mk: Add Erle-Brain 2 support

mk/environ.mk

@@ -168,6 +168,11 @@ HAL_BOARD = HAL_BOARD_LINUX
 HAL_BOARD_SUBTYPE = HAL_BOARD_SUBTYPE_LINUX_RASPILOT
 endif
 
+ifneq ($(findstring erlebrain2, $(MAKECMDGOALS)),)
+HAL_BOARD = HAL_BOARD_LINUX
+HAL_BOARD_SUBTYPE = HAL_BOARD_SUBTYPE_LINUX_ERLEBRAIN2
+endif
+
 ifneq ($(findstring bbbmini, $(MAKECMDGOALS)),)
 HAL_BOARD = HAL_BOARD_LINUX
 HAL_BOARD_SUBTYPE = HAL_BOARD_SUBTYPE_LINUX_BBBMINI

mk/help.mk

@@ -33,3 +33,4 @@ help:
 	@echo "  raspilot - the RaspberryPi + pilot cape combination"
 	@echo "  erleboard - the ErleBoard legacy design"
 	@echo "  minlure - the drone lure for MinnowBoard and others"
+	@echo "  erlebrain2 - the Erle-Brain 2 board"

mk/targets.mk

@@ -52,6 +52,10 @@ raspilot: HAL_BOARD = HAL_BOARD_LINUX
 raspilot: TOOLCHAIN = RPI
 raspilot: all
  
+erlebrain2: HAL_BOARD = HAL_BOARD_LINUX
+erlebrain2: TOOLCHAIN = RPI
+erlebrain2: all
+
 bbbmini: HAL_BOARD = HAL_BOARD_LINUX
 bbbmini: TOOLCHAIN = BBONE
 bbbmini: all
@@ -75,7 +79,7 @@ empty: all
 
 # cope with copter and hil targets
 FRAMES = quad tri hexa y6 octa octa-quad heli single coax obc nologging
-BOARDS = apm1 apm2 apm2beta apm1-1280 px4 px4-v1 px4-v2 sitl flymaple linux vrbrain vrbrain-v40 vrbrain-v45 vrbrainv-50 vrbrain-v51 vrbrain-v52 vrubrain-v51 vrubrain-v52 vrhero-v10 erle pxf navio raspilot bbbmini minlure
+BOARDS = apm1 apm2 apm2beta apm1-1280 px4 px4-v1 px4-v2 sitl flymaple linux vrbrain vrbrain-v40 vrbrain-v45 vrbrainv-50 vrbrain-v51 vrbrain-v52 vrubrain-v51 vrubrain-v52 vrhero-v10 erle pxf navio raspilot bbbmini minlure erlebrain2
 
 define frame_template
 $(1)-$(2) : EXTRAFLAGS += "-DFRAME_CONFIG=$(shell echo $(2) | tr a-z A-Z | sed s/-/_/g)_FRAME "