Jonas De Rynck / Mbed OS PGO6_VoteController_JonasDeRynck

vote controller implementatie van Jonas De Rynck

Dependencies:   MQTT

Fork of PGO6_VoteController_template by Jens de hoog

debounce_button.cpp@2:5f2104244c27, 2017-10-30 (annotated)

Committer:
jonasdr
Date:
Mon Oct 30 16:43:58 2017 +0000
Revision:
2:5f2104244c27
Parent:
1:34e76c0cbe5a 
Jonas De Rynck - embedded vote controller

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jensdehoog 0:fd29cd85e75e 1 #include "debounce_button.h"
jensdehoog 0:fd29cd85e75e 2
jensdehoog 0:fd29cd85e75e 3 /**
jensdehoog 1:34e76c0cbe5a 4 TODO
jensdehoog 1:34e76c0cbe5a 5 ----
jensdehoog 1:34e76c0cbe5a 6 - A debouncer has to be present: the built-in buttons of the Nucleo aren't that good, so false positives have to be filtered out.
jensdehoog 1:34e76c0cbe5a 7 Find a method such that false calls of this function are going to be filtered out.
jensdehoog 1:34e76c0cbe5a 8 The main loop also needs to know when it can process the further instructions.
jensdehoog 1:34e76c0cbe5a 9 An acceptable time to disable further false positives is between 50ms and 100ms.
jensdehoog 1:34e76c0cbe5a 10 - The user needs to be able to click the button multiple times in 1 second.
jensdehoog 1:34e76c0cbe5a 11 The main loop needs to know how many times the user has pressed the button, such that
jensdehoog 1:34e76c0cbe5a 12 it can link different procedures to the different multiclicks. The main loop also needs
jensdehoog 1:34e76c0cbe5a 13 to know when this function is counting the clicks. Therefore, it has to wait until the clicks have been counted
jensdehoog 1:34e76c0cbe5a 14 before it can proceed.
jensdehoog 1:34e76c0cbe5a 15 - LED1 needs to be turned on while the function is counting the amount of clicks within 1 second.
jensdehoog 1:34e76c0cbe5a 16
jensdehoog 0:fd29cd85e75e 17 Some tips and tricks:
jensdehoog 0:fd29cd85e75e 18 - To use the built-in LED:
jensdehoog 0:fd29cd85e75e 19 DigitalOut led1(LED1);
jensdehoog 0:fd29cd85e75e 20 ...
jensdehoog 0:fd29cd85e75e 21 led1 = 1;
jensdehoog 0:fd29cd85e75e 22 - To delay the call of a function:
jensdehoog 0:fd29cd85e75e 23 Timeout someTimeout;
jensdehoog 0:fd29cd85e75e 24 ...
jensdehoog 1:34e76c0cbe5a 25 someTimeout.attach(callback(&anotherFunction), 0.5) with 0.5 as 500 milliseconds
jensdehoog 0:fd29cd85e75e 26 - The variables that are used in interrupt callbacks have to be volatile,
jensdehoog 0:fd29cd85e75e 27 because these variables can change at any time. Therefore, the compiler is not
jensdehoog 0:fd29cd85e75e 28 going to make optimisations.
jensdehoog 1:34e76c0cbe5a 29 - Use boolean flags to send information between different processes.
jensdehoog 1:34e76c0cbe5a 30 - In the header file are extra functions and variables that can help you developing these procedures.
jensdehoog 1:34e76c0cbe5a 31 You can add, change or remove these functions and variables at any time, as long as it is clear what you've done.
jensdehoog 0:fd29cd85e75e 32 */
jensdehoog 0:fd29cd85e75e 33
jensdehoog 0:fd29cd85e75e 34 /**
jensdehoog 1:34e76c0cbe5a 35 This function is called when the button has been pressed by the user.
jensdehoog 0:fd29cd85e75e 36 */
jonasdr 2:5f2104244c27 37 Timeout timeout;
jonasdr 2:5f2104244c27 38 Timeout timeout2;
jonasdr 2:5f2104244c27 39 DigitalOut busy_led(LED2);
jonasdr 2:5f2104244c27 40 DigitalOut testled(LED1);
jonasdr 2:5f2104244c27 41 volatile bool button1_enabled = true;
jonasdr 2:5f2104244c27 42 volatile int multiclick_state = 0;
jonasdr 2:5f2104244c27 43 volatile bool button1_busy = false; // Informs the mainloop that the user is clicking the button
jonasdr 2:5f2104244c27 44 volatile int multiclick_state_mem = 0;
jonasdr 2:5f2104244c27 45 volatile bool isready = false;
jensdehoog 0:fd29cd85e75e 46
jensdehoog 0:fd29cd85e75e 47 void button1_onpressed_cb(void)
jensdehoog 0:fd29cd85e75e 48 {
jonasdr 2:5f2104244c27 49 if (button1_enabled)
jonasdr 2:5f2104244c27 50 {
jonasdr 2:5f2104244c27 51 if(multiclick_state == 0) //eerste druk binnen een seconde
jonasdr 2:5f2104244c27 52 {
jonasdr 2:5f2104244c27 53 button1_busy = true; //knop is busy voor 1 sec
jonasdr 2:5f2104244c27 54 busy_led = 1;
jonasdr 2:5f2104244c27 55 timeout2.attach(callback(button1_multiclick_reset_cb), 1.0);
jonasdr 2:5f2104244c27 56 }
jonasdr 2:5f2104244c27 57 multiclick_state += 1;
jonasdr 2:5f2104244c27 58 button1_enabled = false;
jonasdr 2:5f2104244c27 59 timeout.attach(callback(&button1_enabled_cb), 0.075);
jonasdr 2:5f2104244c27 60 }
jonasdr 2:5f2104244c27 61 }
jonasdr 2:5f2104244c27 62
jonasdr 2:5f2104244c27 63 void button1_multiclick_reset_cb(void)
jonasdr 2:5f2104244c27 64 {
jonasdr 2:5f2104244c27 65 isready = true;
jonasdr 2:5f2104244c27 66 multiclick_state_mem = multiclick_state; // aantal kliks onthouden
jonasdr 2:5f2104244c27 67 multiclick_state = 0;
jonasdr 2:5f2104244c27 68 button1_busy = false; //button niet meer busy
jonasdr 2:5f2104244c27 69 busy_led = 0;
jonasdr 2:5f2104244c27 70 for(int i = 0; i<multiclick_state_mem; i++)
jonasdr 2:5f2104244c27 71 {
jonasdr 2:5f2104244c27 72 testing();
jonasdr 2:5f2104244c27 73 }
jensdehoog 0:fd29cd85e75e 74
jonasdr 2:5f2104244c27 75 }
jonasdr 2:5f2104244c27 76
jonasdr 2:5f2104244c27 77
jonasdr 2:5f2104244c27 78 void button1_enabled_cb(void)
jonasdr 2:5f2104244c27 79 {
jonasdr 2:5f2104244c27 80 button1_enabled = true;
jonasdr 2:5f2104244c27 81 }
jonasdr 2:5f2104244c27 82
jonasdr 2:5f2104244c27 83 void testing(void)
jonasdr 2:5f2104244c27 84 {
jonasdr 2:5f2104244c27 85 testled = 1;
jonasdr 2:5f2104244c27 86 wait(0.2);
jonasdr 2:5f2104244c27 87 testled = 0;
jonasdr 2:5f2104244c27 88 wait(0.2);
jensdehoog 0:fd29cd85e75e 89 }