hi. how to move ankle servo since all ankles servo not running of my quadruped robot. bellow is my code. and thank you for any help
#include <Servo.h>
#include <math.h>
// Define servo objects
Servo hipServo1, kneeServo1, ankleServo1;
Servo hipServo2, kneeServo2, ankleServo2;
Servo hipServo3, kneeServo3, ankleServo3;
Servo hipServo4, kneeServo4, ankleServo4;
// Constants for leg dimensions (lengths in millimeters)
const float femurLength = 50.0;
const float tibiaLength = 70.0;
const float coxaLength = 30.0;
// Variables for joint angles
float hipAngle, kneeAngle, ankleAngle;
// Time variables for sinusoidal function
unsigned long startTime;
const float stepDuration = 1000.0; // Time for one step in milliseconds
void setup() {
// Attach servos to respective pins
// int servoPins[numServos] = {42, 13, 7, 45, 46, 47, 48, 25,50, 51, 33, 53}; // Replace with your actual pin numbers
hipServo1.attach(42);
kneeServo1.attach(13);
ankleServo1.attach(7);
hipServo2.attach(45);
kneeServo2.attach(46);
ankleServo2.attach(47);
hipServo3.attach(48);
kneeServo3.attach(25);
ankleServo3.attach(50);
hipServo4.attach(51);
kneeServo4.attach(33);
ankleServo4.attach(53);
// Set initial leg positions
resetLegs();
startTime = millis();
}
void loop() {
// Calculate the elapsed time since the last step
unsigned long elapsedTime = millis() - startTime;
// Move all legs forward in a sinusoidal pattern
moveLeg(hipServo1, kneeServo1, ankleServo1, sinMovement(elapsedTime));
moveLeg(hipServo2, kneeServo2, ankleServo2, sinMovement(elapsedTime));
moveLeg(hipServo3, kneeServo3, ankleServo3, sinMovement(elapsedTime));
moveLeg(hipServo4, kneeServo4, ankleServo4, sinMovement(elapsedTime));
// If one step is completed, reset the start time
if (elapsedTime > stepDuration) {
startTime = millis();
}
}
void moveLeg(Servo hip, Servo knee, Servo ankle, float hipOffset) {
// Calculate servo angles using inverse kinematics with sinusoidal function
inverseKinematics(hipOffset, -45, 0); // targetHip, targetKnee, targetAnkle
// Move servos to the calculated angles
hip.write(hipAngle);
knee.write(kneeAngle);
ankle.write(ankleAngle);
}
float sinMovement(unsigned long elapsedTime) {
// Use a sinusoidal function to generate hip joint movement
float period = 2 * PI * elapsedTime / stepDuration;
return 30 * sin(period); // Adjust amplitude and frequency for desired motion
}
void inverseKinematics(float targetHip, float targetKnee, float targetAnkle) {
// Implement inverse kinematics equations here
// This can vary depending on your robot's leg structure
// For a simple example, you can use trigonometric functions
// Calculate joint angles using trigonometry
hipAngle = atan2(-femurLength * sin(targetHip), femurLength * cos(targetHip) - coxaLength) * RAD_TO_DEG;
kneeAngle = atan2(femurLength * sin(targetHip), femurLength * cos(targetHip) - coxaLength - tibiaLength) * RAD_TO_DEG;
ankleAngle = targetAnkle; // Assuming direct control of ankle angle
}
void resetLegs() {
// Reset all legs to their initial positions
moveLeg(hipServo1, kneeServo1, ankleServo1, 0);
moveLeg(hipServo2, kneeServo2, ankleServo2, 0);
moveLeg(hipServo3, kneeServo3, ankleServo3, 0);
moveLeg(hipServo4, kneeServo4, ankleServo4, 0);
delay(100); // Delay for stability
}
