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040000 tree 33a7322275800444672fe23a71c29fd3fab4ce6c	bootutil
040000 tree 801fe67011130acc53a43d82a59f7b233cba2942	cypress
040000 tree a673ed003b12be7416a898ee7ec5d328d2d607da	espressif
040000 tree 8c5ac3e8c591d357ef6814d5d8322923b5802e0e	mbed
040000 tree 4624c56dcd193465d599fb620b09bb5272fc86e8	mynewt
040000 tree 45e7c66d10774d476465601af045d9ebc7ad0254	nuttx
040000 tree 609d845ee36accd218eb5bee935a69c0a5a6da99	zephyr