FreeCalypso > hg > freecalypso-tools
view doc/RF-cal/Architecture @ 220:5c78f132547c
rvinterf/include/exitcodes.h: added ERROR_RFTEST for use by autocal tools
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 20 May 2017 19:57:49 +0000 |
parents | bab88077deba |
children |
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The RF calibration process fundamentally consists of 3 parts: 1: The FreeCalypso GSM MS device under test (DUT) to be calibrated; 2: An RF test station to which the DUT is connected via an RF coax cable, performing the RF signal analyzer and signal generator functions required for the calibration procedures; 3: A program that communicates with both the DUT and the RF test station and orchestrates all of the signal generation, measurement and computation steps to arrive at the final calibration results to be stored in the flash file system of the DUT. The steps are too numerous, tedious and repetitive to be performed manually, hence automation is required in order to make the process practical. The goal of the FreeCalypso RF calibration subproject is to produce a set of tools for performing part 3 of the above breakdown. The current vision is that our automated calibration software will be broken down into two interfacing components: 1: There will be a Test System Interface Daemon (TSID) that encapsulates the magic specific to a particular brand of RF test station, e.g., R&S CMU200. The TSID will only talk to the CMU200 or other RF test station, but not to the Calypso DUT, and the intent is that the TSID only needs to be started once at the beginning of a calibration work shift and then stay running as a hundred or more FreeCalypso GSM devices may be calibrated on the production line. The TSID will present a local socket interface (can be changed to TCP/IP if operation over a network is required) to which the other component below will connect as a client. 2: There will be a set of 3 programs (fc-rfcal-vcxo, fc-rfcal-rxband and fc-rfcal-txband) that perform the 3 required calibration groups for each individual FreeCalypso device unit on the production line. The production automation script will need to run fc-rfcal-vcxo first, then fc-rfcal-rxband for each of the hardware-supported bands (e.g., 900, 1800 and 1900 on FCDEV3B-900), then fc-rfcal-txband for each of the same bands. Each of these programs will talk both to the DUT (via rvinterf) and to the RF test system (via the TSID), i.e., will need to connect to an already-running rvinterf process and to an already-running TSID via local sockets. The programs in the second group above will contain no knowledge specific to R&S CMU200 or any other particular brand of RF test station, instead this knowledge is to be encapsulated in the TSID. The interface between the TSID and its clients will be of a command-response nature, and will be defined from the perspective of the needs of the FreeCalypso calibration process, rather than from the perspective of the capabilities of the CMU200 - in other words, the calibration automation program will command the TSID to the effect of "I need this", and it will be the responsibility of the TSID to figure out how to perform the required measurement or signal generation on the given type of test equipment. See the Test-system-interface document for the details of the TSID socket interface.