# RT-Thread nano v3.1.5 Change Log

Change log since v3.1.3

## Kernel

- update src from released rt-thread v3.1.5
- update code style and license

## libcpu

- add cortex-m23 
- add cortex-m33 

## components

- add device.c

## bsp

- add samples for gd32e230k-msh
- add samples for lpc55s69-blink

