File content as of revision 0:0846fa975a83:

#include "mbed.h"
#include <ros.h>
#include <geometry_msgs/Twist.h>
#include <geometry_msgs/Vector3.h>

//The number will be compiled as type "double" in default
//Add a "f" after the number can make it compiled as type "float"
#define Ts 0.01f    //period of timer1 (s)
#define Kp 0.006f
#define Ki 0.02f

Ticker timer1;
// servo motor
PwmOut servo_cmd(A0);
// DC motor
PwmOut pwm1(D7);
PwmOut pwm1n(D11);
PwmOut pwm2(D8);
PwmOut pwm2n(A3);

// Motor1 sensor
InterruptIn HallA(A1);
InterruptIn HallB(A2);
// Motor2 sensor
InterruptIn HallA_2(D13);
InterruptIn HallB_2(D12);

// 函式宣告
void init_IO();
void init_TIMER();
void timer1_ITR();
void init_CN();
void CN_ITR();
void init_PWM();

// servo motor
float servo_duty = 0.025;  // 0.069 +(0.088/180)*angle, -90<angle<90
// 90度->duty=0.025; 0度->duty=0.069; -90度->duty=0.113
int angle = 0;
int counter;


// Hall sensor
int HallA_1_state = 0;
int HallB_1_state = 0;
int state_1 = 0;
int state_1_old = 0;
int HallA_2_state = 0;
int HallB_2_state = 0;
int state_2 = 0;
int state_2_old = 0;

int c = 0; 
int d = 0; 

// DC motor rotation speed control
int speed_count_1 = 0;
float rotation_speed_1 = 0.0;
float rotation_speed_ref_1 = 0;
float pwm1_duty = 0.5;
float PI_out_1 = 0.0;
float err_1 = 0.0;
float ierr_1 = 0.0;
int speed_count_2 = 0;
float rotation_speed_2 = 0.0;
float rotation_speed_ref_2 = 0;
float pwm2_duty = 0.5;
float PI_out_2 = 0.0;
float err_2 = 0.0;
float ierr_2 = 0.0;

//rosserial
ros::NodeHandle nh;

geometry_msgs::Twist vel_msg;
ros::Publisher p("feedback_wheel_angularVel", &vel_msg);

void messageCallback(const geometry_msgs::Vector3 &msg_receive)
{
    rotation_speed_ref_1 = -msg_receive.x;
    rotation_speed_ref_2 = msg_receive.y;
}

ros::Subscriber<geometry_msgs::Vector3> s("cmd_wheel_angularVel",messageCallback);

int main()
{
    init_TIMER();
    init_PWM();
    init_CN();
    
    nh.initNode();
    nh.subscribe(s);
    nh.advertise(p);

    while(1) 
    {
        vel_msg.linear.x = rotation_speed_ref_1;
        vel_msg.linear.y = rotation_speed_1;
        vel_msg.linear.z = 0;
        
        vel_msg.angular.x = rotation_speed_ref_2;
        vel_msg.angular.y = rotation_speed_2;
        vel_msg.angular.z = 0;
        
        p.publish(&vel_msg);
        
        nh.spinOnce();
        wait_ms(20);
    }
}

void init_TIMER()
{
    timer1.attach_us(&timer1_ITR, 10000.0); // the address of the function to be attached (timer1_ITR) and the interval (10000 micro-seconds)
}

void init_PWM()
{
    servo_cmd.period_ms(20);
    servo_cmd.write(servo_duty);

    pwm1.period_us(50);
    pwm1.write(0.5);
    TIM1->CCER |= 0x4;

    pwm2.period_us(50);
    pwm2.write(0.5);
    TIM1->CCER |= 0x40;
}
void init_CN()
{
    HallA.rise(&CN_ITR);
    HallA.fall(&CN_ITR);
    HallB.rise(&CN_ITR);
    HallB.fall(&CN_ITR);

    HallA_2.rise(&CN_ITR);
    HallA_2.fall(&CN_ITR);
    HallB_2.rise(&CN_ITR);
    HallB_2.fall(&CN_ITR);
}

void CN_ITR()
{
    // motor1
    HallA_1_state = HallA.read();
    HallB_1_state = HallB.read();

