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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 c15047b3d00d
children
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;********************************************************************************
;*** File           : gmmaa.pdf
;*** Creation       : Wed Mar 11 09:58:03 CST 2009
;*** XSLT Processor : Apache Software Foundation / http://xml.apache.org/xalan-j / supports XSLT-Ver: 1
;*** Copyright      : (c) Texas Instruments AG, Berlin Germany 2002
;********************************************************************************
;*** Document Type  : Service Access Point Specification
;*** Document Name  : gmmaa
;*** Document No.   : 8441.107.99.001
;*** Document Date  : 1999-06-22
;*** Document Status: BEING_PROCESSED
;*** Document Author: ANS
;********************************************************************************



PRAGMA 	SRC_FILE_TIME 	"Thu Nov 29 09:41:58 2007"
PRAGMA 	LAST_MODIFIED 	"1999-06-22"
PRAGMA 	ID_AND_VERSION 	"8441.107.99.001"






VALTAB 	VAL_aa_timer
VAL 	DEF 	 	"value is incremented in multiples of 1 min"
VAL 	0 	GMMAA_TIMER_2_SEC 	"value is incremented in multiples of 2 sec"
VAL 	1 	GMMAA_TIMER_1_MIN 	"value is incremented in multiples of 1 min"
VAL 	2 	GMMAA_TIMER_1_DH 	"value is incremented in multiples of 1 decihour"
VAL 	7 	GMMAA_TIMER_DEACT 	"timer is deactivated"




VAR 	aa_timer 	"GPRS READY timer" 	B

VAL 	@p_gmmaa - VAL_aa_timer@ 	







; GMMAA_ESTABLISH_REQ 	0x2500
; GMMAA_RELEASE_IND 	0x6500
; GMMAA_ESTABLISH_REJ 	0x6501
; GMMAA_TIMER_REQ 	0x2501



PRIM 	GMMAA_ESTABLISH_REQ 	0x2500
{
}






PRIM 	GMMAA_RELEASE_IND 	0x6500
{
}






PRIM 	GMMAA_ESTABLISH_REJ 	0x6501
{
}






PRIM 	GMMAA_TIMER_REQ 	0x2501
{
 	aa_timer 	 ; GPRS AA-READY  timer
}