Single chip microcomputer three key modes single click double click long press

/**************************************************************************

Function: key scan

Entry parameters: Double-click waiting time

Return value: button status 0: no action 1: single click 2: double click

key=0 means pressing

**************************************************************************/

u8 click_N_Double (u8 time)

{

static u8 flag_key,count_key,double_key;

static u16 count_single,Forever_count;

if(KEY2==0) Forever_count++; //Long press flag is not set to 1

else Forever_count=0;

if(0==KEY2&&0==flag_key) flag_key=1;

if(0==count_key)

{

if(flag_key==1)//Click once to enter once

{

double_key++;

count_key=1;

}

if(double_key==2) //Judge double click

{

double_key=0;

count_single=0;

return 2; //Double click to execute command

}

}

if(1==KEY2) flag_key=0,count_key=0;

if(1==double_key)

{

count_single++;

if(count_single>time&&Forever_count

{

//The interval is too long to be considered a single click

double_key=0;

count_single=0;

return 1; //Click to execute the command

}

if(Forever_count>time)

{

//Long press

double_key=0;

count_single=0;

}

}

return 0;

}

/**************************************************************************

Function: key scan (the operation here is mainly for single click)

Entry parameters: None

Return value: button status 0: no action 1: click

**************************************************************************/

u8 click(void)

{

static u8 flag_key=1;//button press and release flag

if(flag_key&&KEY==0)

{

flag_key=0;

return 1; // Button pressed

}

else if(1==KEY) flag_key=1;

return 0; //No button pressed

}

/**************************************************************************

Function: long press detection

Entry parameters: None

Return value: button status 0: no action 1: long press 2s

**************************************************************************/

u8 Long_Press(void)

{

static u16 Long_Press_count,Long_Press;

if(Long_Press==0&&KEY==0) Long_Press_count++; //Long press flag is not set to 1

else Long_Press_count=0;

if(Long_Press_count>200)

{

Long_Press=1; //This is to control the long press time

Long_Press_count=0;

return 1;

}

if(Long_Press==1) //Long press mark position 1

{

Long_Press=0;

}

return 0;

}