GPIO debounce is not working for STM32

[Scriptman]

Library/API/IoT binding

System.Device.Gpio

Visual Studio version

VS2022 (v17.1.1)

.NET nanoFramework extension version

No response

Target name(s)

ST_NUCLEO64_F411RE_NF

Firmware version

CLR Version: 1.8.0.98

Device capabilities

Target capabilities: Has nanoBooter: YES nanoBooter: v21845.21845.21845.21845 IFU capable: NO Has proprietary bootloader: NO

AppDomains:

Assemblies: Testing_Debounce, 1.0.0.0 nanoFramework.Runtime.Events, 1.10.0.3 mscorlib, 1.12.0.4 Iot.Device.Button, 1.1.0.0 System.Device.Gpio, 1.0.4.3 nanoFramework.Hardware.Stm32, 1.8.3.3

Native Assemblies: mscorlib v100.5.0.17, checksum 0x004CF1CE nanoFramework.Runtime.Native v100.0.9.0, checksum 0x109F6F22 nanoFramework.Hardware.Stm32 v100.0.4.4, checksum 0x0874B6FE nanoFramework.ResourceManager v100.0.0.1, checksum 0xDCD7DF4D nanoFramework.System.Collections v100.0.1.0, checksum 0x2DC2B090 nanoFramework.System.Text v100.0.0.1, checksum 0x8E6EB73D nanoFramework.Runtime.Events v100.0.8.0, checksum 0x0EAB00C9 EventSink v1.0.0.0, checksum 0xF32F4C3E System.Math v100.0.5.4, checksum 0x46092CB1 System.Device.Adc v100.0.0.0, checksum 0xE5B80F0B System.Device.Gpio v100.1.0.4, checksum 0xB6D0ACC1 System.Device.I2c v100.0.0.1, checksum 0xFA806D33 System.Device.Pwm v100.1.0.4, checksum 0xABF532C3 System.IO.Ports v100.1.6.0, checksum 0xB798CE30 System.Device.Spi v100.1.2.0, checksum 0xB6C4B3BD

Description

When setting The DebounceTimeout for a Gpio Pin, the event callback is never called.

When disabling the DebounceTimeout, the event callback is working.

How to reproduce

Use the sample code provided below.

Expected behaviour

The event being called while DebounceTimeout set.

Screenshots

No response

Sample project or code

using System;
using System.Device.Gpio;
using System.Diagnostics;
using System.Threading;

namespace Testing_Debounce
{
    public class Program
    {
        public static void Main()
        {
            Debug.WriteLine("Starting program");

            GpioController gpioController = new();
            GpioPin gpioPin = gpioController.OpenPin(PinNumber('C', 11), PinMode.InputPullUp);

            gpioPin.DebounceTimeout = new TimeSpan(0, 0, 0, 100);
            gpioController.RegisterCallbackForPinValueChangedEvent(PinNumber('C', 11), PinEventTypes.Falling, PinStateChanged);

            Thread.Sleep(Timeout.Infinite);
        }

        public static void PinStateChanged(object sender, PinValueChangedEventArgs pinValueChangedEventArgs)
        {
            Debug.WriteLine("Pin state changed");
        }

        public static int PinNumber(char port, byte pin)
        {
            if (port < 'A' || port > 'J')
                throw new ArgumentException();

            return ((port - 'A') * 16) + pin;
        }
    }
}

Aditional information

No response

[networkfusion]

Just wondering if the solution is in this commit... https://github.com/nanoframework/nanoFramework.IoT.Device/commit/150c4d2ec3581f49b955eec0936452b83e76a1cd

Of note, that commit seems to have fixed the button that required a software debounce, but broken the buttons that have hardware debounce...

[josesimoes]

Just wondering if the solution is in this commit... nanoframework/nanoFramework.IoT.Device@150c4d2

Nope. Debounce of GPIO pins it's carried in native code...

[Scriptman]

Some time has passed, and I tried also tried setting the event via the GpioPin.ValueChanged, to no avail :(

gpioPin.ValueChanged += gpioPin_ValueChanged