Add some stuff from my recent work

Author: James Munns

content/2019-11-28-newsletter-21.md

@@ -32,10 +32,15 @@ If you want to mention something in [the next newsletter], send us a pull reques
 
 <!-- TODO Add news related to embedded Rust that are not about new crates releases here -->
 
+- [@jamesmunns] streamed some work on developing interrupt and panic code [on youtube]
+
 - TODO(remove, this is an example) "const generics" has landed in nightly!
 
 - TODO(remove, this is an example) the Rust compiler has gained cross compilation support for the Xtensa architecture!
 
+[@jamesmunns]: https://github.com/jamesmunns
+[on youtube]: https://www.youtube.com/watch?v=KT6VnwuouPY
+
 ## Embedded Projects
 
 - [@eldruin] released a platform-agnostic [driver for the OPT300x][opt300x-driver] family of ambient light sensors and published a [blog post][opt300x-blog-post] with a picture of the device taking lux measurements.
@@ -46,6 +51,10 @@ If you want to mention something in [the next newsletter], send us a pull reques
 - [@andre-richter] added two new tutorials for the `Operating System development tutorials in Rust on the Raspberry Pi` series:
     - Tutorial 11: [Virtual Memory](https://github.com/rust-embedded/rust-raspi3-OS-tutorials/tree/master/11_virtual_memory)
     - Tutorial 12: [CPU Exceptions: Part 1](https://github.com/rust-embedded/rust-raspi3-OS-tutorials/tree/master/12_cpu_exceptions_part1)
+    
+- [@jamesmunns] released two embedded crates:
+    - [`panic-persist`]: A panic handler crate inspired by `panic-ramdump` that logs panic messages to a region of RAM defined by the user, allowing for discovery of panic messages post-mortem using normal program control flow.
+    - [`cmim`], or Cortex-M Interrupt Move: A crate for Cortex-M devices to move data to interrupt context, without needing a critical section to access the data within an interrupt, and to remove the need for the "mutex dance"
 
 <!-- TODO Add news about embedded projects here -->
 
@@ -58,6 +67,8 @@ If you have an embedded project or blog post you would like to have featured in
 [@japaric]: https://github.com/japaric
 [`ufmt`]: https://crates.io/crates/ufmt/0.1.0
 [@andre-richter]: https://github.com/andre-richter
+[`panic-persist`]: https://crates.io/crates/panic-persist
+[`cmim`]: https://crates.io/crates/cmim
 
 ## `embedded-hal` Ecosystem Crates