root / demos / hunter_prey / lib / src / libwireless / sensor_matrix.c @ 1828
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1 | 1828 | emullini | /**
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2 | * Copyright (c) 2007 Colony Project
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3 | *
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4 | * Permission is hereby granted, free of charge, to any person
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5 | * obtaining a copy of this software and associated documentation
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6 | * files (the "Software"), to deal in the Software without
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7 | * restriction, including without limitation the rights to use,
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8 | * copy, modify, merge, publish, distribute, sublicense, and/or sell
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9 | * copies of the Software, and to permit persons to whom the
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10 | * Software is furnished to do so, subject to the following
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11 | * conditions:
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12 | *
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13 | * The above copyright notice and this permission notice shall be
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14 | * included in all copies or substantial portions of the Software.
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15 | *
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16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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17 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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18 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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19 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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20 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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21 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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22 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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23 | * OTHER DEALINGS IN THE SOFTWARE.
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24 | **/
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25 | |||
26 | /**
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27 | * @file sensor_matrix.c
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28 | * @brief Sensor Matrix implementation
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29 | *
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30 | * Implementation of a sensor matrix for storing localization implementation.
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31 | *
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32 | * @author Brian Coltin, Colony Project, CMU Robotics Club
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33 | **/
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34 | |||
35 | #include "wl_defs.h" |
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36 | #include "sensor_matrix.h" |
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37 | |||
38 | // the global sensor matrix
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39 | SensorMatrix m; |
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40 | |||
41 | /**
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42 | * Initializes the sensor matrix.
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43 | *
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44 | * @return the newly created sensor matrix
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45 | **/
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46 | void sensor_matrix_create()
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47 | { |
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48 | int i, j;
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49 | |||
50 | m.numJoined = 0;
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51 | |||
52 | for (i = 0; i < MAXIMUM_XBEE_ID; i++) |
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53 | { |
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54 | m.joined[i] = 0;
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55 | #ifndef BAYBOARD
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56 | for (j = 0; j < MAXIMUM_XBEE_ID; j++) |
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57 | m.matrix[i][j] = READING_UNKNOWN; |
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58 | #endif
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59 | } |
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60 | } |
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61 | |||
62 | /**
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63 | * Sets the sensor reading for robot robot to reading.
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64 | *
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65 | * @param observer the id of the robot who made the reading
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66 | * @param robot the id of the robot who the reading is for
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67 | * @param reading the BOM reading from observer to robot
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68 | */
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69 | void sensor_matrix_set_reading(int observer, int robot, int reading) |
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70 | { |
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71 | #ifndef BAYBOARD
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72 | if (robot >= MAXIMUM_XBEE_ID || observer >= MAXIMUM_XBEE_ID)
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73 | { |
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74 | WL_DEBUG_PRINT("ID too large.");
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75 | return;
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76 | } |
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77 | |||
78 | m.matrix[observer][robot] = (unsigned char)reading; |
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79 | #endif
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80 | } |
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81 | |||
82 | /**
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83 | * Gets the sensor reading for a robot to another robot.
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84 | *
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85 | * @param observer the robot whose reading we check
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86 | * @param robot the robot who we are checking the reading to
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87 | *
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88 | * @return the observer's BOM reading for robot
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89 | **/
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90 | int sensor_matrix_get_reading(int observer, int robot) |
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91 | { |
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92 | #ifndef BAYBOARD
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93 | if (observer >= MAXIMUM_XBEE_ID || robot >= MAXIMUM_XBEE_ID)
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94 | return -1; |
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95 | |||
96 | return (int)m.matrix[observer][robot]; |
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97 | #else
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98 | return -1; |
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99 | #endif
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100 | } |
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101 | |||
102 | /**
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103 | * Sets whether or not the given robot is part of the token ring.
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104 | *
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105 | * @param robot the robot to set as a member / nonmember of the token ring
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106 | * @param in 1 if the robot is in the token ring, 0 otherwise
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107 | **/
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108 | void sensor_matrix_set_in_ring(int robot, int in) |
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109 | { |
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110 | if (robot >= MAXIMUM_XBEE_ID)
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111 | { |
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112 | WL_DEBUG_PRINT("ID too large.");
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113 | return;
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114 | } |
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115 | |||
116 | if (in == 1 && m.joined[robot] == 0) |
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117 | m.numJoined++; |
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118 | |||
119 | if (in == 0 && m.joined[robot]) |
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120 | m.numJoined--; |
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121 | m.joined[robot] = in; |
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122 | } |
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123 | |||
124 | /**
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125 | * Checks if the given robot is in the token ring.
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126 | *
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127 | * @param robot the ID of the robot to check
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128 | *
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129 | * @return 1 if the robot is in the token ring, 0 otherwise
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130 | **/
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131 | int sensor_matrix_get_in_ring(int robot) |
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132 | { |
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133 | if (robot >= MAXIMUM_XBEE_ID)
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134 | return -1; |
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135 | |||
136 | return m.joined[robot];
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137 | } |
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138 | |||
139 | /**
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140 | * Returns the number of robots which have joined the
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141 | * token ring.
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142 | *
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143 | * @return the number of robots in the token ring
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144 | **/
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145 | int sensor_matrix_get_joined(void) |
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146 | { |
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147 | return m.numJoined;
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148 | } |
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149 | |||
150 | /**
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151 | * Returns the maximum XBee id of a robot which can be stored
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152 | * in the sensor matrix.
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153 | *
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154 | * @return the maximum number of robots which can be stored
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155 | **/
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156 | int sensor_matrix_get_size(void) |
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157 | { |
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158 | return MAXIMUM_XBEE_ID;
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159 | } |