write_Max7219_byte(0X00);
Max7219_pinCS=1;
}
//MAX7219初始化
void Init_MAX7219(void)
{
Write_Max7219(0x09, 0xff); //译码方式：BCD码
Write_Max7219_2(0x09, 0xff); //译码方式：BCD码
Write_Max7219(0x0a, 0x02); //亮度
Write_Max7219_2(0x0a, 0x02); //亮度
Write_Max7219(0x0b, 0x07); //扫描界限；8个数码管显示
Write_Max7219_2(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_2(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
Write_Max7219_2(0x0f, 0x00); //显示测试：1；测试结束，正常显示：0
}
void main(void)
{
Delay_xms(50);
Init_MAX7219();
Write_Max7219(1,1);
Write_Max7219(2,2);
Write_Max7219(3,3);
Write_Max7219(4,4);
Write_Max7219(5,5);
Write_Max7219(6,6);
Write_Max7219(7,7);
Write_Max7219(8,8);
Write_Max7219_2(1,8);
Write_Max7219_2(2,7);
Write_Max7219_2(3,6);
Write_Max7219_2(4,5);
Write_Max7219_2(5,4);
Write_Max7219_2(6,3);
Write_Max7219_2(7,2);
Write_Max7219_2(8,1);
}
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