Diff: main.cpp

Revision:

0:3676273fc394

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Dec 13 07:47:06 2014 +0000
@@ -0,0 +1,125 @@
+#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);
+DigitalOut data_ready(D10);
+int i2c_status=0;                                 //read/write mode for i2c 0 : write2slave, 1 : write2master
+
+int temp;
+
+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, int length=1)
+{
+       int slave_status = 1;
+   
+    while(slave_status)
+    {                 
+            slave.address(0x20);
+            if(slave.receive()==1)
+            {
+                slave_status=slave.write(data,length);
+               
+                
+            }
+            else if(slave.receive()==3 || slave.receive()==2)
+            {
+                slave_status=slave.read(data,length);
+            }
+            
+    }
+            printf("\ndone\n\r");
+
+}
+
+void T_I2C_BAE(void const * args)
+{
+    char data_send,data_receive;
+    while(1)
+    {
+        Thread::signal_wait(0x1);
+        //i2c_status = temp;
+        //wait(0.5);
+        printf("\n entered thread\n\r");
+        if(i2c_status == 0)
+        {
+            
+            FUNC_I2C_WRITE2CDMS(&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);
+            printf("\n Data received from CDMS is %c\n\r",data_receive);
+            i2c_data_receive.free(i2c_data_r);
+            
+        }
+        else if(i2c_status ==1 )
+        {
+            osEvent evt = i2c_data_send.get();
+            if (evt.status == osEventMail) 
+            {
+                i2c_data *i2c_data_s = (i2c_data*)evt.value.p;
+                data_send = i2c_data_s -> data;
+                FUNC_I2C_WRITE2CDMS(&data_send);
+                printf("\nData sent to CDMS is %c\n\r",data_send);
+                i2c_data_send.free(i2c_data_s);
+                i2c_status = 0;
+                //temp = i2c_status;
+            }
+        }  
+           
+    }
+}
+        
+void FUNC_INT()
+{
+  
+   ptr_t_i2c->signal_set(0x1);
+     
+}
+
+void ir2master()
+{
+        
+        char data='a';
+        data_ready=0;
+        data = pc.getc();
+        i2c_status=1;
+        i2c_data * i2c_data_s = i2c_data_send.alloc();
+        i2c_data_s->data = data;
+        i2c_data_s->length = 1;
+        i2c_data_send.put(i2c_data_s); 
+        data_ready=1;
+        //temp = i2c_status;
+}
+      
+   
+
+
+int main()
+{   
+    printf("\n slave started\n\r");
+    ptr_t_i2c = new Thread(T_I2C_BAE);
+    interrupt.rise(&FUNC_INT);
+    while(1)
+    {
+      ir2master(); 
+                
+    }
+     
+}
+
+
+