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Pi4J / pi4j-v1

DEPRECATED Java I/O library for Raspberry Pi (GPIO, I2C, SPI, UART)
http://www.pi4j.com
Apache License 2.0
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Unable to open GPIO direction interface for pin [22] #532

Closed zhouhuabin closed 3 years ago

zhouhuabin commented 3 years ago

I'm testing WiringPiGpioExample.java with JDK8 32bit , use BROADCOM pin schema, every times I got three errors,broadcom pin number 4 , 20 ,22 export error. but I write python programs, run it ,all pins are exported is OK. I could not understand why? here is output: user home is /home/pi/java_code/all_code CLASSPATH: ../userlib/pi4j-core.jar:../userlib/pi4j-device.jar:../userlib/pi4j-gpio-extension.jar:/home/pi/java_code/all_code:classes ,start path: /home/pi/java_code/all_code platform:RASPBERRYPI <--Pi4J--> GPIO test program version:1.3 export pin=31 is OK. export pin=30 is OK. export pin=2 is OK. export pin=17 is OK. export pin=16 is OK. export pin=4 error,msg:Unable to open GPIO direction interface for pin [4]: No such file or directory

start WiringPiGpioExample on pid: 4248 at Mon Mar 22 15:16:25 CST 2021 export pin=15 is OK. export pin=3 is OK. export pin=14 is OK. export pin=6 is OK. export pin=13 is OK. export pin=5 is OK. export pin=12 is OK. export pin=8 is OK. export pin=11 is OK. export pin=7 is OK. export pin=10 is OK. export pin=9 is OK. export pin=19 is OK. export pin=18 is OK. export pin=20 error,msg:Unable to open GPIO direction interface for pin [20]: No such file or directory

export pin=28 is OK. export pin=27 is OK. export pin=26 is OK. export pin=25 is OK. export pin=24 is OK. export pin=23 is OK. export pin=22 error,msg:Unable to open GPIO direction interface for pin [22]: No such file or directory

export pin=21 is OK. export pin=29 is OK. java code: import java.net.URL; import java.net.URLClassLoader; import java.util.jar.Attributes; import java.util.jar.Manifest; import com.pi4j.io.gpio.GpioFactory; import com.pi4j.io.gpio.Pin; import com.pi4j.io.gpio.RaspiBcmPin; import com.pi4j.io.gpio.RaspiGpioProvider; import com.pi4j.io.gpio.RaspiPin; import com.pi4j.io.gpio.RaspiPinNumberingScheme; import com.pi4j.platform.Platform; import com.pi4j.wiringpi.Gpio; import com.pi4j.wiringpi.GpioUtil;

public class WiringPiGpioExample { public static void main(String args[]) throws Exception { int pin; int dataPtr; int l, s, d; Platform pl = com.pi4j.platform.PlatformManager.getPlatform(); System.out.println("platform:"+pl.toString());

    System.out.println("<--Pi4J--> GPIO test program");
    URLClassLoader cl = (URLClassLoader) (com.pi4j.platform.PlatformManager.class.getClassLoader());
    URL url = cl.findResource("META-INF/MANIFEST.MF");
    Manifest manifest = new Manifest(url.openStream());
    Attributes attributes = manifest.getMainAttributes();
    String version = attributes.getValue("Bundle-Version");//Implementation-
    System.out.println("version:"+version);
    // setup wiringPi
    if (Gpio.wiringPiSetup() == -1) {
        System.out.println(" ==>> GPIO SETUP FAILED");
        return;
    }
    GpioFactory.setDefaultProvider(new RaspiGpioProvider(RaspiPinNumberingScheme.BROADCOM_PIN_NUMBERING));

    Pin[] allPins=RaspiBcmPin.allPins();
    // set all other GPIO as outputs
    for (pin = 0; pin < allPins.length; ++pin) {
        // export all the GPIO pins that we will be using
        try {
            GpioUtil.export(allPins[pin].getAddress(), GpioUtil.DIRECTION_OUT);
            Gpio.pinMode(allPins[pin].getAddress(), Gpio.OUTPUT);
            GpioUtil.unexport(allPins[pin].getAddress());
            System.out.println("export pin="+allPins[pin].getAddress()+" is OK.");
        }catch(Exception e) {
            System.err.println("export pin="+allPins[pin].getAddress()+" error,msg:"+e.getLocalizedMessage());
        }
    }
}

}

savageautomate commented 3 years ago

Which Raspberry Pi model are you using? If its one of the newer models (4B, 400, CM4, etc) then you will need this version of WiringPi: https://github.com/WiringPi/WiringPi

There is a section on this page that shows how to install latest WiringPi: https://pi4j.com/1.3/dependency.html

zhouhuabin commented 3 years ago

Thanks for your message. I'm using 4B, wiringPi is 2.52.,and i run command in /sys/class/gpio: echo 3 >export is OK. pi@raspberrypi:~ $ gpio -v gpio version: 2.52 Copyright (c) 2012-2018 Gordon Henderson This is free software with ABSOLUTELY NO WARRANTY. For details type: gpio -warranty Raspberry Pi Details: Type: Pi 4B, Revision: 02, Memory: 2048MB, Maker: Sony

FDelporte commented 3 years ago

For full support of Raspberry Pi 4 you will need a newer version of WiringPi. There is no official one available but Pi4J V1.3 and V1.4 provide a way to get it from a GitHub fork, see https://pi4j.com/1.4/install.html sudo pi4j --wiringpi

zhouhuabin commented 3 years ago

now I had installed the lasted WiringPi to 2.60,but problems also exists, why just BCM pin GPIO_04,GPIO_20,GPIO_22 export fail, other bcm pin number export succeed? pi@raspberrypi:~ $ gpio -v gpio version: 2.60 Copyright (c) 2012-2018 Gordon Henderson This is free software with ABSOLUTELY NO WARRANTY. For details type: gpio -warranty Raspberry Pi Details: Type: Pi 4B, Revision: 02, Memory: 2048MB, Maker: Sony

zhouhuabin commented 3 years ago

now i run gpio export command,error is : Device or resource busy, bcm pin number 4,20,22 with eth same error. How could I fix it? pi@raspberrypi:/sys/class/gpio $ echo 22 > export bash: echo: write error: Device or resource busy

zhouhuabin commented 3 years ago

Finally I resolved my issue , and avoid using gpio.provisionDigitalInputPin method : gpio.provisionDigitalInputPin(RaspiBcmPin.GPIO_22, "input",PinPullResistance.PULL_UP); I just use Gpio.pinMode(bcm_TiltPin, Gpio.INPUT); then read value like this: int value = Gpio.digitalRead(bcm_TiltPin); not use : int value = aihome_tiltPin.getState().getValue();