root / trunk / code / behaviors / formation_control / circle / circle.c @ 1627
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1 | 1594 | azirbel | #include <dragonfly_lib.h> |
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2 | #include <wl_basic.h> |
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3 | #include <encoders.h> |
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4 | #include "circle.h" |
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5 | |||
6 | int EDGE = 0; |
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7 | int BEACON = 1; |
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8 | 1618 | jmcarrol | int timeout = 0; |
9 | 1626 | gnagaraj | int sending = 0; |
10 | int stop2 = 0; |
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11 | struct vector slave_position;
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12 | int desired_max_bom;
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13 | int bom_max_counter;
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14 | 1594 | azirbel | |
15 | 1618 | jmcarrol | |
16 | 1626 | gnagaraj | void set_desired_max_bom(int desired_angle) |
17 | { |
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18 | if (desired_angle >= 348 || desired_angle < 11) desired_max_bom = 0; |
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19 | if (desired_angle >= 11 && desired_angle < 33) desired_max_bom = 1; |
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20 | if (desired_angle >= 33 && desired_angle < 56) desired_max_bom = 2; |
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21 | if (desired_angle >= 56 && desired_angle < 78) desired_max_bom = 3; |
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22 | if (desired_angle >= 78 && desired_angle < 101) desired_max_bom = 4; |
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23 | if (desired_angle >= 101 && desired_angle < 123) desired_max_bom = 5; |
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24 | if (desired_angle >= 123 && desired_angle < 145) desired_max_bom = 6; |
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25 | if (desired_angle >= 145 && desired_angle < 167) desired_max_bom = 7; |
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26 | if (desired_angle >= 167 && desired_angle < 190) desired_max_bom = 8; |
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27 | if (desired_angle >= 190 && desired_angle < 212) desired_max_bom = 9; |
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28 | if (desired_angle >= 212 && desired_angle < 235) desired_max_bom = 10; |
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29 | if (desired_angle >= 235 && desired_angle < 257) desired_max_bom = 11; |
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30 | if (desired_angle >= 257 && desired_angle < 280) desired_max_bom = 12; |
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31 | if (desired_angle >= 280 && desired_angle < 302) desired_max_bom = 13; |
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32 | if (desired_angle >= 302 && desired_angle < 325) desired_max_bom = 14; |
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33 | if (desired_angle >= 325 && desired_angle < 348) desired_max_bom = 15; |
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34 | } |
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35 | |||
36 | 1627 | gnagaraj | void switch_sending(void) |
37 | 1626 | gnagaraj | { |
38 | if(sending)
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39 | { |
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40 | sending = 0;
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41 | bom_off(); |
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42 | } |
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43 | else
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44 | { |
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45 | sending = 1;
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46 | bom_on(); |
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47 | } |
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48 | } |
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49 | |||
50 | |||
51 | 1594 | azirbel | /*
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52 | This program is used to make robots target a center (leader) robot using the BOM,
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53 | then drive toward it and stop at a certain distance away.
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54 | |||
55 | The distance will eventually be adjustable.
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56 | |||
57 | With adjustment, the leader robot will be able to turn and use its standardized
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58 | rangefinder to reposition or space the robots evenly.
