mbed library sources modified for open wear
Dependents: openwear-lifelogger-example
Fork of mbed-src by
cpp/SPI.cpp
- Committer:
- mbed_official
- Date:
- 2012-11-20
- Revision:
- 0:fd0d7bdfcdc2
- Child:
- 2:143cac498751
File content as of revision 0:fd0d7bdfcdc2:
/* mbed Microcontroller Library * Copyright (c) 2006-2012 ARM Limited * * 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 "SPI.h" #if DEVICE_SPI namespace mbed { SPI::SPI(PinName mosi, PinName miso, PinName sclk) { spi_init(&_spi, mosi, miso, sclk, NC); _bits = 8; _mode = 0; _hz = 1000000; spi_format(&_spi, _bits, _mode, 0); spi_frequency(&_spi, _hz); } void SPI::format(int bits, int mode) { _bits = bits; _mode = mode; SPI::_owner = NULL; // Not that elegant, but works. rmeyer aquire(); } void SPI::frequency(int hz) { _hz = hz; SPI::_owner = NULL; // Not that elegant, but works. rmeyer aquire(); } SPI* SPI::_owner = NULL; // ignore the fact there are multiple physical spis, and always update if it wasnt us last void SPI::aquire() { if (_owner != this) { spi_format(&_spi, _bits, _mode, 0); spi_frequency(&_spi, _hz); _owner = this; } } int SPI::write(int value) { aquire(); return spi_master_write(&_spi, value); } } // namespace mbed #endif