Let the API user pass their own default config when allocating
a soft-UART. Make the default config publicly accessible.
Change-Id: I7e78d60c747a8805064d5e4bacfd47a30bc65cba
Related: OS#4396
The problem with a single function controlling both Rx and Tx is
that enabling/disabling one of the directions requires knowing
state of the other one. In other words, disabling Tx requires
knowing the state of Rx, which may be inconvenient.
Change-Id: Ieacc7e639304eeb14fdb298c7e14d772c136ca6e
Related: OS#4396
This patch brings a Work-in-Progress implementation of the software
UART (Universal Asynchronous Receiver/Transmitter) to libosmocore.
Not only it will be useful in the context of retro-networking, but
also it's needed for the MS-side CSD implementation (see OS#4396).
It should be noted that the definition of struct osmo_soft_uart
is intentionally kept private, since the API is not stable yet.
Currently, the following limitations apply:
* Only the receiver part is implemented, the transmitter is TBD.
* Parity checking is not implemented in the receiver part.
* Software flow control is not implemented.
These missing components will be addressed in subsequent patches.
Change-Id: I2ca95963fd5852ddb89bdd35b86b31489127fe84
Vadim Yanitskiy
Harald Welte