This is really good that you confirmed RF circuit functionality to some degree. I remember that you were talking about calibration procedures, could you remind me where in the available docs and codebase we have the calibration table values defined/described? Just trying not to duplicate the research effort :) Maybe I could use some alternative tools than CMU200.
On Sun, Apr 9, 2017 at 3:59 AM, Mychaela Falconia < [email protected]> wrote: > Hello again everyone, > > Just to assure myself that the RF tract on our FCDEV3B is fine in > hardware terms and that our only problem in this regard is the lack of > VCXO calibration, I have run OsmocomBB's full mobile app with their > layer1 running on our FCDEV3B, with a real SIM in the SIM socket on > our board, and it works: I was able to connect to my local GSM network > (Operator 310260), and send and receive SMS successfully. I have also > succeeded in dialing and connecting a voice call, although I couldn't > test the voice path as the off-board loudspeaker and microphone have > not been added yet. > > When it comes to audio, I designed the FCDEV3B with the intent of being > able to make test calls from the lab bench without needing anything > except the board itself, and for this purpose there is a loudspeaker > driver circuit and a microphone input circuit on the board. However, > the actual loudspeaker and microphone themselves aren't on the board, > instead there are headers meant for connecting them. At some point I > will need to acquire some loudspeaker and microphone parts, wire them > up to the headers and test these on-board audio circuits, but right > now there are higher priorities. > > For me the bring-up priorities going forward are as follows: > > 1. Get to the bottom of the flash boot mystery. We are not OsmocomBB > and our firmware is meant to run from flash, hence the flash boot > problem needs to be solved before I will feel comfortable taking on > other major challenges like calibration. In order to gather more > insight into this flash boot mystery, I need to connect JTAG to our > board, and I am currently missing the necessary jumper wires. I need > jumper wires like these: > > http://www.ebay.com/itm/262158878688?_trksid=p2057872. > m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT > > I already placed the order for the above back on Wednesday, but the > seller warns that they may take a month to arrive. In the next few > days I will see if I can procure similar jumper wires more locally. > > 2. Climb the calibration learning curve and get our FCDEV3B's VCXO > calibrated on the CMU200 so we can bring up the GSM radio using our > preferred firmware, rather than OsmocomBB. > > Hasta la Victoria, Siempre, > Mychaela aka The Mother > _______________________________________________ > Community mailing list > [email protected] > https://www.freecalypso.org/mailman/listinfo/community > _______________________________________________ Community mailing list [email protected] https://www.freecalypso.org/mailman/listinfo/community
