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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           : cst.pdf
;*** Creation       : Wed Mar 11 09:57:45 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  : cst
;*** Document No.   : 8415.060.99.003
;*** Document Date  : 1999-09-21
;*** Document Status: BEING_PROCESSED
;*** Document Author: Heiner
;********************************************************************************



PRAGMA 	SRC_FILE_TIME 	"Thu Nov 29 09:39:04 2007"
PRAGMA 	LAST_MODIFIED 	"1999-09-21"
PRAGMA 	ID_AND_VERSION 	"8415.060.99.003"









VAR 	adc_values 	"AD conversion values" 	S


VAR 	stop_address 	"contains stop address" 	L


VAR 	error_code 	"Error code" 	B


VAR 	index 	"Index" 	B








; CST_ADC_IND 	0x5600
; CST_VM_STOP_PLAY_IND 	0x5601
; CST_VM_STOP_RECORD_IND 	0x5602
; CST_SR_IND 	0x5603



PRIM 	CST_ADC_IND 	0x5600
{
 	adc_values 	[9] 	 ; AD conversion values
}






PRIM 	CST_VM_STOP_PLAY_IND 	0x5601
{
 	stop_address 	 ; stop address
}






PRIM 	CST_VM_STOP_RECORD_IND 	0x5602
{
 	stop_address 	 ; stop address
}






PRIM 	CST_SR_IND 	0x5603
{
 	error_code 	 ; Error code
 	index 	 ; Index
}