root / trunk / code / behaviors / formation_control / circle / circle.c @ 1691
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#include <dragonfly_lib.h> |
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#include <wl_basic.h> |
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#include <encoders.h> |
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#include "circle.h" |
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|
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int EDGE = 0; |
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int BEACON = 1; |
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int timeout = 0; |
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int sending = 0; |
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int stop2 = 0; |
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struct vector slave_position;
|
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int desired_max_bom;
|
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int bom_max_counter;
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|
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//Last used 12,13,7(BOM)
|
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void set_desired_max_bom(int desired_angle) |
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{ |
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if (desired_angle >= 348 || desired_angle < 11) desired_max_bom = 0; |
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if (desired_angle >= 11 && desired_angle < 33) desired_max_bom = 1; |
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if (desired_angle >= 33 && desired_angle < 56) desired_max_bom = 2; |
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if (desired_angle >= 56 && desired_angle < 78) desired_max_bom = 3; |
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if (desired_angle >= 78 && desired_angle < 101) desired_max_bom = 4; |
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if (desired_angle >= 101 && desired_angle < 123) desired_max_bom = 5; |
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if (desired_angle >= 123 && desired_angle < 145) desired_max_bom = 6; |
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if (desired_angle >= 145 && desired_angle < 167) desired_max_bom = 7; |
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if (desired_angle >= 167 && desired_angle < 190) desired_max_bom = 8; |
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if (desired_angle >= 190 && desired_angle < 212) desired_max_bom = 9; |
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if (desired_angle >= 212 && desired_angle < 235) desired_max_bom = 10; |
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if (desired_angle >= 235 && desired_angle < 257) desired_max_bom = 11; |
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if (desired_angle >= 257 && desired_angle < 280) desired_max_bom = 12; |
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if (desired_angle >= 280 && desired_angle < 302) desired_max_bom = 13; |
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if (desired_angle >= 302 && desired_angle < 325) desired_max_bom = 14; |
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if (desired_angle >= 325 && desired_angle < 348) desired_max_bom = 15; |
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} |
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|
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void switch_sending(void) |
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{ |
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if(sending)
|
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{ |
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sending = 0;
|
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bom_off(); |
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} |
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else
|
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{ |
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sending = 1;
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bom_on(); |
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} |
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} |
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|
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/*
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Current situation:
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go to the center. ends when each edge robto send "I am here" message
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|
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I think compasses are in the club, but not on the robots?
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|
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Assume we have the compasses, and write pseudocode, maybe?
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|
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TODO:
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Center:
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1. Make a move forward method/state to make the circle begin moving as a group.
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Edge:
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2. Find a way to follow the middle robot and preserve circle structure, or follow a directional command given by the center robot.
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3. Fix the error case with wireless - if the center robot does not receive the first exist packet, the robot keeps sending it and will cause error later.
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|
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In general:
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More testing. Especially with robots that are actually working.
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*/
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|
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|
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/*
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This program is used to make robots target a center (leader) robot using the BOM,
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then drive toward it and stop at a certain distance away.
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The distance will eventually be adjustable.
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With adjustment, the leader robot will be able to turn and use its standardized
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rangefinder to reposition or space the robots evenly.
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AuTHORS: Nico, Alex, Reva, Echo, Steve
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*/
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|
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|
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/*
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TODO:
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Used: Bots 1, 7
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16 Performed Badly
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12 worked ok as beacon, not well as edge
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|
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Fix orient code so the bot does not toggle back and forth when it tries to turn
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|
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Use the center bot to check distances
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Done--> Count them ("spam" method)
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Use beacon to find relative positions
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Beacon tells them how to move to be at the right distance
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*done*Wireless communication, initialization
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*/
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|
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void forward(int speed){ // set the motors to this forward speed. |
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motor_l_set(FORWARD,speed); |
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motor_r_set(FORWARD,speed); |
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} |
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void left(int speed){ // turn left at this speed. |
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motor_l_set(FORWARD,speed); |
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motor_r_set(BACKWARD,speed); |
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} |
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void right(int speed){ |
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motor_l_set(BACKWARD,speed); |
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motor_r_set(FORWARD,speed); |
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} |
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void stop(void){ // could be set to motors_off(), or just use this as an alternative. |
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motor_l_set(BACKWARD,0); // stop() is better - motors_off() creates a slight delay to turn them back on. |
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motor_r_set(FORWARD,0);
|
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} |
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void setforward(int spd1, int spd2){ |
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motor_l_set(FORWARD,spd1); |
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motor_r_set(FORWARD,spd2); |
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} |
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void backward(int speed){ |
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motor_l_set(BACKWARD, speed); |
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motor_r_set(BACKWARD, speed); |
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} |
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int get_distance(void){ // takes an averaged reading of the front rangefinder |
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int temp,distance,kk=5; // kk sets this to 5 readings. |
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distance =0;
|
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for (int i=0; i<kk; i++){ |
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temp = range_read_distance(IR2); |
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if (temp == -1) |
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{ |
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//temp=0;
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i--; |
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} |
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else
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distance+= temp; |
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delay_ms(3);
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} |
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if (kk>0) |
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return (int)(distance/kk); |
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else
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return 0; |
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} |
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|
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/*
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Orients the robot so that it is facing the beacon (or the broadcasting BOM).
