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Merge pull request #1166 from alltheblinkythings/SerialStuff

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Always arm the "TX FIFO Empty" interrupt after we write into _tx_buffer.
This commit is contained in:
Ivan Grokhotkov 2015-12-07 22:10:41 +03:00
commit 93aaa8667d
2 changed files with 9 additions and 13 deletions
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5
cores/esp8266/HardwareSerial.cpp
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@ -617,18 +617,15 @@ size_t HardwareSerial::write(uint8_t c) {
size_t room = uart_get_tx_fifo_room(_uart);
if(room > 0 && _tx_buffer->empty()) {
uart_transmit_char(_uart, c);
if(room < 10) {
uart_arm_tx_interrupt(_uart);
}
return 1;
}
while(_tx_buffer->room() == 0) {
yield();
uart_arm_tx_interrupt(_uart);
}
_tx_buffer->write(c);
uart_arm_tx_interrupt(_uart);
return 1;
}

17
cores/esp8266/cbuf.h
View File

@ -42,9 +42,6 @@ class cbuf {
if(_end >= _begin) {
return _size - (_end - _begin) - 1;
}
if(_begin == _end) {
return _size;
}
return _begin - _end - 1;
}
@ -62,7 +59,7 @@ class cbuf {
if(getSize() == 0) return -1;
char result = *_begin;
if(++_begin == _bufend) _begin = _buf;
_begin = wrap_if_bufend(_begin + 1);
return static_cast<int>(result);
}
@ -78,8 +75,7 @@ class cbuf {
dst += top_size;
}
memcpy(dst, _begin, size_to_read);
_begin += size_to_read;
if(_begin == _bufend) _begin = _buf;
_begin = wrap_if_bufend(_begin + size_to_read);
return size_read;
}
@ -87,7 +83,7 @@ class cbuf {
if(room() == 0) return 0;
*_end = c;
if(++_end == _bufend) _end = _buf;
_end = wrap_if_bufend(_end + 1);
return 1;
}
@ -103,8 +99,7 @@ class cbuf {
src += top_size;
}
memcpy(_end, src, size_to_write);
_end += size_to_write;
if(_end == _bufend) _end = _buf;
_end = wrap_if_bufend(_end + size_to_write);
return size_written;
}
@ -114,6 +109,10 @@ class cbuf {
}
private:
inline char* wrap_if_bufend(char* ptr) {
return (ptr == _bufend) ? _buf : ptr;
}
size_t _size;
char* _buf;
char* _bufend;