Rigado / mbed-src-bmd-200

mbed-src updated for BMD-200 evaluation board. Just pin numbers are updated.

Dependents:   mbed_blinky-bmd-200 bmd-200_accel_demo firstRig

Fork of mbed-src by mbed official

Replacement for the "mbed" or "mbed-src" library when using the BMD-200 Evaluation kit. This library only remaps the pin names (i.e. LED1 points to p0.01 instead of p0.18, etc) as used by the BMD-200 Evaluation board (select the nRF51822_mkit platform). All other code is untouched.

common/SPI.cpp

Committer:
emilmont
Date:
2013-06-10
Revision:
9:0ce32e54c9a7
Parent:
cpp/SPI.cpp@ 2:143cac498751
Child:
10:3bc89ef62ce7

File content as of revision 9:0ce32e54c9a7:

/* 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