FreeCalypso > hg > fc-tourmaline
view src/cs/layer1/gtt_include/ctm/viterbi.h @ 303:f76436d19a7a default tip
!GPRS config: fix long-standing AT+COPS chance hanging bug
There has been a long-standing bug in FreeCalypso going back years:
sometimes in the AT command bring-up sequence of an ACI-only MS,
the AT+COPS command would produce only a power scan followed by
cessation of protocol stack activity (only L1 ADC traces), instead
of the expected network search sequence. This behaviour was seen
in different FC firmware versions going back to Citrine, and seemed
to follow some law of chance, not reliably repeatable.
This bug has been tracked down and found to be specific to !GPRS
configuration, stemming from our TCS2/TCS3 hybrid and reconstruction
of !GPRS support that was bitrotten in TCS3.2/LoCosto version.
ACI module psa_mms.c, needed only for !GPRS, was missing in the TCS3
version and had to be pulled from TCS2 - but as it turns out,
there is a new field in the MMR_REG_REQ primitive that needs to be
set correctly, and that psa_mms.c module is the place where this
initialization needed to be added.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Thu, 08 Jun 2023 08:23:37 +0000 |
parents | 4e78acac3d88 |
children |
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/* ******************************************************************************* * * COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH * * The program(s) may be used and/or copied only with the * written permission from Ericsson or in accordance * with the terms and conditions stipulated in the agreement or * contract under which the program(s) have been supplied. * ******************************************************************************* * * File : viterbi.h * Purpose : Header file for viterbi.c * Author : Francisco Javier Gil Gomez * * Revision history * * $Log: $ * ******************************************************************************* */ #ifndef viterbi_h #define viterbi_h "$Id: $" #include <stdio.h> #include <math.h> #include "conv_poly.h" /* definition of viterbi_t */ /***********************************************************************/ /* viterbi_init() */ /* ************** */ /* Initialization of the Viterbi decoder. */ /* */ /* output variables: */ /* *viterbi_state initialized state variable of the decoder */ /* */ /***********************************************************************/ void viterbi_init(viterbi_t* viterbi_state); /***********************************************************************/ /* viterbi_reinit() */ /* **************** */ /* Re-Initialization of the Viterbi decoder. This function should be */ /* used for re-setting a Viterbi decoder that has already been */ /* initialized. In contrast to viterbi_init(), this reinit function */ /* does not calculate the values of all members of viterbi_state that */ /* do not change during the execution of the Viterbi algorithm. */ /* */ /* output variables: */ /* *viterbi_state initialized state variable of the decoder */ /* */ /***********************************************************************/ void viterbi_reinit(viterbi_t* viterbi_state); /***********************************************************************/ /* viterbi_exec() */ /* ************** */ /* Execution of the Viterbi decoder */ /* */ /* input variables: */ /* inputword Vector with gross bits */ /* length_input Number of valid gross bits in vector inputword.*/ /* length_input must be an integer multiple of */ /* CHC_RATE */ /* */ /* output variables: */ /* out Vector with the decoded net bits. The net bits */ /* are either 0 or 1. */ /* *num_valid_out_bits Number of valid bits in vector out */ /* */ /* input/output variables: */ /* *viterbi_state State variable of the decoder */ /* */ /***********************************************************************/ void viterbi_exec(WORD16* inputword, WORD16 length_input, WORD16* out, WORD16* num_valid_out_bits, viterbi_t* viterbi_state); #endif