annotate cdg-hybrid/sap/udpa.pdf @ 72:7bf39f5e834d

backlight control on Luna: switch PWL instead of LEDB This change is preliminary toward upcoming rework of backlight control logic in our UI firmware. LEDB does not exist on Tango-based platforms (it is not brought out on Tango modules), thus turning it on and off produces absolutely no effect beyond making L1 disable deep sleep when LEDB is turned on. However, both iWOW DSK and our upcoming FC Caramel2 boards have a PWL LED, so let's switch that LED on and off to indicate the state of the UI firmware's backlight control. Note that we are NOT switching the actual Luna LCD backlight here, even though it is trivially controlled with a GPIO. The reason for this seemingly strange choice is that we don't want to turn this development board LCD backlight off until we bring the higher-level backlight control logic up to par, including new logic to "swallow" the first keypress that turns on the darkened LCD.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 24 Oct 2020 07:39:54 +0000
parents 35f7a1dc9f7d
children
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1 ;********************************************************************************
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2 ;*** File : udpa.pdf
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3 ;*** Creation : Wed Mar 11 09:58:55 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 : udpa
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9 ;*** Document No. : 8444.103.02.006
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10 ;*** Document Date : 2003-08-26
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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 09:56:38 2007"
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18 PRAGMA LAST_MODIFIED "2003-08-26"
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19 PRAGMA ID_AND_VERSION "8444.103.02.006"
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23 CONST UDPA_ENTITY_NAME_LEN 6 ; maximum length of entity name including NULL
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27 VALTAB VAL_dti_conn
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28 VAL 0 UDPA_CONNECT_DTI "Connect DTI2 to UDP"
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29 VAL 1 UDPA_DISCONNECT_DTI "Disconnect DTI2 from UDP"
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31 VALTAB VAL_link_id
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32 VAL 0 UDPA_LINK_ID_DEFAULT "Default link id"
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33
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34 VALTAB VAL_dti_direction
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35 VAL 0 UDPA_DTI_TO_HIGHER_LAYER "DTI2 used normally"
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36 VAL 1 UDPA_DTI_TO_LOWER_LAYER "DTI2 is inverted"
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37
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38 VALTAB VAL_cmd
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39 VAL 0 UDPA_CONFIG_UP "enable the interface"
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40 VAL 1 UDPA_CONFIG_DOWN "disable the interface"
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45 VAR dti_conn "DTI2 connect" B
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46
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47 VAL @p_udpa - VAL_dti_conn@
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48
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49 VAR link_id "Link identifier" L
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50
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51 VAL @p_udpa - VAL_link_id@
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52
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53 VAR dti_direction "DTI2 direction" B
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54
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55 VAL @p_udpa - VAL_dti_direction@
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56
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57 VAR entity_name "name of an neighbour entity" B
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60 VAR cmd "command" B
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61
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62 VAL @p_udpa - VAL_cmd@
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70 ; UDPA_DTI_REQ 0x8000003B
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71 ; UDPA_DTI_CNF 0x8000403B
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72 ; UDPA_DTI_IND 0x8001403B
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73 ; UDPA_CONFIG_REQ 0x8001003B
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74 ; UDPA_CONFIG_CNF 0x8002403B
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75
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76
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78 PRIM UDPA_DTI_REQ 0x8000003B
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79 {
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80 dti_conn ; DTI connect
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81 entity_name [UDPA_ENTITY_NAME_LEN] ; Entity name
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82 link_id ; Link identifier
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83 dti_direction ; DTI direction
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84 }
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91 PRIM UDPA_DTI_CNF 0x8000403B
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92 {
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93 dti_conn ; DTI connect
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94 link_id ; Link identifier
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95 }
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102 PRIM UDPA_DTI_IND 0x8001403B
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103 {
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104 link_id ; link identifier
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105 }
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112 PRIM UDPA_CONFIG_REQ 0x8001003B
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113 {
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114 cmd ; Command
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115 }
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122 PRIM UDPA_CONFIG_CNF 0x8002403B
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123 {
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124 }
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