1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2013 ARM Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
22 SPI::SPI(PinName mosi, PinName miso, PinName sclk, PinName _unused) :
27 spi_init(&_spi, mosi, miso, sclk, NC);
28 spi_format(&_spi, _bits, _mode, 0);
29 spi_frequency(&_spi, _hz);
32 void SPI::format(int bits, int mode) {
35 SPI::_owner = NULL; // Not that elegant, but works. rmeyer
39 void SPI::frequency(int hz) {
41 SPI::_owner = NULL; // Not that elegant, but works. rmeyer
45 SPI* SPI::_owner = NULL;
47 // ignore the fact there are multiple physical spis, and always update if it wasnt us last
50 spi_format(&_spi, _bits, _mode, 0);
51 spi_frequency(&_spi, _hz);
56 int SPI::write(int value) {
58 return spi_master_write(&_spi, value);