Sam Grove / BufferedSerial

Inherit from Serial and use software buffers for TX and RX. This allows the UART peripherals to operate in a IRQ driven mode. Overrides most (but not all) stdio functions as Serial did

Dependencies:   Buffer

Dependents:   buffered_serial_test BLE_Police_HRM evena_BLE_Police_HRM df-2014-workshop-rfid-case-generator-k64f ... more

Example

 #include "mbed.h"
 #include "BufferedSerial.h"

 BufferedSerial pc(USBTX, USBRX);

 int main()
 {
     pc.baud(115200);
   
     while(1)
     {
         Timer s;
       
         s.start();
         pc.printf("Hello World - buff\n");
         int buffered_time = s.read_us();
         wait(0.1f); // give time for the buffer to empty
       
         s.reset();
         printf("Hello World - poll\n");
         int polled_time = s.read_us();
         s.stop();
         wait(0.1f); // give time for the buffer to empty
       
         pc.printf("printf buffered took %d us\n", buffered_time);
         pc.printf("printf polled took %d us\n", polled_time);
         wait(0.5f);
     }
 }

Diff: BufferedSerial.h

Revision:
5:4d6a311fc8bf
Parent:
3:6b76fcf27545
Child:
6:8287e83943f0
diff -r 2ba4d2e1f05d -r 4d6a311fc8bf BufferedSerial.h
--- a/BufferedSerial.h	Mon Dec 30 18:16:39 2013 +0000
+++ b/BufferedSerial.h	Mon Mar 24 19:56:57 2014 +0000
@@ -40,26 +40,24 @@
  *  BufferedSerial pc(USBTX, USBRX);
  *
  *  int main()
- *  {
- *      pc.baud(115200);
- *    
+ *  { 
  *      while(1)
  *      {
  *          Timer s;
  *        
  *          s.start();
- *          pc.printf("Hello World - buff\n");
+ *          pc.printf("Hello World - buffered\n");
  *          int buffered_time = s.read_us();
  *          wait(0.1f); // give time for the buffer to empty
  *        
  *          s.reset();
- *          printf("Hello World - poll\n");
+ *          printf("Hello World - blocking\n");
  *          int polled_time = s.read_us();
  *          s.stop();
  *          wait(0.1f); // give time for the buffer to empty
  *        
  *          pc.printf("printf buffered took %d us\n", buffered_time);
- *          pc.printf("printf polled took %d us\n", polled_time);
+ *          pc.printf("printf blocking took %d us\n", polled_time);
  *          wait(0.5f);
  *      }
  *  }