view src/g23m-gprs/sndcp/sndcp_pdas.c @ 629:3231dd9b38c1

armio.c: make GPIOs 8 & 13 outputs driving 1 on all "classic" targets Calypso GPIOs 8 & 13 are pinmuxed with MCUEN1 & MCUEN2, respectively, and on powerup these pins are MCUEN, i.e., outputs driving 1. TI's code for C-Sample and earlier turns them into GPIOs configured as outputs also driving 1 - so far, so good - but TI's code for BOARD 41 (which covers D-Sample, Leonardo and all real world Calypso devices derived from the latter) switches them from MCUEN to GPIOs, but then leaves them as inputs. Given that the hardware powerup state of these two pins is outputs driving 1, every Calypso board design MUST be compatible with such driving; typically these GPIO signals will be either unused and unconnected or connected as outputs driving some peripheral. Turning these pins into GPIO inputs will result in floating inputs on every reasonably-wired board, thus I am convinced that this configuration is nothing but a bug on the part of whoever wrote this code at TI. This floating input bug had already been fixed earlier for GTA modem and FCDEV3B targets; the present change makes the fix unconditional for all "classic" targets. The newly affected targets are D-Sample, Leonardo, Tango and GTM900.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 02 Jan 2020 05:38:26 +0000
parents 219afcfc6250
children
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/* 
+----------------------------------------------------------------------------- 
|  Project :  GPRS (8441)
|  Modul   :  sndcp_pdas.c
+----------------------------------------------------------------------------- 
|  Copyright 2002 Texas Instruments Berlin, AG 
|                 All rights reserved. 
| 
|                 This file is confidential and a trade secret of Texas 
|                 Instruments Berlin, AG 
|                 The receipt of or possession of this file does not convey 
|                 any rights to reproduce or disclose its contents or to 
|                 manufacture, use, or sell anything it may describe, in 
|                 whole, or in part, without the specific written consent of 
|                 Texas Instruments Berlin, AG. 
+----------------------------------------------------------------------------- 
|  Purpose :  This modul is part of the entity SNDCP and implements all 
|             functions to handles the incoming process internal signals as  
|             described in the SDL-documentation (PDA-statemachine)
+----------------------------------------------------------------------------- 
*/ 

#define ENTITY_SNDCP

/*==== INCLUDES =============================================================*/

#include "typedefs.h"    /* to get Condat data types */
#include "vsi.h"        /* to get a lot of macros */
#include "macdef.h"
#include "gsm.h"        /* to get a lot of macros */
#include "prim.h"       /* to get the definitions of used SAP and directions */

#include "dti.h"
#include "sndcp.h"        /* to get the global entity definitions */
#include "sndcp_f.h"       /* to get the functions to access the global arrays*/

/*==== CONST ================================================================*/

/*==== LOCAL VARS ===========================================================*/

/*==== PRIVATE FUNCTIONS ====================================================*/

/*==== PUBLIC FUNCTIONS =====================================================*/



/*
+------------------------------------------------------------------------------
| Function    : sig_sda_pda_getdata_req
+------------------------------------------------------------------------------
| Description : Handles the internal signal SIG_SDA_PDA_GETDATA_REQ
|
| Parameters  : the affected sapi.
|
+------------------------------------------------------------------------------
*/
GLOBAL void sig_sda_pda_getdata_req (UBYTE sapi) 
{ 
  UBYTE sapi_index = 0;

  TRACE_ISIG( "sig_sda_pda_getdata_req" );

   /*
    * set service instance according to sapi in primitive
    */
  sndcp_get_sapi_index(sapi, &sapi_index);
  sndcp_data->pda = & sndcp_data->pda_base[sapi_index];
 
  switch( GET_STATE( PDA ) )
  {
    case PDA_DEFAULT:
#ifdef SNDCP_TRACE_ALL
      TRACE_EVENT("trying to palloc/send LL_GETDATA_REQ");
#endif
      {
        PALLOC(ll_getdata_req, LL_GETDATA_REQ);

        ll_getdata_req->sapi = sapi;
        /*
         * TLLI is not evaluated by LLC.
         */
        PSEND(hCommLLC, ll_getdata_req);
      }
      break;
    default:
      TRACE_ERROR( "SIG_SDA_PDA_GETDATA_REQ unexpected" );
      break;
  }
} /* sig_sda_pda_getdata_req() */