Getting Started using Arm® TrustZone® for Cortex®-M Processors
TrustZone for Cortex-M processors is on the way! There has already been an announcement from Nuvoton that they will be releasing the worlds first Cortex-M23 processor, the Cortex-M2351, that will include support for Arm TrustZone. The problem for many IoT developers though is that they are ready to start learning TrustZone now but don’t have …
Improve Debug Efficiency with the ITM
Let’s face it. No matter how sophisticated our debug tools get, there will always be a place for an old fashioned printf statement. Unfortunately, printf tends be efficient and can dramatically affect the systems real-time performance. For developers using an Arm Cortex®-M3 or better, printf can be remapped to the Instrumentation Trace Macrocell (ITM) which …
The first ARMv8-M MCU with TrustZone Support
We’ve been hearing for several years now that Arm Cortex-M processors would soon be getting a security upgrade by supporting TrustZone in the M23/M33 microcontrollers. The wait is finally over! Microchip has publicly released the first TrustZone compatible microcontrollers based on the low-power M23 core, the SAM L11. In this post, we will walk through …
3 Ways to Perform a Worst-Case Stack Analysis
Figuring out how to size the stack for an embedded application and the tasks within it can be challenging. In many cases, developers will pick a value that they feel should be enough. These estimates are sometimes a little short, most of the time a gross estimation and rarely spot on. While I always encourage …
