GPIOPin.getValue() always returns false for an output pin

[Peter Saitz]

Hi

I have ported OpenJDK Digital I/O to an embedded board with a Freescale 
i.MX6 Quad processor.
The board is running under Ubunto Linux.
I have built dio.jar on the board, not with a cross compiler.

When I configure a GPIO pin for output, *GPIOPin.getValue()* always 
returns *false*, even if I have called *GPIOPin.setValue(true)* before. 
I have connected a LED on this pin and the LED goes on and off as 
expected, so GPIOPin.setValue(boolean) works fine.

The JavaDoc 
http://docs.oracle.com/javame/8.0/api/dio/api/jdk/dio/gpio/GPIOPin.html#getValue() 
<http://docs.oracle.com/javame/8.0/api/dio/api/jdk/dio/gpio/GPIOPin.html#getValue%28%29> 
says:

    /Returns the current value of this GPIO pin. If the value was not
    set previously using setValue() the device configuration-specific
    default value is returned. This method can be called on both output
    and input pins./
    /Returns: //true if this pin is currently high. /

Here the relevant code from my sources:

    GPIOPinConfig pinConfig = new GPIOPinConfig.Builder()
                         .setControllerNumber(0)
                         .setPinNumber(pinNumber)
    .setDirection(GPIOPinConfig.DIR_OUTPUT_ONLY)
                         .setTrigger(GPIOPinConfig.TRIGGER_NONE)
    .setDriveMode(GPIOPinConfig.MODE_OUTPUT_PUSH_PULL)
                         .setInitValue(true)
                         .build();
    GPIOPin pin = (GPIOPin)DeviceManager.open(GPIOPin.class, pinConfig);

    ...... in another method ......
    pin.setValue(newValue);

    ...... in another method ......
    boolean curValue = pin.getValue();   <<--- always false, even if
    newValue was true


Who can help or fix this bug?

Note:
I'm using the latest release from http://hg.openjdk.java.net/dio/dev

With kind regards
Peter Saitz

-- 
_________________________

Peter Saitz
Software Developer

Savien Technologies GmbH.
Bierhäuselberggasse 31
A-1140 Wien

mailto: peter.saitz at savien.at
phone: +43 699 19650224