Revision 0:7d01a895b45d, committed 2017-09-19

Comitter:

Armand

Date:

Tue Sep 19 11:53:38 2017 +0000

Commit message:

First publish

Changed in this revision

diff -r 000000000000 -r 7d01a895b45d Comms.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Comms.cpp	Tue Sep 19 11:53:38 2017 +0000
@@ -0,0 +1,39 @@
+#include "Comms.h"
+#include "mbed.h"
+  
+Comms::Comms(PinName TX, PinName RX) : RawSerial(TX, RX)
+{
+  msg_counter = 0;
+  newmsg = false;
+  
+  attach(this, &Comms::commsinterrupt); 
+}
+ 
+void Comms::commsinterrupt() 
+{    
+    char c = getc();                //read the incoming character                   
+                            
+    if(c == '!')
+    {
+        msg_counter = 0;
+    }
+    else if(c == '#')
+    {
+        msg[msg_counter] = '\0';
+        newmsg = true;                          //enable the new message flag to indicate a COMPLETE message was received
+        msg_counter = 0;                      //clear the message string
+    } 
+    else 
+    {
+        msg[msg_counter] = c;               //add the character to the message string
+        msg_counter++;                        //move to the next character in the string
+    }  
+    
+    if(newmsg == true)
+    {
+        sscanf(msg,"%s %f", &cmd, &data);
+        newmsg = false;   
+    } 
+}
+
+       
\ No newline at end of file

diff -r 000000000000 -r 7d01a895b45d Comms.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Comms.h	Tue Sep 19 11:53:38 2017 +0000
@@ -0,0 +1,97 @@
+/* Comms Library for communicating with the bluetooth car. v1.0
+ * Copyright (c) 2017 Armand Coetzer
+ * s213293048@nmmu.ac.za
+ *
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+ 
+#ifndef Comms_H
+#define Comms_H
+ 
+#include "mbed.h"
+ 
+/** Class library to create a serial connection from the MCU to the bluetooth device.
+ *
+ * Example:
+ * @code
+ * #include "mbed.h"
+ *#include "Comms.h"
+ *
+ *Comms BT(PC_6, PC_7);
+ *
+ *int main() 
+ *{
+ *    while(1) 
+ *    {   
+ *        if(BT.newmsg == true)
+ *        {                                  
+ *            BT.printf("%s\n",BT.cmd);
+ *            BT. printf("%.2f\n", BT.data);
+ *            BT.clrmsg();
+ *        }
+ *        
+ *    }
+ *}
+ * @endcode
+ */
+ 
+class Comms : public RawSerial{
+  public:
+    /** Create a serial connection from the MCU to the bluetooth device. 
+    * @param TX Pin for transmitting data.
+    * @param RX Pin for Receiving data.
+    */
+    Comms(PinName TX, PinName RX);
+    
+   // /** changing the boolen variable to false.
+   // * @param 
+   // *     None
+  //  */
+   // void clrmsg();
+    
+    /** float variable for storing the speed value.
+    * @param 
+    *     None
+    */
+    float data;
+    
+    /** Character string for storing the direction.
+    * @param 
+    *     None
+    */
+    char cmd[50];
+     
+    /** boolean variable to state if there is a new message or not.
+    * @param 
+    *     None
+    */ 
+    bool  newmsg;
+        
+
+  private:
+  
+    void commsinterrupt();
+    
+    char msg[50];          //incoming message string
+    int msg_counter;      //character position counter in the message string
+    
+};
+ 
+#endif