foc/arduino/main/main.ino

  /**
Deng's FOC 闭环速度控制例程 测试库：SimpleFOC 2.1.1 测试硬件：灯哥开源FOC V1.0
在串口窗口中输入：T+速度，就可以使得两个电机闭环转动
比如让两个电机都以 10rad/s 的速度转动，则输入：T10
在使用自己的电机时，请一定记得修改默认极对数，即 BLDCMotor(7) 中的值，设置为自己的极对数数字
程序默认设置的供电电压为 16.8V,用其他电压供电请记得修改 voltage_power_supply , voltage_limit 变量中的值
默认PID针对的电机是 GB6010 ，使用自己的电机需要修改PID参数，才能实现更好效果
 */
#include <SimpleFOC.h>
#include <WiFi.h>
#include <AsyncUDP.h> //引用以使用异步UDP
#include <Kalman.h> // Source: https://github.com/TKJElectronics/KalmanFilter
Kalman kalmanZ;
#define gyroZ_OFF -0.72
/* ----IMU Data---- */
float PID_P = 8; //
float PID_I = 0; //
float PID_D = 0; //
double accX, accY, accZ;
double gyroX, gyroY, gyroZ;
int16_t tempRaw;

double gyroZangle; // Angle calculate using the gyro only
double compAngleZ; // Calculated angle using a complementary filter
double kalAngleZ;  // Calculated angle using a Kalman filter

uint32_t timer;
uint8_t i2cData[14]; // Buffer for I2C data
/* ----FOC Data---- */

// driver instance
double acc2rotation(double x, double y);

const char *ssid = "esp32";
const char *password = "12345678";


AsyncUDP udp;                     //创建UDP对象
unsigned int localUdpPort = 2333; //本地端口号
unsigned int broadcastPort = localUdpPort;

MagneticSensorI2C sensor = MagneticSensorI2C(AS5600_I2C);

TwoWire I2Ctwo = TwoWire(1);

//倒立摆参数
float LQR_K1 = 200;  //摇摆到平衡
float LQR_K2 = 15;   //
float LQR_K3 = 0.15; //

//电机参数
BLDCMotor motor = BLDCMotor(5);
BLDCDriver3PWM driver = BLDCDriver3PWM(32, 33, 25, 22);


//命令设置
int target_velocity = 0;
int target_angle = 149;
void onPacketCallBack(AsyncUDPPacket packet)
{
  target_velocity = atoi((char*)(packet.data()));
  Serial.print("数据内容: ");
  Serial.println(target_velocity);
//  packet.print("reply data");
}

void setup() {
   Serial.begin(115200);

  
    // kalman mpu6050 init
  Wire.begin(19, 18,400000);// Set I2C frequency to 400kHz
  i2cData[0] = 7;    // Set the sample rate to 1000Hz - 8kHz/(7+1) = 1000Hz
  i2cData[1] = 0x00; // Disable FSYNC and set 260 Hz Acc filtering, 256 Hz Gyro filtering, 8 KHz sampling
  i2cData[2] = 0x00; // Set Gyro Full Scale Range to ±250deg/s
  i2cData[3] = 0x00; // Set Accelerometer Full Scale Range to ±2g
  while (i2cWrite(0x19, i2cData, 4, false))
    ; // Write to all four registers at once
  while (i2cWrite(0x6B, 0x01, true))
    ; // PLL with X axis gyroscope reference and disable sleep mode

  while (i2cRead(0x75, i2cData, 1))
    ;
  if (i2cData[0] != 0x68)
  { // Read "WHO_AM_I" register
    Serial.print(F("Error reading sensor"));
    while (1)
      ;
  }

  delay(100); // Wait for sensor to stabilize

  /* Set kalman and gyro starting angle */
  while (i2cRead(0x3B, i2cData, 6))
    ;
  accX = (int16_t)((i2cData[0] << 8) | i2cData[1]);
  accY = (int16_t)((i2cData[2] << 8) | i2cData[3]);
  accZ = (int16_t)((i2cData[4] << 8) | i2cData[5]);
  double pitch = acc2rotation(accX, accY);

  kalmanZ.setAngle(pitch);
  gyroZangle = pitch;

  timer = micros();
  Serial.println("kalman mpu6050 init");

    //wifi初始化
  WiFi.mode(WIFI_AP);
   while(!WiFi.softAP(ssid, password)){}; //启动AP
    Serial.println("AP启动成功");
  while (!udp.listen(localUdpPort)) //等待udp监听设置成功
  {
  }
  udp.onPacket(onPacketCallBack); //注册收到数据包事件
  