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59 | |||
60 | AuTHORS: Nico, Alex, Reva, Echo, Steve
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61 | */
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62 | |||
63 | |||
64 | /*
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65 | TODO:
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66 | 1610 | azirbel | Used: Bots 1, 7
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67 | 16 Performed Badly
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68 | 12 worked ok as beacon, not well as edge
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69 | |||
70 | Fix orient code so the bot does not toggle back and forth when it tries to turn
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71 | |||
72 | 1594 | azirbel | Use the center bot to check distances
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73 | 1610 | azirbel | Done--> Count them ("spam" method)
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74 | 1594 | azirbel | Use beacon to find relative positions
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75 | Beacon tells them how to move to be at the right distance
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76 | *done*Wireless communication, initialization
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77 | */
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78 | |||
79 | 1618 | jmcarrol | |
80 | |||
81 | 1594 | azirbel | void forward(int speed){ // set the motors to this forward speed. |
82 | motor_l_set(FORWARD,speed); |
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83 | motor_r_set(FORWARD,speed); |
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84 | } |
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85 | void left(int speed){ // turn left at this speed. |
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86 | motor_l_set(FORWARD,speed); |
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87 | motor_r_set(BACKWARD,speed); |
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88 | } |
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89 | void right(int speed){ |
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90 | motor_l_set(BACKWARD,speed); |
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91 | motor_r_set(FORWARD,speed); |
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92 | } |
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93 | void stop(void){ // could be set to motors_off(), or just use this as an alternative. |
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94 | motor_l_set(BACKWARD,0);
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95 | motor_r_set(FORWARD,0);
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96 | } |
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97 | void setforward(int spd1, int spd2){ |
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98 | motor_l_set(FORWARD,spd1); |
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99 | motor_r_set(FORWARD,spd2); |
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100 | } |
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101 | void backward(int speed){ |
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102 | motor_l_set(BACKWARD, speed); |
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103 | motor_r_set(BACKWARD, speed); |
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104 | } |
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105 | int get_distance(void){ // takes an averaged reading of the front rangefinder |
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106 | int temp,distance,kk=5; // kk sets this to 5 readings. |
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107 | distance =0;
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108 | for (int i=0; i<kk; i++){ |
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109 | temp = range_read_distance(IR2); |
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110 | if (temp == -1) |
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111 | { |
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112 | //temp=0;
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113 | i--; |
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114 | } |
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115 | else
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116 | distance+= temp; |
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117 | delay_ms(3);
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118 | } |
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119 | if (kk>0) |
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120 | return (int)(distance/kk); |
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121 | else
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122 | return 0; |
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123 | } |
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124 | 1618 | jmcarrol | |
125 | |||
126 | 1626 | gnagaraj | |
127 | /*~~~~~~~~~~~~~ NEED document
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128 | */
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129 | 1627 | gnagaraj | void correctTurn(void) |
130 | 1618 | jmcarrol | { |
131 | 1627 | gnagaraj | orb1_set_color(BLUE); // BLUE and PURPLE
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132 | left(220);
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133 | while(1) |
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134 | 1618 | jmcarrol | { |
135 | 1627 | gnagaraj | int bomNum = 0; // bomNum is the current maximum reading |
136 | bom_refresh(BOM_ALL); |
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137 | bomNum = bom_get_max(); |
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138 | usb_puti(bomNum); |
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139 | if(bomNum == 4) // when it's turned the right way, stop |
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140 | 1618 | jmcarrol | { |
141 | 1627 | gnagaraj | timeout = 0;
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142 | //motor_l_set(1, 200);
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143 | //motor_r_set(1, 200);
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144 | break; // exits the while() loop to stop the method |
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145 | 1618 | jmcarrol | } |
146 | 1627 | gnagaraj | else // facing the wrong way |
147 | 1618 | jmcarrol | { |
148 | 1627 | gnagaraj | if(bomNum == -1){ |
149 | |||
150 | timeout++; |
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151 | |||
152 | if(timeout > 500000) // if it's been looking too long, move a little bit as it turns |
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153 | { |
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154 | motor_r_set(FORWARD, 210);
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155 | motor_l_set(BACKWARD, 190);
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156 | } |
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157 | } |
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158 | else if((bomNum >= 12) || (bomNum < 4)) |
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159 | { |
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160 | motor_l_set(FORWARD, 200);
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161 | motor_r_set(BACKWARD, 200);
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162 | timeout = 0;
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163 | } |
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164 | else
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165 | { |
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166 | motor_l_set(BACKWARD, 200);
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167 | motor_r_set(FORWARD, 200);
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168 | timeout = 0;
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169 | } |
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170 | 1618 | jmcarrol | } |
171 | } |
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172 | 1627 | gnagaraj | return;
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173 | 1618 | jmcarrol | } |
174 | |||
175 | 1626 | gnagaraj | |
176 | /*~~~~~~~~~~~~~~ NEED document
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177 | 1627 | gnagaraj | |
178 | Actually, we should just get rid of this.
