Diff: master.cpp

Revision:

0:a39f49a913e6

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/master.cpp	Wed Dec 03 10:36:09 2014 +0000
@@ -0,0 +1,83 @@
+#include "master.h"
+
+I2C master (p28,p27);                      //configure pins p27,p28 as I2C master
+Serial pc (USBTX,USBRX);
+
+struct SensorData                          //HK_data_structure
+{
+    char voltage[10];
+    char current[10];
+    char temp[10];
+} Sensor;
+
+void master_main()
+{
+    wait(0.5);
+    printf("1\n");
+    bool acknowledge1;
+    bool acknowledge2;
+    uint8_t loopvariable2=0;
+    bool loopvariable1 = true;
+    bool loopvariable3 = true;
+    while(loopvariable1)
+    {
+//-------------writing the command to slave--------------------------------------------------------------        
+        printf("2\n");
+        master.frequency(100000);                       //set clock frequency
+        master.start();                                 //initiating the data transfer
+        acknowledge2 = (bool) master.write(addr|0x00);           //addressing the slave to write
+        if(acknowledge2)                             //proceeding further only if slave is addressed
+        {
+            printf("3\n");
+        acknowledge1 = (bool) master.write(get_hk_data);         //sending the command to slave 
+        if(acknowledge1)                             //proceeding further only if sent data is acknowledged   
+           {
+               printf("acknowledge1=%d\n",acknowledge1);
+               loopvariable1=false;                         //if acknowledged, breaking loop in next iteration
+               
+//--------------reading data from slave---------------------------------------------------------------          
+               while(loopvariable3)
+                 {              
+                    master.frequency(100000);                    //set clock frequency 
+                    master.start();                              //initiate data transfer 
+                    acknowledge1 = (bool) master.write(addr | 0x01);    //addressing the slave to read
+                    
+                    if(acknowledge1)                          //proceedong only if slae is addressed
+                       {  
+                       loopvariable3 = false;
+                       while(loopvariable2<8)
+                          { 
+                              Sensor.voltage[loopvariable2] =  receive_byte();              //receiving data if acknowledged
+                              printf(" voltage%d = %x\n",loopvariable2,Sensor.voltage[loopvariable2]);
+                             
+                              Sensor.current[loopvariable2] =  receive_byte();             //receiving data if acknowledged
+                              printf(" current%d = %x\n",loopvariable2, Sensor.current[loopvariable2]);
+                            
+                              Sensor.temp[loopvariable2] =  receive_byte();                //receiving data if acknowledged
+                              printf(" temperature%d = %x\n",loopvariable2,Sensor.temp[loopvariable2]);
+                            
+                              loopvariable2++;
+                          
+                          } //while(loopvariable2<30) 
+                       }//if(acknowledge1==1)
+                 
+                    master.stop();
+                 }//while(loopvariable3) 
+            }//if(acknowledge1==1)   
+        }//if(acknowledge2==1) 
+     }//while(loopvariable1)
+   printf("done");
+}//main
+
+
+//----------------function to read and return the data received-----------------------------------
+char receive_byte()                                    
+{
+   
+    char value;
+    value = master.read(1);                     
+    return(value);                              //returning the 4 byte floating point number  
+}
+
+
+