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Marten Christophe technosabby at gmail.comHello Sylvain , Apologies to disturb you people. I can see you all are too busy to give this osmocombb a final shape. good luck , i again say it was gra8 idea and gr8 work. Also thanks to clear up my mind doubts and misconceptions. ===== I just seeking list members help to give me advise only where to start in order to create a API to tune specific ARFCN and TS when DSP is configured in Speech processing mode, though i have check you source code and it is easy to understand from where to change the parameter to change ARFCN , even layer2/3 is able to do that, but whether DSP flags/resistors will be in TCH burst reception mode. i could understand so far that TPU will be involved somewhere, but only stucked at point where i'm suspecting if the present source code hacked and i change ARFCN and TS if DSP(Calypso ) will be in TCH/ speech coding mode or not ? whether Layer 2/3 application will change ARFCN but still keeps DPS in fictionally to process GSM burts to TCH/Speech and can change to Audio , what interrupts/flags/register used to fetch the burst from ADC in ABB , how does it sequenced and done BB processing, even TSM30Layer1 is not providing good idea can any one plz help me to suggest docks or links from where i can understand how DSP( process Immediate assignment command.) you know the most difficult part is GSM burst processing that include alot many thing no need to discuss right not even GSM BB processing i tried to write DSP block in matlab and Labviev, but was so difficult, there was the quarter bit issue which for delay insertion bcoz the guard period is contains 1/4 bit, and pedding of this is not possible in both of them. hence i searched the net and find this project .. PS just enligten my path so , that i Can devlop API to enter ARFCN TS and processes GSM (TCH) burts from a specific timeslot and process DBB to TCH/Speech. > also which all resistors need to manipulate to do manual configuration >resistors ? >>>> GSM are a little more modern than that ... they don't have tuning >>>>potentiometers ... it was typo error , uff register , I never meant this as potentiometers , and rita_pll is giving me good idea , also i seen your ./bcch_scan, and understand how the frequency getting change. in source code files. even i have done too many things with No---kia's 3210 RF section, even i have control the RF Base Band HAGAR_3, through Atmel micro controller and my PC . though Hagar reset generation was difficult part, again the problem arises to fetch data from the CONT a ADC in 3210. there is nothing inside the RF Base Band HAGAR_3, but Nationals LMX23xx series PLL. ohh but it,s getting something out of topic, sorry for that. Kind Regards, -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/baseband-devel/attachments/20101003/d2b84059/attachment.htm>