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179 | 1626 | gnagaraj | */
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180 | 1618 | jmcarrol | void correctApproach(void) |
181 | { |
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182 | int bomNum = 0; |
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183 | bom_refresh(BOM_ALL); |
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184 | bomNum = bom_get_max(); |
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185 | usb_puti(bomNum); |
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186 | if(bomNum == 4) |
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187 | { |
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188 | motor_l_set(1, 200); |
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189 | motor_r_set(1, 200); |
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190 | } |
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191 | else
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192 | { |
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193 | if(bomNum == -1){} |
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194 | else if((bomNum >= 12) || (bomNum < 4)) |
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195 | { |
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196 | motor_l_set(FORWARD, 200);
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197 | motor_r_set(BACKWARD, 200);
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198 | } |
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199 | else
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200 | { |
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201 | motor_l_set(BACKWARD, 200);
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202 | motor_r_set(FORWARD, 200);
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203 | } |
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204 | delay_ms(100);
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205 | } |
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206 | } |
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207 | |||
208 | 1626 | gnagaraj | |
209 | 1618 | jmcarrol | //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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210 | 1594 | azirbel | void go_straight(void){ // drives forward a hardcoded distance. May not be useful. |
211 | forward(200);
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212 | encoder_rst_dx(LEFT); |
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213 | encoder_rst_dx(RIGHT); |
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214 | delay_ms(100);
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215 | int x_left = encoder_get_x(LEFT), x_right = encoder_get_x(RIGHT);
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216 | int count = 0; |
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217 | int d;
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218 | while (count<25){ //count = 25 when bot6; count <12 |
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219 | x_left = encoder_get_x(LEFT); |
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220 | x_right = encoder_get_x(RIGHT); |
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221 | d = x_right-x_left; |
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222 | if (d>13 || d<-13){ |
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223 | if(d<50 && d>-50){ |
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224 | d = round(1.0*d/4); |
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225 | setforward(200+d, 200-d); |
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226 | } |
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227 | } |
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228 | delay_ms(32);
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229 | count++; |
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230 | } |
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231 | } |
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232 | |||
233 | 1626 | gnagaraj | |
234 | /*
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235 | BLINK the given number times
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236 | */
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237 | 1594 | azirbel | void blink(int num) { |
238 | for(int i = 0; i<num; i++) |
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239 | { |
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240 | orb_set_color(ORB_OFF); |
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241 | 1610 | azirbel | delay_ms(200);
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242 | 1594 | azirbel | orb_set_color(RED); |
243 | 1610 | azirbel | delay_ms(200);
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244 | 1594 | azirbel | } |
245 | orb_set_color(ORB_OFF); |
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246 | } |
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247 | |||
248 | |||
249 | |||
250 | 1626 | gnagaraj | |
251 | |||
252 | 1594 | azirbel | int main(void) |
253 | { |
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254 | /* Initialize dragonfly board */
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255 | 1618 | jmcarrol | dragonfly_init(ALL_ON); |
256 | /* Initialize the basic wireless library */
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257 | wl_basic_init_default(); |
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258 | /* Set the XBee channel to your assigned channel */ /* Set the XBee channel to your assigned channel */ |
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259 | 1594 | azirbel | wl_set_channel(24);
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260 | |||
261 | 1626 | gnagaraj | int sending_counter = 0; |
262 | 1594 | azirbel | int robotid = get_robotid();
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263 | int used[16]; |
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264 | 1597 | azirbel | for (int i=0; i<16; i++) used[i] = 0; |
265 | 1594 | azirbel | char send_buffer[2]; |
266 | int data_length;
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267 | unsigned char *packet_data=wl_basic_do_default(&data_length); |
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268 | |||
269 | |||
270 | int state = EDGE;
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271 | int beacon_State=0; |
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272 | 1610 | azirbel | int waitingCounter=0; |
273 | int robotsReceived=0; |
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274 | 1627 | gnagaraj | |
275 | 1594 | azirbel | if(wheel()<100) |
276 | { |
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277 | state=EDGE; |
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278 | } |
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279 | else
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280 | { |
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281 | state=BEACON; |
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282 | } |
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283 | |||
284 | int distance=1000; // how far away to stop. |
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285 | 1610 | azirbel | int onefoot=300, speed=250; // one foot is 490 for bot 1; one foot is 200 for bot6 |
286 | 1594 | azirbel | |
287 | 1596 | azirbel | while(1) |
288 | { |
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289 | 1626 | gnagaraj | bom_refresh(BOM_ALL); |
290 | |||
291 | /*
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292 | *******TERMinology**************
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293 | EDGE=0 other names: slave. Definition: robots on the edge of the circle;
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294 | BEACON=1 other name: master. Definition: robots in the center of the circle;
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295 | |||
296 | |||
297 | *******EXPECTED MOVES **********
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298 | The designed movement:
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299 | 1. one center robot, several edge robots are on;
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300 | 2. center robots: button 1 is pressed;
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301 | 3. center robots: send global package telling edges that he exists;
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302 | 4. EDGE robots response with ACK.
