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vote controller
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Diff: debounce_button.cpp
- Revision:
- 1:34e76c0cbe5a
- Parent:
- 0:fd29cd85e75e
- Child:
- 2:5b7d055dbc91
--- a/debounce_button.cpp Thu Oct 26 07:33:07 2017 +0000 +++ b/debounce_button.cpp Sun Oct 29 23:01:06 2017 +0000 @@ -1,6 +1,19 @@ #include "debounce_button.h" /** + TODO + ---- + - 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. + Find a method such that false calls of this function are going to be filtered out. + The main loop also needs to know when it can process the further instructions. + An acceptable time to disable further false positives is between 50ms and 100ms. + - The user needs to be able to click the button multiple times in 1 second. + The main loop needs to know how many times the user has pressed the button, such that + it can link different procedures to the different multiclicks. The main loop also needs + to know when this function is counting the clicks. Therefore, it has to wait until the clicks have been counted + before it can proceed. + - LED1 needs to be turned on while the function is counting the amount of clicks within 1 second. + Some tips and tricks: - To use the built-in LED: DigitalOut led1(LED1); @@ -9,49 +22,19 @@ - To delay the call of a function: Timeout someTimeout; ... - someTimeout.attach(callback(&someFunction), 0.5) with 0.5 as 500 milliseconds + someTimeout.attach(callback(&anotherFunction), 0.5) with 0.5 as 500 milliseconds - The variables that are used in interrupt callbacks have to be volatile, because these variables can change at any time. Therefore, the compiler is not going to make optimisations. + - Use boolean flags to send information between different processes. + - In the header file are extra functions and variables that can help you developing these procedures. + You can add, change or remove these functions and variables at any time, as long as it is clear what you've done. */ /** - TODO - ---- - This function: - - stores the amount of clicks in a variable which is read by the main loop. - - resets the click counter which is used inside this file. - - lowers a flag which tells the main loop that the user stopped pressing the button - such that it can proceed its program. - - turns the built-in LED off. Therefore, the user gets informed that the program stopped counting the clicks. -*/ -void button1_multiclick_reset_cb(void) { - -} - -/** - TODO - ---- - This function enables the button again, such that unwanted clicks of the bouncing button get ignored. + This function is called when the button has been pressed by the user. */ -void button1_enabled_cb(void) -{ - -} -/** - TODO - ---- - This function: - - turns the built-in LED on, so the user gets informed that the program has started with counting clicks - - disables the button such that the debouncer is active - - enables the button again after a certain amount of time - (use interrupts with "button1_enabled_cb()" as callback. - - counts the amount of clicks within a period of 1 second - - informs the main loop that the button has been pressed - - informs the main loop that the user is clicking the button. - Therefore, this main loop cannot continue its procedure until the clicks within 1 second have been counted. -*/ void button1_onpressed_cb(void) {