    ///code for state determination///

   state_1 = 10*HallA_1_state + HallB_1_state;   //state = AB (ex:A=1,B=0, state_1 = 10)
   
   if(state_1_old != state_1)
   { 
        if((state_1_old/10) == (state_1_old%10))
        {
            if((state_1%10) != (state_1_old%10))
            {
                speed_count_1++;
            }
            else if((state_1/10) != (state_1_old/10))
            {
                speed_count_1--;
            }
        }
        else if((state_1_old/10) != (state_1_old%10))
        {
            if((state_1%10) != (state_1_old%10))
            {
                speed_count_1--;
            }
            else if((state_1/10) != (state_1_old/10))
            {
                speed_count_1++;
            }    
        }
    
        state_1_old = state_1;
    }
   

    //////////////////////////////////

    //forward : speed_count_1 + 1
    //backward : speed_count_1 - 1


    // motor2
    HallA_2_state = HallA_2.read();
    HallB_2_state = HallB_2.read();

    ///code for state determination///

   state_2 = 10*HallA_2_state + HallB_2_state;   //state = AB (ex:A=1,B=0, state_1 = 10)
    
    if(state_2_old != state_2)
    {
        if((state_2_old/10) == (state_2_old%10))
        {
            if((state_2%10) != (state_2_old%10))
            {
                speed_count_2++;
            }
            else if((state_2/10) != (state_2_old/10))
            {
                speed_count_2--;
            }
        }
        else if((state_2_old/10) != (state_2_old%10))
        {
            if((state_2%10) != (state_2_old%10))
            {
                speed_count_2--;
            }
            else if((state_2/10) != (state_2_old/10))
            {
                speed_count_2++;
            }    
        }
    
        state_2_old = state_2;
    }
   

 
    //////////////////////////////////

    //forward : speed_count_2 + 1
    //backward : speed_count_2 - 1
}

void timer1_ITR()
{
    // servo motor
    ///code for sevo motor///
    
       counter = counter + 1;
    
    if(counter == 100)    
    {
        servo_duty = 0.069;       
    }
    if(counter == 200)    
    {
        servo_duty = 0.0763;        
    }
    if(counter == 300)    
    {
        servo_duty = 0.0837;        
    }
    if(counter == 400)    
    {
        servo_duty = 0.091;        
    }
    if(counter == 500)    
    {
        servo_duty = 0.0983;         
    }
    if(counter == 600)    
    {
        servo_duty = 0.106;     
    }      
 
    if(counter == 700)
    {
        servo_duty = 0.113;
    }
     if(counter > 700)
    {
      counter=0;
    }
    
    servo_cmd.write(servo_duty);
    
    
    /////////////////////////
    
    if(servo_duty >= 0.113f)servo_duty = 0.113;
    else if(servo_duty <= 0.025f)servo_duty = 0.025;
    servo_cmd.write(servo_duty);

    // motor1
    rotation_speed_1 = (float)speed_count_1 * 100.0f / 12.0f * 60.0f / 29.0f ;   //unit: rpm
    speed_count_1 = 0;

    ///PI controller for motor1///
   
    err_1 = rotation_speed_ref_1 - rotation_speed_1;
    ierr_1 = ierr_1 + err_1*Ts;
    PI_out_1 = Kp*err_1 + Ki*ierr_1;
    
    //////////////////////////////
    
    if(PI_out_1 >= 0.5f)PI_out_1 = 0.5;
    else if(PI_out_1 <= -0.5f)PI_out_1 = -0.5;
    pwm1_duty = PI_out_1 + 0.5f;
    pwm1.write(PI_out_1 + 0.5f);
    TIM1->CCER |= 0x4;

    //motor2
    rotation_speed_2 = (float)speed_count_2 * 100.0f / 12.0f * 60.0f / 29.0f;   //unit: rpm
    speed_count_2 = 0;

    ///PI controller for motor2///
    
    err_2 = rotation_speed_ref_2 - rotation_speed_2;
    ierr_2 = ierr_2 + err_2*Ts;
    PI_out_2 = Kp*err_2 + Ki*ierr_2;
    
    //////////////////////////////
    
    if(PI_out_2 >= 0.5f)PI_out_2 = 0.5;
    else if(PI_out_2 <= -0.5f)PI_out_2 = -0.5;
    pwm2_duty = PI_out_2 + 0.5f;
    pwm2.write(PI_out_2 + 0.5f);
    TIM1->CCER |= 0x40;
}