Diff: main.cpp

Revision:

0:1d0064af1637

diff -r 000000000000 -r 1d0064af1637 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed May 20 11:10:34 2015 +0000
@@ -0,0 +1,71 @@
+#include "mbed.h"
+#include "rtos.h"
+Serial pc(USBTX,USBRX);
+InterruptIn irpt_4m_mstr(D11);                                      //I2c interrupt from CDMS
+DigitalOut irpt_2_mstr(D12);                                        //I2C interrupt to CDMS
+I2CSlave slave (D14,D15);
+
+const int addr = 0x20;                                            //slave address 
+char data_receive;
+char data_send;
+Thread *ptr_t_i2c;
+
+Timer t;                  // time taken from isr to reach i2c function
+Timer t1;
+  bool write_ack = 1;
+        bool read_ack = 1;
+        char data;
+        char length = 1;
+void T_I2C_SLAVE(void const * args)
+{
+     while(1)
+    {
+        Thread::signal_wait(0x1);
+        wait_us(100);                                               // can be between 38 to 15700
+        //printf("\n\r check 1\n");
+        t.stop();
+        if( slave.receive() == 0) 
+            //slave.stop();                  
+        if( slave.receive() == 1)                                     // slave writes to master
+        {
+            t1.start();
+            write_ack=slave.write(&data,length);       
+            t1.stop();      
+            //slave.stop();    
+        }
+        if( slave.receive()==3 ||  slave.receive()==2)             // slave read 
+        {
+            t1.start();
+            read_ack=slave.read(&data,length);
+            t1.stop();
+            //slave.stop();
+        }   
+        printf("\n \r %d %d\n",t.read_us(),t1.read_us());
+        t.reset();
+        t1.reset(); 
+        
+        if(write_ack == 0)
+            printf("\n\rData sent to CDMS is %c\n",data);
+        if(read_ack == 0)
+            printf("\n\r Data received from CDMS is %c \n",data);
+    }
+}
+
+
+void FCTN_ISR_I2C()
+{
+     ptr_t_i2c->signal_set(0x1); 
+     t.start();
+}
+
+int main()
+{
+   printf("\n\r SLAVE ACTIVATED\n");
+   slave.address(addr);
+   //slave.frequency(100000);  
+   ptr_t_i2c = new Thread(T_I2C_SLAVE);
+   irpt_4m_mstr.enable_irq();
+   //irpt_4m_mstr.mode(PullDown);
+   irpt_4m_mstr.rise(&FCTN_ISR_I2C);
+   
+}
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