FreeCalypso > hg > fc-tourmaline

annotate src/g23m-aci/gdd_dio/gdd_dio_queue.h @ 72:7bf39f5e834d

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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 fa8dc04885d8
children
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1 /*
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2 +-----------------------------------------------------------------------------
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3 | File : gdd_dio_queue.h
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4 +-----------------------------------------------------------------------------
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5 | Copyright 2002 Texas Instruments Berlin, AG
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6 | All rights reserved.
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7 |
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8 | This file is confidential and a trade secret of Texas
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9 | Instruments Berlin, AG
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10 | The receipt of or possession of this file does not convey
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11 | any rights to reproduce or disclose its contents or to
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12 | manufacture, use, or sell anything it may describe, in
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13 | whole, or in part, without the specific written consent of
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14 | Texas Instruments Berlin, AG.
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15 +-----------------------------------------------------------------------------
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16 | Purpose : Definitions for gdd_dio_queue.c
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17 +-----------------------------------------------------------------------------
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18 */
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19
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20 #ifndef GDD_DIO_QUEUE_H
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21 #define GDD_DIO_QUEUE_H
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22
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23 /*==== INCLUDES =============================================================*/
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24
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25 #include "gdd.h"
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26
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27 #include "p_dio.h"
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28
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29
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30 /*==== DEFINITIONS ==========================================================*/
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31
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32 /**
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33 * Maximum numbers of simultaneous DIO buffers provided by PSI.
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34 * Might be increased at one stage in the future.
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35 */
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36 #define GDD_MAX_DIO_BUF 2
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37
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38 /**
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39 * Definition of buffer queue
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40 */
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41 typedef struct
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42 {
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43 T_dio_buffer * elems[GDD_MAX_DIO_BUF];
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44 U16 next_in;
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45 U16 next_out;
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46 } T_GDD_BUF_QUEUE;
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47
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48
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49 /*==== EXPORTS ===============================================================*/
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50
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51 /*
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52 +------------------------------------------------------------------------------
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53 | Function : gdd_dio_queue_clear
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54 +------------------------------------------------------------------------------
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55 | Description : Clear a queue
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56 |
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57 | Parameters : queue - pointer to queue to be cleared
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58 |
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59 +------------------------------------------------------------------------------
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60 */
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61 EXTERN void gdd_dio_queue_clear(T_GDD_BUF_QUEUE *queue);
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62
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63
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64 /*
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65 +------------------------------------------------------------------------------
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66 | Function : gdd_dio_queue_is_empty
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67 +------------------------------------------------------------------------------
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68 | Description : Check if a queue is empty
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69 |
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70 | Parameters : queue - pointer to queue to be checked
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71 |
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72 | Return : TRUE if queue is empty, FALSE otherwise
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73 +------------------------------------------------------------------------------
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74 */
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75 EXTERN BOOL gdd_dio_queue_is_empty(const T_GDD_BUF_QUEUE *queue);
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76
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77
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78 /*
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79 +------------------------------------------------------------------------------
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80 | Function : gdd_dio_queue_is_full
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81 +------------------------------------------------------------------------------
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82 | Description : Check if a queue is full
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83 |
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84 | Parameters : queue - pointer to queue to be checked
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85 |
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86 | Return : TRUE if queue is full, FALSE otherwise
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87 +------------------------------------------------------------------------------
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88 */
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89 EXTERN BOOL gdd_dio_queue_is_full(const T_GDD_BUF_QUEUE *queue);
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90
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91
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92 /*
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93 +------------------------------------------------------------------------------
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94 | Function : gdd_dio_enqueue
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95 +------------------------------------------------------------------------------
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96 | Description : Enqueue an item into the queue
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97 |
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98 | Parameters : elem - item to be enqueued
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99 | queue - pointer to queue to be modified
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100 | pos - to return the position of the enqueued item
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101 |
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102 | Return : TRUE if item is enqueued, FALSE if the queue is already full
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103 +------------------------------------------------------------------------------
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104 */
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105 EXTERN BOOL gdd_dio_enqueue(T_dio_buffer *elem, T_GDD_BUF_QUEUE *queue, /*out*/U16 *pos);
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106
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107
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108 /*
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109 +------------------------------------------------------------------------------
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110 | Function : gdd_dio_dequeue
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111 +------------------------------------------------------------------------------
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112 | Description : Dequeue an item into the queue
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113 |
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114 | Parameters : queue - pointer to queue to be modified
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115 | elem - to return the dequeued item
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116 |
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117 | Return : TRUE if item is dequeued, FALSE if the queue is empty
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118 +------------------------------------------------------------------------------
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119 */
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120 EXTERN BOOL gdd_dio_dequeue(T_GDD_BUF_QUEUE *queue, /*out*/T_dio_buffer **elem);
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121
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122 /*
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123 +------------------------------------------------------------------------------
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124 | Function : gdd_dio_queue_peek_next_for_dequeue
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125 +------------------------------------------------------------------------------
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126 | Description : Retrieves the element that is next to dequeue without actually
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127 | dequeuing it.
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128 |
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129 | Parameters : queue - pointer to queue
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130 | pos - position of element
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131 | elem - to output element value
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132 |
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133 | Return : TRUE if item is available, FALSE if the queue is empty
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134 +------------------------------------------------------------------------------
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135 */
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136 EXTERN BOOL gdd_dio_queue_peek_next_for_dequeue
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137 (const T_GDD_BUF_QUEUE *queue, T_dio_buffer **elem);
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138
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139 /*
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140 +------------------------------------------------------------------------------
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141 | Function : gdd_dio_queue_peek
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142 +------------------------------------------------------------------------------
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143 | Description : Retrieve element at specified position
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144 |
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145 | Parameters : queue - pointer to queue
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146 | pos - position of element
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147 | elem - to output element value
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148 |
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149 | Attention : This function does not do bounds checking
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150 +------------------------------------------------------------------------------
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151 */
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152 EXTERN void gdd_dio_queue_peek(const T_GDD_BUF_QUEUE *queue, U16 pos, /*out*/T_dio_buffer **elem);
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153
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154 #endif /* !GDD_DIO_QUEUE_H */
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155