baseband-devel

baseband-devel@lists.osmocom.org

1981 discussions

How to add gdb info when build mobile and trx? Thank you!

by hellowangfang＠gmail.com

I used mobile, trx,grgsm,sdr to connect to openBTS, still failed. I want to use gdb to trace the internal info, how to enable gdb info when build them? Thank.

1 year, 3 months

Excel in NURS FPX 4010 Assessments with Our Expert Online Tutoring

by williammores96＠gmail.com

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1 year, 3 months

pycrate repo update

by benoit michau

Dear osmocom developpers, This is just to let you know that the Python library pycrate has a new home : https://github.com/pycrate-org/pycrate. The packages on Pypi are now feeded from there. This library can be used in many cases dealing with mobile signalling. I wanted to let you know, as even if I am not aware of any osmocom projects depending on it, some of you may use the library from time to time, or could have local applications depending on it. Best Regards Benoit

1 year, 4 months

Please Read and Support Compilation error in OSMOCOM BB

by Neeraj Chaudhary

Hello Team, I hope you are well and good . While I am doing the compilation of osmocom BB , There are errors as following , I committed the "Hello world" in the Makefile then there was another error and it kept coming one after another after I did the commit . Please note I have installed all the pre-requisites , GnuARM ToolChain and Libsomocomcore as directed in document . Also I have tried on both Ubuntu 20 and 22 but still the error keep coming . Please let me know for any know solutions for the same and also let me know if you need some more information from myside . Advance thanks for your support and all this good work . comm/timer.c: In function ‘timer_irq’: comm/timer.c:184: warning: unused parameter ‘irq’ AR comm/libcomm.a CC tiffs/globals.o CC tiffs/init.o CC tiffs/readfile.o AR tiffs/libtiffs.a LD board/compal_e88/hello_world.compalram.elf arm-elf-gcc: board/compal_e88/hello_world.compalram.map: No such file or directory make[1]: *** [Makefile.inc:139: board/compal_e88/hello_world.compalram.elf] Error 1 make[1]: Leaving directory '/home/lab3/osmocom-bb/src/target/firmware' make: *** [Makefile:100: firmware] Error 2 BR// Niraj Kumar

1 year, 4 months

Please Read and Support Compilation error in OSMOCOM BB

by Neeraj Chaudhary

Hello Team, I hope you are well and good . While I am doing the compilation of osmocom BB , There are errors as following , I committed the "Hello world" in the Makefile then there was another error and it kept coming one after another after I did the commit . Please note I have installed all the prerequisites , GnuARM ToolChain and Libsomocomcore as directed in document . Also I have tried on both Ubuntu 20 and 22 but still the error keep coming . Please let me know for any know solutions for the same and also let me know if you need some more information from myside . Advance thanks for your support and all this good work . comm/timer.c: In function ‘timer_irq’: comm/timer.c:184: warning: unused parameter ‘irq’ AR comm/libcomm.a CC tiffs/globals.o CC tiffs/init.o CC tiffs/readfile.o AR tiffs/libtiffs.a LD board/compal_e88/hello_world.compalram.elf arm-elf-gcc: board/compal_e88/hello_world.compalram.map: No such file or directory make[1]: *** [Makefile.inc:139: board/compal_e88/hello_world.compalram.elf] Error 1 make[1]: Leaving directory '/home/lab3/osmocom-bb/src/target/firmware' make: *** [Makefile:100: firmware] Error 2 BR// Niraj Kumar

1 year, 4 months

Does anyone from the community want the airprobe.org domain?

by Harald Welte

Hi all, I was approached by the person currently holding the [unused] airprobe.org domain name. I guess it was at some point registered and intended to be used for the project (back in the pre-osmocom days). As far as I know it was never actually used for that. So the question is now if anyone wants to get that domain transferred in order to do something useful with it, or whether the current registrant should simply let it expire? Regards, Harald -- - Harald Welte <laforge(a)osmocom.org> https://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

1 year, 5 months

OsmoDevCall on Nov 15, 2023: Calypso history: From TI to FreeCalypso to USA PSTN

by Harald Welte

Dear Osmocom community, we're happy to announce the next incarnation of OsmoDevCall. when: (today) November 15, 2023 at 20:00 CET where: https://osmocom.org/OsmoDevCall (Big Blue Button) This time, @falconia will be presenting on Calypso chipset history and development boards, from TI to FreeCalypso This meeting will have the following schedule: 20:00 meet + greet 20:10 topic as outlined above 21:00 unstructured supplementary social event [*] Attendance is free of charge and open to anyone with an interest in Osmocom or open source cellular technologies. More information about OsmoDevCall, including the schedule for further upcoming events can be found at https://osmocom.org/projects/osmo-dev-con/wiki/OsmoDevCall Looking forward to meeting you soon! Best regards, Harald [*] this is how we started to call the "unstructured" part of osmocom developer conferences in the past, basically where anyone can talk about anything, no formal schedule or structure. -- - Harald Welte <laforge(a)osmocom.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

