Yihui Xiong / BLE_NODE_TEST

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Dependencies:   BLE_API nRF51822

Fork of BLE_LoopbackUART by Bluetooth Low Energy

mbed-src/common/SPI.cpp@9:05f0b5a3a70a, 2014-10-29 (annotated)

Committer:
yihui
Date:
Wed Oct 29 06:23:47 2014 +0000
Revision:
9:05f0b5a3a70a
initial

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yihui 9:05f0b5a3a70a 1 /* mbed Microcontroller Library
yihui 9:05f0b5a3a70a 2 * Copyright (c) 2006-2013 ARM Limited
yihui 9:05f0b5a3a70a 3 *
yihui 9:05f0b5a3a70a 4 * Licensed under the Apache License, Version 2.0 (the "License");
yihui 9:05f0b5a3a70a 5 * you may not use this file except in compliance with the License.
yihui 9:05f0b5a3a70a 6 * You may obtain a copy of the License at
yihui 9:05f0b5a3a70a 7 *
yihui 9:05f0b5a3a70a 8 * http://www.apache.org/licenses/LICENSE-2.0
yihui 9:05f0b5a3a70a 9 *
yihui 9:05f0b5a3a70a 10 * Unless required by applicable law or agreed to in writing, software
yihui 9:05f0b5a3a70a 11 * distributed under the License is distributed on an "AS IS" BASIS,
yihui 9:05f0b5a3a70a 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
yihui 9:05f0b5a3a70a 13 * See the License for the specific language governing permissions and
yihui 9:05f0b5a3a70a 14 * limitations under the License.
yihui 9:05f0b5a3a70a 15 */
yihui 9:05f0b5a3a70a 16 #include "SPI.h"
yihui 9:05f0b5a3a70a 17
yihui 9:05f0b5a3a70a 18 #if DEVICE_SPI
yihui 9:05f0b5a3a70a 19
yihui 9:05f0b5a3a70a 20 namespace mbed {
yihui 9:05f0b5a3a70a 21
yihui 9:05f0b5a3a70a 22 SPI::SPI(PinName mosi, PinName miso, PinName sclk, PinName _unused) :
yihui 9:05f0b5a3a70a 23 _spi(),
yihui 9:05f0b5a3a70a 24 _bits(8),
yihui 9:05f0b5a3a70a 25 _mode(0),
yihui 9:05f0b5a3a70a 26 _hz(1000000) {
yihui 9:05f0b5a3a70a 27 spi_init(&_spi, mosi, miso, sclk, NC);
yihui 9:05f0b5a3a70a 28 spi_format(&_spi, _bits, _mode, 0);
yihui 9:05f0b5a3a70a 29 spi_frequency(&_spi, _hz);
yihui 9:05f0b5a3a70a 30 }
yihui 9:05f0b5a3a70a 31
yihui 9:05f0b5a3a70a 32 void SPI::format(int bits, int mode) {
yihui 9:05f0b5a3a70a 33 _bits = bits;
yihui 9:05f0b5a3a70a 34 _mode = mode;
yihui 9:05f0b5a3a70a 35 SPI::_owner = NULL; // Not that elegant, but works. rmeyer
yihui 9:05f0b5a3a70a 36 aquire();
yihui 9:05f0b5a3a70a 37 }
yihui 9:05f0b5a3a70a 38
yihui 9:05f0b5a3a70a 39 void SPI::frequency(int hz) {
yihui 9:05f0b5a3a70a 40 _hz = hz;
yihui 9:05f0b5a3a70a 41 SPI::_owner = NULL; // Not that elegant, but works. rmeyer
yihui 9:05f0b5a3a70a 42 aquire();
yihui 9:05f0b5a3a70a 43 }
yihui 9:05f0b5a3a70a 44
yihui 9:05f0b5a3a70a 45 SPI* SPI::_owner = NULL;
yihui 9:05f0b5a3a70a 46
yihui 9:05f0b5a3a70a 47 // ignore the fact there are multiple physical spis, and always update if it wasnt us last
yihui 9:05f0b5a3a70a 48 void SPI::aquire() {
yihui 9:05f0b5a3a70a 49 if (_owner != this) {
yihui 9:05f0b5a3a70a 50 spi_format(&_spi, _bits, _mode, 0);
yihui 9:05f0b5a3a70a 51 spi_frequency(&_spi, _hz);
yihui 9:05f0b5a3a70a 52 _owner = this;
yihui 9:05f0b5a3a70a 53 }
yihui 9:05f0b5a3a70a 54 }
yihui 9:05f0b5a3a70a 55
yihui 9:05f0b5a3a70a 56 int SPI::write(int value) {
yihui 9:05f0b5a3a70a 57 aquire();
yihui 9:05f0b5a3a70a 58 return spi_master_write(&_spi, value);
yihui 9:05f0b5a3a70a 59 }
yihui 9:05f0b5a3a70a 60
yihui 9:05f0b5a3a70a 61 } // namespace mbed
yihui 9:05f0b5a3a70a 62
yihui 9:05f0b5a3a70a 63 #endif