Test code for Grove Node BLE
Dependencies: BLE_API nRF51822
Fork of BLE_LoopbackUART by
SPI.cpp
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2006-2013 ARM Limited 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 #include "SPI.h" 00017 00018 #if DEVICE_SPI 00019 00020 namespace mbed { 00021 00022 SPI::SPI(PinName mosi, PinName miso, PinName sclk, PinName _unused) : 00023 _spi(), 00024 _bits(8), 00025 _mode(0), 00026 _hz(1000000) { 00027 spi_init(&_spi, mosi, miso, sclk, NC); 00028 spi_format(&_spi, _bits, _mode, 0); 00029 spi_frequency(&_spi, _hz); 00030 } 00031 00032 void SPI::format(int bits, int mode) { 00033 _bits = bits; 00034 _mode = mode; 00035 SPI::_owner = NULL; // Not that elegant, but works. rmeyer 00036 aquire(); 00037 } 00038 00039 void SPI::frequency(int hz) { 00040 _hz = hz; 00041 SPI::_owner = NULL; // Not that elegant, but works. rmeyer 00042 aquire(); 00043 } 00044 00045 SPI* SPI::_owner = NULL; 00046 00047 // ignore the fact there are multiple physical spis, and always update if it wasnt us last 00048 void SPI::aquire() { 00049 if (_owner != this) { 00050 spi_format(&_spi, _bits, _mode, 0); 00051 spi_frequency(&_spi, _hz); 00052 _owner = this; 00053 } 00054 } 00055 00056 int SPI::write(int value) { 00057 aquire(); 00058 return spi_master_write(&_spi, value); 00059 } 00060 00061 } // namespace mbed 00062 00063 #endif
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