Setting the stageįor this example, we’ll be using the same setup as we did in our previous Zero
CREATING PROJECT M BOOT.ELF UPDATE
We’ll need to decide on a memory map, write some bootloader code, and update ourĪpplication to make it bootload-able. Let’s build a simple bootloader together. Your bootloader can, for example, verify aĬryptographic signature to make sure the application has not been replaced or Last but certainly not least, bootloaders are an essential component of a Logic so your device can recover no matter how bad a bug ships in your For example, your bootloader may contain firmware update Non-executable storage, such as a SPI flash, to an area of memory that can beīootloaders also allow you to decouple parts of the program that are missionĬritical, or that have security implications, from application code whichĬhanges regularly. In that case, it is the bootloader’s job to copy code from Have little to no onboard flash and instead rely on an external device to storeįirmware code. Most commonly, you may need a bootloader to load your software.
Bootloaders serve many purposes, ranging from security to software architecture.
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