040000 tree 4f297ad5c55590fdaccd836192bdd3110ccdddc8	arch
100644 blob 7eb7968f5b5d46d7162de7bf5b7ede26aade3d7a	hal_os_tick.c
100644 blob f45ac48c4a42409e48e782c55e2980b3c47b7d41	hal_system.c
100644 blob 55fdd00bfa3e02b6978ae8dc7e7bdfc9806818ba	hal_timer.c
100644 blob 930fc22eb16b98857bf59da73614b5209728a32c	hal_watchdog.c