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OsmocomBB Firmware » History » Version 5

nion, 02/19/2016 10:48 PM

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[[PageOutline]]
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= Background =
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The OsmocomBB source code comes with several applications for various purposes.
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Those applications can be devided into two separate classes, applications:
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 * running on the baseband chip of the phone
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 * running on a PC, communicating with the baseband firmware over serial
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Applications running on the PC can further be partitioned into:
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 * Firmware management software (loading, flashing, ...)
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 * GSM Layer 2/3 applications
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The following will provide you a rough overview of the most commonly used software pieces.
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= Baseband firmware =
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Binary location: src/target/firmware/board/*/*.bin
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Source locations: src/target/firmware/, particularly apps and layer1
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== layer1 ==
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[wiki:layer1.bin] is a simple GSM layer 1 proxy, communicating over the [wiki:L1A_L23_Interface].
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This allows you to run a full-blown GSM implementation on your host machine, communicating through the phones radio interface.
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== loader ==
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[wiki:loader.bin] is our flash loader, dumper and second stage bootloader
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http://bb.osmocom.org/trac/wiki/PreliminaryRequirements
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== l1test ==
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Layer 1 development application.
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This application does what layer1 does, but automatically tunes to the strongest ARFCN it can find.
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It can be used for stand-alone-testing of the phones radio.
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== loader ==
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Our [wiki:Bootloader], available in various build configurations.
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== compal_dsp_dump ==
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Application for dumping the contents of the DSP in the Calypso chip.
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== compal_dumper ==
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The old compal device dumper. Use [wiki:Bootloader] instead once it is available.
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== hello_world ==
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The initial obligatory "Hello, world!" application.
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Currently, this does more than say hello. Intended as a template for new applications.
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== rssi ==
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The [blog:rssi-firmware] can be used to monitor the received signal indication (RSSI) of ARFCNs or the entire spectrum.
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= Firmware management software =
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Location (source and binary): src/host/osmocon
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== osmocon ==
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[wiki:osmocon] is a console tool for interfacing our baseband firmware on the phone with applications on the host PC.
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It is responsible for downloading a baseband firmware or bootloader into the phone and relay communication between Layer 3 applications and baseband firmwares over serial.
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== osmoload ==
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[wiki:osmoload] is used to write, dump and examine flash memory of supported phones.
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You will need this program for example if you intent [wiki:flashing] an application to the phone (the software is usually loaded into RAM).
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== calypso_pll == 
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The [wiki:calypso_pll] tool can be used to calculate Calypso DPLL multiplier+divider.
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== rita_pll ==
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The [wiki:rita_pll] tool can be used to calculate the Rita PLL multiplier/divider.
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= GSM Layer 2/3 applications = 
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Location (source and binary): src/host/layer23/*
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Layer 3 applications implement various functionality based on GSM Layer 3 in combination with Layer 2 (LAPDm).
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== mobile ==
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[wiki:mobile] is the most sophisticated OsmocomBB application so far.
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It implements most of the behavior of a regular GSM telephone, but is extended in many ways with features interesting to researchers.
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== cell_log ==
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The cell_log application scans through valid available carrier frequencies, attempts to sync to them and dumps information gathered from the BCCH.
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It is usually used to create a list of used ARFCNs and information such as their reception levels, MNC, MCC, and System Information.
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== ccch_scan ==
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The ccch_scan application can sync to a carrier ARFCN and logs power measurement and CCCH information (paging requests and Immediate Assignments).
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== bcch_scan ==
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bcch_scan is basically a predecessor of cell_log and logs information as observed on the BCCH (System Information).
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== cbch_sniff ==
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cbch_sniff dumps cell broadcast channel information such as, e.g., GPS location of the cell.
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