MAX531 AVR驱动程序

#include<iom16v.h>
#include<macros.h>

#define uchar unsigned char
#define uint unsigned int

#define DING PORTA|=BIT(0)
#define DINL PORTA&=~BIT(0)
#define CLRG PORTA|=BIT(1)
#define CLRL PORTA&=~BIT(1)
#define SCLKG PORTA|=BIT(2)
#define SCLKL PORTA&=~BIT(2)
#define CSG PORTA|=BIT(3)
#define CSL PORTA&=~BIT(3)

uint vv;
void IOinit()
{
PORTA|=0X0F;
DDRA|=0X0F;
}

void delay(uint k)
{
while(k--);

}


void max531_IN(int a)//输入一个值
{
uchar i;
//CLRG;
//CSG;
//delay(80);
SCLKL;
CSL;

for(i=12;i>0;i--)
{
if(a&0x0800)
DING;
else
DINL;
SCLKG;
//delay(80);
SCLKL;
a<<=1;
}

CSG;
}



void main()
{
IOinit();
//while(1)
vv=0x0FF5;
max531_IN(vv);

delay(900);
}