osmocom-bb

History

Vadim Yanitskiy 8ed6f42772 host/trxcon: forward Timing Advance value to transceiver The time at which the phone is allowed to transmit a burst of traffic within a timeslot must be adjusted accordingly to prevent collisions with adjacent users. Timing Advance (TA) is the variable controlling this adjustment. The TA value is normally between 0 and 63, with each step representing an advance of one bit period (approximately 3.69 microseconds). As trxcon doesn't perform actual burst transmission, this value needs to be forwarded to the transceiver, which will take care about the timings. Change-Id: Ia8c0848827ab2b4cd7cf1efe128b28d5c06ec84e		2017-12-05 01:16:44 +07:00
..
host	host/trxcon: forward Timing Advance value to transceiver	2017-12-05 01:16:44 +07:00
shared	vty: skip installing cmds now always installed by default	2017-11-09 01:14:49 +00:00
target	fake_trx: correct brief descriptions of files	2017-11-21 18:39:11 +07:00
target_dsp	Drop unused imports from the python utilities.	2012-10-01 03:21:53 +02:00
wireshark	wireshark: update SMSCB dissector patch	2011-01-26 20:21:07 +02:00
Makefile	host/trxcon: introduce a new 'trxcon' application	2017-11-19 17:35:07 +07:00
README.building	doc: Fix build readme with system-wide libosmocore details	2013-04-13 23:23:09 +02:00
README.development	documentation: fix some typos	2011-01-08 20:58:25 +01:00

README.development

= Contributing to OsmocomBB development =

Feel free to help us by extending the code.  Always make sure to
send back all your patches to the baseband-devel@lists.osmocom.org
mailing list - Free Software is all about sharing.

== Coding Style ==

Like all C language Osmocom projects, we use the Linux Kernel coding
style, you can find it in the Documentation/CodingStyle subdirectory
of any Linux Kernel source.

== More Information ==

Please consult the http://bb.osmocom.org/ web page / wiki.

If you have any technical questions regarding the code, don't hesitate
to ask the baseband-devel@lists.osmocom.org mailing list.

== subdirectories containing libraries and code ==

=== src/shared/libosmocore ===

This is a library of various utility routines, including linked lists,
message buffers, bit-vectors, memory allocator, signals, select loop
handling, timers - as well as some more specifically GSM related things
like a TLV parser, a Comp128V1 implementation and utility functions for
RSL (TS 08.58) and CC/MM/RR (TS 04.08).

libosmocore is maintained in git://git.osmocom.org/libosmocore.git, so

	DO NOT DIRECTLY COMMIT TO libosmocore IN THIS REPOSITORY!

We simply maintain a copy (synchronized by git-subtree) in this
repository for the ease of building and to make sure everyone is using
the proper/compatible version of libosmocore

Please note, whatever you add to libosmocore will need to build as a
Linux userspace program (using glibc) just as well as on the OsmocomBB
embedded target without OS.  So please refrain from using fancy
functions.


=== src/target/firmware ===

The firmware is what we build for the actual target (phone).  It was
written with some idea of modularity in mind, i.e. we have

 * Ti Calypso specific code in calypso/
 * Analog Baseband code in abb/
 * RF Mixer code in rf/
 * Layer1 code in layer1/
 * NOR flash handling in flash/
 * LCD display handling in display/
 * minimal C-Library code in lib/
 * communications utility routines in comm/
 * Board (phone model/family) specific code in board/
   * board/compal_e88 is the Motorola C115-C124 family
   * board/compal_e99 is the Motorola C155 family
 * Applications (each app builds one firmware image) in apps/


=== src/target_dsp/calypso ===

This is where we keep some (assembly) code that we wrote for
the DSP that is part of the Calypso DBB.

=== src/host/layer23 ===

The Layer2 (LAPDm / TS 04.06) and Layer3 (CC/MM/RR / TS 04.08)
implementations, as they are growing.