max7219.h

philips LPC2103 ARM7 + TM1629C,利用SPI接口驱动TM1629C

#ifndef __MAX7219_H__
#define __MAX7219_H__



//移植时要修改的地方
/****************************************************************/
//级联的7219总个数
#define MAX7219NUM 8

//引脚连接 
sbit DIN = P1^0	;
sbit CLK = P1^2	;
sbit LOAD= P1^1	;
/***************************************************************/

typedef unsigned char uchar;
typedef unsigned int uint; 



//BCD decode for 0~9,blank
code uchar Seg[]={ 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0xff};	



//延时约1m秒,晶振是11.592
void delay_ms(uint n)
{
     uchar j;
     while(n--)
     for(j=0;j<120;j++);
}

//向7219发送一char型数据
void SendChar(uchar CharData)
{	 
    uchar ii;
    for (ii = 0;ii<8;ii++){//8个时钟		
 	CLK = 0;	 
	if(((CharData<<ii)&0x80)==0x80)
	  DIN = 1;
	else   
	  DIN = 0;
	CLK = 1;       
    }     
}

//向7219中发送多个串数据 
void SendAddrDataMulti(uchar Addr,uchar Data,uchar Num)
{ 
    LOAD = 0;
	do
	{
	   SendChar(Addr);
	   SendChar(Data);
	}while(--Num); 
 	LOAD = 1;   
}

//向7219发送一十六位的数据
void SendAddrDataSingle(uchar Addr,uchar Data)
{
	SendChar(Addr);
	SendChar(Data);    
}

 
//初始化所有的器件
void InitAllComponents(void)
{  
   SendAddrDataMulti(0xf9,0xff,MAX7219NUM); //set decode mode ,Code B Decode for digits 0~7  
   SendAddrDataMulti(0xfa,0x0f,MAX7219NUM); //set intensity to the max  
   SendAddrDataMulti(0xfb,0xf7,MAX7219NUM); //set scan limit register format for display 0~7 
   SendAddrDataMulti(0xfc,0x01,MAX7219NUM); //set the 7219 to Normal Operation .1--normal operation,0-hutdown 
   SendAddrDataMulti(0xff,0x00,MAX7219NUM); //set to display; 1-test mode,0-normal mode	 
}  


//向7219中写入数据,第一个编号是1,第二个是2.....
void WriteData2Comp(uchar Num)
{
     uchar i,j;

	 for (i=1;i<9;i++)//
     {	 
        LOAD = 0;
 	    SendAddrDataSingle(i, Seg[i+1]);
	    for(j=1;j<Num;j++)
		{
 	      SendAddrDataSingle(0x00,0x00);
		}
 	    LOAD = 1;	 
     }
   
}



#endif