Prof Greg Egan / Mbed 2 deprecated UAVXArm-GKE

UAVX Multicopter Flight Controller.

Dependencies:   mbed

Methods/.svn/text-base/sb_getc.cpp.svn-base@2:90292f8bd179, 2011-04-26 (annotated)

Committer:
gke
Date:
Tue Apr 26 12:12:29 2011 +0000
Revision:
2:90292f8bd179
Parent:
1:1e3318a30ddd 
Not flightworthy. Posted for others to make use of the I2C SW code.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
gke 1:1e3318a30ddd 1 /*
gke 1:1e3318a30ddd 2 Copyright (c) 2010 Andy Kirkham
gke 1:1e3318a30ddd 3
gke 1:1e3318a30ddd 4 Permission is hereby granted, free of charge, to any person obtaining a copy
gke 1:1e3318a30ddd 5 of this software and associated documentation files (the "Software"), to deal
gke 1:1e3318a30ddd 6 in the Software without restriction, including without limitation the rights
gke 1:1e3318a30ddd 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
gke 1:1e3318a30ddd 8 copies of the Software, and to permit persons to whom the Software is
gke 1:1e3318a30ddd 9 furnished to do so, subject to the following conditions:
gke 1:1e3318a30ddd 10
gke 1:1e3318a30ddd 11 The above copyright notice and this permission notice shall be included in
gke 1:1e3318a30ddd 12 all copies or substantial portions of the Software.
gke 1:1e3318a30ddd 13
gke 1:1e3318a30ddd 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
gke 1:1e3318a30ddd 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
gke 1:1e3318a30ddd 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
gke 1:1e3318a30ddd 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
gke 1:1e3318a30ddd 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
gke 1:1e3318a30ddd 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
gke 1:1e3318a30ddd 20 THE SOFTWARE.
gke 1:1e3318a30ddd 21 */
gke 1:1e3318a30ddd 22
gke 1:1e3318a30ddd 23 #include "../SerialBuffered.h"
gke 1:1e3318a30ddd 24 #include "../sb_globals.h"
gke 1:1e3318a30ddd 25
gke 1:1e3318a30ddd 26 int SerialBuffered::getc(bool blocking) {
gke 1:1e3318a30ddd 27 char c;
gke 1:1e3318a30ddd 28
gke 1:1e3318a30ddd 29 if (blocking) while (_rx_buffer_out[uart_number] == _rx_buffer_in[uart_number] && !_rx_buffer_full[uart_number]) ; /* Blocks! */
gke 1:1e3318a30ddd 30 else if (_rx_buffer_in[uart_number] == _rx_buffer_out[uart_number] && !_rx_buffer_full[uart_number]) return -1;
gke 1:1e3318a30ddd 31
gke 1:1e3318a30ddd 32 c = _rx_buffer[uart_number][_rx_buffer_out[uart_number]++];
gke 1:1e3318a30ddd 33 if (_rx_buffer_out[uart_number] >= _rx_buffer_size[uart_number]) {
gke 1:1e3318a30ddd 34 _rx_buffer_out[uart_number] = 0;
gke 1:1e3318a30ddd 35 }
gke 1:1e3318a30ddd 36 if (_rx_buffer_full[uart_number]) _rx_buffer_full[uart_number] = false;
gke 1:1e3318a30ddd 37 return (int)c;
gke 1:1e3318a30ddd 38 }
gke 1:1e3318a30ddd 39
gke 1:1e3318a30ddd 40 char SerialBuffered::getc(void) {
gke 1:1e3318a30ddd 41 return (char)getc(true);
gke 1:1e3318a30ddd 42 }
gke 1:1e3318a30ddd 43
gke 1:1e3318a30ddd 44 int SerialBuffered::readable(void) {
gke 1:1e3318a30ddd 45 return (_rx_buffer_full[uart_number] || _rx_buffer_overflow[uart_number] || _rx_buffer_in[uart_number] != _rx_buffer_out[uart_number]) ? 1 : 0;
gke 1:1e3318a30ddd 46 }