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Issue init GPIO on TinkerBoard

See original GitHub issue

[…] I will do more tests asap […] _Originally posted by @zixzix in https://github.com/mattjlewis/diozero/issues/69#issuecomment-819760978_

After many tests I noticed some strange behaviors that I report here in detail

Test Environment

TinkerBoard 1
Armbian Focal 21.02.3
Diozero 1.2.1
Java 16
Tomcat 10
OUT Pin for test: 184, 163, 162
IN Pin for test: 257, 166, 168

Java code for init DigitalInputDevice

DigitalInputDevice pin = new DigitalInputDevice(pinNumber, GpioPullUpDown.PULL_UP, GpioEventTrigger.BOTH);
pin.addListener(event -> {...});

Java code for init DigitalOutputDevice

DigitalOutputDevice pin = new DigitalOutputDevice(pinNumber, true, false);

Java code for close Pin

pin.close();

Java code for shutdown

DeviceFactoryHelper.shutdown();

Scenario 1 (diozero.gpio.chardev=false) First init of new DigitalInputDevice works fine. First init of new DigitalOutputDevice works fine.

After close all initialized pins and call shutdown method

Second init of new DigitalInputDevice fails with following error:

epoll_ctl: error in add, Bad file descriptor
com.diozero.api.RuntimeIOException: Error registering file '/sys/class/gpio/gpio257/value' with epoll
        at com.diozero.util.EpollNative.register(EpollNative.java:168)
        at com.diozero.internal.provider.builtin.SysFsDigitalInputDevice.enableListener(SysFsDigitalInputDevice.java:122)
        at com.diozero.internal.spi.AbstractInputDevice.setListener(AbstractInputDevice.java:58)
        at com.diozero.api.DigitalInputDevice.setListener(DigitalInputDevice.java:252)
        at com.diozero.api.AbstractDigitalInputDevice.enableDeviceListener(AbstractDigitalInputDevice.java:71)
        at com.diozero.api.GpioInputDevice.addListener(GpioInputDevice.java:64)

Second init of new DigitalOutputDevice fails with following error:

java.lang.NullPointerException: Cannot load from object array because "this.gpioBanks" is null
        at com.diozero.internal.board.tinkerboard.TinkerBoardMmapGpio.gpioWrite(TinkerBoardMmapGpio.java:312)
        at com.diozero.internal.provider.builtin.SysFsDigitalOutputDevice.setValue(SysFsDigitalOutputDevice.java:102)
        at com.diozero.internal.provider.builtin.SysFsDigitalOutputDevice.<init>(SysFsDigitalOutputDevice.java:76)
        at com.diozero.internal.provider.builtin.DefaultDeviceFactory.createDigitalOutputDevice(DefaultDeviceFactory.java:262)
        at com.diozero.internal.spi.GpioDeviceFactoryInterface.provisionDigitalOutputDevice(GpioDeviceFactoryInterface.java:84)
        at com.diozero.api.DigitalOutputDevice.<init>(DigitalOutputDevice.java:158)
        at com.diozero.api.DigitalOutputDevice.<init>(DigitalOutputDevice.java:142)

Scenario 2 (diozero.gpio.chardev=false) First init of new DigitalInputDevice works fine. First init of new DigitalOutputDevice works fine.

After close all initialized pins and without call shutdown method

Second init of new DigitalOutputDevice works fine Second init of new DigitalInputDevice give me the following warn but works:

No listener for fd 93, event value: ‘1’
No listener for fd 95, event value: ‘1’
…

Scenario 3 (diozero.gpio.chardev=true) First init of new DigitalOutputDevice works fine. First init of new DigitalInputDevice fails with following error:

java.lang.IndexOutOfBoundsException
        at java.base/java.nio.Buffer.checkIndex(Unknown Source)
        at java.base/java.nio.DirectIntBufferU.get(Unknown Source)
        at com.diozero.util.MmapIntBuffer.get(MmapIntBuffer.java:56)
        at com.diozero.internal.board.tinkerboard.TinkerBoardMmapGpio.setPullUpDown(TinkerBoardMmapGpio.java:281)
        at com.diozero.internal.provider.builtin.NativeGpioInputDevice.<init>(NativeGpioInputDevice.java:69)
        at com.diozero.internal.provider.builtin.DefaultDeviceFactory.createDigitalInputDevice(DefaultDeviceFactory.java:240)
        at com.diozero.internal.spi.GpioDeviceFactoryInterface.provisionDigitalInputDevice(GpioDeviceFactoryInterface.java:61)
        at com.diozero.api.DigitalInputDevice.<init>(DigitalInputDevice.java:195)
        at com.diozero.api.DigitalInputDevice.<init>(DigitalInputDevice.java:175)

