Comments (1)
The Open Bootloader RAM size depends on the number on supported protocols (USART, SPI…), memories (FLASH, SRAM…) and amount of code used.
In case of U5, the provided application supports 5 protocols, 6 memories and besides that it is based on Threadx to be able to support USBx, this is why it needs 90K.
In a product with small RAM, the user can easily adapt the application and remove protocols or memories that he don’t need and save RAM.
For example, you can check the Open Bootloader application of WL in WL Open Bootloader GitHub Page, this application only supports USART and SP1 and only needs 6k
of RAM.
You can check the app_openbootloader.c
file under …\Applications\OpenBootloader\OpenBootloader\App\
for more details about how to add or remove protocols or memories.
Hope this helps.
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