Add pio env

Author: BrechtSerckx

platformio.ini

@@ -31,3 +31,19 @@ framework = arduino
 build_flags = -DIS_MCP2515
 lib_deps = 
     https://github.com/sandeepmistry/arduino-CAN.git
+
+[env:stm32f405]
+platform = ststm32
+board = adafruit_feather_f405
+framework = arduino
+build_flags =
+  -DIS_STM32_BUILTIN
+  ; Enable serial.
+  ; See https://github.com/platformio/platform-ststm32/issues/420#issuecomment-672277396
+  -USBCON
+  -DPIO_FRAMEWORK_ARDUINO_ENABLE_CDC
+  ; Enable CAN module in HAL drivers.
+  ; See https://github.com/pazi88/STM32_CAN
+  -DHAL_CAN_MODULE_ENABLED
+lib_deps =
+    https://github.com/pazi88/STM32_CAN.git#1.2.0