Hi all, why osmocombb need Ti Calypso/Iota/Rita GSM baseband chipset

246tnt at gmail.com 246tnt at gmail.com
Wed Sep 1 08:18:00 UTC 2010

On Sep 1, 2010 9:24am, John Wu <jwjohn0 at gmail.com> wrote:
> Hi all, from what i learned, osmocombb provide gsm protocol stack


> and dsp signal process code.

False. Osmocom-bb doesn't have demodulation or dsp code. It contains dsp  
drivers to control the calypso DSP stuff.

> So why need to use Ti Calypso/Iota/Rita. Is it possible to run on other  
> common arm7+dsp chipset?

See above. All the DSP code, as well as all the dirty details about timing  
/ rf path configuration / dsp stuff is completely calypso specific.
If you wanted to support another one, it's possible. But you'd have to  
write the equivalent of all the "target" code for your target and it would  
talk to the l23 stuff using our l1ctl protocol.

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