mbed library sources
cpp/SPI.cpp@2:143cac498751, 2013-02-18 (annotated)
- Committer:
- emilmont
- Date:
- Mon Feb 18 11:44:18 2013 +0000
- Revision:
- 2:143cac498751
- Parent:
- 0:fd0d7bdfcdc2
Update mbed sources to Rev 59
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 0:fd0d7bdfcdc2 | 1 | /* mbed Microcontroller Library |
emilmont | 2:143cac498751 | 2 | * Copyright (c) 2006-2013 ARM Limited |
mbed_official | 0:fd0d7bdfcdc2 | 3 | * |
emilmont | 2:143cac498751 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
emilmont | 2:143cac498751 | 5 | * you may not use this file except in compliance with the License. |
emilmont | 2:143cac498751 | 6 | * You may obtain a copy of the License at |
mbed_official | 0:fd0d7bdfcdc2 | 7 | * |
emilmont | 2:143cac498751 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
mbed_official | 0:fd0d7bdfcdc2 | 9 | * |
emilmont | 2:143cac498751 | 10 | * Unless required by applicable law or agreed to in writing, software |
emilmont | 2:143cac498751 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
emilmont | 2:143cac498751 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
emilmont | 2:143cac498751 | 13 | * See the License for the specific language governing permissions and |
emilmont | 2:143cac498751 | 14 | * limitations under the License. |
mbed_official | 0:fd0d7bdfcdc2 | 15 | */ |
mbed_official | 0:fd0d7bdfcdc2 | 16 | #include "SPI.h" |
mbed_official | 0:fd0d7bdfcdc2 | 17 | |
mbed_official | 0:fd0d7bdfcdc2 | 18 | #if DEVICE_SPI |
mbed_official | 0:fd0d7bdfcdc2 | 19 | |
mbed_official | 0:fd0d7bdfcdc2 | 20 | namespace mbed { |
mbed_official | 0:fd0d7bdfcdc2 | 21 | |
mbed_official | 0:fd0d7bdfcdc2 | 22 | SPI::SPI(PinName mosi, PinName miso, PinName sclk) { |
mbed_official | 0:fd0d7bdfcdc2 | 23 | spi_init(&_spi, mosi, miso, sclk, NC); |
mbed_official | 0:fd0d7bdfcdc2 | 24 | _bits = 8; |
mbed_official | 0:fd0d7bdfcdc2 | 25 | _mode = 0; |
mbed_official | 0:fd0d7bdfcdc2 | 26 | _hz = 1000000; |
mbed_official | 0:fd0d7bdfcdc2 | 27 | spi_format(&_spi, _bits, _mode, 0); |
mbed_official | 0:fd0d7bdfcdc2 | 28 | spi_frequency(&_spi, _hz); |
mbed_official | 0:fd0d7bdfcdc2 | 29 | } |
mbed_official | 0:fd0d7bdfcdc2 | 30 | |
mbed_official | 0:fd0d7bdfcdc2 | 31 | void SPI::format(int bits, int mode) { |
mbed_official | 0:fd0d7bdfcdc2 | 32 | _bits = bits; |
mbed_official | 0:fd0d7bdfcdc2 | 33 | _mode = mode; |
mbed_official | 0:fd0d7bdfcdc2 | 34 | SPI::_owner = NULL; // Not that elegant, but works. rmeyer |
mbed_official | 0:fd0d7bdfcdc2 | 35 | aquire(); |
mbed_official | 0:fd0d7bdfcdc2 | 36 | } |
mbed_official | 0:fd0d7bdfcdc2 | 37 | |
emilmont | 2:143cac498751 | 38 | void SPI::frequency(int hz) { |
mbed_official | 0:fd0d7bdfcdc2 | 39 | _hz = hz; |
mbed_official | 0:fd0d7bdfcdc2 | 40 | SPI::_owner = NULL; // Not that elegant, but works. rmeyer |
mbed_official | 0:fd0d7bdfcdc2 | 41 | aquire(); |
mbed_official | 0:fd0d7bdfcdc2 | 42 | } |
mbed_official | 0:fd0d7bdfcdc2 | 43 | |
mbed_official | 0:fd0d7bdfcdc2 | 44 | SPI* SPI::_owner = NULL; |
mbed_official | 0:fd0d7bdfcdc2 | 45 | |
mbed_official | 0:fd0d7bdfcdc2 | 46 | // ignore the fact there are multiple physical spis, and always update if it wasnt us last |
mbed_official | 0:fd0d7bdfcdc2 | 47 | void SPI::aquire() { |
mbed_official | 0:fd0d7bdfcdc2 | 48 | if (_owner != this) { |
mbed_official | 0:fd0d7bdfcdc2 | 49 | spi_format(&_spi, _bits, _mode, 0); |
mbed_official | 0:fd0d7bdfcdc2 | 50 | spi_frequency(&_spi, _hz); |
mbed_official | 0:fd0d7bdfcdc2 | 51 | _owner = this; |
mbed_official | 0:fd0d7bdfcdc2 | 52 | } |
mbed_official | 0:fd0d7bdfcdc2 | 53 | } |
mbed_official | 0:fd0d7bdfcdc2 | 54 | |
mbed_official | 0:fd0d7bdfcdc2 | 55 | int SPI::write(int value) { |
mbed_official | 0:fd0d7bdfcdc2 | 56 | aquire(); |
mbed_official | 0:fd0d7bdfcdc2 | 57 | return spi_master_write(&_spi, value); |
mbed_official | 0:fd0d7bdfcdc2 | 58 | } |
mbed_official | 0:fd0d7bdfcdc2 | 59 | |
mbed_official | 0:fd0d7bdfcdc2 | 60 | } // namespace mbed |
mbed_official | 0:fd0d7bdfcdc2 | 61 | |
mbed_official | 0:fd0d7bdfcdc2 | 62 | #endif |