shuma.c

单片机键盘扫描程序源代码,要下载的快

#include"address.h"
#define uchar  unsigned char 

void send(uchar buff);
void delay(unsigned int y);


void send(uchar buff)
{
 uchar i;
 uchar temp=buff;
 for(i=0;i!=8;i++)
 { 
 if(temp&0x01)SPIDATA=1;
 else	SPIDATA=0;
 SPICLK=0;SPICLK=1;
 temp>>=1;
 }
 SPILatch=0;
 SPILatch=1;
}

void delay(unsigned int y)
{
 uchar   x;
 for(;y!=0;y--)for(x=200;x!=0;x--);
}