Single button, single click + double click + long press

Key function: single click, double click, long press

If a button is pressed for more than 1.5 seconds, it is considered a long press event.

If the time interval between two consecutive presses does not exceed 350ms, it is considered a double-click event.

Except for the above two items, all key presses belong to single-click events.

Without further ado, let's get straight to the code. If you have any questions, please feel free to discuss in the comments section.

/* This function runs once every 1ms so the time unit is 1ms */

#define KEY_LP_TIME 1500 /* Long press time (unit: ms) */

#define KEY_DOUBLE_TIME 350 /* If the interval between two presses does not exceed this value, it will be a double-click event*/

uint8_t KEY1_LP_FLG; /* Button long press flag */

uint8_t KEY1_PR_FLG; /* Button pressed flag */

uint8_t Key1LtDelay; /* Debounce time after key is lifted */

uint8_t Key1PrDelay; /* Debounce time after pressing the button */

uint8_t Key1PrCnt; /* Count the number of times a button is pressed to detect double clicks */

uint16_t Key1PrTimeCnt; /* Count the duration of pressing twice in a row to detect double click */

uint16_t Key1PrTime; /* Count the duration of button press to detect long press */

void Key1Scan(void){ //1ms scan once

if(KEY1 == 0){

Key1LtDelay = 0;

if(!KEY1_PR_FLG){

Key1PrDelay++;

if(Key1PrDelay>20){

Key1PrDelay = 0;

KEY1_PR_FLG = 1;

/********** User Code **********/

Key1PrCnt++; /*Count the number of times pressed*/

if(Key1PrCnt>2){ Key1PrCnt = 0; }  

KEY1_LP_FLG = 0;

Key1PrTime = 0;

/**************** End *************/

}

}

}

else{

Key1PrDelay = 0;

if(KEY1_PR_FLG){

Key1LtDelay++;

if(Key1LtDelay>20){

Key1LtDelay = 0;

KEY1_PR_FLG = 0;

/********** User Code **********/

KEY1_LP_FLG = 0; /* Lift the button and touch the long press mark */

/* When a button is pressed but exceeds the double-click detection time but does not reach the long-press time, it is considered a single-click event*/

if(Key1PrTime >= KEY_DOUBLE_TIME){

//Click event

}

/**************** End *************/

}

}

}

//Long press detection

if(KEY1_PR_FLG){

if(!KEY1_LP_FLG){

Key1PrTime++;

if(Key1PrTime >= KEY_LP_TIME){

Key1PrTime = 0; 

KEY1_LP_FLG = 1; /* Long press for 1.5S to set the long press flag*/

/********** User Code **********/

//Long press event

/************ End *************/

}

}

}

//Double click detection

if(Key1PrCnt==1){

if(Key1PrTimeCnt < KEY_DOUBLE_TIME){ Key1PrTimeCnt++; }

else{

if(!KEY1_PR_FLG){ 

//Click event

}

Key1PrTimeCnt = 0;

Key1PrCnt = 0;

}

}

else if(Key1PrCnt==2){

if(Key1PrTimeCnt < KEY_DOUBLE_TIME){

//Double click event

}

Key1PrCnt = 0;

Key1PrTimeCnt = 0;

}

}