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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 219afcfc6250
children
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/* 
+----------------------------------------------------------------------------- 
|  Project :  GPRS (8441)
|  Modul   :  GRLC
+----------------------------------------------------------------------------- 
|  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 :  Definitions for service TPC.
+----------------------------------------------------------------------------- 
*/ 

#ifndef GRLC_TPCS_H
#define GRLC_TPCS_H

/* TPC Signals */

EXTERN void sig_gff_tpc_pwr_ctrl_ind ( T_MAC_PWR_CTRL_IND * mac_pwr_ctrl_ind );

EXTERN void sig_tm_tpc_update_pch    ( void                                  );

/* PEI_CONFIG Signals */

EXTERN void sig_pei_config_tpc_set_pwr_par( UBYTE alpha, UBYTE gamma );

EXTERN void sig_pei_config_tpc_fix_pcl    ( UBYTE pcl );

/* Access Functions */

EXTERN void tpc_grlc_init  ( void );

EXTERN void tpc_get_pch    ( UBYTE *pch_dest );

EXTERN void tpc_set_pwr_ctrl_param
                           ( T_CGRLC_pwr_ctrl_param *pwr_ctrl_param );

EXTERN void tpc_set_glbl_pwr_ctrl_param
                           ( T_CGRLC_glbl_pwr_ctrl_param *glbl_pwr_ctrl_param );

#endif /* #ifndef GRLC_TPCS_H */