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UAVX Multicopter Flight Controller.
Diff: Methods/sb_getc.cpp
- Revision:
- 0:62a1c91a859a
diff -r 000000000000 -r 62a1c91a859a Methods/sb_getc.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Methods/sb_getc.cpp Fri Feb 18 22:28:05 2011 +0000 @@ -0,0 +1,46 @@ +/* + Copyright (c) 2010 Andy Kirkham + + Permission is hereby granted, free of charge, to any person obtaining a copy + of this software and associated documentation files (the "Software"), to deal + in the Software without restriction, including without limitation the rights + to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + copies of the Software, and to permit persons to whom the Software is + furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be included in + all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + THE SOFTWARE. +*/ + +#include "../SerialBuffered.h" +#include "../sb_globals.h" + +int SerialBuffered::getc(bool blocking) { + char c; + + if (blocking) while (_rx_buffer_out[uart_number] == _rx_buffer_in[uart_number] && !_rx_buffer_full[uart_number]) ; /* Blocks! */ + else if (_rx_buffer_in[uart_number] == _rx_buffer_out[uart_number] && !_rx_buffer_full[uart_number]) return -1; + + c = _rx_buffer[uart_number][_rx_buffer_out[uart_number]++]; + if (_rx_buffer_out[uart_number] >= _rx_buffer_size[uart_number]) { + _rx_buffer_out[uart_number] = 0; + } + if (_rx_buffer_full[uart_number]) _rx_buffer_full[uart_number] = false; + return (int)c; +} + +char SerialBuffered::getc(void) { + return (char)getc(true); +} + +int SerialBuffered::readable(void) { + return (_rx_buffer_full[uart_number] || _rx_buffer_overflow[uart_number] || _rx_buffer_in[uart_number] != _rx_buffer_out[uart_number]) ? 1 : 0; +}