updated README and CHANGELOG

-updated README and CHANGELOG

CHANGELOG.md

@@ -5,6 +5,25 @@
 
 # Changelog
 
+## [1.2.4] - 2021-12-10
+
+Version 1.2.4 is a minor revision and improves a couple of functionalities.
+The following things were changed:
+
+### Added
+  - new set of settings commands to control EEPROM/Flash storing (optional build setting ENABLE_SETTING_EXTRA_CMDS in cnc_config.h active by default) (#70)
+
+    This set of new commands allow a more granular control over the settings stored in EEPROM/Flash to prevent wearing.
+    When enabled all grbl $x=val are only changed in SRAM. To set them in non volatile memory a save command must be issued.
+    3 additional commands are added:
+    $SS - Settings save. This stores all values to EEPROM/Flash
+    $SL - Settings load. This loads all values from EEPROM/Flash
+    $SR - Settings reset. This loads all default values from ROM
+
+### Changed
+  - enabled Grbl startup emulation to improve µCNC compatibility. Many Grbl interfaces expect the grbl startup message and won't recognize µCNC because of that simple fact (#70)
+  - changed tinyUSB config and descriptors file location and updated makefile for STM32  (#70)
+
 ## [1.2.3] - 2021-12-08
 
 Version 1.2.3 is a minor revision and improves a couple of functionalities.
@@ -288,6 +307,7 @@ Version 1.1.0 comes with many added features and improvements over the previous
 
 ### Initial release
 
+[1.2.4]: https://github.com/Paciente8159/uCNC/releases/tag/v1.2.4
 [1.2.3]: https://github.com/Paciente8159/uCNC/releases/tag/v1.2.3
 [1.2.2]: https://github.com/Paciente8159/uCNC/releases/tag/v1.2.2
 [1.2.1]: https://github.com/Paciente8159/uCNC/releases/tag/v1.2.1

README.md

@@ -22,7 +22,9 @@ Heavily inspired by the by [Grbl](https://github.com/gnea/grbl) and [LinuxCNC](h
 [![paypal](https://www.paypalobjects.com/webstatic/en_US/i/buttons/PP_logo_h_100x26.png)](https://www.paypal.me/paciente8159)
 
 ## Current µCNC status
-µCNC current version is v1.2.3. You can check all the changes and bug fixes in the [CHANGELOG](https://github.com/Paciente8159/uCNC/blob/master/CHANGELOG.md).
+µCNC current version is v1.2.4. You can check all the changes and bug fixes in the [CHANGELOG](https://github.com/Paciente8159/uCNC/blob/master/CHANGELOG.md).
+Many software expect the Grbl startup message and because of that µCNC is not recognized. To address that the Grbl emulation is now active by default.
+
 Version 1.2 added lot of new features needed for the future hardware/features support and some important bug fixes.
 These include: