annotate cdg3/sap/ip.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
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1 ;********************************************************************************
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2 ;*** File : ip.pdf
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3 ;*** Creation : Wed Mar 11 09:58:12 CST 2009
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4 ;*** XSLT Processor : Apache Software Foundation / http://xml.apache.org/xalan-j / supports XSLT-Ver: 1
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5 ;*** Copyright : (c) Texas Instruments AG, Berlin Germany 2002
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6 ;********************************************************************************
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7 ;*** Document Type : Service Access Point Specification
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8 ;*** Document Name : ip
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9 ;*** Document No. : 8444.101.00.006
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10 ;*** Document Date : 2003-08-30
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11 ;*** Document Status: BEING_PROCESSED
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12 ;*** Document Author: Jacek
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13 ;********************************************************************************
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17 PRAGMA SRC_FILE_TIME "Thu Nov 29 09:43:40 2007"
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18 PRAGMA LAST_MODIFIED "2003-08-30"
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19 PRAGMA ID_AND_VERSION "8444.101.00.006"
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26 VALTAB VAL_err
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27 VAL 0 IP_ADDR_NOERROR "no error"
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28 VAL 1 IP_ADDR_NOROUTE "no route to destination"
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30 VALTAB VAL_trans_prot
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31 VAL 6 TCP_PROTOCOL "TCP protocol"
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32 VAL 17 UDP_PROTOCOL "UDP protocol"
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33 VAL 16 RAW_PROTOCOL "Chaos"
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38 VAR dst_addr "destination address" L
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41 VAR src_addr "source address" L
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44 VAR err "error code" B
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45
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46 VAL @p_ip - VAL_err@
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48 VAR trans_prot "transport protocol" B
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49
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50 VAL @p_ip - VAL_trans_prot@
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58 ; IP_ADDR_REQ 0x3900
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59 ; IP_ADDR_CNF 0x7900
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63 PRIM IP_ADDR_REQ 0x3900
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64 {
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65 dst_addr ; destination address
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66 trans_prot ; transport protocol
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67 }
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74 PRIM IP_ADDR_CNF 0x7900
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75 {
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76 src_addr ; source address
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77 err ; error code
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78 trans_prot ; transport protocol
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79 }
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