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annotate src/gpf3/inc/nuc/mb_defs.h @ 680:ee3ac8c617cb

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armio.c: set GPIO2 output high initially On TI-canonical platforms GPIO2 is DCD modem control output. In TI's original code the AI_InitIOConfig() function called from Init_Target() would configure GPIO2 as an output and set the initial output value to low, but then the init code in uartfax.c called from Init_Serial_Flows() would immediately change it to high, corresponding to DCD not asserted. The result is a momentary asserted-state glitch on the DCD output. The present change eliminates this glitch, setting DCD output to not-asserted initially like it should be.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 25 Jun 2020 03:17:43 +0000
parents c41a534f33c6
children
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1 /*************************************************************************/
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2 /* */
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3 /* Copyright (c) 1993-1996 Accelerated Technology, Inc. */
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4 /* */
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5 /* PROPRIETARY RIGHTS of Accelerated Technology are involved in the */
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6 /* subject matter of this material. All manufacturing, reproduction, */
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7 /* use, and sales rights pertaining to this subject matter are governed */
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8 /* by the license agreement. The recipient of this software implicitly */
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9 /* accepts the terms of the license. */
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10 /* */
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11 /*************************************************************************/
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12
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13 /*************************************************************************/
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14 /* */
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15 /* FILE NAME VERSION */
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16 /* */
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17 /* mb_defs.h PLUS 1.2 */
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18 /* */
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19 /* COMPONENT */
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20 /* */
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21 /* MB - Mailbox Management */
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22 /* */
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23 /* DESCRIPTION */
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24 /* */
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25 /* This file contains data structure definitions and constants for */
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26 /* the message Mailbox component. */
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27 /* */
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28 /* AUTHOR */
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29 /* */
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30 /* William E. Lamie, Accelerated Technology, Inc. */
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31 /* */
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32 /* DATA STRUCTURES */
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33 /* */
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34 /* MB_MCB Mailbox control block */
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35 /* MB_SUSPEND Mailbox suspension block */
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36 /* */
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37 /* FUNCTIONS */
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38 /* */
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39 /* None */
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40 /* */
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41 /* DEPENDENCIES */
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42 /* */
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43 /* cs_defs.h Common service definitions */
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44 /* tc_defs.h Thread Control definitions */
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45 /* */
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46 /* HISTORY */
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47 /* */
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48 /* NAME DATE REMARKS */
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49 /* */
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50 /* W. Lamie 03-01-1993 Created initial version 1.0 */
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51 /* D. Lamie 04-19-1993 Verified version 1.0 */
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52 /* W. Lamie 03-01-1994 Moved include files outside of */
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53 /* the file #ifndef to allow the */
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54 /* use of actual data structures, */
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55 /* removed protection structure */
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56 /* inside of each mailbox, added */
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57 /* padding logic, resulting in */
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58 /* version 1.1 */
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59 /* R. Pfaff - */
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60 /* D. Lamie 03-18-1994 Verified version 1.1 */
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61 /* M.Q. Qian 04-17-1996 updated to version 1.2 */
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62 /* */
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63 /*************************************************************************/
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64
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65 #include "cs_defs.h" /* Common service constants */
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66 #include "tc_defs.h" /* Thread control constants */
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67
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68
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69 /* Check to see if the file has been included already. */
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70
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71 #ifndef MB_DEFS
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72 #define MB_DEFS
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73
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74
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75 /* Define constants local to this component. */
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76
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77 #define MB_MAILBOX_ID 0x4d424f58UL
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78 #define MB_MESSAGE_SIZE 4
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79
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80
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81 /* Define the Mailbox Control Block data type. */
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82
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83 typedef struct MB_MCB_STRUCT
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84 {
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85 CS_NODE mb_created; /* Node for linking to */
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86 /* created mailbox list */
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87 UNSIGNED mb_id; /* Internal MCB ID */
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88 CHAR mb_name[NU_MAX_NAME]; /* Mailbox name */
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89 DATA_ELEMENT mb_message_present; /* Message present flag */
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90 DATA_ELEMENT mb_fifo_suspend; /* Suspension type flag */
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91 #if PAD_2
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92 DATA_ELEMENT mb_padding[PAD_2];
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93 #endif
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94 UNSIGNED mb_tasks_waiting; /* Number of waiting tasks*/
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95 UNSIGNED /* Message area */
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96 mb_message_area[MB_MESSAGE_SIZE];
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97 struct MB_SUSPEND_STRUCT
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98 *mb_suspension_list; /* Suspension list */
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99 } MB_MCB;
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100
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101
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102 /* Define the mailbox suspension structure. This structure is allocated off of
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103 the caller's stack. */
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104
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105 typedef struct MB_SUSPEND_STRUCT
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106 {
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107 CS_NODE mb_suspend_link; /* Link to suspend blocks */
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108 MB_MCB *mb_mailbox; /* Pointer to the mailbox */
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109 TC_TCB *mb_suspended_task; /* Task suspended */
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110 UNSIGNED *mb_message_area; /* Pointer to message area*/
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111 STATUS mb_return_status; /* Return status */
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112 } MB_SUSPEND;
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113
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114 #endif