Revision 0:acc1f8a1b321, committed 2014-07-05

Comitter:

viswachaitanya

Date:

Sat Jul 05 06:38:13 2014 +0000

Commit message:

i2c slave(4 bit sensor data storage)

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sat Jul 05 06:38:13 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/04dd9b1680ae
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/slave.cpp	Sat Jul 05 06:38:13 2014 +0000
@@ -0,0 +1,88 @@
+#include "slave.h"
+#include "HK.h"
+
+extern SensorData Sensor;
+I2CSlave slave(p28,p27);                       //configuring pins p27, p28 as I2Cslave
+Serial screen (USBTX,USBRX);
+void write_to_master(char send)                           //function to write data to master
+        {
+           int acknowledge; 
+           int loopvariable4=1;
+           while(loopvariable4)
+           {
+           acknowledge = slave.write(send);    //sending the byte to master
+           if(acknowledge==1)
+            {
+              screen.printf(" acknowledge %d sent %x \n",acknowledge,send);
+              loopvariable4=0;
+            }
+           } 
+        }
+        
+
+
+
+void FUNC_I2C_SLAVE_MAIN(int slave_address,int iterations)
+{
+    wait(0.5);
+    screen.printf("\nSlave entered\n");
+    slave.address(slave_address);                           //assigning slave address
+    int Switch_Variable;
+    int ReadAddressed=1;
+    int WriteGeneral=3;
+    int loopvariable1=1;
+    int loopvariable2=0;
+    int loopvariable3=1;
+//initialising dummy sensor data                         
+    
+    while(loopvariable1)
+    { 
+//to read data from master       
+    if(slave.receive()==WriteGeneral)                   //checking if slave is addressed to write
+    {
+      Switch_Variable=slave.read();                   //receiving data
+      screen.printf("switch variable=%d\n",Switch_Variable);
+      slave.stop();                          //reset slave to default receiving state
+      loopvariable1=0;
+//to interpret and write data to master       
+      switch(Switch_Variable)
+      {
+      
+       case 1:    while(loopvariable3)
+                  {
+                     if(slave.receive()==ReadAddressed)             //check if slave is addressed to read 
+                   {
+                      while(loopvariable2<iterations)
+                     {
+                      if(loopvariable2%3==0)
+                          {
+                          screen.printf("\nvoltage%d\n",loopvariable2/3);
+                          write_to_master(Sensor.Voltage[loopvariable2/3]);
+                          }
+                      else if(loopvariable2%3==1)
+                          {   
+                          screen.printf("\ncurrent%d\n",loopvariable2/3);
+                          write_to_master(Sensor.Current[loopvariable2/3]);
+                          }
+                      else if(loopvariable2%3==2)
+                          {   
+                          screen.printf("\ntemp%d\n",loopvariable2/3);
+                          write_to_master(Sensor.Temp[loopvariable2/3]);
+                          }         
+                      loopvariable2++;
+                       }//while(loopvariable2<30)
+                      slave.stop();    
+                      loopvariable3=0;  
+                    }//if(read addressed)
+                    
+                    }//while(loopvariable3)
+                  
+                  break;
+         case 2 : screen.printf(" telecommand 2\n");
+                  break;         
+                 
+        }//switch case ends
+   }   
+}
+   screen.printf("done");
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/slave.h	Sat Jul 05 06:38:13 2014 +0000
@@ -0,0 +1,4 @@
+#include "mbed.h"
+
+void write_to_master(char);                    //function to write data to master
+void FUNC_I2C_SLAVE_MAIN(int slave_address,int iterations);