Issue with clearing the Interrupt signal

[zytegalaxy]

Expected behavior:

The interrupt flag is set to reset automatically at every read action from the value (IO) registers.

Issue:

The interrupt does not seem to always reset and the behavior is sporadic.

Possible fixes:

According to the datasheet, a write action to read-only IO registers is required to reset the flag.

I ended up doing this in my code in a dirty way by writing to these registers in the python code.

    def reset_interrupt_flags(self, i2c):
        # Write to both registers to reset the interrupt flag
        buffer = bytearray(2)
        buffer[0] = 0x00
        buffer[1] = 0x00
        i2c.write(buffer)
        i2c.write_then_readinto(buffer, buffer, out_end=1, in_start=1)
        #print(buffer)
        time.sleep(0.1)
        buffer[0] = 0x01
        buffer[1] = 0x00
        i2c.write(buffer)
        i2c.write_then_readinto(buffer, buffer, out_end=1, in_start=1)
        time.sleep(0.1)

This logic should be abstracted out in the software so that every read automatically resets the interrupt or have a method expose to explicitly reset the interrupt.

You can see my project code that utilizes AW9523 here:

https://github.com/ubopod/ubo-sdk/blob/main/ubo_keypad/ubo_keypad.py

On the hardware side, it is best not to have floating input pins in hardware and make sure they are pulled up/down)

• disabling interrupt for register bit (pins) that are not listening in the code.

[FoamyGuy]

Sorry there was such a delay before a response.

I tried to have a look into this, I'm not able to find reference in the datasheet to what you mentioned about needing to write to a read-only register being required.

If you're still around and happen to know any more specific where to find that within the datasheet please let us know.