FreeCalypso > hg > fc-magnetite
view cdg3/sap/ph.pdf @ 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 | c15047b3d00d |
children |
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;******************************************************************************** ;*** File : ph.pdf ;*** Creation : Wed Mar 11 09:58:34 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 : ph ;*** Document No. : 6147.112.01.100 ;*** Document Date : 2001-10-26 ;*** Document Status: APPROVED ;*** Document Author: SBK ;******************************************************************************** PRAGMA SRC_FILE_TIME "Thu Nov 29 09:50:28 2007" PRAGMA LAST_MODIFIED "2001-10-26" PRAGMA ID_AND_VERSION "6147.112.01.100" CONST DUMMY_PH 0 ; Dummy, not used, needed to satisfy tool chain which requires at least one constant definition in a SAP VALTAB VAL_ch_type VAL 0 CH_TYPE_SACCH "SACCH" VAL 1 CH_TYPE_SDCCH "SDCCH" VAL 2 CH_TYPE_FACCH "FACCH Full Rate" VAL 3 "reserved" VAL 4 "reserved" VAL 5 "reserved" VAL 6 "reserved" VAL 7 CH_TYPE_FACCH_HR "FACCH Half Rate" VAR l2_channel "Layer 2 channel-type" B VAL @p_mphc - VAL_l2_channel@ VAR l_buf "length of content in bit" S VAR o_buf "offset of content in bit" S VAR buf "buffer content; the actual size of buf is determined and allocated at run-time and not restricted to 1;" B VAR dummy "dummy not used" B COMP sdu "message unit" { l_buf ; length of content in bit o_buf ; offset of content in bit buf [1] ; buffer content; the actual size of buf is determined and allocated at run-time and not restricted to 1; } ; PH_READY_TO_SEND 0x4100 ; PH_DATA_REQ 0x0100 ; PH_TRACE_IND 0x4102 PRIM PH_READY_TO_SEND 0x4100 { l2_channel AS ch_type ; channel type } PRIM PH_DATA_REQ 0x0100 { l2_channel AS ch_type ; channel type dummy ; dummy not used; reserved sdu ; message unit } PRIM PH_TRACE_IND 0x4102 { dummy ; dummy not used; not used }