Revision 4:e3357adeab6c, committed 2016-09-11

Comitter:

fpapayannis

Date:

Sun Sep 11 15:06:27 2016 +0000

Parent:

3:c0f6dcd350a8

Commit message:

UART3 funcionando con Interrupciones de Lectura

Changed in this revision

--- a/main.cpp	Fri Sep 09 23:54:26 2016 +0000
+++ b/main.cpp	Sun Sep 11 15:06:27 2016 +0000
@@ -1,31 +1,67 @@
 #include "mbed.h"
 #include "Serial.h"
-//------------------------------------
-// Hyperterminal configuration
-// 9600 bauds, 8-bit data, no parity
-//------------------------------------
 
 #define SERIAL_TX P0_10
 #define SERIAL_RX P0_11
 #define LEDStick P0_22
 
 Serial pc(SERIAL_TX, SERIAL_RX);
- 
 DigitalOut myled(LEDStick);
+
+void Rx_interrupt();
+
+
+// Circular buffers for serial TX and RX data - used by interrupt routines
+const int buffer_size = 255;
+// might need to increase buffer size for high baud rates
+//char tx_buffer[buffer_size+1];
+char rx_buffer[buffer_size+1];
+// Circular buffer pointers
+// volatile makes read-modify-write atomic 
+//volatile int tx_in=0;
+//volatile int tx_out=0;
+volatile int rx_in=0;
+volatile int rx_out=0;
+// Line buffers for sprintf and sscanf
+//char tx_line[80];
+//char rx_line[80];
  
 int main() {
-  int i = 1;
-  char caracter='A';
+
   pc.baud(9600);
   pc.format(8,Serial::None,1);
+  
+  // Setup a serial interrupt function to receive data
+    pc.attach(&Rx_interrupt, Serial::RxIrq);
+  
   pc.printf("Hello World !\n");
-  while(1) { 
-      wait(1);
-      caracter=pc.getc();
-      wait(1);
-      pc.putc(caracter);
-      //pc.printf("This program runs since %d seconds.\n", i++);
-      myled = !myled;
-  }
+  while(1)
+  { 
+      
+      if(rx_in)
+      {
+          pc.printf("%c",rx_buffer[rx_out]);
+          rx_out++;
+          if(rx_in==rx_out)
+          {
+            rx_in=0;
+            rx_out=0;
+            }
+        }
+}
 }
- 
\ No newline at end of file
+
+
+
+// Interupt Routine to read in data from serial port
+void Rx_interrupt()
+{
+        if(pc.readable())
+        {
+            rx_buffer[rx_in] = pc.getc();
+            rx_in++;
+        }
+        if(rx_in==buffer_size)
+            pc.printf("Buffer excedido");
+    return;
+}
\ No newline at end of file