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
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:
- 9:2cb30392ade6
- Parent:
- 8:506247a040bc
- Child:
- 10:9ee15ae3d1a3
--- a/BufferedSerial.h Sun Jan 04 22:15:53 2015 +0000 +++ b/BufferedSerial.h Sun Jan 04 23:27:53 2015 +0000 @@ -31,7 +31,7 @@ #define SERIAL_BASE RawSerial // Internal buffer size (Ring buffers will be 2X this value each for RX and TX...) -#define BUFFEREDSERIAL_MAX_BUFFER_SIZE 4096 +#define BUFFEREDSERIAL_MAX_BUFFER_SIZE 512 /** A serial port (UART) for communication with other serial devices *