[riot-notifications] [RIOT-OS/RIOT] cpu/cortexm_common: function to check address validity (#11358)
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Mon Apr 8 18:42:25 CEST 2019
### Contribution description
This PR retakes the work done in #10051. The PR was ready to merge except for missing white-list in the new test. As discussed in #10051, this is exactly the same PR but adding some boards to the test white-list. The rest of the PR description is as it was in the original one from @olegart.
Adds extremely useful function to check memory addresses for validity on Cortex-M3/M4/M7 MCUs.
Can be used to determine memory sizes, peripherals availability, etc. in run-time to build firmware that runs effectively on a different MCUs without recompiling.
### Testing procedure
Build and run tests/cpu_cortexm_address_check for your board, then type 'check address' in the shell, where address is a memory address in hex notation (with '0x' prefix). Check your MCUs' datasheet for memory map.
E.g. on STM32L152RET6:
Address 0x1ff02000 is NOT valid. Accessing it will result in BusFault
Address 0x1ff01999 is valid. Feel free to access it
(0x1FF01999 is an upper address of the System Memory section)
### Issues/PRs references
You can view, comment on, or merge this pull request online at:
-- Commit Summary --
* cpu/cortexm_common: function to check address validity
-- File Changes --
M cpu/cortexm_common/cortexm_init.c (47)
M cpu/cortexm_common/include/cpu.h (11)
M cpu/cortexm_common/vectors_cortexm.c (18)
A tests/cpu_cortexm_address_check/Makefile (16)
A tests/cpu_cortexm_address_check/README.md (12)
A tests/cpu_cortexm_address_check/main.c (65)
-- Patch Links --
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