mbed library sources
Dependents: Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more
Superseded
This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.
Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.
If you are looking for a stable and tested release, please import one of the official mbed library releases:
Import librarymbed
The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.
Diff: cpp/SPI.cpp
- Revision:
- 0:fd0d7bdfcdc2
- Child:
- 2:143cac498751
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/cpp/SPI.cpp Tue Nov 20 17:24:08 2012 +0000 @@ -0,0 +1,68 @@ +/* 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