xbee communication for UWB quadcopter project Originally by Greg Abdo Forking to reduce impact of interrupt by moving packetbuilder out of the interrupt and letting be handled in the main loop

Fork of com by Prosper Van

Revision:
13:2fb7b19dcd70
Parent:
12:bf4642578682
Child:
14:d2acb373d81c
--- a/com.cpp	Sat Apr 26 02:38:08 2014 +0000
+++ b/com.cpp	Thu May 22 05:58:40 2014 +0000
@@ -16,8 +16,30 @@
 /*              4 -> Yaw                                                 */
 /*************************************************************************/
 
-#include "mbed.h"
 #include "com.h"
+#ifdef DEBUG_COM
+    Timer timerCom;
+    #define NL "\n\r"
+    #define PRINT(x) xbeeTx.printf(x)   //Serial.print(x)
+    #define PRINTF(x, y) xbeeTx.printf( (x) ,(y) )   //Serial.print(x, y)
+    #define PRINTLN(x) PRINT(x);PRINT(NL)
+    #define PRINTLNF(x, y) PRINTF((x) ,(y));PRINT(NL)
+    #define START timerCom.start(); 
+    #define STOP timerCom.stop()
+    #define RESET timerCom.reset()
+    #define READ timerCom.read_us()
+    #define GET(x) x = READ
+#else
+    #define PRINT(x)
+    #define PRINTF(x, y)
+    #define PRINTLN(x)
+    #define PRINTLNF(x, y) 
+    #define START 
+    #define STOP  
+    #define RESET 
+    #define READ 
+    #define GET(x)
+#endif
 
 
 /*********************** com( PinName, PinName ) *************************/
@@ -26,18 +48,19 @@
 
 com::com( PinName tx, PinName rx , PinName rssipin) : xbeeTx( tx, NC), xbeeRx( NC, rx), rssi(rssipin)
 {
-    index1 = 0;                            // How many bytes are in the buffer.
-    index2 = 0;                            // How many bytes are in the buffer.
-    pindex = 0;                            // How many bytes are in the buffer.
-    rdy2build = false;                       // Xbee is in transparent mode.
-    xbeeTx.baud(BAUDRATE);                    // Setup the serial baud rate.
-    xbeeRx.baud(BAUDRATE);                    // Setup the serial baud rate.
+    index1 = 0;                             // How many bytes are in the buffer.
+    index2 = 0;                             // How many bytes are in the buffer.
+    pindex = 0;                             // How many bytes are in the buffer.
+    rdy2build = false;                      // Xbee is in transparent mode.
+    xbeeTx.baud(BAUDRATE);                  // Setup the serial baud rate.
+    xbeeRx.baud(BAUDRATE);                  // Setup the serial baud rate.
     txBuffer = new queue();
     signalStrength = 0;
     xbeeRx.attach( this, &com::callback );    // Set callback as the interrupt handler. 
-    #ifdef DEBUG
+    #ifdef DEBUG_COM
     xbeeTx.printf("Communication.....Done\n\r");
     #endif
+    START;
 }
 
 /************************* bool isData()  ********************************/
@@ -46,7 +69,6 @@
 
 bool com::isData()
 {
-    
     return rdy2build;
 }
 
@@ -79,13 +101,20 @@
 
 void com::ackCheck()
 {
-    if( !txBuffer->isEmpty() && xbeeTx.writeable())
+    if( !txBuffer->isEmpty())
     {
     __disable_irq();
         short * pkt = txBuffer->pop();
+    __enable_irq();
         write(pkt[0],pkt[1]); //may need to disable interrupt
+        #ifdef DEBUG_COM
+        if(pkt[1] % 5 == 0) 
+        {
+            PRINTLNF("len: %d",txBuffer->queueLength());
+        }
+        #endif
         delete[] pkt;
-    __enable_irq();
+    
     }
 }
 
@@ -106,7 +135,7 @@
     while( xbeeRx.readable() )
     {
         char data = xbeeRx.getc(); 
-        
+//        xbeeRx.putc(data);
         if (isA1)
         {
             if ( data == 255 && index1 > 4 )
@@ -118,6 +147,7 @@
             }
             else if ( index1 < BUFFERSIZE )
             {
+                
                 buffer1[index1++] = data;
             }
         }
@@ -149,7 +179,8 @@
 {
     if (rdy2build)
     {
-        char * commandData = new char[pindex];
+        rdy2build = false;
+        char * commandData = new char[5];
         if (!isA1)
         {
             commandData[4] = buffer1[--pindex];     // Sequence Number.
@@ -167,6 +198,7 @@
             commandData[0] = buffer2[--pindex];     // Command.
         }
         
+//        xbeeTx.printf("Copied: %d %d %d %d %d\n\r",commandData[0],commandData[1],commandData[2],commandData[3],commandData[4]);
           
         if( commandData[0] + commandData[2] == commandData[3] ) // Validate checksum.
         {