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VoidStar Security Blog
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Brushing Up on Hardware Hacking Part 3 - SWD and OpenOCD
https://voidstarsec.com/blog/brushing-up-part-3
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In this post we discuss how to commuinicate with an unsupported chip using OpenOCD and review how to write flash programming algorithms in OpenOCD. We also demonstrate how to flash custom firmware to the target device.