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303 | 5. EDGE robots wait for center robots to finish counting (DONE package)
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304 | 6. *******************TODO ***************
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305 | */
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306 | |||
307 | |||
308 | // decide if its is center or not.
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309 | 1596 | azirbel | switch(state)
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310 | { |
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311 | 1626 | gnagaraj | /**********
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312 | if EDGE /slave robots
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313 | */
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314 | case 0: |
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315 | 1594 | azirbel | |
316 | 1626 | gnagaraj | /*
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317 | 0. EDGE robots are on.
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318 | 1. They are waiting for ExiST pacakage from the Center robots
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319 | 2. After they receive the package, they send ACK package to center.
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320 | 3. Wait the center robot to finish counting all EDGE robots
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321 | */
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322 | while(1) |
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323 | 1594 | azirbel | { |
324 | 1626 | gnagaraj | bom_off(); |
325 | 1618 | jmcarrol | orb1_set_color(YELLOW);orb2_set_color(CYAN); |
326 | 1594 | azirbel | packet_data=wl_basic_do_default(&data_length); |
327 | if(packet_data != 0 && data_length>=2 && packet_data[0]==CIRCLE_ACTION_EXIST) |
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328 | { |
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329 | send_buffer[0]=CIRCLE_ACTION_ACK;
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330 | send_buffer[1]=robotid;
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331 | |||
332 | wl_basic_send_global_packet(42,send_buffer,2); |
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333 | break;
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334 | } |
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335 | } |
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336 | |||
337 | 1626 | gnagaraj | /*
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338 | 1. Wait for DONE package
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339 | 2. The counting process is DONE
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340 | */
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341 | while(1) |
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342 | 1596 | azirbel | { |
343 | 1618 | jmcarrol | orb_set_color(YELLOW);orb2_set_color(PURPLE); |
344 | 1594 | azirbel | packet_data=wl_basic_do_default(&data_length); |
345 | wl_basic_send_global_packet(42,send_buffer,2); |
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346 | 1596 | azirbel | |
347 | 1594 | azirbel | if(packet_data != 0 && data_length>=2 && packet_data[0]==CIRCLE_ACTION_DONE) |
348 | { |
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349 | break;
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350 | } |
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351 | } |
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352 | |||
353 | 1626 | gnagaraj | |
354 | // COLOR afer DONE ---> MAGENTA
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355 | 1618 | jmcarrol | orb_set_color(MAGENTA); |
356 | //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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357 | 1627 | gnagaraj | correctTurn(); // turn to face the beacon
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358 | 1626 | gnagaraj | forward(220);
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359 | 1594 | azirbel | //range_init();
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360 | |||
361 | |||
362 | distance = get_distance(); |
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363 | while (distance>=onefoot || distance==0) |
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364 | { |
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365 | if(distance==0) |
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366 | orb_set_color(WHITE); |
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367 | 1618 | jmcarrol | //correctApproach();
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368 | 1594 | azirbel | distance = get_distance(); |
369 | delay_ms(14);
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370 | } |
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371 | 1618 | jmcarrol | |
372 | 1594 | azirbel | stop(); |
373 | 1618 | jmcarrol | orb_set_color(LIME); |
374 | 1594 | azirbel | |
375 | 1626 | gnagaraj | send_buffer[0]=CIRCLE_ACTION_ACK;
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376 | send_buffer[1]=robotid;
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377 | wl_basic_send_global_packet(42,send_buffer,2); |
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378 | 1594 | azirbel | |
379 | 1626 | gnagaraj | // NEW CODE FROM JOEL
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380 | 1596 | azirbel | |
381 | 1626 | gnagaraj | while(1) |
382 | { |
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383 | packet_data = wl_basic_do_default(&data_length); |
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384 | |||
385 | if(packet_data[0]=='s') stop2=1; |
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386 | if(packet_data[0]=='a') switch_sending(); |
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387 | |||
388 | if(sending)
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389 | { |
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390 | |||
391 | } |
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392 | 1596 | azirbel | |
393 | 1626 | gnagaraj | else // recieving |
394 | { |
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395 | |||
396 | if(stop2)
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397 | { |
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398 | motor_l_set(FORWARD,0);
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399 | motor_r_set(FORWARD,0);
