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bootloader: override the 2nd stage bootloader

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Add the possibility to have user bootloader components. This is performed
from an application/project, by creating bootloader components. To do so,
it is required to create a `bootloader_component` directory containing
the custom modules to be compiled with the bootloader.

Thanks to this, two solutions are available to override the bootloader now:
- Using hooks within a user bootloader component
- Using a user defined `main` bootloader component to totally override the
  old implementation

Please check the two new examples in `examples/custom_bootloader`

* Closes https://github.com/espressif/esp-idf/issues/7043
This commit is contained in:
Omar Chebib
2021-04-15 10:31:33 +08:00
parent 82a5f9c4b7
commit a79acb413e
27 changed files with 435 additions and 5 deletions
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4
examples/custom_bootloader/bootloader_hooks/main/component.mk Normal file
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@@ -0,0 +1,4 @@
#
# "main" pseudo-component makefile.
#
# (Uses default behaviour of compiling all source files in directory, adding 'include' to include path.)