Fixed an issue, making the STM32F4Discovery module imcompatible with recent modifications of the core.
Introduced a macro AOS_IOEVENT_FLAG() in aos_types.h.This macro acts similar to EVENT_MASK() and should help to simplify development.The new macro was applied to existing code wherever possible.
All board.mk files have been integrated into the module Makefiles.
Added C++ system calls to the build toolchain in order to make AMiRo-OS fully compatible with C++ code.
Enhanced the main thread IO event configuration.Therefore a new macro AMIROOS_CFG_MAIN_LOOP_IOEVENT_MASK has been introduced.
updated all file headers to 2019
Removed modules/flash.mk since flashing procedures highly depend on hardware.
Introduced a new module: STM32F4Discovery