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view src/cs/services/tty/tty_task.c @ 629:3231dd9b38c1

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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 945cf7f506b2
children
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/**
 * @file   tty_task.c
 *
 * Coding of the main TTY function : tty_core
 * This function loop in the process message function for waiting messages.
 *
 * @author	Frederic Turgis (f-turgis@ti.com) & Gerard Cauvy (g-cauvy@ti.com)
 * @version 0.1
 */

/*
 * History:
 *
 * 	Date       	Modification
 *  ------------------------------------
 *  01/27/2003	Create
 *
 * (C) Copyright 2003 by Texas Instruments Incorporated, All Rights Reserved
 */

#ifndef _WINDOWS
  #include "config/l1sw.cfg"
#endif

#include "tty/tty_env.h"
#include "tty/tty_i.h"

#include "rv/rv_general.h"
#include "rvf/rvf_api.h"
#include "rvm/rvm_use_id_list.h"

#if (TRACE_TYPE == 1) || (TRACE_TYPE == 4)
  #ifndef _WINDOWS
    #include "config/sys.cfg"
    #include "config/chipset.cfg"
  #endif
  #include "l1_types.h"
  #include "l1_confg.h"
  #include "l1_trace.h"
#endif

#if (L1_GTT == 1)
  /* External prototype. */
  extern void l1gtt_initialize(void);
  extern void l1gtt_exit(void);
  extern void l1gtt_main_processing(void);
  extern void l1gtt_init_trace(void);
#else
  /* Dummy functions */
  void l1gtt_initialize(void) {}
  void l1gtt_exit(void) {}
  void l1gtt_main_processing(void) {}
  void l1gtt_init_trace(void) {}
#endif


/**
 * @name Functions implementation
 *
 */
/*@{*/

/**
 * function: tty_core
 */
T_RV_RET tty_core(void)
{
  BOOLEAN error_occured = FALSE;
  T_RV_HDR* msg_p;
  UINT16 received_event;

  TTY_SEND_TRACE("TTY TASK Started", RV_TRACE_LEVEL_DEBUG_HIGH );

  l1gtt_init_trace();

  /* loop to process messages */
  while (error_occured == FALSE)
  {
    /* Wait for the necessary events. */
    received_event = rvf_wait ( 0xffff,0);

    if (received_event & TTY_INIT_EVENT_MASK)
    {
      l1gtt_initialize();
    }
    else if (received_event & TTY_EXIT_EVENT_MASK)
    {
      l1gtt_exit();
    }
    else if (received_event & TTY_DATA_EVENT_MASK)
    {
      l1gtt_main_processing();
    }
  }

  return RV_OK;
}