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* emulation on host: Add full UART driver emulation. This PR replaces the high level Serial mock with a more complete UART driver. This way the HardwareSerial works without any modifications. Additionally the driver supports UART0 and UART1 at the same time (UART0 is directed to stdout and UART1 writes to stderr). RX is implemented by switching the terminal into raw non-blocking mode and injecting each key-press directly into the FIFO of UART0. A new command line switch -c was added to ignore CTRL-C and send it via serial as well. The decumentation was updated accordingly. Reading and setting of GPIOs does only write to stderr, when compiled with D=1. But this is subject to be replaced with a proper GPIO emu anyway. Reading from GPIO0 now returns 1 instead of 0 because this is most likely a low active input. * Fixed unused variable. * Remove unused functions, as long as there are no debug macros using them. * Move user_interface.cc from MOCK_CPP_FILES_EMU to MOCK_CPP_FILES. * Move optimistic_yield() from user_interface.cpp to Arduino.cpp * Remove atexit() weak declaration (fixes segfault when calling atexit). * Improve resetting of terminal after program exit, convert \r to \r\n. * Show error, when STDOUT is not a TTY, minor code cleanung.
Host Tests for Continuous Integration ------------------------------------- make FORCE32=0 OPTZ=-O0 CI (FORCE32=0: https://bugs.launchpad.net/ubuntu/+source/valgrind/+bug/948004) Sketch emulation on host ------------------------ This environment let compile esp8266/Arduino sketches into native environment. Network (tcp, udp, including ssl and multicast) is linked to local host interfaces. WiFi is trivialy emulated and reported as "just" already connected and usable. Currently network emulation is a complete rewrite of WiFiClient+WiFiServer/ClientContext and WifiUdp/UdpContext using socket posix API. Further work will optionally propose native lwIP library instead. Serial UART0 and UART1 are emulated via stdin/stdout/stderr. Therefor stdin is connected to UART0(RX) and stdout is connected to UART0(TX). UART1(TX) writes to stderr. Reading from stdin happens in non-blocking raw mode, that means each character is directly injected into the UART FIFO without any buffering in the console. The command line switch -c can be used to stop the emulation from intersepting CTRL-C (SIGINT). How to compile and run a sketch ------------------------------- All results are stored in ./bin/ . Show the core example list: make list Build one example make D=1 ../../libraries/esp8266/examples/Blink/Blink run it: ./bin/Blink/Blink -h Optional 'V=1' enables makefile verbosity Optional 'D=1' enables core debug (same as IDE's tools menu) Optional 'OPTZ=-O2' will update gcc -O option (default is -Os, D=1 implies -O0) Optional 'FORCE32=0' will use native/default gcc (default is FORCE32=1 unless gcc-multilib is not detected) Non exhaustive list of working examples: make D=1 ../../libraries/ESP8266WiFi/examples/udp/udp make D=1 ../../libraries/ESP8266WiFi/examples/WiFiClient/WiFiClient make D=1 ../../libraries/ESP8266WebServer/examples/HelloServer/HelloServer make D=1 ../../libraries/ESP8266WebServer/examples/AdvancedWebServer/AdvancedWebServer make D=1 ../../libraries/ESP8266mDNS/examples/mDNS_Web_Server/mDNS_Web_Server make D=1 ../../libraries/ESP8266WiFi/examples/BearSSL_Validation/BearSSL_Validation Compile other sketches: - library paths are specified using ULIBDIRS variable, separated by ':' - call 'make path-to-the-sketch-file' to build (without its '.ino' extension): - CAVEAT: functions must be declared *before* being called (arduino builder is not around) make D=1 ULIBDIRS=/path/to/your/arduino/libraries/lib1:/path/to/another/place/lib2 /path/to/your/sketchdir/sketch/sketch or: ULIBDIRS=/path/to/your/arduino/libraries/lib1:/path/to/another/place/lib2 make D=1 /path/to/your/sketchdir/sketch/sketch or (preferred): export ULIBDIRS=/path/to/your/arduino/libraries/lib1:/path/to/another/place/lib2 export D=1 export OPTZ=-O2 make clean make /path/to/your/sketchdir/sketch/sketch ./bin/sketch/sketch Executable location is always in bin/. Once a sketch is compiled, just run it: bin/sketch/sketch Options are available: -h -i eth0 bind servers to this interface (WIP) -l bind Multicast to the above interface (WIP) -c ignore CTRL-C (send it over serial device) -f no throttle (possibly 100%CPU) -S spiffs size in KBytes (default: 1024) (negative value will force mismatched size) TODO ---- A lot. Make fun, propose PRs. - replace some "fprintf(stderr" with redirectable log functions - spiffs in a file (done, need to initialize and check) - EEPROM in a file (partly done) - SDCARD on Host filesystem ? or in an image ? - nice curses interface to display/change gpios ? - display device emulation (like ssd1306) - optionaly use arduino-builder ? - store sketch objects and binaries outside from the source directories (done for sketches) - compile and use lwIP on host - easily debug HTTP classes - https://github.com/esp8266/Arduino/issues/1715 - gpio, currently: read as 0(digital) or 512(analog). output is printed on console.