Tty device gets only read/write calls, but console retains
getchar/putchar for convenience.
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Previously, transmit was effectively non-blocking - a character either
went into buffer, or -1 was returned. Now it's possible to block if
buffer is full. Timeout is K_FOREVER by default, can be adjusted
with tty_set_tx_timeout() (similar to receive timeout).
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
This allows to specify receive timeout, instead of previously
hardcoded K_FOREVER value. K_FOREVER is still the default, and can
be changes after tty initialization using tty_set_rx_timeout() call,
and timeout is stored as a property of tty. (Instead of e.g. being
a param of each receive call. Handling like that is required for
POSIX-like behavior of tty).
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Before going further for API refactoring in console subsys, makes
sense to split "tty" implementation from "console" implementation,
to make it clearer that "console" is just a "tty" instantiated on
a particular UART device.
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
