view src/cs/layer1/p_include/l1p_vare.h @ 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 945cf7f506b2
children
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/************* Revision Controle System Header *************
 *                  GSM Layer 1 software 
 * L1P_VAREX.H
 *
 *        Filename l1p_vare.h
 *  Copyright 2003 (C) Texas Instruments  
 *
 ************* Revision Controle System Header *************/

#ifdef L1P_ASYN_C

#if (LONG_JUMP == 3)
 #pragma DATA_SECTION(l1ps,".l1s_global")
 #pragma DATA_SECTION(l1pa_l1ps_com,".l1s_global")
 #pragma DATA_SECTION(l1ps_macs_com,".l1s_global")
 #pragma DATA_SECTION(l1ps_dsp_com,".l1s_global")
#endif

  // Global Packet L1A structure
  T_L1PA_GLOBAL    l1pa;

  // Global Packet L1S structure
  T_L1PS_GLOBAL    l1ps;

  // Common structure between L1A and L1S in packet mode
  T_L1PA_L1PS_COM  l1pa_l1ps_com;
 
  // Communication between L1S and MAC-S in packet mode
  T_L1PS_MACS_COM  l1ps_macs_com;

  // MCU / DSP interface
  T_L1PS_DSP_COM  l1ps_dsp_com;

#else
  extern T_L1PA_GLOBAL    l1pa;
  extern T_L1PS_GLOBAL    l1ps;
  extern T_L1PA_L1PS_COM  l1pa_l1ps_com;
  extern T_L1PS_DSP_COM   l1ps_dsp_com;
  extern T_L1PS_MACS_COM  l1ps_macs_com;

#endif