mbed library sources
Dependents: frdm_kl05z_gpio_test
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Diff: common/SPI.cpp
- Revision:
- 9:0ce32e54c9a7
- Parent:
- 2:143cac498751
- Child:
- 10:3bc89ef62ce7
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/common/SPI.cpp Mon Jun 10 16:03:00 2013 +0100 @@ -0,0 +1,62 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include "SPI.h" + +#if DEVICE_SPI + +namespace mbed { + +SPI::SPI(PinName mosi, PinName miso, PinName sclk) { + spi_init(&_spi, mosi, miso, sclk, NC); + _bits = 8; + _mode = 0; + _hz = 1000000; + spi_format(&_spi, _bits, _mode, 0); + spi_frequency(&_spi, _hz); +} + +void SPI::format(int bits, int mode) { + _bits = bits; + _mode = mode; + SPI::_owner = NULL; // Not that elegant, but works. rmeyer + aquire(); +} + +void SPI::frequency(int hz) { + _hz = hz; + SPI::_owner = NULL; // Not that elegant, but works. rmeyer + aquire(); +} + +SPI* SPI::_owner = NULL; + +// ignore the fact there are multiple physical spis, and always update if it wasnt us last +void SPI::aquire() { + if (_owner != this) { + spi_format(&_spi, _bits, _mode, 0); + spi_frequency(&_spi, _hz); + _owner = this; + } +} + +int SPI::write(int value) { + aquire(); + return spi_master_write(&_spi, value); +} + +} // namespace mbed + +#endif