Hello Sylvain,
On Mon, 4 Oct 2010 22:13:13 +0200, "Sylvain Munaut" 246tnt@gmail.com wrote:
And Dieter's code probably worked on some internal version of the code that were never even commited on the public tree and he may not even have any more ...
Yes, exactly, this code was never commited. Its main purpose was to get the TCH up and running.
BTW, I still do not fully understand what Marten wants to do:
- send a TCH ? If yes, with which device, a BTS or a GSM testset like I did with the HP8922 ? If it is the HP8922, this sending of audio data over one the external connectors of the testset also works with a full MOC or MTC, so no need to hack anything. Just use Sylvain's TCH testing branch and perform a MOC or MTC. This of course works with any GSM phone, so no need to use OsmocomBB at all...
- something else I have not understand yet which requires just TCH receiving and no signalling ? Or recieve the same TCH on multiple phones ?
Best regards, Dieter
BTW, I still do not fully understand what Marten wants to do:
I think he wants to turn the GSM into a simple two way radio / talkie-walkie, making two phones talk directly together on a TCH. (with only 2 devices)
If both are pre-aligned on the same cell and if you appropriately set the uplink/downlink frequencies, and make sure there are tracking for frequency offset/toa it could work. But it's way more complex than just 'opening' a TCH with L1CTL, and without a good undertanding of how to setup all that ...
I had thought of this some time ago and its among my 'list of fun thing to try', but I didn't quite get to it yet ...
Cheers,
Sylvain
baseband-devel@lists.osmocom.org
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Dieter Spaar -
Sylvain Munaut