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OsmocomBB Firmware » History » Revision 5

Revision 4 (nion, 02/19/2016 10:48 PM) → Revision 5/17 (nion, 02/19/2016 10:48 PM)

 
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 = Background = 
 The OsmocomBB source code comes with several applications for various purposes. 
 Those applications can be devided into two separate classes, applications: 
  * running on the baseband chip of the phone 
  * running on a PC, communicating with the baseband firmware over serial 

 Applications running on the PC can further be partitioned into: 
  * Firmware management software (loading, flashing, ...) 
  * GSM Layer 2/3 applications 

 The following will provide you a rough overview of the most commonly used software pieces. 



 = Baseband firmware = 

 Binary location: src/target/firmware/board/*/*.bin 
 Source locations: src/target/firmware/, particularly apps and layer1 

 == layer1 == 
 [wiki:layer1.bin] is a 

 A simple GSM layer 1 proxy, communicating over the [wiki:L1A_L23_Interface]. 

 This allows you to run a full-blown GSM implementation on your host machine, communicating through the phones radio interface. 

 == loader == 
 [wiki:loader.bin] is our flash loader, dumper and second stage bootloader 

 http://bb.osmocom.org/trac/wiki/PreliminaryRequirements 

 == l1test == 

 Layer 1 development application. 

 This application does what layer1 does, but automatically tunes to the strongest ARFCN it can find. 

 It can be used for stand-alone-testing of the phones radio. 

 == loader == 

 Our [wiki:Bootloader], available in various build configurations. 

 == compal_dsp_dump == 

 Application for dumping the contents of the DSP in the Calypso chip. 

 == compal_dumper == 

 The old compal device dumper. Use [wiki:Bootloader] instead once it is available. 

 == hello_world == 

 The initial obligatory "Hello, world!" application. 

 Currently, this does more than say hello. Intended as a template for new applications. 

 == rssi == 

 The [blog:rssi-firmware] can be used to monitor the received signal indication (RSSI) of ARFCNs or the entire spectrum. 



 = Firmware management software = 
 Location (source and binary): src/host/osmocon 

 == osmocon == 
 [wiki:osmocon] is a console tool for interfacing our baseband firmware on the phone with applications on the host PC. 

 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. 

 == osmoload == 
 [wiki:osmoload] is used to write, dump and examine flash memory of supported phones. 

 You will need this program for example if you intent [wiki:flashing] an application to the phone (the software is usually loaded into RAM). 

 == calypso_pll ==  
 The [wiki:calypso_pll] tool can be used to calculate Calypso DPLL multiplier+divider. 

 == rita_pll == 
 The [wiki:rita_pll] tool can be used to calculate the Rita PLL multiplier/divider. 


 = GSM Layer 2/3 applications =  
 Location (source and binary): src/host/layer23/* 

 Layer 3 applications implement various functionality based on GSM Layer 3 in combination with Layer 2 (LAPDm). 

 == mobile == 
 [wiki:mobile] is the most sophisticated OsmocomBB application so far. 

 It implements most of the behavior of a regular GSM telephone, but is extended in many ways with features interesting to researchers. 

 == cell_log == 
 The cell_log application scans through valid available carrier frequencies, attempts to sync to them and dumps information gathered from the BCCH. 

 It is usually used to create a list of used ARFCNs and information such as their reception levels, MNC, MCC, and System Information. 

 == ccch_scan == 
 The ccch_scan application can sync to a carrier ARFCN and logs power measurement and CCCH information (paging requests and Immediate Assignments). 

 == bcch_scan == 
 bcch_scan is basically a predecessor of cell_log and logs information as observed on the BCCH (System Information). 

 == cbch_sniff == 
 cbch_sniff dumps cell broadcast channel information such as, e.g., GPS location of the cell.
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