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|
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*/
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void correctTurn(void) |
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{ |
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orb1_set_color(BLUE); // BLUE and PURPLE
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left(220);
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while(1) |
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{ |
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int bomNum = 0; // bomNum is the current maximum reading |
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bom_refresh(BOM_ALL); |
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bomNum = bom_get_max(); |
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usb_puti(bomNum); |
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if(bomNum == 4) // when it's turned the right way, stop |
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{ |
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timeout = 0;
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//motor_l_set(1, 200);
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//motor_r_set(1, 200);
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break; // exits the while() loop to stop the method |
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} |
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else // facing the wrong way |
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{ |
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if(bomNum == -1) |
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{ |
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timeout++; |
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|
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if(timeout > 5000) // if it's been looking too long, move a little bit as it turns |
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{ |
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motor_r_set(FORWARD, 210);
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motor_l_set(BACKWARD, 190);
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} |
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} |
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else if((bomNum >= 12) || (bomNum < 4)) |
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{ |
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motor_l_set(FORWARD, 200);
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motor_r_set(BACKWARD, 200);
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timeout = 0;
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} |
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else
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{ |
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motor_l_set(BACKWARD, 200);
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motor_r_set(FORWARD, 200);
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timeout = 0;
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} |
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} |
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} |
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return;
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} |
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|
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/*
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This is supposed to (essentially) do a correct turn, then move forward or something.
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Actually, we should just get rid of this.
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*/
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void correctApproach(void) |
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{ |
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int bomNum = 0; |
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bom_refresh(BOM_ALL); |
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bomNum = bom_get_max(); |
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usb_puti(bomNum); |
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if(bomNum == 4) |
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{ |
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motor_l_set(1, 200); |
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motor_r_set(1, 200); |
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} |
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else
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{ |
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if(bomNum == -1){} |
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else if((bomNum >= 12) || (bomNum < 4)) |
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{ |
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motor_l_set(FORWARD, 200);
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motor_r_set(BACKWARD, 200);
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} |
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else
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{ |
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motor_l_set(BACKWARD, 200);
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motor_r_set(FORWARD, 200);
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} |
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delay_ms(100);
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} |
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} |
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|
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/*
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drives forward a hardcoded distance. May not be useful.
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*/
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void go_straight(void){ |
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forward(200);
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encoder_rst_dx(LEFT); |
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encoder_rst_dx(RIGHT); |
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delay_ms(100);
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int x_left = encoder_get_x(LEFT), x_right = encoder_get_x(RIGHT);
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int count = 0; |
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int d;
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while (count<25){ //count = 25 when bot6; count <12 |
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x_left = encoder_get_x(LEFT); |
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x_right = encoder_get_x(RIGHT); |
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d = x_right-x_left; |
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if (d>13 || d<-13){ |
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if(d<50 && d>-50){ |
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d = round(1.0*d/4); |
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setforward(200+d, 200-d); |
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} |
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} |
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delay_ms(32);
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count++; |
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} |
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} |
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|
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|
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/*
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BLINK the given number times
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*/
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void blink(int num) { |
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for(int i = 0; i<num; i++) |
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{ |
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orb_set_color(ORB_OFF); |
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delay_ms(350);
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orb_set_color(RED); |
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delay_ms(200);
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} |
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orb_set_color(ORB_OFF); |
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} |
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//*****************************************************************************************************************************************************************************************
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/*
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A double state machine. The robot is either an "edge" or a "beacon" depending on the initial potentiometer reading.
