Contact person: Business Client

Phone:Show

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Location: Milan, Italy

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I have a fully working bootloader for the ATSAMD21G18A and now need a customised version that can autonomously update firmware stored on an external NOR-based SPI flash. Here is what I expect:

• On every power-up or reset the bootloader must check the external SPI NOR flash for a new firmware image (.bin).
• If a new image exists, copy it into the internal MCU flash, verify it with a CRC-16 check, and then erase the external copy.
• If no new image is found—or if validation fails—the existing internal firmware must run untouched.
• A safe-boot mechanism is required: if power is lost during the transfer, the MCU must still start with a valid image on the next boot.

I will supply:
– The current bootloader source and binaries as a reference.
– Hardware with the ATSAMD21G18A and the connected SPI NOR flash for testing and validation.

Please deliver:
1. Fully commented source code for the new bootloader, compatible with Atmel Studio / GCC.
2. A concise build script or project file.
3. A short test routine a successful field update, CRC-16 verification and power-loss recovery.
4. A test to show the DFU process success.
5. Step-by-step flashing and validation instructions so I can reproduce your results on my hardware.

Experience with SAM-D21 flash controllers, SPI NOR flash interfaces and robust in-field firmware updates is essential." (client-provided description)