GCC reports the following warning about ignoring the return value of
write() (to the console/UART in this instance).
common/MockUART.cpp: In function ‘void uart_do_write_char(int, char)’:
common/MockUART.cpp:67:8: warning: ignoring return value of ‘ssize_t write(int, const void*, size_t)’, declared with attribute warn_unused_result [-Wunused-result]
write(uart_nr + 1, &c, 1);
~~~~~^~~~~~~~~~~~~~~~~~~~
Add a simple warning printout to STDERR which may not be the same as the
UART stream and could succeed.
* 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.
