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Nios II MPU Usage
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时间:2020-03-06
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【应用手册】Nios II MPU Usage This application note covers the basic features of the Nios® II processor’s optional memory protection unit (MPU), describing how to use it without the support of an operating system (OS). When the Nios II MPU is enabled and properly configured, it monitors all processor data and instruction accesses and triggers exceptions when illegal accesses are attempted. This application note includes two design examples, with notes about how the examples work. These examples walk you through making use of the Nios II processor's MPU in an environment based on the Altera® hardware abstraction layer (HAL), without an OS. One of the examples uses the MPU to detect the following three issues commonly seen when debugging embedded systems: ■ Stack overflow ■ Null pointer ■ Wild pointer Nios II MPU Usage March 2010 AN-540-1.0 Introduction This application note covers the basic features of the Nios II processor’s optional memory protection unit (MPU), describing how to use it without the support of an operating system (OS). When the Nios II MPU is enabled and properly configured, it monitors all processor data and instruction accesses and triggers exceptions when illegal accesses are attempted. This application note includes two design examples……
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