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view src/gpf2/tst/idle.h @ 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 cd37d228dae0
children
line wrap: on
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/*
+------------------------------------------------------------------------------
|  File:       idle.h
+------------------------------------------------------------------------------
|                 Copyright Texas Instruments 2002
|                 All rights reserved.
|
+------------------------------------------------------------------------------
| Purpose:     Definitions for the IDLE entity.
| $Identity:$
+------------------------------------------------------------------------------
*/

#ifndef IDLE_H
#define IDLE_H

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

/*==== CONSTS ================================================================*/

#ifdef VSI_CALLER
 #undef VSI_CALLER
 #define VSI_CALLER        idle_handle,
 #define VSI_CALLER_SINGLE idle_handle
#endif

#define hCommTST          idle_hCommTST   /* Communication handle to TST       */

#define IDLE_REQ   0x00000010
#define IDLE_CNF   0x00010010


#ifndef __T_IDLE_CNF__
#define __T_IDLE_CNF__
typedef struct
{
  U8                        dummy;                       /*<  0:  1>                              */
} T_IDLE_CNF;
#endif

#ifndef __T_IDLE_REQ__
#define __T_IDLE_REQ__
typedef struct
{
  U8                        dummy;                       /*<  0:  1>                              */
} T_IDLE_REQ;
#endif

/*==== TYPES =================================================================*/

/*==== EXPORTS ===============================================================*/

#ifdef IDLE_PEI_C

/* Communication handles */
T_HANDLE                 idle_handle;
T_HANDLE                 hCommTST = VSI_ERROR;

#else /* IDLE_PEI_C */

extern T_HANDLE          idle_handle;
extern T_HANDLE          hCommTST;

#endif /* IDLE_PEI_C */

#endif /* IDLE_H */

/*==== END OF FILE ===========================================================*/