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*/
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int main(void) |
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{ |
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/* Initialize dragonfly board */
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dragonfly_init(ALL_ON); |
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/* Initialize the basic wireless library */
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wl_basic_init_default(); |
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/* Set the XBee channel to your assigned channel */ /* Set the XBee channel to your assigned channel */ |
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wl_set_channel(24);
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|
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int sending_counter = 0; |
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int robotid = get_robotid();
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int used[16]; |
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int usedPointer=0; |
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for (int i=0; i<16; i++) used[i] = 0; |
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char send_buffer[2]; |
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int data_length;
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unsigned char *packet_data=wl_basic_do_default(&data_length); |
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int state = EDGE;
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int beacon_State=0; |
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int edge_State=0; |
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int waitingCounter=0; |
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int robotsReceived=0; |
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int offset = 20, time=0; |
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if(wheel()<100) |
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{ |
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state=EDGE; |
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} |
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else
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{ |
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state=BEACON; |
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} |
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int distance=1000; // how far away to stop. |
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int onefoot=250, speed=250; // one foot is 490 for bot 1; one foot is 200 for bot6 |
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while(1) |
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{ |
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bom_refresh(BOM_ALL); |
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|
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/*
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*******TERMinology**************
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EDGE=0 other names: slave. Definition: robots on the edge of the circle;
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BEACON=1 other name: master. Definition: robots in the center of the circle;
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*******EXPECTED MOVES **********
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The designed movement:
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1. one center robot, several edge robots are on;
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2. center robots: button 1 is pressed;
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3. center robots: send global package telling edges that he exists;
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4. EDGE robots response with ACK.
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5. EDGE robots wait for center robots to finish counting (DONE package)
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6. EDGE robtos approach the center robtot and stop at the "onefoot" distance, send message to the center
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*/
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// decide if its is center or not.
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switch(state)
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{ |
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/**********
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if EDGE /slave robots
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*/
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case 0: |
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switch(edge_State)
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{ |
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/*
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0. EDGE robots are on.
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1. They are waiting for ExiST pacakage from the Center robots
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2. After they receive the package, they send ACK package to center.
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3. Wait the center robot to finish counting all EDGE robots
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*/
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case 0: |
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bom_off(); |
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orb1_set_color(YELLOW);orb2_set_color(CYAN); |
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packet_data=wl_basic_do_default(&data_length); |
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if(packet_data != 0 && data_length>=2 && packet_data[0]==CIRCLE_ACTION_EXIST) |
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{ |
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send_buffer[0]=CIRCLE_ACTION_ACK;
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send_buffer[1]=robotid;
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|
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wl_basic_send_global_packet(42,send_buffer,2); |
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edge_State=1;
|
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} |
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break;
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/*
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1. Wait for DONE package
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2. The counting process is DONE
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*/
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case 1: |
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|
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orb_set_color(YELLOW);orb2_set_color(PURPLE); |
381 |
packet_data=wl_basic_do_default(&data_length); |
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//wl_basic_send_global_packet(42,send_buffer,2);
|
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|
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if(packet_data != 0 && data_length>=2 && packet_data[0]==CIRCLE_ACTION_DONE) |
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{ |
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edge_State=2;
|
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} |
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break;
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|
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case 2: |
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// COLOR afer DONE ---> MAGENTA
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orb_set_color(MAGENTA); |
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correctTurn(); // turn to face the beacon
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forward(175);
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//range_init();
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|
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|
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distance = get_distance(); |
399 |
time=0;
|
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while ((distance-offset)>=onefoot || distance==0 || (distance+offset)<onefoot) |
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{ |
402 |
if(distance==0) |
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orb_set_color(WHITE); |
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else if(distance-offset>=onefoot) |
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forward(175);
|
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else
|
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backward(175);
|
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//correctApproach();
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distance = get_distance(); |
410 |
delay_ms(14);
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time+=14;
|
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if(time>500){ |
413 |
correctTurn(); |
414 |
time=0;
|
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} |
416 |
} |
417 |
|
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stop(); |
419 |
orb_set_color(LIME); |
420 |
|
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send_buffer[0]=CIRCLE_ACTION_ACK;
|
422 |
send_buffer[1]=robotid;
|
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wl_basic_send_global_packet(42,send_buffer,2); |
424 |
|
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edge_State=3;
|
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break;
|
427 |
|
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// wait until the beacon sends out its robot ID
|
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/*
|
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// as we don't check distance to center one by one now,
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no more private communication at this point.
