jamie wubben / Mbed OS PGO6_VoteController_template

jamie

Dependencies:   MQTT

Fork of PGO6_VoteController_template by Jens de hoog

debounce_button.cpp@3:c77bed3482d3, 2018-10-11 (annotated)

Committer:
jamie_wubben
Date:
Thu Oct 11 15:51:58 2018 +0000
Revision:
3:c77bed3482d3
Parent:
2:5b7d055dbc91 
Jamie

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jensdehoog 0:fd29cd85e75e 1 #include "debounce_button.h"
jensdehoog 0:fd29cd85e75e 2
jamie_wubben 3:c77bed3482d3 3 DigitalIn button(USER_BUTTON);
jamie_wubben 3:c77bed3482d3 4 DigitalOut led1(LED1);
jamie_wubben 3:c77bed3482d3 5 DigitalOut led2(LED2);
jamie_wubben 3:c77bed3482d3 6 volatile bool button1_enabled = true;
jamie_wubben 3:c77bed3482d3 7 volatile bool button1_buzy = false;
jamie_wubben 3:c77bed3482d3 8 Timeout someTimeout;
jamie_wubben 3:c77bed3482d3 9 Timeout timer;
jamie_wubben 3:c77bed3482d3 10 int counter = 0;
jensdehoog 0:fd29cd85e75e 11 /**
jensdehoog 0:fd29cd85e75e 12 Some tips and tricks:
jensdehoog 0:fd29cd85e75e 13 - To use the built-in LED:
jensdehoog 0:fd29cd85e75e 14 DigitalOut led1(LED1);
jensdehoog 0:fd29cd85e75e 15 ...
jensdehoog 0:fd29cd85e75e 16 led1 = 1;
jensdehoog 0:fd29cd85e75e 17 - To delay the call of a function:
jensdehoog 0:fd29cd85e75e 18 Timeout someTimeout;
jensdehoog 0:fd29cd85e75e 19 ...
jensdehoog 2:5b7d055dbc91 20 someTimeout.attach(callback(&someFunction), 0.5) with 0.5 as 500 milliseconds
jensdehoog 0:fd29cd85e75e 21 - The variables that are used in interrupt callbacks have to be volatile,
jensdehoog 0:fd29cd85e75e 22 because these variables can change at any time. Therefore, the compiler is not
jensdehoog 0:fd29cd85e75e 23 going to make optimisations.
jensdehoog 0:fd29cd85e75e 24 */
jensdehoog 0:fd29cd85e75e 25
jensdehoog 0:fd29cd85e75e 26 /**
jensdehoog 2:5b7d055dbc91 27 TODO
jensdehoog 2:5b7d055dbc91 28 ----
jensdehoog 2:5b7d055dbc91 29 This function:
jensdehoog 2:5b7d055dbc91 30 - stores the amount of clicks in a variable which is read by the main loop.
jensdehoog 2:5b7d055dbc91 31 - resets the click counter which is used inside this file.
jensdehoog 2:5b7d055dbc91 32 - lowers a flag which tells the main loop that the user stopped pressing the button
jensdehoog 2:5b7d055dbc91 33 such that it can proceed its program.
jensdehoog 2:5b7d055dbc91 34 - turns the built-in LED off. Therefore, the user gets informed that the program stopped counting the clicks.
jensdehoog 2:5b7d055dbc91 35 */
jamie_wubben 3:c77bed3482d3 36
jamie_wubben 3:c77bed3482d3 37 void replay(){
jamie_wubben 3:c77bed3482d3 38 //replay the multiclick
jamie_wubben 3:c77bed3482d3 39 for(int i=0;i<counter;i++){
jamie_wubben 3:c77bed3482d3 40 led2 = 1;
jamie_wubben 3:c77bed3482d3 41 wait(0.2);
jamie_wubben 3:c77bed3482d3 42 led2 =0;
jamie_wubben 3:c77bed3482d3 43 wait(0.2);
jamie_wubben 3:c77bed3482d3 44 }
jensdehoog 2:5b7d055dbc91 45 }
