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);
     }
 }

Files at this revision

API Documentation at this revision

Revision 5:4d6a311fc8bf, committed 2014-03-24

Comitter:
sam_grove
Date:
Mon Mar 24 19:56:57 2014 +0000
Parent:
4:2ba4d2e1f05d
Child:
6:8287e83943f0
Commit message:
Updated example in documentation. Tested with mbed.bld 81 and works with LPC1768, LPC11U24, KL25Z, KL46Z, KL05Z

Changed in this revision

BufferedSerial.h Show annotated file Show diff for this revision Revisions of this file 
--- 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);
  *      }
  *  }