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+== OsmoTRX hardware device support
+OsmoTRX consists of a _common_ part that applies to all TRX devices as well as
+_hardware-specific_ parts for each TRX device. The hardware-specific parts are
+usually provided by vendor-specific or device-specific libraries that are then
+handled by some OsmoTRX glue code presenting a unified interface towards the
+rest of the code by means of a _RadioDevice_ class.
+The common part includes the core TRX architecture as well as code for
+implementing the external interfaces such as the TRX Manager UDP socket,
+control, and VTY interfaces.
+The hardware-specific parts include support for driving one particular
+implementation of a radio modem. Such a physical layer
+implementation can come in many forms. Sometimes it runs on a general
+purpose CPU, sometimes on a dedicated ARM core, a dedicated DSP, a
+combination of DSP and FPGA.
+Joining the common part with each of the available backends results in a
+different binary with different suffix for each backend. For instance, when
+OsmoTRX is built with UHD backend, an _osmo-trx-uhd_ binary is generated; when
+OsmoTRX is built with LimeSuite backend, an _osmo-trx-lms_ binary is generated.
+Build of different backend can be enabled and disabled by means of configure
+flags, which can be found in each subsection relative to each backend below.