STM32F4xx上的Core Coupled Memory可执行文件？ [英] Core Coupled Memory executable on STM32F4xx?

问题描述

试图从STM32F429s CCM运行代码，但我总是在遇到CCM中的第一条指令时就立即设置IBUSERR标志来进行硬故障。

Trying to run code from a STM32F429s CCM but I always get a Hard Fault with the IBUSERR flag set as soon as I hit the first instruction in the CCM.

该指令有效且对齐良好。
STM32F4xx是否可能不允许从CCM执行？ （数据访问效果很好）。

The instruction is valid and well aligned. Is it possible that the STM32F4xx does not allow execution from the CCM? (Data access works well).

alios

推荐答案

CCM在这些部分中仅连接到数据总线。无法从此存储器中获取指令-只能将闪存，SRAM1和外部存储器用于代码。

The CCM in these parts is only connected to the data bus. Instructions cannot be fetched from this memory -- only flash memory, SRAM1, and external memory should be used for code.

有关更多信息，请参见参考手册，这是上图的来源。

For more information, refer to section 2.1 ("System Architecture") of the reference manual, which is where the above image came from.

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