Initial Commit

TeensyFirmware.ino

@@ -0,0 +1,129 @@
+#include <ros.h>
+#include <std_msgs/Bool.h>
+#include <std_msgs/String.h>
+#include <std_msgs/Int32.h>
+#include <std_msgs/Empty.h>
+#include <ac_msgs/drive_values.h>
+ros::NodeHandle  nh;
+
+
+boolean flagStop = false;
+int pwm_center_value = 9830;  //  15% duty cycle
+int pwm_lowerlimit = 6554;    //  10% duty cycle
+int pwm_upperlimit = 13108;   //  20% duty cycle
+
+std_msgs::Int32 str_msg;
+ros::Publisher chatter("chatter", &str_msg);
+
+int kill_pin = 2;
+unsigned long duration = 0;
+
+void messageDrive( const drive_msgs::drive_values& pwm )
+{
+//  Serial.print("Pwm drive : ");
+//  Serial.println(pwm.pwm_drive);
+//  Serial.print("Pwm angle : ");
+//  Serial.println(pwm.pwm_angle);
+
+  if(flagStop == false)
+  {
+    str_msg.data = pwm.pwm_drive;
+    chatter.publish( &str_msg );
+
+    if(pwm.pwm_drive < pwm_lowerlimit)
+    {
+      analogWrite(5,pwm_lowerlimit);    //  Safety lower limit        
+    }
+    else if(pwm.pwm_drive > pwm_upperlimit)
+    {
+      analogWrite(5,pwm_upperlimit);    //  Safety upper limit
+    }
+    else
+    {
+      analogWrite(5,pwm.pwm_drive);     //  Incoming data                    
+    }
+
+
+    if(pwm.pwm_angle < pwm_lowerlimit)
+    {
+      analogWrite(6,pwm_lowerlimit);    //  Safety lower limit        
+    }
+    else if(pwm.pwm_angle > pwm_upperlimit)
+    {
+      analogWrite(6,pwm_upperlimit);    //  Safety upper limit
+    }
+    else
+    {
+      analogWrite(6,pwm.pwm_angle);     //  Incoming data                    
+    }
+
+  }
+  else
+  {
+    analogWrite(5,pwm_center_value);
+    analogWrite(6,pwm_center_value);    
+  }
+}
+
+void messageEmergencyStop( const std_msgs::Bool& flag )
+{
+  flagStop = flag.data;
+  if(flagStop == true)
+  {
+    analogWrite(5,pwm_center_value);
+    analogWrite(6,pwm_center_value);    
+  }
+}
+
+
+ros::Subscriber<drive_msgs::drive_values> sub_drive("drive_pwm", &messageDrive );
+ros::Subscriber<std_msgs::Bool> sub_stop("eStop", &messageEmergencyStop );
+
+
+void setup() {
+
+  analogWriteFrequency(5, 100);
+  analogWriteFrequency(6, 100);
+  analogWriteResolution(16);
+  analogWrite(5,pwm_center_value);
+  analogWrite(6,pwm_center_value);
+  pinMode(13,OUTPUT); 
+  digitalWrite(13,HIGH);
+  pinMode(2,INPUT); 
+//  digitalWrite(2,LOW);
+
+  nh.initNode();
+  nh.subscribe(sub_drive);
+  nh.subscribe(sub_stop);
+
+  nh.advertise(chatter);
+}
+
+void loop() {
+  nh.spinOnce();
+  duration = pulseIn(kill_pin, HIGH, 30000);
+  while(duration > 1900)
+  {
+    duration = pulseIn(kill_pin, HIGH, 30000);
+    analogWrite(5,pwm_center_value);
+    analogWrite(6,pwm_center_value);        
+  }
+  // put your main code here, to run repeatedly:
+  /*
+  if(Serial.available())
+  {
+    int spd = Serial.read();
+    if(spd>127) {
+      spd = spd-128;
+      spd = map(spd,0,100,410,820);
+      analogWrite(5,spd);  
+    }
+    else {
+      //angle servo
+      spd = map(spd,0,100,410,820);
+      analogWrite(6,spd);
+    }
+    
+  } 
+  */ 
+}