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annotate gsm-fw/ccd/README @ 923:10b4bed10192

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gsm-fw/L1: fix for the DSP patch corruption bug The L1 code we got from the LoCosto fw contains a feature for DSP CPU load measurement. This feature is a LoCosto-ism, i.e., not applicable to earlier DBB chips (Calypso) with their respective earlier DSP ROMs. Most of the code dealing with that feature is conditionalized as #if (DSP >= 38), but one spot was missed, and the MCU code was writing into an API word dealing with this feature. In TCS211 this DSP API word happens to be used by the DSP code patch, hence that write was corrupting the patched DSP code.
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Mon, 19 Oct 2015 17:13:56 +0000
parents c36fe9d1da7e
children
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042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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1 CCD (Condat Coder and Decoder) is yet another component needed in order to
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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2 produce a functional GSM/GPRS MS (mobile station) firmware image based on the
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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3 TI/Condat architecture. We got the C source for this component from the
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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4 LoCosto find.
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
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6 CCD code that went into TI's firmware builds (as opposed to TI/Condat's
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
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7 Windows-based tools etc) has two subdivisions:
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
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042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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9 1. The main CCD library - ccd_na7_db.lib in the case of our Leonardo reference
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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10 firmware. The C modules compiled into this library must be very independent,
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
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11 as it's one of the "frozen" GPF libs - it appears that GPF was maintained by
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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12 a separate group inside TI, and the builders of actual GSM/GPRS firmwares
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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13 used that group's GPF (and CCD) binary lib deliverables as untouched blobs.
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
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042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
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15 2. The ccddata component is meant to be compiled as part of the product firmware
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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16 build process, in both TCS211 and LoCosto versions. Our Leonardo reference
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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17 version has it in a binary lib too, but it's one of those "unprivileged
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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18 customer" libs, and one can see from the makefiles that it was meant to be
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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19 compiled the same way as L1 and L23 etc. The LoCosto version came with the
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
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20 full source for all of CCD, but the build system is set up to only compile
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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21 ccddata, whereas the rest of CCD is used in the form of an imported GPF
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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22 binary lib, just like GPF proper, just like in TCS211.
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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24 It appears, however, that the C source for both above-listed parts of CCD has
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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25 always been maintained in a single directory, and that is how it appears in the
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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26 LoCosto find.
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
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27
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c36fe9d1da7e gsm-fw/ccd/README: added paragraph explaining how ccddata depends on cdginc
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 649
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28 The true reason for the subdivision became apparent when we went through the
c36fe9d1da7e gsm-fw/ccd/README: added paragraph explaining how ccddata depends on cdginc
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 649
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29 process of integrating CCD into FreeCalypso. The C modules that comprise
c36fe9d1da7e gsm-fw/ccd/README: added paragraph explaining how ccddata depends on cdginc
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 649
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30 ccddata include cdginc headers (see ../cdg/README to learn what a nightmare
c36fe9d1da7e gsm-fw/ccd/README: added paragraph explaining how ccddata depends on cdginc
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 649
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31 that is), require these headers to be present in order to pass compilation, and
c36fe9d1da7e gsm-fw/ccd/README: added paragraph explaining how ccddata depends on cdginc
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 649
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32 depend on any changes in these headers, whereas the "base" part of CCD (the one
c36fe9d1da7e gsm-fw/ccd/README: added paragraph explaining how ccddata depends on cdginc
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 649
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33 that was maintained as a GPF stable lib inside TI) has no dependency on cdginc.
c36fe9d1da7e gsm-fw/ccd/README: added paragraph explaining how ccddata depends on cdginc
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 649
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34
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042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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35 For our use in FreeCalypso we shall compile all of CCD (both subdivisions) into
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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36 a single library in this directory - in this project we always compile
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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37 everything from source anyway, so we may as well simplify the build process in
042735181793 gsm-fw/ccd/README: description of how we are going to tackle this component
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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38 this regard.