Diff: main.cpp

Revision:

0:a3f89fb87618

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Dec 08 12:38:54 2014 +0000
@@ -0,0 +1,60 @@
+#include "mbed.h"
+
+const int addr = 0x20;                     //slave address 
+I2C master (D14,D15);                      //configure pins p27,p28 as I2C master
+Serial pc (USBTX,USBRX);
+
+int write_to_slave(char);
+char* read_from_slave();
+
+bool write_ack  = true; 
+bool read_ack   = true;
+char* data_send = new char;
+char* data_rec  = new char;
+bool write_loop = true;
+bool read_loop  = true;
+
+
+int main(){
+    
+    while(1)
+    {
+        printf("1 press backspace for master to start \n\r");
+        if(pc.getc()==8){
+            master.frequency(100000);
+            data_rec = read_from_slave();
+            printf("4 in main read %c from slave\n\r",*data_rec);
+        }    
+    }
+}    
+    
+int write_to_slave(char send){
+     
+                printf("2 master clk freq setup and addressing slave\n\r");
+                master.frequency(100000);                       //set clock frequency
+                write_loop = true;
+                while(write_ack){  
+                    master.start();                                 //initiating the data transfer
+                    printf("entered write loop \n\r");
+            
+                    write_ack = (bool) master.write(addr|0x00,&send,1,false);
+                    if(!write_ack){
+                        printf("3 master has written %c to slave\n\r",send);
+                        write_loop=false;
+                        
+                    }
+                }
+                return(1);
+}
+
+char* read_from_slave(){
+          read_ack = true;
+          printf("2 master entered function to read\n\r");
+          while(read_ack){
+                master.start();                                 //initiating the data transfer
+                read_ack = (bool) master.read(addr|0x1,data_rec,1,false);
+                //printf("3 addressing slave\n\r");
+          }  
+          printf("4 master has read %c from slave\n\r",*data_rec);
+          return(data_rec);
+}
\ No newline at end of file