diff options
| -rw-r--r-- | cores/arduino/HardwareSerial.cpp | 15 | ||||
| -rw-r--r-- | cores/arduino/HardwareSerial.h | 1 | ||||
| -rw-r--r-- | cores/arduino/Stream.cpp | 2 |
3 files changed, 17 insertions, 1 deletions
diff --git a/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp index ed29641..29a3366 100644 --- a/cores/arduino/HardwareSerial.cpp +++ b/cores/arduino/HardwareSerial.cpp @@ -176,6 +176,21 @@ int HardwareSerial::read(void) } } +int HardwareSerial::availableForWrite(void) +{ +#if (SERIAL_TX_BUFFER_SIZE>256) + uint8_t oldSREG = SREG; + cli(); +#endif + tx_buffer_index_t head = _tx_buffer_head; + tx_buffer_index_t tail = _tx_buffer_tail; +#if (SERIAL_TX_BUFFER_SIZE>256) + SREG = oldSREG; +#endif + if (head >= tail) return SERIAL_TX_BUFFER_SIZE - 1 - head + tail; + return tail - head - 1; +} + void HardwareSerial::flush() { // If we have never written a byte, no need to flush. This special diff --git a/cores/arduino/HardwareSerial.h b/cores/arduino/HardwareSerial.h index b96e5d0..935934b 100644 --- a/cores/arduino/HardwareSerial.h +++ b/cores/arduino/HardwareSerial.h @@ -112,6 +112,7 @@ class HardwareSerial : public Stream virtual int available(void); virtual int peek(void); virtual int read(void); + int availableForWrite(void); virtual void flush(void); virtual size_t write(uint8_t); inline size_t write(unsigned long n) { return write((uint8_t)n); } diff --git a/cores/arduino/Stream.cpp b/cores/arduino/Stream.cpp index 39873aa..9c581be 100644 --- a/cores/arduino/Stream.cpp +++ b/cores/arduino/Stream.cpp @@ -75,7 +75,7 @@ void Stream::setTimeout(unsigned long timeout) // sets the maximum number of mi // find returns true if the target string is found bool Stream::find(char *target) { - return findUntil(target, ""); + return findUntil(target, (char*)""); } // reads data from the stream until the target string of given length is found |