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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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.

Last commit 20 Feb 2019 by mbed official

common/SPI.cpp@9:0ce32e54c9a7, 2013-06-10 (annotated)

Committer:
emilmont
Date:
Mon Jun 10 16:03:00 2013 +0100
Revision:
9:0ce32e54c9a7
Parent:
cpp/SPI.cpp@2:143cac498751
Child:
10:3bc89ef62ce7
Refactoring of the mbed SDK:

- Provide a well defined HAL and API

- Keep separated the HAL implementations for the different targets

Who changed what in which revision?

UserRevisionLine numberNew 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