Asset InterTech: Using U-boot as production test strategy — really?

https://blog.asset-intertech.com/test_data_out/2018/11/using-u-boot-as-production-test-strategy-really.html

[…]Here is where I see a dilemma with using U-Boot for test. First I have to build U-Boot, and second have enough of the system operational, DDR (DDR controller/PHY) and SD flash interface etc. before testing can begin. Testing often involves non-operational system or minimally functionally operational hardware. The use of U-Boot expects a significant portion of the target hardware operational.

Second, assuming that you were successful in building U-Boot you now need to load it on the flash of the UUT. Be sure to follow the below warning. If U-Boot is already installed and running on your board, you can use these instructions to download another U-Boot image to replace the current one.

Warning: Before you can install the new image, you must erase the current one. If anything goes wrong your board will be dead. It is strongly recommended that you have a backup of the old, working U-Boot image or you know how to install an image on a virgin system.

Next U-Boot has limited testing capabilities.[…]

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