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400 | orb1_set_color(GREEN); |
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401 | } |
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402 | |||
403 | else
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404 | { |
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405 | int max_bom = bom_get_max();
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406 | /*usb_puts("bom_get_max : ");
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407 | usb_puti(max_bom);
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408 | usb_puts("/n/r");*/
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409 | |||
410 | |||
411 | if(max_bom == 8) |
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412 | { |
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413 | orb2_set_color(BLUE); |
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414 | motor_r_set(FORWARD,180);
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415 | motor_l_set(FORWARD,180);
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416 | |||
417 | } |
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418 | else if(max_bom == 7 || max_bom == 6 || max_bom == 5) |
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419 | { |
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420 | motor_l_set(FORWARD,180);
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421 | motor_r_set(FORWARD,0);
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422 | } |
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423 | else if(max_bom == -1); |
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424 | else
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425 | { |
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426 | orb2_set_color(GREEN); |
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427 | motor_l_set(FORWARD,0);
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428 | motor_r_set(FORWARD,180);
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429 | } |
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430 | } |
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431 | |||
432 | } |
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433 | |||
434 | delay_ms(10);
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435 | |||
436 | } //end while
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437 | break;
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438 | |||
439 | // END for EDGE robots
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440 | |||
441 | |||
442 | |||
443 | |||
444 | |||
445 | |||
446 | /***************
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447 | if The CENTER/BEACON/MASTER robot
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448 | */
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449 | case 1: // BEACON /master /enter robots |
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450 | 1594 | azirbel | switch(beacon_State) {
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451 | 1626 | gnagaraj | /*
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452 | 1. center robots on wait for pressing button 1
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453 | */
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454 | case 0: |
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455 | 1594 | azirbel | bom_on(); |
456 | orb_set_color(PURPLE); |
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457 | if(button1_click()) beacon_State=1; |
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458 | 1626 | gnagaraj | break;
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459 | /*
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460 | 1. Send EXIST package to EDGE robots
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461 | */
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462 | 1596 | azirbel | case 1: // sends a global exist packet to see how many robots there are |
463 | 1618 | jmcarrol | orb_set_color(RED); |
464 | 1594 | azirbel | send_buffer[0]=CIRCLE_ACTION_EXIST;
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465 | send_buffer[1]=get_robotid();
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466 | wl_basic_send_global_packet(42,send_buffer,2); |
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467 | beacon_State=2;
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468 | 1626 | gnagaraj | break;
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469 | /*
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470 | 1. Count the number of the EDGE robots
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471 | *******NOTE: at most 1500 times of loop ******
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472 | */
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473 | case 2: |
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474 | waitingCounter++; |
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475 | orb1_set_color(YELLOW); |
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476 | orb2_set_color(BLUE); |
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477 | packet_data=wl_basic_do_default(&data_length); |
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478 | if(packet_data!=0 && data_length>=2 && packet_data[0]==CIRCLE_ACTION_ACK) |
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479 | { |
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480 | 1627 | gnagaraj | orb_set_color(RED); |
481 | orb2_set_color(BLUE); |
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482 | 1626 | gnagaraj | //only add to robots seen if you haven't gotten an ACK from this robot
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483 | if(used[packet_data[1]]==0){ |
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484 | robotsReceived++; |
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485 | used[packet_data[1]]=1; |
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486 | } |
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487 | 1594 | azirbel | } |
488 | 1626 | gnagaraj | if(waitingCounter >= 1500){ |
489 | beacon_State=3;
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490 | } |
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491 | break;
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492 | /*
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493 | COUNTing is DONE.
