#include "head.c"
/*
//define KEY PIN
sbit KEY_CLK=P3^5;//74HC165D--CLOCK
sbit KEY_PL=P3^7;//74HC165D-->
sbit KEY_SDATA=P2^6;//74HC165D--OUT DATA
sbit KEY_573_OE=P0^0;//573 OUTPUT ENABLE
//UP,DOWN,OK,C+,C-,GND*3
//KEYS ALWAYS PULL LOW
//---------------------------
*/

extern lcm_res;
extern current_display;
extern void delay(unsigned int a);

unsigned char  key_read()
{
unsigned char temp,i;
KEY_PL=0;//data in HC165
delay(10);
KEY_PL=1;//PREPARE TO SHIEF data

LCM_RES_PORT=lcm_res;
LCM_573_LT=1;
LCM_573_LT=0;///------------
P2=0xff;
KEY_573_OE=0;///------------
temp=0;
KEY_CLK=0;
for(i=0;i<8;i++)
{
KEY_CLK=1;
//value=KEY_SDATA;
if(KEY_SDATA!=0)
temp=temp|(1<<i);

KEY_CLK=0;
}
KEY_573_OE=1;///------------
return temp;
}


void check_key()
{
unsigned char value;
value=key_read();
//printc(value);

if((value&KEYUP)!=0) press_up_key();
if((value&KEYDOWN)!=0) press_down_key();
if((value&KEYOK)!=0) press_auto_key();
if((value&KEYCADD)!=0) press_cadd_key();
if((value&KEYCSUB)!=0) press_csub_key();
//last_display

}

void press_up_key()
{
printc(1);
/*
if(current_display<MAX_STEP)
current_display++;
else
current_display=1;
*/
}
void press_down_key()
{
printc(2);
}
void press_auto_key()
{
printc(3);
}
void press_cadd_key()
{
printc(4);
}
void press_csub_key()
{
printc(5);
}