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:
- 12:a0d37088b405
- Parent:
- 11:779304f9c5d2
- Child:
- 13:c17c532bc4f8
--- a/BufferedSerial.h Sun Jul 26 21:53:11 2015 +0000 +++ b/BufferedSerial.h Mon Mar 07 21:10:27 2016 +0000 @@ -25,7 +25,7 @@ #define BUFFEREDSERIAL_H #include "mbed.h" -#include "Buffer.h" +#include "MyBuffer.h" /** A serial port (UART) for communication with other serial devices * @@ -71,8 +71,8 @@ class BufferedSerial : public RawSerial { private: - Buffer <char> _rxbuf; - Buffer <char> _txbuf; + MyBuffer <char> _rxbuf; + MyBuffer <char> _txbuf; uint32_t _buf_size; uint32_t _tx_multiple;