Basic funcitonality
Dependencies: mbed mbed-rtos SevenSegmentSerial HC_SR04_Ultrasonic_Library
main.cpp
- Committer:
- dtran76
- Date:
- 2021-04-30
- Revision:
- 8:88cf71c84e04
- Parent:
- 7:04c8f6b7a42a
File content as of revision 8:88cf71c84e04:
//****************************************************** // Mbed to Raspberry Pi ** Raspberry Pi to Mbed * //****************************************************** // 0 - start line, lap 1 ** S - start race * // 1 - cp1, lap 1 ** R - reset * // 2 - cp2, lap 2 ** * // 3 - start line, lap 2 ** * // ... ** * // 9 - end race ** * //****************************************************** #include "mbed.h" #include "ultrasonic.h" #include "rtos.h" Thread thread1; Thread thread2; Serial pc(USBTX,USBRX); DigitalOut led1(p6); DigitalOut led2(p7); PwmOut speaker(p25); DigitalOut rgbRed(p23); DigitalOut rgbGreen(p24); DigitalOut rgbCtrl1(p8); DigitalOut rgbCtrl2(p9); DigitalOut rgbCtrl3(p10); #define B4NOTE 500 //Hz #define E5NOTE 659 //Hz int width[3]; //width of each checkpoint, mm int threshold[3]; //how much distance has to change, mm float sensitivity[3] = {0.1,0.1,0.1}; int setup[3] = {1,1,1}; int total_laps = 3; int current_lap = 0; bool early_start = 0; bool start_done = 0; //state machine, tracks current position in track enum state_type {start,past_start,past_cp1,past_cp2}; state_type track_state = start; //Mbed reset extern "C" void mbed_reset(); //Starting countdown void start_race() { // 3 rgbRed = 1; speaker.period(1.0/B4NOTE); speaker =0.5; rgbCtrl1 = 1; Thread::wait(500); speaker = 0; Thread::wait(500); // 2 speaker =0.5; rgbCtrl2 = 1; Thread::wait(500); speaker = 0; Thread::wait(500); // 1 speaker =0.5; rgbCtrl3 = 1; Thread::wait(500); speaker = 0; Thread::wait(500); // GO! rgbRed = 0; rgbGreen = 1; start_done = 1; speaker.period(1.0/E5NOTE); speaker =0.5; Thread::wait(1000); speaker = 0; rgbCtrl1 = 0; rgbCtrl2 = 0; rgbCtrl3 = 0; } //plays for crossing finish line and checkpoints void play_audio() { speaker.period(1.0/B4NOTE); //500hz period speaker =0.5; //50% duty cycle - max volume Thread::wait(150); speaker=0.0; //turn off audio } //executed when crossing starting line void start_line(int distance) { //calibration if (setup[0]) { width[0] = distance; threshold[0] = distance*sensitivity[0]; setup[0] = !setup[0]; } if (width[0] - distance >= threshold[0]) { led1 = 0; led2 = 0; current_lap++; track_state = past_start; pc.putc('0' + (current_lap*total_laps) - 3); thread1.start(&play_audio); } } //executed when passing checkpoint 1 void checkpoint1(int distance) { if (setup[1]) { width[1] = distance; threshold[1] = distance*sensitivity[1]; setup[1] = !setup[1]; } if (width[1] - distance >= threshold[1]) { led1 = 1; track_state = past_cp1; pc.putc('0' + (current_lap*total_laps) - 2); thread1.start(&play_audio); } } //executed when passing checkpoint 2 void checkpoint2(int distance) { if (setup[2]) { width[2] = distance; threshold[2] = distance*sensitivity[2]; setup[2] = !setup[1]; } if (width[2] - distance >= threshold[2]) { led2 = 1; track_state = past_cp2; pc.putc('0' + (current_lap*total_laps) - 1); thread1.start(&play_audio); } } ultrasonic sonar0(p15,p16,0.1,0.1,&start_line); //starting line ultrasonic sonar1(p17,p18,0.1,0.1,&checkpoint1); //checkpoint 1 ultrasonic sonar2(p21,p22,0.1,0.1,&checkpoint2); //checkpoint 2 int main() { //sonar initialization sonar0.startUpdates(); sonar1.startUpdates(); sonar2.startUpdates(); //sonar calibration sonar0.checkDistance(); sonar1.checkDistance(); sonar2.checkDistance(); //wait for start char from PC while (1) { if (pc.getc() == 'S') { break; } Thread::wait(50); } //starting countdown sequence thread2.start(&start_race); //false start detect while(!start_done) { if (current_lap) { rgbCtrl1 = rgbCtrl2 = rgbCtrl3 = 0; led1 = led2 = 0; rgbRed = 1; rgbGreen = 0; speaker.period(1/B4NOTE); bool other = true; //true every other interation, used to turn speaker on/off while (1) { rgbCtrl1 = !rgbCtrl1; rgbCtrl2 = !rgbCtrl2; rgbCtrl3 = !rgbCtrl3; led1 = !led1; led2 = !led2; speaker = other ? 0.5 : 0.0; other = !other; //check for reset char if (pc.getc() == 'R') { mbed_reset(); } Thread::wait(200); } } Thread::wait(50); } while(1) { switch (track_state) { case start: sonar0.checkDistance(); break; case past_start: sonar1.checkDistance(); break; case past_cp1: sonar2.checkDistance(); break; case past_cp2: sonar0.checkDistance(); break; } if (current_lap > total_laps) { pc.putc('9'); //wait for reset char while(1) { if (pc.getc() == 'R') { mbed_reset(); } Thread::wait(50); } } //check for reset char if (pc.getc() == 'R') { mbed_reset(); } Thread::wait(50); } }