34. STM32CubeIDE Button debounce. Interrupt with STM32F103C8T6

[@tszulpinedo757]

La gente de India es bien inteligente... Gracias por compartir el conocimiento. Muchas gracias.

[@NizarMohideen]

Thanks

[@theblitz1687]

As far as i understood, for a falling edge detector button, this method only prevents debounce during falling edge. But debouncing still can happen while on rising edge. Edit: Figured the rising edge problem by making the button fall/rise and writing the code accordingly

[@mckryall]

Great video, thank you! Good idea using the tweezers' cap as a nonconductive rod to poke things with.

[@muzaffersemihturan9944]

very good explanation thank u

[@NizarMohideen]

Glad you liked it

[@ДмитрийТисов-ж6я]

Спасибо

[@shambhusingh5094]

Very good 👍

[@NizarMohideen]

Thank you 👍

[@paraskhosla9622]

but you set the led pin to output like this "GPIOA->ODR |= GPIO_ODR_6;" or you created some function for led to toggle?

[@Red_Fang.]

i want to make long pressed push button, how can i improve debouncing button to make long pressed one ? thank you

[@KaiMusic00]

Hi there I am using sensor as an input which will turn on the buzzer, and also using EXTERNAL interupt Buthon the to turn off the buzzer and turn on the LED but the code is not working. It is like when I siply power it only do one tast only butten not buzzer and also sensor stop working need help with example

[@charnelmane2461]

thank you for this good tutorial can you please do the same thing with an STM32L432KC and three LED?

[@NizarMohideen]

Hi Charnel, I don’t have STM32L432 but it is simple. You can set three interrupts and three GPIO_Output. Good luck

[@charnelmane2461]

@@NizarMohideen I've already tried this a few times but it doesn't work properly

[@NizarMohideen]

Is it working with only one button Click NVIC → EXTI line1 interrupt → Enabled (Tick) You need to tick correct line interrupt for the pin you are using

[@charnelmane2461]

@@NizarMohideen ok Thank you verry much i will try it

[@AMBOKMUHAMMADFIRDAUSBINIMRAN]

can the ground be connected at the same place

[@NizarMohideen]

Yes. You can

[@KaiMusic00]

Can you creat vedio on LIFO and FIFO using GPS DATA

[@ruanpotgieter2596]

How does the code look in the main loop? One only calls the function with the pin name as argument?

[@NizarMohideen]

We don't check the button condition in the main loop. Instead, the button interrupts and HAL_GPIO_EXTI_Callback is called whenever pressed. For a simple button example, please see video no 14 in my channel

[@NizarMohideen]

kzbin.info/www/bejne/j4fFi4VpYqqiga8

[@njan1242]

I want to make keyboard using push button that use arrow keys, space key, enter key, back space key, shift key

[@shambhusingh5094]

Please explain below condition - What is 10? if (GPIO_Pin == GPIO_PIN_1 && (currentMillis - previousMillis > 10))

[@NizarMohideen]

Push button debounces multiple times due to its mechanical nature. For single push, it can send several interrupts. In this video, I have avoided any interrupts within 10 milliseconds from the original interrupt. Depending on the sensitivity of your push button, you can adjust this timing. Thank you

[@shambhusingh5094]

@@NizarMohideen Thank you 😊

[@talhadeveci9298]

@@NizarMohideen is this 10 milisecond delay or timer interrupt ? I mean is the code waiting at 10 milisecond line ?

[@NizarMohideen]

10 milisecond is not timer 10 milisecond is not delay 10 milisecond is a counter using HAL_GetTick() We use this counter to check whether the interrupt happened within 10 milisecond from the last interrupt. If it is within 10 milisecond, the interrupt is from the same push of the button, Otherwise it is a another push of the button HAL_GetTick() is similar to millis function in arduino

[@mz9zn]

Works very bad and unstable. Sometimes it's ok, sometimes the LED returns to the previous state after button release.

[@NizarMohideen]

I have used 10 milli seconds to ignore debounce interrupts If the push button is not smooth, you may need to increase the time if (GPIO_Pin == GPIO_PIN_1 && (currentMillis - previousMillis > 10)) ^^^

[@mz9zn]

@@NizarMohideen I've already tried to set 50ms, but it doesn't help. Also, it's not a button problem. The same button works flawlessly with 50ms debouncing delay in my PIC code. But I'm new to STM32 and can't make it work yet.

[@NizarMohideen]

I will search for better way of doing with interrupt service routine. If anything better, I will let you know. In the mean time, you can also search for isr documents in the net. Thanks

[@olegdemkiv561]

Іomeone has the problem this example? I thing, this method work only on the first moment, when you press the button, but if you release the button this method can detect second press.

[@atpTUBE]

You should check falling or rising edge of trigger of clock