Diff: main.cpp

Revision:

0:252ce694a71e

Child:

1:24c54d213671

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Dec 17 12:49:58 2014 +0000
@@ -0,0 +1,155 @@
+#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);
+
+int reset;
+
+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;
+
+Thread * ptr_t_i2c;
+void FUNC_I2C_MASTER_FSLAVE(char * data,int length)
+{
+    //printf("press backspace for master to start \n\r");
+    //while(1){
+            //interrupt = 0;
+      //  if(pc.getc()=='z'){
+            wait(0.5);
+            interrupt = 1;
+            printf("\nMaster executed\n");
+            
+          
+            bool ack0 =true; 
+            bool loopvariable0 =true;
+            //char *data =  new char;
+            //*data = 'b';
+           
+           
+            
+             master.frequency(100000);                       //set clock frequency
+             //master.start();
+            /*while(write2slave)
+            {  *writedata = pc.getc();
+            wait(0.5);
+              
+                printf("master clk freq setup and addressing slave\n\r");
+                master.start();                                 //initiating the data transfer
+                master_status_write = (bool) master.write(addr|0x00,writedata,1);
+                if(master_status_write==0)
+                {
+                    printf("master has written %c to slave\n\r",*writedata);
+                    write2slave=false;
+                }
+                    
+                    
+             }*/
+             
+            while(ack0)
+            {
+                //printf("2 master clk freq setup and addressing slave\n\r");
+                
+                master.start();                                 //initiating the data transfer
+                ack0 =  master.read(addr,data,length);
+            }
+            if(!ack0)
+            {
+                    printf("\n master has read %s from slave\n\r",data);
+                    loopvariable0=false;
+            }
+                //master.stop();
+            
+            //printf("done\n\r");
+            //delete data;
+            interrupt=0;
+}
+            
+void T_I2C_MASTER_FSLAVE(void const *args)
+{
+    char data_receive[25];
+    while(1)
+    {
+        Thread::signal_wait(0x1);
+        FUNC_I2C_MASTER_FSLAVE(data_receive,25);
+        /*i2c_data * i2c_data_r = i2c_data_receive.alloc();
+        strcpy(i2c_data_r->data , data_receive);
+        i2c_data_r->length = 25;
+        i2c_data_receive.put(i2c_data_r);*/
+        printf("\n Data received from slave is %s\n\r",data_receive);
+    }
+}
+
+void FUNC_INT()
+{
+  
+   ptr_t_i2c->signal_set(0x1);
+     
+}
+
+char writedata;
+bool write2slave;
+bool master_status_write;
+void FUNC_MASTER_WRITE()
+{   //wait(1);
+    write2slave=true;
+   
+    
+     
+    char data = pc.getc();
+    interrupt = 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); 
+    master_status_write = true;
+    
+   // interrupt = 1; 
+
+    osEvent evt = i2c_data_send.get();
+            if (evt.status == osEventMail) 
+            {
+                i2c_data *i2c_data_s = (i2c_data*)evt.value.p;
+                writedata = i2c_data_s -> data;
+                master.frequency(100000);                        //set clock frequency
+                while(write2slave)
+                {                
+                printf("master clk freq setup and addressing slave\n\r");
+                master.start();                                 //initiating the data transfer
+                master_status_write = (bool) master.write(addr|0x00,&writedata,1);
+                if(master_status_write==0)
+                    {
+                    printf("master has written %c to slave\n\r",writedata);
+                    write2slave=false;
+                    }
+                i2c_data_send.free(i2c_data_s);
+                }
+            }
+            interrupt = 0;
+}
+
+    
+
+int main()
+{   
+    ptr_t_i2c = new Thread(T_I2C_MASTER_FSLAVE);
+    data_ready.rise(&FUNC_INT);
+    printf("\nstarted master\n"); 
+    while(1)
+    { //Thread::wait(9000);
+    //interrupt = 1;
+      
+      FUNC_MASTER_WRITE(); 
+      //interrupt = 0; 
+      ;
+    }
+}           
\ No newline at end of file