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mbed SDK library sources

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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@89:9655231f5786, 2014-02-11 (annotated)

Committer:
mbed_official
Date:
Tue Feb 11 15:00:06 2014 +0000
Revision:
89:9655231f5786
Parent:
50:b08ceb75017d 
Synchronized with git revision 17499c34d273f02497e0706d3abc516b12f3fc62



Full URL: https://github.com/mbedmicro/mbed/commit/17499c34d273f02497e0706d3abc516b12f3fc62/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library
bogdanm 13:0645d8841f51 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 13:0645d8841f51 3 *
bogdanm 13:0645d8841f51 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 13:0645d8841f51 5 * you may not use this file except in compliance with the License.
bogdanm 13:0645d8841f51 6 * You may obtain a copy of the License at
bogdanm 13:0645d8841f51 7 *
bogdanm 13:0645d8841f51 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 13:0645d8841f51 9 *
bogdanm 13:0645d8841f51 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 13:0645d8841f51 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 13:0645d8841f51 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 13:0645d8841f51 13 * See the License for the specific language governing permissions and
bogdanm 13:0645d8841f51 14 * limitations under the License.
bogdanm 13:0645d8841f51 15 */
bogdanm 13:0645d8841f51 16 #include "SPI.h"
bogdanm 13:0645d8841f51 17
bogdanm 13:0645d8841f51 18 #if DEVICE_SPI
bogdanm 13:0645d8841f51 19
bogdanm 13:0645d8841f51 20 namespace mbed {
bogdanm 13:0645d8841f51 21
mbed_official 50:b08ceb75017d 22 SPI::SPI(PinName mosi, PinName miso, PinName sclk, PinName _unused) {
bogdanm 13:0645d8841f51 23 spi_init(&_spi, mosi, miso, sclk, NC);
bogdanm 13:0645d8841f51 24 _bits = 8;
bogdanm 13:0645d8841f51 25 _mode = 0;
bogdanm 13:0645d8841f51 26 _hz = 1000000;
bogdanm 13:0645d8841f51 27 spi_format(&_spi, _bits, _mode, 0);
bogdanm 13:0645d8841f51 28 spi_frequency(&_spi, _hz);
bogdanm 13:0645d8841f51 29 }
bogdanm 13:0645d8841f51 30
bogdanm 13:0645d8841f51 31 void SPI::format(int bits, int mode) {
bogdanm 13:0645d8841f51 32 _bits = bits;
bogdanm 13:0645d8841f51 33 _mode = mode;
bogdanm 13:0645d8841f51 34 SPI::_owner = NULL; // Not that elegant, but works. rmeyer
bogdanm 13:0645d8841f51 35 aquire();
bogdanm 13:0645d8841f51 36 }
bogdanm 13:0645d8841f51 37
bogdanm 13:0645d8841f51 38 void SPI::frequency(int hz) {
bogdanm 13:0645d8841f51 39 _hz = hz;
bogdanm 13:0645d8841f51 40 SPI::_owner = NULL; // Not that elegant, but works. rmeyer
bogdanm 13:0645d8841f51 41 aquire();
bogdanm 13:0645d8841f51 42 }
bogdanm 13:0645d8841f51 43
bogdanm 13:0645d8841f51 44 SPI* SPI::_owner = NULL;
bogdanm 13:0645d8841f51 45
bogdanm 13:0645d8841f51 46 // ignore the fact there are multiple physical spis, and always update if it wasnt us last
bogdanm 13:0645d8841f51 47 void SPI::aquire() {
bogdanm 13:0645d8841f51 48 if (_owner != this) {
bogdanm 13:0645d8841f51 49 spi_format(&_spi, _bits, _mode, 0);
bogdanm 13:0645d8841f51 50 spi_frequency(&_spi, _hz);
bogdanm 13:0645d8841f51 51 _owner = this;
bogdanm 13:0645d8841f51 52 }
bogdanm 13:0645d8841f51 53 }
bogdanm 13:0645d8841f51 54
bogdanm 13:0645d8841f51 55 int SPI::write(int value) {
bogdanm 13:0645d8841f51 56 aquire();
bogdanm 13:0645d8841f51 57 return spi_master_write(&_spi, value);
bogdanm 13:0645d8841f51 58 }
bogdanm 13:0645d8841f51 59
bogdanm 13:0645d8841f51 60 } // namespace mbed
bogdanm 13:0645d8841f51 61
bogdanm 13:0645d8841f51 62 #endif