  I2Ctwo.begin(23, 5, 400000);   //SDA,SCL
  sensor.init(&I2Ctwo);

  //连接motor对象与传感器对象
  motor.linkSensor(&sensor);

  //供电电压设置 [V]
  driver.voltage_power_supply = 12;
  driver.init();

  //连接电机和driver对象
  motor.linkDriver(&driver);

  //FOC模型选择
  motor.foc_modulation = FOCModulationType::SpaceVectorPWM;

  //运动控制模式设置
  motor.controller = MotionControlType::velocity;

  //速度PI环设置
  motor.PID_velocity.P = 1.5;
  motor.PID_velocity.I = 20;

  //最大电机限制电机
  motor.voltage_limit = 12;

  //速度低通滤波时间常数
  motor.LPF_velocity.Tf = 0.01;

  //设置最大速度限制
  motor.velocity_limit = 40;

  motor.useMonitoring(Serial);
  
  //初始化电机
  motor.init();

  //初始化 FOC
  motor.initFOC();

  Serial.println(F("Motor ready."));
  Serial.println(F("Set the target velocity using serial terminal:"));


}
char s[255];
int t_v;
int lim_v = 20;
void loop() {
  while (i2cRead(0x3B, i2cData, 14));
    accX = (int16_t)((i2cData[0] << 8) | i2cData[1]);
    accY = (int16_t)((i2cData[2] << 8) | i2cData[3]);
    accZ = (int16_t)((i2cData[4] << 8) | i2cData[5]);
    tempRaw = (int16_t)((i2cData[6] << 8) | i2cData[7]);
    gyroX = (int16_t)((i2cData[8] << 8) | i2cData[9]);
    gyroY = (int16_t)((i2cData[10] << 8) | i2cData[11]);
    gyroZ = (int16_t)((i2cData[12] << 8) | i2cData[13]);
    
    double dt = (double)(micros() - timer) / 1000000; // Calculate delta time
    timer = micros();
    
    double pitch = acc2rotation(accX, accY);
    double gyroZrate = gyroZ / 131.0; // Convert to deg/s

    kalAngleZ = kalmanZ.getAngle(pitch, gyroZrate + gyroZ_OFF, dt);
    gyroZangle += (gyroZrate + gyroZ_OFF) * dt;
    compAngleZ = 0.93 * (compAngleZ + (gyroZrate + gyroZ_OFF) * dt) + 0.07 * pitch;

    // Reset the gyro angle when it has drifted too much
    if (gyroZangle < -180 || gyroZangle > 180)
      gyroZangle = kalAngleZ;
      
  sprintf(s, "%.2f",kalAngleZ); //将100转为16进制表示的字符串
//  target_velocity = -angle_pid(kalAngleZ);
//  if (abs(target_velocity)>lim_v)
//    target_velocity = -target_velocity;
//  if (target_velocity >lim_v)
//    target_velocity = lim_v;
//  if (target_velocity<-lim_v)
//    target_velocity = -lim_v;

  Serial.print(motor.shaft_velocity);Serial.print("\t");
  Serial.print(target_velocity);Serial.print("\t");
  Serial.print(target_angle);Serial.print("\t");
  Serial.print(kalAngleZ);Serial.print("\t");
  Serial.print("\r\n");
  motor.loopFOC();
  motor.move(target_velocity);
  //可以使用该方法广播信息
  IPAddress broadcastAddr((~(uint32_t)WiFi.subnetMask())|((uint32_t)WiFi.localIP())); //计算广播地址
  udp.writeTo((const unsigned char*)s, strlen(s), broadcastAddr, localUdpPort); //广播数据
}
/* mpu6050加速度转换为角度
            acc2rotation(ax, ay)
            acc2rotation(az, ay) */
double acc2rotation(double x, double y)
{
  if (y < 0)
  {
    return atan(x / y) / 1.570796 * 90 + 180;
  }
  else if (x < 0)
  {
    return (atan(x / y) / 1.570796 * 90 + 360);
  }
  else
  {
    return (atan(x / y) / 1.570796 * 90);
  }
}

unsigned long lastTime;
double errSum, lastErr;
int angle_pid(double now_angle)
{
   /*How long since we last calculated*/
   unsigned long now = millis();
   double timeChange = (double)(now - lastTime);
  
   /*Compute all the working error variables*/
   double error = target_angle-now_angle;
   errSum += (error * timeChange);
   double dErr = (error - lastErr) / timeChange;
  
   /*Compute PID Output*/
   int Output = PID_P * error + PID_I * errSum + PID_D * dErr;
  
   /*Remember some variables for next time*/
   lastErr = error;
   lastTime = now;
   return Output;
}