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Some of the system exceptions are used to signal and handle specific faults.
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Aside from the reset exception, it has the highest priority of all exceptions. If errors happen in other exception handlers, an NMI will be triggered.
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Allows another pending interrupt to be serviced without a full restore/save for processor context (this feature is called tail-chaining)Įxceptions can be fired by various events including:Įxceptions that get fired by an internal source to the system and not by any external hardware or peripherals.Allows late determination of highest priority pending interrupt.Automatically saves and restores processor context.The interrupt entry and exit are hardware implemented in order to reduce the latency and speed up the response. Handler Mode: Which is entered on all other exceptions.Thread Mode: Which is entered on reset.And it can be in one of the following modes: The processor mode can change when exceptions occur. The interrupt architecture and priorities are very flexible and highly configurable to support RTOS. Which offloads this work overhead from the CPU. Micro-Coded Architecture So that interrupt stacking, entry, and exit are done automatically in hardware. Which includes the Nested Vectored Interrupt Controller (NVIC). ARM ® v7 Cortex™ Exceptions / InterruptsĪRM v7 Core supports multiple great features for handling exceptions and interrupts.