Diff: main.cpp

Revision:

4:133b49d51b18

Parent:

3:5e68dd4bbb70

Child:

5:ce0bb4174ca4

--- a/main.cpp	Wed Dec 10 05:21:50 2014 +0000
+++ b/main.cpp	Wed Dec 10 10:33:56 2014 +0000
@@ -1,23 +1,34 @@
 #include "mbed.h"
+#include "rtos.h"
 
 void write_to_master(char);                    //function to write data to master
-
+Thread * ptr_t_i2c;
 I2CSlave slave(D14,D15);                       //configuring pins p27, p28 as I2Cslave
 Serial pc (USBTX,USBRX);
 InterruptIn interrupt(D9);
-void FUNC_I2C_WRITE2CDMS(char  * data,int length)
+
+typedef struct
 {
+    char data;          // To avoid dynamic memory allocation
+    int length;
+}i2c_data;
 
+Mail<i2c_data,16> i2c_data_receive;
+Mail<i2c_data,16> i2c_data_send;
+
+void FUNC_I2C_WRITE2CDMS(char *data_receive,char *data_send, int length=1)
+{
+       
     int slave_status = 1;
     while(slave_status)
     {                 
             slave.address(0x20);
             if(slave.receive()==1)
             {
-                slave_status=slave.write(data,length);
+                slave_status=slave.write(data_send,length);
                // printf("\n In the while loop\n");
                 
-               /* if(!slave_status)
+                /*if(!slave_status)
                 {
                         printf("slave wrote %c to master\n\r",*data);
               
@@ -27,7 +38,8 @@
             else
                 if(slave.receive()==3 || slave.receive()==2)
                 {
-                     slave_status=slave.read(data,length);
+                     //i2c_data *i2c_data_r = i2c_data_receive.alloc();
+                     slave_status=slave.read(data_receive,length);
                      /*if(!slave_status)
                      {
                          printf("1 read %c from master\n\r",*data);
@@ -36,47 +48,58 @@
             //slave.stop();
     }
             printf("2 done");
+
 }
 
-/*void FUNC_I2C_READFCDMS()
-
+void T_I2C_BAE(void const * args)
 {
-    printf("\nEntered slave code\n");
-    //read_loop=true;
-    char *data_rec = new char;
-   int slave_status =1;
-     
-     slave.address(0x20);
-                
-     
-                
-     printf("\nentered slave while loop\n");
-                //if(slave.receive()==3) 
-                while(slave_status==1)
-                    slave_status=slave.read(data_rec,1);
-                
-     if(slave_status==0){printf("1 read %c from master\n\r",*data_rec);}
-      //                 read_loop = false;}
-                   
-     printf("\n done \n \r");
-     
-     delete data_rec;
-    
+    char data_send,data_receive;
+    data_send = 'a';
+    while(1)
+    {
+        Thread::signal_wait(0x1);
+        FUNC_I2C_WRITE2CDMS(&data_receive,&data_send);
+        //printf("\n Data received from CDMS is %c\n",data_receive);
+        i2c_data * i2c_data_r = i2c_data_receive.alloc();
+        i2c_data_r->data = data_receive;
+        i2c_data_r->length = 1;
+        i2c_data_receive.put(i2c_data_r);
+    }
 }
-*/   
+        
+void FUNC_INT()
+{
+  // char * data = new char;
+   //*data = 'a';
+   ptr_t_i2c->signal_set(0x1);
+   //delete data;
+}
+   
+
+
 void main()
 {
     printf("\nStarted slave... waiting for master\n");
-    char * data = new char;
-    *data = 'a';
-    
+    ptr_t_i2c = new Thread(T_I2C_BAE);
+    char data='a';
+    interrupt.rise(&FUNC_INT);
     while(1)
     {
         //*(data_send)=pc.getc();
         
-        FUNC_I2C_WRITE2CDMS(data,1);
-        printf("\n The data send or received by slave is %c\n",*data);
-        (*data)++;
+        //FUNC_I2C_WRITE2CDMS(&data,1);
+        //printf("\n The data send or received by slave is %c\n",data);
+        //(data)++;
         //wait(1);
+         osEvent evt = i2c_data_receive.get();
+         if (evt.status == osEventMail) 
+         {
+            i2c_data *i2c_data_r = (i2c_data*)evt.value.p;
+            printf("\nData read from CDMS is %c\n",i2c_data_r->data);
+            
+            i2c_data_receive.free(i2c_data_r);
+            //delete i2c_data_r;
+        }
+        
     }
 }
\ No newline at end of file