pass mcu option from compiler

examples/device/device_composite/ses/device_composite.emProject

@@ -19,7 +19,7 @@
       arm_target_device_name="nRF52840_xxAA"
       arm_target_interface_type="SWD"
       build_treat_warnings_as_errors="Yes"
-      c_preprocessor_definitions="NRF52840_XXAA;__nRF_FAMILY;ARM_MATH_CM4;FLASH_PLACEMENT=1;BOARD_PCA10056"
+      c_preprocessor_definitions="NRF52840_XXAA;__nRF_FAMILY;ARM_MATH_CM4;FLASH_PLACEMENT=1;BOARD_PCA10056;CFG_TUSB_MCU=OPT_MCU_NRF5X"
       c_user_include_directories="../src;$(rootDir)/hw/cmsis/Include;$(rootDir)/hw;$(rootDir)/src;$(nrfxDir)/..;$(nrfxDir);$(nrfxDir)/mdk;$(nrfxDir)/hal;$(nrfxDir)/drivers/include"
       debug_register_definition_file="ses_nrf5x/nrf52840_Registers.xml"
       debug_target_connection="J-Link"
@@ -118,7 +118,7 @@
       arm_target_device_name="ATSAMD51J19"
       arm_target_interface_type="SWD"
       build_treat_warnings_as_errors="Yes"
-      c_preprocessor_definitions="__SAME51_FAMILY;__SAMD51J19A__;ARM_MATH_CM4;FLASH_PLACEMENT=1;BOARD_METRO_M4_EXPRESS;USE_SIMPLE_ASSERT"
+      c_preprocessor_definitions="__SAME51_FAMILY;__SAMD51J19A__;ARM_MATH_CM4;FLASH_PLACEMENT=1;USE_SIMPLE_ASSERT;BOARD_METRO_M4_EXPRESS;CFG_TUSB_MCU=OPT_MCU_SAMD51"
       c_user_include_directories="../src;$(rootDir)/hw/cmsis/Include;$(rootDir)/hw;$(rootDir)/src;$(asf4Dir);$(asf4Dir)/include;$(asf4Dir)/hri;$(asf4Dir)/hal/include;$(asf4Dir)/hal/utils/include;$(asf4Dir)/hpl/port"
       debug_register_definition_file="ses_samd51/ATSAME51J19A_Registers.xml"
       debug_target_connection="J-Link"

examples/device/device_composite/src/tusb_config.h

@@ -48,7 +48,12 @@
 //--------------------------------------------------------------------
 // COMMON CONFIGURATION
 //--------------------------------------------------------------------
-#define CFG_TUSB_MCU                OPT_MCU_NRF5X
+
+// defined by compiler flags for flexibility
+#ifndef CFG_TUSB_MCU
+  #error CFG_TUSB_MCU should be defined using compiler flags
+#endif
+
 #define CFG_TUSB_RHPORT0_MODE       OPT_MODE_DEVICE
 
 #define CFG_TUSB_DEBUG              2

examples/device/nrf52840_freertos/segger/nrf5x_freertos.emProject

@@ -19,7 +19,7 @@
       arm_target_device_name="nRF52840_xxAA"
       arm_target_interface_type="SWD"
       build_treat_warnings_as_errors="Yes"
-      c_preprocessor_definitions="NRF52840_XXAA;__nRF_FAMILY;ARM_MATH_CM4;FLASH_PLACEMENT=1;BOARD_PCA10056"
+      c_preprocessor_definitions="NRF52840_XXAA;__nRF_FAMILY;ARM_MATH_CM4;FLASH_PLACEMENT=1;BOARD_PCA10056;CFG_TUSB_MCU=OPT_MCU_NRF5X"
       c_user_include_directories="../src;$(tusbDir)/hw/cmsis/Include;$(tusbDir)/hw;$(tusbDir)/src;$(nrfxDir)/..;$(nrfxDir);$(nrfxDir)/mdk;$(nrfxDir)/hal;$(nrfxDir)/drivers/include;$(freertosDir)/Source/include;$(freertosDir)/Source/portable/GCC/ARM_CM4F"
       debug_register_definition_file="$(ProjectDir)/nrf52840_Registers.xml"
       debug_target_connection="J-Link"