Zephyr UDP MSG_TRUNC: The Returned Datagram Length Can Exceed the Bytes Copied
Why does a UDP receive call return more bytes than fit in its buffer, and why does a zero-length MSG_PEEK size probe fail to report the queued datagram size?
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Zephyr Socket Dispatcher: Bind the Interface Before a Helper Selects the Default Backend
Why can a socket intended for one network module use another provider when a library sets an option before SO_BINDTODEVICE?
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Zephyr DMA Filter Callbacks: Do Not Return errno-Style Status from a Boolean Predicate
Why can a custom DMA channel filter reject every valid channel, or accept an invalid one, when its author uses zero for success and a negative errno for rejection?
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Zephyr nrfx Watchdog Channels: Hardware Channel IDs Do Not Create Independent Timeout Windows
Why does a second wdt_install_timeout call fail with -EINVAL when two workers request different timeout values, even though the device has another watchdog channel?
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Zephyr ADC Async Completion: A Zero Signal Result Does Not Certify the Requested Sampling Interval
Why can an interval-overrun path report -EBUSY to a synchronous ADC reader while the asynchronous completion signal carries zero, even though the shared context recorded the overrun?
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Zephyr PWM Channels on One nrfx Instance: A Second Period Can Fail While the First Output Is Active
Why does a second PWM output work alone but return -EINVAL when another channel on the same controller is already generating a different period?
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STM32F401CCU6 Temperature and VBAT Readings: Resolve the Shared ADC18 Path Before Building a Scan
Why does enabling VBAT monitoring replace the temperature result, even when the scan has separate ranks intended for the two internal measurements?
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FreeRTOS Cortex-M4F Scheduler Startup: Do Not Retain Pointers into the main Stack
Why can a task parameter that points to a local object in main become corrupted after scheduler startup even though main never returns?
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STM32H563 HSLV GPIO Mode: Qualify the I/O Supply Before Enabling the Speed Boost
Why is HSLV unsafe as a generic high-speed GPIO setting on a board whose signal bank runs at 3.3 V or can change voltage?
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Yocto IDE Remote Debugging: Trace the Launcher That Sets the Target Program Arguments
Why does changing args in a devtool-generated VSCode launch.json leave the target program arguments unchanged, and why can starting the debug session also replace the target executable?