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case 3:
|
433 |
orb_set_color(YELLOW);
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orb2_set_color(GREEN);
|
435 |
|
436 |
packet_data=wl_basic_do_default(&data_length);
|
437 |
if(packet_data != 0 && data_length>=2 && packet_data[0]==CIRCLE_ACTION_ACK && packet_data[1]==robotid)
|
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{
|
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bom_on();
|
440 |
orb_set_color(ORANGE);
|
441 |
}
|
442 |
if(packet_data != 0 && data_length>=2 && packet_data[0]==CIRCLE_ACTION_DONE && packet_data[1]==robotid)
|
443 |
{
|
444 |
bom_off();
|
445 |
orb_set_color(YELLOW);
|
446 |
}
|
447 |
break;
|
448 |
*/
|
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} |
450 |
|
451 |
*/ |
452 |
// NEW CODE FROM JOEL
|
453 |
/*
|
454 |
while(1)
|
455 |
{
|
456 |
packet_data = wl_basic_do_default(&data_length);
|
457 |
|
458 |
if(packet_data[0]=='s') stop2=1;
|
459 |
if(packet_data[0]=='a') switch_sending();
|
460 |
|
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if(sending)
|
462 |
{
|
463 |
|
464 |
}
|
465 |
|
466 |
else // recieving
|
467 |
{
|
468 |
|
469 |
if(stop2)
|
470 |
{
|
471 |
motor_l_set(FORWARD,0);
|
472 |
motor_r_set(FORWARD,0);
|
473 |
orb1_set_color(GREEN);
|
474 |
}
|
475 |
|
476 |
else
|
477 |
{
|
478 |
int max_bom = bom_get_max();
|
479 |
/*usb_puts("bom_get_max : ");
|
480 |
usb_puti(max_bom);
|
481 |
usb_puts("/n/r");*/
|
482 |
/*
|
483 |
|
484 |
if(max_bom == 8)
|
485 |
{
|
486 |
orb2_set_color(BLUE);
|
487 |
motor_r_set(FORWARD,180);
|
488 |
motor_l_set(FORWARD,180);
|
489 |
|
490 |
}
|
491 |
else if(max_bom == 7 || max_bom == 6 || max_bom == 5)
|
492 |
{
|
493 |
motor_l_set(FORWARD,180);
|
494 |
motor_r_set(FORWARD,0);
|
495 |
}
|
496 |
else if(max_bom == -1);
|
497 |
else
|
498 |
{
|
499 |
orb2_set_color(GREEN);
|
500 |
motor_l_set(FORWARD,0);
|
501 |
motor_r_set(FORWARD,180);
|
502 |
}
|
503 |
}
|
504 |
|
505 |
}
|
506 |
|
507 |
delay_ms(10);
|
508 |
|
509 |
} //end while
|
510 |
*/
|
511 |
//break;
|
512 |
|
513 |
// END for EDGE robots
|
514 |
|
515 |
|
516 |
|
517 |
|
518 |
|
519 |
|
520 |
|
521 |
//*****************************************************************************************************************************************************************************************
|
522 |
|
523 |
|
524 |
|
525 |
|
526 |
|
527 |
|
528 |
|
529 |
/*
|
530 |
The CENTER/BEACON/MASTER robot
|
531 |
*/
|
532 |
case 1: // BEACON /master /enter robots |
533 |
switch(beacon_State) {
|
534 |
/*
|
535 |
0. center robots on wait for pressing button 1
|
536 |
*/
|
537 |
case 0: |
538 |
bom_on(); |
539 |
orb_set_color(PURPLE); |
540 |
if(button1_click()) beacon_State=1; |
541 |
break;
|
542 |
/*
|
543 |
1. Send EXIST package to EDGE robots
|
544 |
*/
|
545 |
case 1: // sends a global exist packet to see how many robots there are |
546 |
orb_set_color(RED); |
547 |
send_buffer[0]=CIRCLE_ACTION_EXIST;
|
548 |
send_buffer[1]=get_robotid();
|
549 |
wl_basic_send_global_packet(42,send_buffer,2); |
550 |
usedPointer = 0;
|
551 |
beacon_State=2;
|
552 |
// wait for the edge to send for 1sec.
|
553 |
delay_ms(1000);
|
554 |
break;
|
555 |
/*
|
556 |
2. Count the number of the EDGE robots
|
557 |
*******NOTE: at most 1500 times of loop ******
|
558 |
*/
|
559 |
case 2: |
560 |
waitingCounter++; |
561 |
orb1_set_color(YELLOW); |
562 |
orb2_set_color(BLUE); |
563 |
packet_data=wl_basic_do_default(&data_length); |
564 |
|
565 |
if(packet_data!=0 && data_length>=2 && packet_data[0]==CIRCLE_ACTION_ACK) |
566 |
{ |
567 |
orb_set_color(RED); |
568 |
orb2_set_color(BLUE); |
569 |
//only add to robots seen if you haven't gotten an ACK from this robot
|
570 |
if(used[packet_data[1]]==0){ |
571 |
robotsReceived++; |
572 |
used[usedPointer] = packet_data[1];
|
573 |
usedPointer++; |
574 |
|
575 |
usb_puts("Added: ");
|
576 |
usb_puti(packet_data[1]);
|
577 |
usb_puts("\r\n");
|
578 |
} |
579 |
} |
580 |
if(waitingCounter >= 2000){ |
581 |
beacon_State=3;
|
582 |
} |
583 |
break;
|
584 |
/*
|
585 |
COUNTing is DONE.
