keyboard.c

驱动ADUC845进行AD采样

#include "keyboard.h"

void delaynop()
{
uint16 i=10;
for (;i-->0;)
{

}
}
void get_keycode(uint8 *keycode,uint8 keylen)
{
uint8 i,j,keytemp=0;
		CS=1;
		SL=0;
     	SL=1;
		CLK=1;
		CS=0;
	for (i=0;i<keylen;i++)
		{
		keytemp=0;
			for(j=0;j<8;j++)
				{
					CLK=1;
					CLK=0;
					keytemp<<=1;
					keytemp=keytemp|OUT;
				}
		keycode[i]=keytemp;
		}
		CS=1;
		SL=0;
}

void get_keynum(uint8 *key_buffer,uint8 keylen,uint8 buffer_length)
{
uint8 i=0,j=0;
		CS=1;
		SL=0;
     	SL=1;
		CLK=1;
		CS=0;
		while (i<keylen*8&&j<buffer_length)
		{
					CLK=1;
					CLK=0;
			   if (!OUT) key_buffer[j++]=i;
		       i++;
		}
		CS=1;
		SL=0;
}

void get_keyrows(uint8 **key_buffer,uint8 keylen,uint8 buffer_rows)
{
uint8 i=0,j=0,pbf=0;
		CS=1;
		SL=0;
     	SL=1;
		CLK=1;
		CS=0;
	for ( i=0; i<keylen; i++)
    {
		for ( j=0, pbf=0; j<8, pbf<buffer_rows; j++)
		{
					CLK=1;
					CLK=0;
			   if (!OUT) key_buffer[i][pbf++]=j;
		}
	}
		CS=1;
		SL=0;
}

uint8 get_keycount(uint8 keylen)
{
uint8 i,cnt=0;
		CS=1;
		SL=0;
     	SL=1;
		CLK=1;
		CS=0;
	for (i=0;i<keylen*8;i++)
		{
					CLK=1;
					CLK=0;
					if (!OUT) cnt++;
					
		}
		CS=1;
		SL=0;
return cnt;
}
/*
void main()
{
uint8 *keys;
keys=(uint8*)malloc(2*sizeof(uint8));
get_keycode(keys,2);
P2=keys[0];
}*/