mbed official / mbed-src

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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

Last commit 20 Feb 2019 by mbed official

common/SPI.cpp@10:3bc89ef62ce7, 2013-06-14 (annotated)

Committer:
emilmont
Date:
Fri Jun 14 17:49:17 2013 +0100
Revision:
10:3bc89ef62ce7
Parent:
9:0ce32e54c9a7
Child:
13:0645d8841f51
Unify mbed library sources

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 10:3bc89ef62ce7 1 /* mbed Microcontroller Library
emilmont 10:3bc89ef62ce7 2 * Copyright (c) 2006-2013 ARM Limited
emilmont 10:3bc89ef62ce7 3 *
emilmont 10:3bc89ef62ce7 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 10:3bc89ef62ce7 5 * you may not use this file except in compliance with the License.
emilmont 10:3bc89ef62ce7 6 * You may obtain a copy of the License at
emilmont 10:3bc89ef62ce7 7 *
emilmont 10:3bc89ef62ce7 8 * http://www.apache.org/licenses/LICENSE-2.0
emilmont 10:3bc89ef62ce7 9 *
emilmont 10:3bc89ef62ce7 10 * Unless required by applicable law or agreed to in writing, software
emilmont 10:3bc89ef62ce7 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 10:3bc89ef62ce7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 10:3bc89ef62ce7 13 * See the License for the specific language governing permissions and
emilmont 10:3bc89ef62ce7 14 * limitations under the License.
emilmont 10:3bc89ef62ce7 15 */
emilmont 10:3bc89ef62ce7 16 #include "SPI.h"
emilmont 10:3bc89ef62ce7 17
emilmont 10:3bc89ef62ce7 18 #if DEVICE_SPI
emilmont 10:3bc89ef62ce7 19
emilmont 10:3bc89ef62ce7 20 namespace mbed {
emilmont 10:3bc89ef62ce7 21
emilmont 10:3bc89ef62ce7 22 SPI::SPI(PinName mosi, PinName miso, PinName sclk) {
emilmont 10:3bc89ef62ce7 23 spi_init(&_spi, mosi, miso, sclk, NC);
emilmont 10:3bc89ef62ce7 24 _bits = 8;
emilmont 10:3bc89ef62ce7 25 _mode = 0;
emilmont 10:3bc89ef62ce7 26 _hz = 1000000;
emilmont 10:3bc89ef62ce7 27 spi_format(&_spi, _bits, _mode, 0);
emilmont 10:3bc89ef62ce7 28 spi_frequency(&_spi, _hz);
emilmont 10:3bc89ef62ce7 29 }
emilmont 10:3bc89ef62ce7 30
emilmont 10:3bc89ef62ce7 31 void SPI::format(int bits, int mode) {
emilmont 10:3bc89ef62ce7 32 _bits = bits;
emilmont 10:3bc89ef62ce7 33 _mode = mode;
emilmont 10:3bc89ef62ce7 34 SPI::_owner = NULL; // Not that elegant, but works. rmeyer
emilmont 10:3bc89ef62ce7 35 aquire();
emilmont 10:3bc89ef62ce7 36 }
emilmont 10:3bc89ef62ce7 37
emilmont 10:3bc89ef62ce7 38 void SPI::frequency(int hz) {
emilmont 10:3bc89ef62ce7 39 _hz = hz;
emilmont 10:3bc89ef62ce7 40 SPI::_owner = NULL; // Not that elegant, but works. rmeyer
emilmont 10:3bc89ef62ce7 41 aquire();
emilmont 10:3bc89ef62ce7 42 }
emilmont 10:3bc89ef62ce7 43
emilmont 10:3bc89ef62ce7 44 SPI* SPI::_owner = NULL;
emilmont 10:3bc89ef62ce7 45
emilmont 10:3bc89ef62ce7 46 // ignore the fact there are multiple physical spis, and always update if it wasnt us last
emilmont 10:3bc89ef62ce7 47 void SPI::aquire() {
emilmont 10:3bc89ef62ce7 48 if (_owner != this) {
emilmont 10:3bc89ef62ce7 49 spi_format(&_spi, _bits, _mode, 0);
emilmont 10:3bc89ef62ce7 50 spi_frequency(&_spi, _hz);
emilmont 10:3bc89ef62ce7 51 _owner = this;
emilmont 10:3bc89ef62ce7 52 }
emilmont 10:3bc89ef62ce7 53 }
emilmont 10:3bc89ef62ce7 54
emilmont 10:3bc89ef62ce7 55 int SPI::write(int value) {
emilmont 10:3bc89ef62ce7 56 aquire();
emilmont 10:3bc89ef62ce7 57 return spi_master_write(&_spi, value);
emilmont 10:3bc89ef62ce7 58 }
emilmont 10:3bc89ef62ce7 59
emilmont 10:3bc89ef62ce7 60 } // namespace mbed
emilmont 10:3bc89ef62ce7 61
emilmont 10:3bc89ef62ce7 62 #endif