max6951.c

美信6951的c语言51驱动程序

#include "max6951.h"
void SegWrite(unsigned short  n)
{ 
  unsigned char i;
  MAX_CS=0;
  for(i=16;i;i--)
   {
    MAX_CLK=0;
    MAX_DATA=(n&0x8000);
    n<<=1;
	MAX_CLK=1;
   }
  MAX_DATA=1; 
  MAX_CS=1;     
}
InitMax6951()
{
						
	//SegWrite(0x0421);					//0x04,xxxxxx00,shutdown，xxxxxx01，normal
										//0x04,xxxxx00x,低速闪烁，xxxxx10x，快速闪烁
										//0x04,xxxx0x0x,禁止闪烁，xxxx1x0x，开启闪烁
										//0x04,xx0xxx0x,MAX_CS上升沿清零，xx1xxx0x，数据同步清零

	SegWrite(0x0429);
	SegWrite(0x0307);					//扫描限制，0x03000-0x0307
	SegWrite(0x020f);					//亮度调节，0x0200-0x020f					
	SegWrite(0x01ff);
}

void DisplayChr(unsigned char *temp,unsigned char plane)
{	
	unsigned long i;
	for(i=0;i<8;i++)
	{	
		switch(plane)
		{
			case 2:
				SegWrite(Plane2+temp[7-i]+(i<<8));
			break;
			case 1:
				SegWrite(Plane1+temp[7-i]+(i<<8));
			break;
			case 0:
				SegWrite(Plane0+temp[7-i]+(i<<8));
			break;
		}
	
	}
				   
}
void DisplayNum(unsigned long n,unsigned char NUM,unsigned char Dop,unsigned char plane)
{	
	unsigned long i;
	for(i=0;i<8;i++)
	{	
		switch(plane)
		{
			case 2:
				if(Dop==i)
				{
					SegWrite(Plane2+(n%NUM)+0x80+(i<<8));
				}
				else
				{
					SegWrite(Plane2+(n%NUM)+(i<<8));
				}
				n=n/NUM;
			break;			   
			case 1:
				if(Dop==i)
				{
					SegWrite(Plane1+(n%NUM)+0x80+(i<<8));
				}
				else
				{
					SegWrite(Plane1+(n%NUM)+(i<<8));
				}
				n=n/NUM;
			break;
			case 0:
				if(Dop==i)
				{
					SegWrite(Plane0+(n%NUM)+0x80+(i<<8));
				}
				else
				{
					SegWrite(Plane0+(n%NUM)+(i<<8));
				}
				n=n/NUM;
			break;	 
		}
	}
}