040000 tree c0b00aad9f3c39bfe4b92526d84cbde5cbb76744	elf2uf2
160000 commit 77eae2836638baf2f61b321eb61125da99bb4445	pico-extras
160000 commit 2062372d203b372849d573f252cf7c6dc2800c0a	pico-sdk
160000 commit 64a4b16be46435f6aacbf29f5fb70c355ff90216	pigweed