It is suggested that when the ARM7TDMI receives an interrupt request, the interrupt service routine starts in ARM state and assembly wrapper code is also required to support nested interrupts.
Additionally, the Cortex-M3 processor introduces a number of features and technologies that meet the specific requirements of the microcontroller applications, such as nonmaskable interrupts for critical tasks, highly deterministic nested vector interrupts, atomic bit manipulation, and an optional memory protection unit.
The local version of RepeatMasker http://www.repeatmasker.org/RMDownload.html produces report files containing all necessary information about element types and coordinates of nested and interrupted elements.
The interrupt controller Nested Vectored Interrupt Controller (NVIC) of the Cortex-M3 processor handles a number of processing tasks, including priority checking and stacking/unstacking of registers.
Interrupts can be nested, so that a lower-priority interrupt service routine can be interrupted by a higher-priority routine.
RE ANNOTATE also provides an optional algorithm for the identification of 'truncated nesting': if one terminus of a given element model interrupts another model, the interrupting element may be classified as nested even if the interrupted element does not contain detectable sequence on both sides of the interrupting element.
In the case of the CDE, core_repository_donor_block_drill-site_diagnosis, the ancestors shown above would need to be included in the TMA file with nesting as shown in Example 4. As always, the insertion of user-created elements is ignored by the validator, even when those elements interrupt a nested hierarchy.
In another rug a fairly staid stack of royal-blue and brick-brown stripes is interrupted by a set of nested turquoise and chrome-yellow diamonds that seem to have arrived from nowhere.
Nesting vectored interrupts is a valid option to increase the responsiveness of the system when one or more lower-priority interrupts need to give way to higher-priority ones.
This chapter explores the possibilities of running a system with two separate stacks, double-word stack alignment, and the Non-base Thread Enable bit in the Nested Vectored Interrupt Controller (NVIC) Configuration Control register.