After close all initialized pins and call shutdown method

Second init of new DigitalInputDevice fails with following error:

java.lang.IllegalArgumentException: Can't find chip for id 5
        at com.diozero.internal.provider.builtin.DefaultDeviceFactory.createDigitalInputDevice(DefaultDeviceFactory.java:237)
        at com.diozero.internal.spi.GpioDeviceFactoryInterface.provisionDigitalInputDevice(GpioDeviceFactoryInterface.java:61)
        at com.diozero.api.DigitalInputDevice.<init>(DigitalInputDevice.java:195)
        at com.diozero.api.DigitalInputDevice.<init>(DigitalInputDevice.java:175)

Second init of new DigitalOutputDevice fails with following error:

java.lang.IllegalArgumentException: Can't find chip for id 6
        at com.diozero.internal.provider.builtin.DefaultDeviceFactory.createDigitalOutputDevice(DefaultDeviceFactory.java:256)
        at com.diozero.internal.spi.GpioDeviceFactoryInterface.provisionDigitalOutputDevice(GpioDeviceFactoryInterface.java:84)
        at com.diozero.api.DigitalOutputDevice.<init>(DigitalOutputDevice.java:158)
        at com.diozero.api.DigitalOutputDevice.<init>(DigitalOutputDevice.java:142)

Scenario 4 (diozero.gpio.chardev=true) First init of new DigitalOutputDevice works fine. First init of new DigitalInputDevice fails with following error:

java.lang.IndexOutOfBoundsException
        at java.base/java.nio.Buffer.checkIndex(Unknown Source)
        at java.base/java.nio.DirectIntBufferU.get(Unknown Source)
        at com.diozero.util.MmapIntBuffer.get(MmapIntBuffer.java:56)
        at com.diozero.internal.board.tinkerboard.TinkerBoardMmapGpio.setPullUpDown(TinkerBoardMmapGpio.java:281)
        at com.diozero.internal.provider.builtin.NativeGpioInputDevice.<init>(NativeGpioInputDevice.java:69)
        at com.diozero.internal.provider.builtin.DefaultDeviceFactory.createDigitalInputDevice(DefaultDeviceFactory.java:240)
        at com.diozero.internal.spi.GpioDeviceFactoryInterface.provisionDigitalInputDevice(GpioDeviceFactoryInterface.java:61)
        at com.diozero.api.DigitalInputDevice.<init>(DigitalInputDevice.java:195)
        at com.diozero.api.DigitalInputDevice.<init>(DigitalInputDevice.java:175)

After close all initialized pins and without call shutdown method Second init of new DigitalOutputDevice works fine. Second init of new DigitalInputDevice fails with following error:

Error setting line event: Device or resource busy
com.diozero.api.RuntimeIOException: Error in provisionGpioInputDevice: -16
        at com.diozero.internal.provider.builtin.gpio.GpioChip.provisionGpioInputDevice(GpioChip.java:203)
        at com.diozero.internal.provider.builtin.NativeGpioInputDevice.<init>(NativeGpioInputDevice.java:65)
        at com.diozero.internal.provider.builtin.DefaultDeviceFactory.createDigitalInputDevice(DefaultDeviceFactory.java:240)
        at com.diozero.internal.spi.GpioDeviceFactoryInterface.provisionDigitalInputDevice(GpioDeviceFactoryInterface.java:61)
        at com.diozero.api.DigitalInputDevice.<init>(DigitalInputDevice.java:195)
        at com.diozero.api.DigitalInputDevice.<init>(DigitalInputDevice.java:175)

I am available to provide further data and tests Thank you