cannon ball
Dependencies: SerialDriver Servo mbed-rtos mbed
Fork of Nucleo_ServoKnob by
Diff: main.cpp
- Revision:
- 1:dee6f3e0db9b
- Parent:
- 0:3a3bfe92df7c
- Child:
- 2:a5e166306da7
diff -r 3a3bfe92df7c -r dee6f3e0db9b main.cpp --- a/main.cpp Fri Sep 19 15:26:02 2014 +0000 +++ b/main.cpp Tue Apr 07 19:46:52 2015 +0000 @@ -1,19 +1,174 @@ +/****************************************************** +* Project CONNONBALL using NUCLEO STM32F401RE Year 2015 +* @author Malek MAMMAR +* @mail malek.mammar@gmail.com +*******************************************************/ + #include "mbed.h" #include "Servo.h" +/* --> myservo.calibrate(0.00095, 90.0); // Calibrate the servo + Le 0.00095 est l'ecart max entre la valeur 1.5ms qui correspond a une angle de 90 degrés : Pour ce deplacer de 0 à 180 degré on set le range + a de 1.5-0.95 ms à 1.5+0.95 ms. + La fonction position permet de positionner de facon relative a 1.5ms (90°) donc les valeurs permise sont de l'ordre -90 et +90 + RMQ un simple position(0) permet de mettre le servo a l'angle 90°, position(-90°) = -90°, position(0°) = 0°, position(+90°) = +90° + La fonction write(percent) est identique mais en terme de pouventages avec write(0)=-90°, write(0.5%) = 90°, write(1)=+90° + */ + +Servo steering(D5); +Servo throttle(D6); +Serial usb(USBTX, USBRX); +//Serial usb(USBTX, USBRX, 1024, 512); +DigitalOut led(LED1); + +unsigned char steeringUSB = 95; +unsigned char throttleUSB = 91; + +unsigned int time_data_check = 0; +unsigned int time_data_check_last = 0; +#define DEBUG 0 +#define signal 255 +#define throttle_stop_ms 1.5 +#define steering_right_deg 0 + +Timer timer; + + +void setup (); +void loop(); +void loopTest(); //A test for understanding how the servos work +void emergencyCall(); +void releaseSignal(); //Waits for the pc signal value +void writeThrottle(float value); +void writeSteering(float value); + int main() { - Servo myservo(D3); // Create the servo object - AnalogIn knob(A0); // Create the analog input object - - float val; + setup(); - myservo.calibrate(0.00095, 90.0); // Calibrate the servo + while(1) + loop(); +} + + +void setup () { + usb.baud(115200); + steering.calibrate(0.0005, 90.0); //!\\ Calibrate the servo : essayer 45.0° a la place de 90.0° + led = false; + releaseSignal(); //waits for the release signal from the pc + timer.start(); + time_data_check = timer.read_ms(); +} + +void loop() { + + if (usb.readable()) { + if (DEBUG) + led = true; + steeringUSB = usb.getc(); + //writeSteering(steeringUSB); + steering.position(steeringUSB - 95); + //usb.putc(steeringUSB); + // time_data_check_last = time_data_check; + //time_data_check = timer.read_ms(); + if (DEBUG) { + // wait_ms(2000); + led = false; + } + //} + //if (usb.readable()) { + if (DEBUG) + led = true; + throttleUSB = usb.getc(); + writeThrottle(throttleUSB); + //usb.putc(throttleUSB); + + time_data_check_last = time_data_check; + time_data_check = timer.read_ms(); + + + + if (DEBUG) { + // wait_ms(2000); + led = false; + } + } - while(1) - { - val = knob.read(); // Reads the value of the potentiometer (value between 0 and 1) - myservo.write(val); // Sets the servo position according to the scaled value (0-1) - wait_ms(15); // Waits for the servo to get there + //steering.position(steeringUSB - 95); + //writeThrottle(throttleUSB); + //emergencyCall(); + if(DEBUG){ + //wait_ms(2000); + } + wait_ms(50); +} + +void emergencyCall() { + int deltaTime = (DEBUG)? 10000 : 2000; + if (time_data_check_last - time_data_check > deltaTime) { + led = true; + while (1) { + throttleUSB = 91; + //steeringUSB = 95; + writeThrottle(throttleUSB); + //steering.write_ms(steering_right_ms); + //throttle.write_ms(steering_right_deg); + if (usb.readable() && usb.getc()==255) { //Release signal + led = false; + wait_ms(1000); + return; + } + } } } + +void writeSteering(float value) { + //Par rapport au code arduino : 40 à 96 (gauche) et de 96 à 140 (vers la droite) + //float _steeringRange = 140 - 40; + //write((steering/_steeringRange) + 0.5); //ratio de l'angle + 0.5 pour l'adapter a la fonction write ci dessus + steering.position(value - 96); //96 correspond a un angle droit des roues (code arduino), ce qui correspond ici a 0° +} + +void writeThrottle(float value) { + //Par rapport au code arduino : point mort à 91 et pour la vitesse min = 40 et max = 180 + //on utilise les valeur 86, 88, 89 + // Throttle pulsewidth : for a pulsewitdh >=1.5 ms or <0.75 ms the car stops + //float _throttleRange = 90-20; //? not sure about the range yet + if (value == 91) + throttle.write_ms(1.5); + else if (value == 90) + throttle.write_ms(1.49); + else if ( value == 89 ) + throttle.write_ms(1.48); + else if ( value == 88 ) + throttle.write_ms(1.47); + else if ( value == 86 ) + throttle.write_ms(1.46); +} + +void releaseSignal() { + while (1) { + if (usb.readable() && usb.getc()==255) { //Release signal + led = false; + return; + } + } +} + + +void loopTest() { +/* //Test de la direction : les valeurs sont comprises entre 1.0 (gauche) et 2.0 (droite) + for(val=1.0; val<=2.0; val+=0.1){ + steering.write_ms(val); + wait_ms(1000); + } + + //Test de l'acceleration : les valeurs sont comprises entre 0.75 (rapide) a 1.49 (lentement). + //Sachant qu'au-dessous de 1.0 (ie < 1.0) la vitesse semble être deja a son max. + //Remarque : l'appel a pwm.pulsewidth_ms() n'induit peut être pas le même comprtement --> se limiter a pwm.pulsewith(x/1000) + for(val=1.5; val<=1.0; val-=0.01){ + throttle.write_ms(val); + wait_ms(1000); + } +*/ +} \ No newline at end of file