Diff: main.cpp

Revision:

0:c8358e319c9f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Dec 13 07:48:08 2014 +0000
@@ -0,0 +1,117 @@
+#include "mbed.h"
+#include "rtos.h"
+
+const int addr = 0x20;                     //slave address 
+I2C master (D14,D15);                      //configure pins p27,p28 as I2C master
+Serial pc (USBTX,USBRX);
+DigitalOut interrupt(D9);
+InterruptIn data_ready(D10);
+Thread * ptr_t_i2cmaster;
+
+typedef struct
+{
+    char data;          // To avoid dynamic memory allocation
+    int length;
+}master_data;
+
+Mail<master_data,16> master_data_receive;
+Mail<master_data,16> master_data_send;
+void FUNC_MASTER_WRITE();
+
+void T_MASTER_READ(void const* args)
+{
+        
+        while(1)
+        {
+            Thread::signal_wait(0x2);             //master reading from slave
+            wait(0.5);
+            interrupt = 1;
+            printf("\nMaster executed\n\r");
+            bool ack0 =true; 
+            char *data_receive =  new char;
+            *data_receive = 'b';
+            master.frequency(100000);                       //set clock frequency
+             
+             
+            while(ack0)
+            { 
+                master.start();                                 //initiating the data transfer
+                ack0 =  master.read(addr,data_receive,1);
+            }
+            
+            master_data * master_data_r = master_data_receive.alloc();
+            master_data_r->data = *data_receive;
+            master_data_r->length = 1;
+            master_data_receive.put(master_data_r);
+            printf("\n Data received from CDMS is %c\n\r",*data_receive);
+            master_data_receive.free(master_data_r);
+            
+            delete data_receive;
+            interrupt=0;
+            
+        }
+}
+ 
+void FUNC_MASTER_IR()
+{
+     ptr_t_i2cmaster->signal_set(0x2);               
+}                   
+
+/*void FUNC_TELECOMMAND()
+{
+    interrupt = 0;
+    char writedata = pc.getc();
+    interrupt = 1; 
+    master_data * master_data_s = master_data_send.alloc();
+    master_data_s->data = writedata;
+    master_data_s->length = 1;
+    master_data_send.put(master_data_s); 
+    FUNC_MASTER_WRITE();
+}*/
+  
+char* data_send =new char;  
+void FUNC_MASTER_WRITE()
+{
+        printf("\n entered master write\n\r");
+        
+        interrupt = 0;
+    *data_send = pc.getc();
+    //printf("\n %c \n\r",*data_send);
+    interrupt = 1; 
+    /*master_data * master_data_s = master_data_send.alloc();
+    master_data_s->data = writedata;
+    master_data_s->length = 1;
+    master_data_send.put(master_data_s); */
+        
+       /* osEvent evt = master_data_send.get();
+            if (evt.status == osEventMail) 
+            {
+                master_data *master_data_s = (master_data*)evt.value.p;
+                *data_send = master_data_s -> data;*/
+                bool write2slave=true;
+                bool master_status_write = true;
+                master.frequency(100000);       //set clock frequency
+                while(write2slave){                
+                    master.start();                             //initiating the data transfer
+                    master_status_write = (bool) master.write(addr|0x00,data_send,1);
+                    if(master_status_write==0)
+                    {
+                    printf("master has written %c to slave\n\r",*data_send);
+                    write2slave=false;
+                    }
+                }
+               // master_data_send.free(master_data_s);
+                
+            //}
+}            
+
+int main()
+{   
+    
+    printf("\nstarted master\n\r");
+    ptr_t_i2cmaster = new Thread(T_MASTER_READ);
+    data_ready.rise(&FUNC_MASTER_IR);
+    while(1){
+        FUNC_MASTER_WRITE(); 
+    }
+}
\ No newline at end of file