单片机源程序如下:
#include "ALL.H"
u8 NUM=0;
u8 key_N=0;
enum key_state
{
key_state_0,
key_state_1,
key_state_2,
key_state_3,
} ;
enum key_val
{
key_click=0x80,
key_double=0x40,
key_long=0x20,
key_value_1=0x0d, // 0000 1101
key_value_2=0x0e, // 0000 1110
key_value_3=0x0b, // 0000 1011
key_value_4=0x07, // 0000 0111
key_null=0x0f,
key_long_period=200,
key_continue_period=25,
};
void keyinit(void)
{
key_1=1;
key_2=1;
key_3=1;
key_4=1;
}
static u8 keyscan(void)
{
if(!key_1)return key_value_1;
if(!key_2)return key_value_2;
if(!key_3)return key_value_3;
if(!key_4)return key_value_4;
return key_null;
}
void Key_Driver(u8 *key_value)
{
static u8 key_state_buffer1=key_state_0;
static u8 key_timer_cnt1;
u8 key_buffer=key_null;
u8 key=keyscan();
switch(key_state_buffer1)
{
case key_state_0:
if(key_null!=key)
{
key_state_buffer1=key_state_1;
}
break;
case key_state_1:
if(key_null!=key)
{
key_timer_cnt1=0;
key_state_buffer1=key_state_2;
}
else
key_state_buffer1=key_state_0;
break;
case key_state_2:
if(key_null==key)
{
key_buffer=key;
key|=key_click;
key_state_buffer1=key_state_0;
}
else if(++key_timer_cnt1>=100)
{
key|=key_long;
key_state_buffer1=key_state_3;
}
break;
case key_state_3:
if(key_null==key)
key_state_buffer1=key_state_0;
break;
}
*key_value = key;
}
void Key_Read(u8 *key_value)
{
static u8 key_state_buffer2=key_state_0;
static u8 key_timer_cnt2=0;
u8 *ptemp;
u8 key_buffer=key_null; //0x0f
u8 key;
Key_Driver(ptemp);
ptemp=&key;
switch(key_state_buffer2)
{
case key_state_0:
if(key==(key|key_click))
{
key_timer_cnt2=0;
key_state_buffer2=key_state_1;
}
else
{
s6=~s6;
key_value = &key;
}
break;
case key_state_1:
if(key==(key|key_click))
{
key|=key_double;
s8=~s8;
key_state_buffer2=key_state_0;
}
else if(++key_timer_cnt2>=25)
{
key|=key_click;
s7=~s7;
key_state_buffer2=key_state_0;
}
break;
}
*key_value = key;
}
void Key_Allot()
{
u8 key=key_null;
u8 *ptemp;
if(flag)
{
flag=0; //10ms定时
Key_Read(ptemp);
ptemp=&key;
NUM=key;
if(key==0x8d) Min++; // 单击
if(key==0x8e) Min--;
if(key==0x8b) Sec=0;
if(key==0x87) Min=0;
if(key==0x2d) Hour++; // 长按
if(key==0x2e) Hour--;
if(key==0x2b) Hour=0;
if(key==0x27) Hour=24;
if(key==0x4d) Hour++; // 双击
if(key==0x4e) Hour--;
if(key==0x4b) Hour=0;
if(key==0x47) Hour=24;
}
}
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