In the early days of embedded systems, hardware details were hardcoded directly into the OS kernel. If you had a slightly different version of a chip or a different peripheral layout, you had to recompile the entire kernel. This was a maintenance nightmare.
Lena pointed at the main computer core—a ruggedized ARM board no bigger than a deck of cards. “This chip doesn’t know what hardware it’s attached to. The GPS, the pumps, the rudder sensor—none of it. The DTB is its map.” dtb firmware
Symptom: The kernel boots but later crashes when drivers initialize DMA or memory-mapped I/O.
Cause: The firmware placed the DTB in a memory region that the kernel later reclaims for user space, overwriting it. In U-Boot, common safe addresses are 0x40000000 or 0x44000000 on 32-bit systems.
Fix: Use a high memory offset. Check your board's CONFIG_SYS_LOAD_ADDR. In the early days of embedded systems, hardware
How to use PWM on Xavier NX - Jetson Xavier NX - NVIDIA Developer Forums. NVIDIA Developer Forums Configuring the Jetson Expansion Headers Lena pointed at the main computer core—a ruggedized