BufferedSerial - Inherit from Serial and use software buffers for …

Users » sam_grove » Code » 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);
     }
 }

Buffer.lib@4:2ba4d2e1f05d, 2013-12-30 (annotated)

Committer:: sam_grove
Date:: Mon Dec 30 18:16:39 2013 +0000
Revision:: 4:2ba4d2e1f05d
Child:: 10:9ee15ae3d1a3

Disable TX IRQ when nothing is left in the buffer (FRDM support). Tested example program with KL46Z, KL25Z and LPC11U24. LPC1768 doesn't work. Need to investigate.