Nucleo-F446RE Build target support

platformio.ini

@@ -24,8 +24,8 @@ default_envs =
 	Teensy3.6
 	Teensy4.0
 	Teensy4.1
-src_dir = .
-include_dir = .
+src_dir = /Users/paul/Projects/CommandStation-EX-devel
+include_dir = /Users/paul/Projects/CommandStation-EX-devel
 
 [env]
 build_flags = -Wall -Wextra
@@ -50,19 +50,6 @@ monitor_speed = 115200
 monitor_echo = yes
 build_flags = -std=c++17
 
-; Firebox disabled for now
-; [env:samc21-firebox]
-; platform = atmelsam
-; board = firebox
-; framework = arduino
-; upload_protocol = atmel-ice
-; lib_deps = 
-;	${env.lib_deps}
-;	SparkFun External EEPROM Arduino Library
-;monitor_speed = 115200
-;monitor_echo = yes
-;build_flags = -std=c++17
-
 [env:mega2560-debug]
 platform = atmelavr
 board = megaatmega2560
@@ -109,9 +96,6 @@ lib_deps =
 	SPI
 monitor_speed = 115200
 monitor_echo = yes
-; Example, but v12 does generate bigger binaries
-; platform_packages = toolchain-atmelavr@symlink:///opt/avr-gcc-12.1.0-x64-linux
-; Should make binaries smaller
 build_flags = -mcall-prologues
 
 [env:mega328]
@@ -160,7 +144,6 @@ lib_deps =
 	SPI
 monitor_speed = 115200
 monitor_echo = yes
-; Should make binaries smaller
 build_flags = -mcall-prologues
 
 [env:nano]
@@ -188,6 +171,15 @@ build_flags = -std=c++17  -Os -g2
 monitor_speed = 115200
 monitor_echo = yes
 
+[env:Nucleo-F446RE]
+platform = ststm32
+board = nucleo_f446re
+framework = arduino
+lib_deps = ${env.lib_deps}
+build_flags = -std=c++17  -Os -g2
+monitor_speed = 115200
+monitor_echo = yes
+
 [env:Teensy3.2]
 platform = teensy
 board = teensy31
@@ -226,4 +218,5 @@ board = teensy41
 framework = arduino
 build_flags = -std=c++17  -Os -g2
 lib_deps = ${env.lib_deps}
-lib_ignore =
+lib_ignore = 
+