ARM processor cores implementing the v7-M architecture, currently Cortex-M3 and Cortex-M4, include a component called the "Flash Patch and Breakpoint" Unit (FPB). Besides being used by debug tools to provide a hardware breakpoint mechanism, FPB provides a mechanism for patching immutable program code or literal constants in firmware by redirecting memory accesses. This paper will show you an MCU-vendor independent approach to do this.
Click here to watch a recording of the presentation by David Cabanis, complete with slides and an audio narrative.
Click here to download the full paper in PDF format. In exchange, we will ask you to enter some personal details. To read about how we use your details, click here. On the registration form, you will be asked whether you want us to send you further information concerning other Doulos products and services in the subject area concerned.