Max7221数码管动态显示

/**************************************************************************
  
                     THE MAX7221 LED DRIVER LIB
  
               COPYRIGHT (c)   2005 BY JJJ.
                         --  ALL RIGHTS RESERVED  --
  
   File Name:       Max7221.h
   Author:          Jiang Jian Jun
   Created:         2005/9/19
   Modified:  NO
   Revision:   1.0
  
***************************************************************************/
#ifndef _MAX7221_LED_DRIVER_2005_9_19_
#define _MAX7221_LED_DRIVER_2005_9_19_

#include

sbit Max7221CS  = P3^1;
sbit Max7221DIN = P3^0;
sbit Max7221CLK = P3^2;

void WriteMax7221(unsigned char Address,unsigned char Data)
{
 unsigned char i;
 Max7221CS = 0;
 for (i=0;i<8;i++)
 {
  Max7221CLK = 0;
  Max7221DIN = (Address&(0x80>>i)) ? 1:0;
  _nop_();
  _nop_();
  Max7221CLK = 1;
  _nop_();
  _nop_();
 }
 for (i=0;i<8;i++)
 {
  Max7221CLK = 0;
  Max7221DIN = (Data&(0x80>>i)) ? 1:0;
  _nop_();
  _nop_();
  Max7221CLK = 1;
  _nop_();
  _nop_();
 }
 Max7221CS = 1; 
}

void InitialMax7221(void)
{
 WriteMax7221(0x0A,0x07); //亮度地址0AH,0x00~0x0F,0x0F最亮
 WriteMax7221(0x0B,0x07); //扫描LED个数地址0BH,0x00~0x07,最多扫描8个数码管
 WriteMax7221(0x0C,0x01); //工作模式地址0x0C. 0x00:ShutDown;0x01:Normal
 WriteMax7221(0x09,0xFF); //编码模式地址0x09. 0x00~0xFF:哪一位为1，哪一位就支持编码
}

void Max7221Display(unsigned char *buffer)
{
 unsigned char i;
 for(i=0;i<8;i++)
 {
  WriteMax7221(i+1,*(buffer+i));
 }
}

#endif

#include
#include "Max7221.h"

unsigned char DisplayBuffer[8]={0,1,2,3,4,5,6,7};//显示缓冲区

main()
{
 InitialMax7221();
 Max7221Display(&DisplayBuffer[0]);
 while(1); 
}
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