|
586 |
Sending DONE package.
|
587 |
*/
|
588 |
case 3: |
589 |
blink(robotsReceived); |
590 |
orb_set_color(GREEN); |
591 |
send_buffer[0]=CIRCLE_ACTION_DONE;
|
592 |
wl_basic_send_global_packet(42,send_buffer,2); |
593 |
beacon_State=4;
|
594 |
break;
|
595 |
/*
|
596 |
Wait for all the robots to get to right distance/position
|
597 |
*/
|
598 |
case 4: |
599 |
orb1_set_color(YELLOW); |
600 |
orb2_set_color(WHITE); |
601 |
|
602 |
int numOk = 0; |
603 |
|
604 |
while(numOk<robotsReceived)
|
605 |
{ |
606 |
packet_data=wl_basic_do_default(&data_length); |
607 |
if(packet_data!=0 && data_length>=2 && packet_data[0]==CIRCLE_ACTION_ACK) |
608 |
{ |
609 |
numOk++; |
610 |
} |
611 |
} |
612 |
|
613 |
beacon_State = 5;
|
614 |
break;
|
615 |
|
616 |
/**
|
617 |
TODO: no need for "private" communication if we don't check distance one by one
|
618 |
So comment out this part at least for now.
|
619 |
|
620 |
Starts repositioning the edge robots one by one
|
621 |
*/
|
622 |
/* case 5:
|
623 |
orb_set_color(MAGENTA);
|
624 |
bom_off();
|
625 |
for(int i=0; i<robotsReceived; i++)
|
626 |
|
627 |
{
|
628 |
usb_puts("used = ");
|
629 |
usb_puti(used[i]);
|
630 |
usb_puts("\r\n");
|
631 |
send_buffer[0]=CIRCLE_ACTION_ACK;
|
632 |
send_buffer[1]=used[i];
|
633 |
wl_basic_send_global_packet(42,send_buffer,2);
|
634 |
|
635 |
delay_ms(1000);
|
636 |
|
637 |
send_buffer[0]=CIRCLE_ACTION_DONE;
|
638 |
send_buffer[1]=used[i];
|
639 |
wl_basic_send_global_packet(42,send_buffer,2);
|
640 |
|
641 |
delay_ms(1000);
|
642 |
}
|
643 |
*/
|
644 |
|
645 |
/*orb_set_color(BLUE);
|
646 |
// clock for switching the BOMs between the master and slave
|
647 |
if(sending_counter++>4)
|
648 |
{
|
649 |
switch_sending();
|
650 |
sending_counter = 0;
|
651 |
send_buffer[0] = 'a';
|
652 |
wl_basic_send_global_packet(42, send_buffer, 1);
|
653 |
}
|
654 |
|
655 |
|
656 |
if(sending)
|
657 |
{
|
658 |
|
659 |
}
|
660 |
|
661 |
else // recieving
|
662 |
{
|
663 |
int max_bom = bom_get_max();
|
664 |
usb_puts("bom_get_max : ");
|
665 |
usb_puti(max_bom);
|
666 |
usb_puts("\n\r");
|
667 |
|
668 |
if(max_bom == desired_max_bom)
|
669 |
{
|
670 |
// only stops the slave if two consecutive boms
|
671 |
// reading give the desired bom as the max one. Filters the noise.
|
672 |
if(bom_max_counter)
|
673 |
{
|
674 |
send_buffer[0] = 's';
|
675 |
wl_basic_send_global_packet(42, send_buffer, 2);
|
676 |
}
|
677 |
bom_max_counter =1;
|
678 |
}
|
679 |
else bom_max_counter = 0;
|
680 |
|
681 |
}
|
682 |
*/
|
683 |
//break;
|
684 |
} |
685 |
} |
686 |
} |
687 |
|
688 |
orb_set_color(RED); |
689 |
while(1); /* END HERE */ |
690 |
|
691 |
//return 0;
|
692 |
} |