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:
- 1:57a11fb5d529
- Parent:
- 0:a977d0a3d81e
- Child:
- 2:7e8a450a9101
diff -r a977d0a3d81e -r 57a11fb5d529 BufferedSerial.h --- a/BufferedSerial.h Thu May 23 19:31:30 2013 +0000 +++ b/BufferedSerial.h Thu May 23 23:47:04 2013 +0000 @@ -78,6 +78,7 @@ void rxIrq(void); void txIrq(void); + void prime(void); public: /** Create a BufferedSerial port, connected to the specified transmit and receive pins