Javascript wrapper for SPI in Mbed OS.
Diff: SPI-js.cpp
- Revision:
- 0:3a79326cadb9
- Child:
- 1:1e016cfcd06f
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SPI-js.cpp Tue Oct 31 16:15:12 2017 +0100 @@ -0,0 +1,103 @@ +/** + ****************************************************************************** + * @file LSM6DSL_JS-js.cpp + * @author ST + * @version V1.0.0 + * @date 25 October 2017 + * @brief Implementation of an LSM6DSL Accelerometer and gyroscope sensor for + * use with Javascript. + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. Neither the name of STMicroelectronics nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************** + */ + + +/* Includes ------------------------------------------------------------------*/ + +#include "jerryscript-mbed-util/logging.h" +#include "jerryscript-mbed-library-registry/wrap_tools.h" + +// Load the library that we'll wrap +#include "SPI.h" + +#include "mbed.h" + +/* Class Implementation ------------------------------------------------------*/ + +/** + * SPI#destructor + * + * Called if/when the SPI object is GC'ed. + */ +void NAME_FOR_CLASS_NATIVE_DESTRUCTOR(SPI) (void *void_ptr) { + delete static_cast<SPI*>(void_ptr); +} + +/** + * Type infomation of the native SPI pointer + * + * Set SPI#destructor as the free callback. + */ +static const jerry_object_native_info_t native_obj_type_info = { + .free_cb = NAME_FOR_CLASS_NATIVE_DESTRUCTOR(SPI) +}; + +/** + * SPI (native JavaScript constructor) + * + * @param sda mbed pin for SPI data + * @param scl mbed pin for SPI clock + * @returns a JavaScript object representing the SPI bus. + */ +DECLARE_CLASS_CONSTRUCTOR(SPI) { + CHECK_ARGUMENT_COUNT(SPI, __constructor, (args_count == 3)); + CHECK_ARGUMENT_TYPE_ALWAYS(SPI, __constructor, 0, number); + CHECK_ARGUMENT_TYPE_ALWAYS(SPI, __constructor, 1, number); + CHECK_ARGUMENT_TYPE_ALWAYS(SPI, __constructor, 2, number); + + int mosi = jerry_get_number_value(args[0]); + int miso = jerry_get_number_value(args[1]); + int sclk = jerry_get_number_value(args[2]); + + SPI *native_ptr = new SPI((PinName)mosi, (PinName)miso, (PinName)sclk); + + jerry_value_t js_object = jerry_create_object(); + jerry_set_object_native_pointer(js_object, native_ptr, &native_obj_type_info); + + /* + //Future upgrades + ATTACH_CLASS_FUNCTION(js_object, SPI, frequency); + ATTACH_CLASS_FUNCTION(js_object, SPI, read); + ATTACH_CLASS_FUNCTION(js_object, SPI, write); + ATTACH_CLASS_FUNCTION(js_object, SPI, start); + ATTACH_CLASS_FUNCTION(js_object, SPI, stop); + */ + + return js_object; + +}