jensdehoog 2:5b7d055dbc91 46
jamie_wubben 3:c77bed3482d3 47 // This function enables the button again, such that unwanted clicks of the bouncing button get ignored.
jensdehoog 2:5b7d055dbc91 48 void button1_enabled_cb(void)
jensdehoog 2:5b7d055dbc91 49 {
jamie_wubben 3:c77bed3482d3 50 button1_enabled = true;
jamie_wubben 3:c77bed3482d3 51 led1 = 0;
jamie_wubben 3:c77bed3482d3 52 replay();
jensdehoog 2:5b7d055dbc91 53 }
jensdehoog 0:fd29cd85e75e 54
jensdehoog 2:5b7d055dbc91 55 /**
jensdehoog 2:5b7d055dbc91 56 TODO
jensdehoog 2:5b7d055dbc91 57 ----
jensdehoog 2:5b7d055dbc91 58 This function:
jensdehoog 2:5b7d055dbc91 59 - turns the built-in LED on, so the user gets informed that the program has started with counting clicks
jensdehoog 2:5b7d055dbc91 60 - disables the button such that the debouncer is active
jensdehoog 2:5b7d055dbc91 61 - enables the button again after a certain amount of time
jensdehoog 2:5b7d055dbc91 62 (use interrupts with "button1_enabled_cb()" as callback.
jensdehoog 2:5b7d055dbc91 63 - counts the amount of clicks within a period of 1 second
jensdehoog 2:5b7d055dbc91 64 - informs the main loop that the button has been pressed
jensdehoog 2:5b7d055dbc91 65 - informs the main loop that the user is clicking the button.
jensdehoog 2:5b7d055dbc91 66 Therefore, this main loop cannot continue its procedure until the clicks within 1 second have been counted.
jensdehoog 2:5b7d055dbc91 67 */
jamie_wubben 3:c77bed3482d3 68
jamie_wubben 3:c77bed3482d3 69 void button1_busy_enable(){
jamie_wubben 3:c77bed3482d3 70 button1_buzy = false;
jamie_wubben 3:c77bed3482d3 71 }
jensdehoog 0:fd29cd85e75e 72 void button1_onpressed_cb(void)
jensdehoog 0:fd29cd85e75e 73 {
jamie_wubben 3:c77bed3482d3 74 //button is pressed first time, turn led on
jamie_wubben 3:c77bed3482d3 75 if(button1_enabled){
jamie_wubben 3:c77bed3482d3 76 counter = 0;
jamie_wubben 3:c77bed3482d3 77 // turns the built-in LED on, so the user gets informed that the program has started with counting clicks
jamie_wubben 3:c77bed3482d3 78 led1 = 1;
jamie_wubben 3:c77bed3482d3 79 //disables the button such that the debouncer is active
jamie_wubben 3:c77bed3482d3 80 button1_enabled = false;
jamie_wubben 3:c77bed3482d3 81 button1_buzy = true;
jamie_wubben 3:c77bed3482d3 82 timer.attach(callback(&button1_busy_enable),0.1);
jamie_wubben 3:c77bed3482d3 83 // enables the button again after a certain amount of time (use interrupts with "button1_enabled_cb()" as callback.
jamie_wubben 3:c77bed3482d3 84 someTimeout.attach(callback(&button1_enabled_cb), 5);
jamie_wubben 3:c77bed3482d3 85 }else if(!button1_buzy){
jamie_wubben 3:c77bed3482d3 86 counter++;
jamie_wubben 3:c77bed3482d3 87 button1_buzy = true;
jamie_wubben 3:c77bed3482d3 88 timer.attach(callback(&button1_busy_enable),0.1);
jamie_wubben 3:c77bed3482d3 89 }
jensdehoog 0:fd29cd85e75e 90
jensdehoog 0:fd29cd85e75e 91 }