1 year, 7 months

Powering GSM MS from USB

by Mychaela Falconia

Hello fellow GSM MS tinkerers, Question: is there anyone on either ML who has any experience with powering a GSM MS from USB, or had at least thought about this problem? We all know the fundamental problem: during Tx bursts the PA in a GSM MS can suck as much as 2 A, but the current budget of a classic USB port is only 500 mA. However, that 2 A current draw has a duty cycle of 1/8 of a TDMA frame, and the total energy transfer with 1/8 duty cycle bursts of 2 A (at a given voltage) is equivalent to 250 mA continuous draw - and the latter number is well within the range of what a PC/laptop USB host port can supply. Context: I am looking into the possibility of building a new GSM MS board that would be just a little better than the one in OS#4030. The goal is to produce a low-cost modem-only (no UI as in LCD etc, host computer required for control) GSM MS using a pre-existing packaged Calypso module (FC Tango, similar to GTM900, but a little better) with a built-in USB adapter for the two Calypso UARTs - very similar goals to OS#4030, but design it in such a way that will be suitable for both firmware tastes, rather than OBB-only. My initial thought was to require a separate non-USB supply for the GSM side of this board, leaving USB power only for the FT2232H block. This approach is not a problem from the perspective of cost - I already have a large stock of 3.6V 2.2A power supply bricks that were specifically made for powering FreeCalypso dev boards, hence the least-effort and least-cost approach would be to simply include one of these AC-to-3.6V adapters with each board and be done with it. But use convenience does suffer with this approach: in addition to connecting the GSM MS board to her PC/laptop with a USB cable, the user would also have to connect the separate 3.6V power supply (and have a spare AC power outlet for it) in order to bring the GSM MS to life. The whole arrangement would be much more convenient for the user if she only needs to connect USB from her PC/laptop to the board and that's it - have this USB supply power to the GSM MS and carry the two ttyUSB channels for Calypso UARTs. But how to design it in hw so that it will work correctly is the question. My first thought in this direction is to implement a step-down regulator (ideally a switcher, but linear may be OK too) from 5V down to 3.5V as the first order of business, and then somehow deal with 2 A current spikes on the 3.5V rail. Why 3.5V? Every power consumer inside a Calypso+Iota+Rita module either uses actual LDO linear regulators (Iota and Rita) or behaves (power-wise) in the manner of a linear regulator (RF PA), thus one could actually feed 5V directly to the VBAT input of such module - but this design would shorten the longevity of components through higher heat dissipation inside Iota, Rita and PA chips. If we stick a linear regulator down to 3.5V somewhere between USB 5V power input and VBAT rail to the Calypso module, the overall current and power consumption profile stays exactly the same, but a big chunk of heat dissipation moves from delicate RF components to that external 3.5V regulator, which can have a proper heat sink. (The specific choice of 3.5V number is rather arbitrary - the idea is to make it as low as possible while staying within safe margins of "good battery" voltage.) And if we make that 5V to 3.5V regulator a switcher instead of linear, we'll have a little less current drawn from the USB host for the same current into VBAT GSM domain. But what would be the right way to support 2 A current spikes during GSM Tx bursts? I reason that a large capacitor will need to be placed on the output of the 3.5V step-down regulator, one that will store enough energy to feed the PA during that hungry burst - any thoughts as to which type and size of capacitor would be most appropriate here? And the most important question, for people with more EE experience than me, and/or people who have already considered this problem: is this capacitor solution expected to work, or is the problem intractable in the sense that a USB-powered GSM MS, with the USB host limiting to 500 mA, will never be able to produce proper GSM Tx bursts at max power without tripping overcurrent shutdown on the USB host port? I would greatly appreciate some feedback on these ideas. M~ P.S. Suggestions to move to USB Type C and USB-PD won't be helpful - the dev board MUST be usable with traditional PC/laptop USB host ports that max out at 500 mA and never switch from 5V to any other voltage.

