rooty/Arduino
1
0
Fork 0
mirror of https://github.com/arduino/Arduino.git synced 2024-11-29 10:24:12 +01:00
Code Issues Releases Activity

Merge pull request #2193 from PaulStoffregen/ide-1.5.x

Browse Source 
Add availableForWrite() to HardwareSerial
This commit is contained in:
Cristian Maglie 2014-07-19 09:27:28 +02:00
commit e5c7cb9de1
3 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
build/shared/lib/keywords.txt
View File

@ -177,6 +177,7 @@ read KEYWORD2 Serial_Read
print KEYWORD2 Serial_Print
println KEYWORD2 Serial_Println
available KEYWORD2 Serial_Available
availableForWrite KEYWORD2
flush KEYWORD2 Serial_Flush
setTimeout KEYWORD2
find KEYWORD2

15
hardware/arduino/avr/cores/arduino/HardwareSerial.cpp
View File

@ -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

1
hardware/arduino/avr/cores/arduino/HardwareSerial.h
View File

@ -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); }