Revision 0:a39f49a913e6, committed 2014-12-03

Comitter:

viswachaitanya

Date:

Wed Dec 03 10:36:09 2014 +0000

Commit message:

pre 12/2014 testing

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Dec 03 10:36:09 2014 +0000
@@ -0,0 +1,12 @@
+#include "master.h"                          //library                                              //
+int main()
+{
+    while(1)
+    {
+    master_main();
+    wait(1);
+    }
+}
+
+
+

--- /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  
+}
+
+
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/master.h	Wed Dec 03 10:36:09 2014 +0000
@@ -0,0 +1,10 @@
+#include "mbed.h"                          //library                                              
+#define get_hk_data '1'                      //sample telecommands
+#define telecommand2 '2'
+#define telecommand3 '3'
+#define telecommand4 '4'
+#define telecommand5 '5'
+
+const int addr = 0x20;                     //slave address 
+char receive_byte();                      //funtion to receive float data 
+void master_main();
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Dec 03 10:36:09 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/552587b429a1
\ No newline at end of file