1 year, 7 months

Re: baseband-devel Digest, Vol 82, Issue 1

by Alen Jungen

Hi! I am finishing an app in c++ for A5/3 rainbow tables on cuda. Is somebody interested in sharing nvidia GPU for generating or costs for cloud? Regards! пон, 23. окт 2023. у 14:04 <baseband-devel-request(a)lists.osmocom.org> је написао/ла: > Send baseband-devel mailing list submissions to > baseband-devel(a)lists.osmocom.org > > To subscribe or unsubscribe via email, send a message with subject or > body 'help' to > baseband-devel-request(a)lists.osmocom.org > > You can reach the person managing the list at > baseband-devel-owner(a)lists.osmocom.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of baseband-devel digest..."Today's Topics: > > 1. Powering GSM MS from USB (Mychaela Falconia) > > > > ---------- Forwarded message ---------- > From: Mychaela Falconia <falcon(a)freecalypso.org> > To: baseband-devel(a)lists.osmocom.org, community(a)freecalypso.org > Cc: > Bcc: > Date: Sun, 22 Oct 2023 15:40:49 -0800 > Subject: Powering GSM MS from USB > Hello fellow GSM MS tinkerers, > > Question: is there anyone on either ML who has any experience with > powering a GSM MS from USB, or had at least thought about this problem? > > We all know the fundamental problem: during Tx bursts the PA in a GSM > MS can suck as much as 2 A, but the current budget of a classic USB > port is only 500 mA. However, that 2 A current draw has a duty cycle > of 1/8 of a TDMA frame, and the total energy transfer with 1/8 duty > cycle bursts of 2 A (at a given voltage) is equivalent to 250 mA > continuous draw - and the latter number is well within the range of > what a PC/laptop USB host port can supply. > > Context: I am looking into the possibility of building a new GSM MS > board that would be just a little better than the one in OS#4030. The > goal is to produce a low-cost modem-only (no UI as in LCD etc, host > computer required for control) GSM MS using a pre-existing packaged > Calypso module (FC Tango, similar to GTM900, but a little better) with > a built-in USB adapter for the two Calypso UARTs - very similar goals > to OS#4030, but design it in such a way that will be suitable for both > firmware tastes, rather than OBB-only. > > My initial thought was to require a separate non-USB supply for the > GSM side of this board, leaving USB power only for the FT2232H block. > This approach is not a problem from the perspective of cost - I > already have a large stock of 3.6V 2.2A power supply bricks that were > specifically made for powering FreeCalypso dev boards, hence the > least-effort and least-cost approach would be to simply include one of > these AC-to-3.6V adapters with each board and be done with it. But > use convenience does suffer with this approach: in addition to > connecting the GSM MS board to her PC/laptop with a USB cable, the > user would also have to connect the separate 3.6V power supply (and > have a spare AC power outlet for it) in order to bring the GSM MS to > life. > > The whole arrangement would be much more convenient for the user if > she only needs to connect USB from her PC/laptop to the board and > that's it - have this USB supply power to the GSM MS and carry the two > ttyUSB channels for Calypso UARTs. But how to design it in hw so that > it will work correctly is the question. > > My first thought in this direction is to implement a step-down > regulator (ideally a switcher, but linear may be OK too) from 5V down > to 3.5V as the first order of business, and then somehow deal with 2 A > current spikes on the 3.5V rail. Why 3.5V? Every power consumer > inside a Calypso+Iota+Rita module either uses actual LDO linear > regulators (Iota and Rita) or behaves (power-wise) in the manner of a > linear regulator (RF PA), thus one could actually feed 5V directly to > the VBAT input of such module - but this design would shorten the > longevity of components through higher heat dissipation inside Iota, > Rita and PA chips. If we stick a linear regulator down to 3.5V > somewhere between USB 5V power input and VBAT rail to the Calypso > module, the overall current and power consumption profile stays > exactly the same, but a big chunk of heat dissipation moves from > delicate RF components to that external 3.5V regulator, which can have > a proper heat sink. (The specific choice of 3.5V number is rather > arbitrary - the idea is to make it as low as possible while staying > within safe margins of "good battery" voltage.) And if we make that > 5V to 3.5V regulator a switcher instead of linear, we'll have a little > less current drawn from the USB host for the same current into VBAT > GSM domain. > > But what would be the right way to support 2 A current spikes during > GSM Tx bursts? I reason that a large capacitor will need to be placed > on the output of the 3.5V step-down regulator, one that will store > enough energy to feed the PA during that hungry burst - any thoughts > as to which type and size of capacitor would be most appropriate here? > And the most important question, for people with more EE experience > than me, and/or people who have already considered this problem: is > this capacitor solution expected to work, or is the problem intractable > in the sense that a USB-powered GSM MS, with the USB host limiting to > 500 mA, will never be able to produce proper GSM Tx bursts at max power > without tripping overcurrent shutdown on the USB host port? > > I would greatly appreciate some feedback on these ideas. > > M~ > > P.S. Suggestions to move to USB Type C and USB-PD won't be helpful - > the dev board MUST be usable with traditional PC/laptop USB host ports > that max out at 500 mA and never switch from 5V to any other voltage. > _______________________________________________ > baseband-devel mailing list -- baseband-devel(a)lists.osmocom.org > To unsubscribe send an email to baseband-devel-leave(a)lists.osmocom.org >

1 year, 8 months

Open Source Software Stack for 3G

by 200207094＠kocaeli.edu.tr

For my thesis research, I am looking for a 3G protocol stack that enables users can call each other and make data connections. If I can, I need to establish 7-8Mbps for downlink in lab environment. Is it even possible, I don’t know yet? Besides, I am sure you know if I can make a call connection between 2G and 3G users via Osmocom. This is my another possible research subject. Thank you very much in advance for your answers. Best Regards,

1 year, 9 months

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