ERROR_GPIO_INTERRUPT_ALREADY_UNMASKED - 15327 (0x3BDF)
The interrupt requested to be unmasked is not masked.
Updated: Feb 21, 2026
Technical Meaning
This error code indicates that an attempt was made to unmask a GPIO interrupt that is already in the unmasked state. Unmasking an interrupt means enabling it so that it can generate interrupts when certain conditions are met.
Error Details
The error ERROR_GPIO_INTERRUPT_ALREADY_UNMASKED (15327, 0x3BDF) suggests that a function or operation was called to unmask an interrupt line that is already active. This implies that the interrupt line has been previously configured and enabled by another process or system component.
Usage Context
This error typically occurs in scenarios where GPIO (General Purpose Input/Output) interrupts are being managed, such as when configuring hardware interfaces or handling low-level device interactions. The specific context could involve kernel-mode drivers or user-mode applications that interact with GPIO pins and their associated interrupt lines.
Developer Interpretation
When encountering this error, developers should ensure that the interrupt line is in a masked state before attempting to unmask it. This can be achieved by checking the current state of the interrupt line using appropriate APIs or by consulting relevant documentation for the specific hardware or driver being used.
Related Errors
ERROR_GPIO_INTERRUPT_NOT_FOUND(0x3BDE): The requested GPIO interrupt does not exist.ERROR_GPIO_INTERRUPT_ALREADY_MASKED(0x3BE0): An attempt was made to mask an already masked interrupt line.
FAQ
Q: What does the error code 15327 mean?
A: It indicates that a request to unmask a GPIO interrupt has been made, but the interrupt is already in the unmasked state.
Q: How can I resolve this issue?
A: Ensure that the interrupt line is masked before attempting to unmask it. Check the current state of the interrupt using appropriate APIs or consult relevant documentation for your hardware or driver.
Summary
The error ERROR_GPIO_INTERRUPT_ALREADY_UNMASKED (15327, 0x3BDF) signifies that an attempt was made to unmask a GPIO interrupt line that is already active. Developers should verify the state of the interrupt before attempting to change its mask status.