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.cpp

Revision:
8:506247a040bc
Parent:
7:6fa214b41d73
Child:
10:9ee15ae3d1a3
diff -r 6fa214b41d73 -r 506247a040bc BufferedSerial.cpp
--- a/BufferedSerial.cpp	Fri Jan 02 03:47:26 2015 +0000
+++ b/BufferedSerial.cpp	Sun Jan 04 22:15:53 2015 +0000
@@ -24,7 +24,7 @@
 #include <stdarg.h>
 
 BufferedSerial::BufferedSerial(PinName tx, PinName rx, const char* name)
-    : SERIAL_BASE(tx, rx), _rxbuf(BUFFEREDSERIAL_MAX_BUFFER_SIZE), _txbuf(BUFFEREDSERIAL_MAX_BUFFER_SIZE)
+    : SERIAL_BASE(tx, rx) , _rxbuf(2*BUFFEREDSERIAL_MAX_BUFFER_SIZE), _txbuf(2*BUFFEREDSERIAL_MAX_BUFFER_SIZE)
 {
     SERIAL_BASE::attach(this, &BufferedSerial::rxIrq, Serial::RxIrq);