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494 | Sending DONE package.
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495 | */
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496 | 1594 | azirbel | case 3: |
497 | 1627 | gnagaraj | blink(robotsReceived); |
498 | 1626 | gnagaraj | orb_set_color(GREEN); |
499 | send_buffer[0]=CIRCLE_ACTION_DONE;
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500 | wl_basic_send_global_packet(42,send_buffer,2); |
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501 | beacon_State=4;
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502 | break;
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503 | /*
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504 | Wait for all the robots to get to right distance/position
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505 | */
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506 | case 4: |
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507 | orb1_set_color(YELLOW); |
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508 | orb2_set_color(WHITE); |
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509 | |||
510 | int numOk = 0; |
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511 | |||
512 | while(numOk<robotsReceived)
|
||
513 | { |
||
514 | packet_data=wl_basic_do_default(&data_length); |
||
515 | if(packet_data!=0 && data_length>=2 && packet_data[0]==CIRCLE_ACTION_ACK) |
||
516 | { |
||
517 | numOk++; |
||
518 | } |
||
519 | } |
||
520 | |||
521 | beacon_State = 5;
|
||
522 | break; // <----------------------------------------------------------Echo wrote this "break". need to be checked. |
||
523 | |||
524 | /**
|
||
525 | NEED to be documented
|
||
526 | */
|
||
527 | case 5: |
||
528 | orb_set_color(BLUE); |
||
529 | // clock for switching the BOMs between the master and slave
|
||
530 | if(sending_counter++>4) |
||
531 | { |
||
532 | switch_sending(); |
||
533 | sending_counter = 0;
|
||
534 | send_buffer[0] = 'a'; |
||
535 | wl_basic_send_global_packet(42, send_buffer, 1); |
||
536 | } |
||
537 | |||
538 | |||
539 | if(sending)
|
||
540 | { |
||
541 | |||
542 | } |
||
543 | |||
544 | else // recieving |
||
545 | { |
||
546 | int max_bom = bom_get_max();
|
||
547 | usb_puts("bom_get_max : ");
|
||
548 | usb_puti(max_bom); |
||
549 | usb_puts("\n\r");
|
||
550 | |||
551 | if(max_bom == desired_max_bom)
|
||
552 | { |
||
553 | // only stops the slave if two consecutive boms
|
||
554 | // reading give the desired bom as the max one. Filters the noise.
|
||
555 | if(bom_max_counter)
|
||
556 | { |
||
557 | send_buffer[0] = 's'; |
||
558 | wl_basic_send_global_packet(42, send_buffer, 2); |
||
559 | } |
||
560 | bom_max_counter =1;
|
||
561 | } |
||
562 | else bom_max_counter = 0; |
||
563 | |||
564 | } |
||
565 | |||
566 | break;
|
||
567 | } |
||
568 | 1594 | azirbel | } |
569 | } |
||
570 | |||
571 | orb_set_color(RED); |
||
572 | while(1); /* END HERE */ |
||
573 | |||
574 | 1626 | gnagaraj | //return 0;
|
575 | 1594 | azirbel | } |