Javascript wrappers for LSM303AGR Sensor library
Dependencies: LSM303AGR
Diff: LSM303AGR_JS-js.cpp
- Revision:
- 0:23a17bd32990
- Child:
- 1:78c55e099d6c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/LSM303AGR_JS-js.cpp Thu Oct 12 11:09:16 2017 +0200 @@ -0,0 +1,178 @@ +/** + ****************************************************************************** + * @file LSM303AGR_JS-js.cpp + * @author ST + * @version V1.0.0 + * @date 9 October 2017 + * @brief Implementation of an LSM303AGR Accelerometer and Magnetometer 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 "LSM303AGR_JS.h" + +#include "mbed.h" + +/* Class Implementation ------------------------------------------------------*/ + +/** + * LSM303AGR_JS#destructor + * + * Called if/when the LSM303AGR_JS is GC'ed. + */ +void NAME_FOR_CLASS_NATIVE_DESTRUCTOR(LSM303AGR_JS)(void *void_ptr) { + delete static_cast<LSM303AGR_JS*>(void_ptr); +} + + +/** + * Type infomation of the native LSM303AGR_JS pointer + * + * Set LSM303AGR_JS#destructor as the free callback. + */ +static const jerry_object_native_info_t native_obj_type_info = { + .free_cb = NAME_FOR_CLASS_NATIVE_DESTRUCTOR(LSM303AGR_JS) +}; + + +/** + * LSM303AGR_JS#get_accelerometer_axes (native JavaScript method) + * + * @returns accelerometer axes + */ +DECLARE_CLASS_FUNCTION(LSM303AGR_JS, get_accelerometer_axes) { + CHECK_ARGUMENT_COUNT(LSM303AGR_JS, get_accelerometer_axes, (args_count == 0)); + + + // Unwrap native LSM303AGR_JS object + void *void_ptr; + const jerry_object_native_info_t *type_ptr; + bool has_ptr = jerry_get_object_native_pointer(this_obj, &void_ptr, &type_ptr); + + if (!has_ptr || type_ptr != &native_obj_type_info) { + return jerry_create_error(JERRY_ERROR_TYPE, + (const jerry_char_t *) "Failed to get native LSM303AGR_JS pointer"); + } + + LSM303AGR_JS *native_ptr = static_cast<LSM303AGR_JS*>(void_ptr); + + // Get the result from the C++ API + char *result = new char[128]; + native_ptr->get_accelerometer_axes_json(result); + + // Cast it back to JavaScript + jerry_value_t out = jerry_create_string((unsigned char *)result); + + // Recycle the result from function + delete result; + + // Return the output + return out; +} + + +/** + * LSM303AGR_JS#get_magnetometer_axes (native JavaScript method) + * + * @returns Magnetometer axes + */ +DECLARE_CLASS_FUNCTION(LSM303AGR_JS, get_magnetometer_axes) { + CHECK_ARGUMENT_COUNT(LSM303AGR_JS, get_magnetometer_axes, (args_count == 0)); + + + // Unwrap native LSM303AGR_JS object + void *void_ptr; + const jerry_object_native_info_t *type_ptr; + bool has_ptr = jerry_get_object_native_pointer(this_obj, &void_ptr, &type_ptr); + + if (!has_ptr || type_ptr != &native_obj_type_info) { + return jerry_create_error(JERRY_ERROR_TYPE, + (const jerry_char_t *) "Failed to get native LSM303AGR_JS pointer"); + } + + LSM303AGR_JS *native_ptr = static_cast<LSM303AGR_JS*>(void_ptr); + + // Get the result from the C++ API + char *result = new char[128]; + native_ptr->get_magnetometer_axes_json(result); + + // Cast it back to JavaScript + jerry_value_t out = jerry_create_string((unsigned char *)result); + + // Recycle the result from function + delete result; + + // Return the output + return out; +} + +/** + * LSM303AGR_JS (native JavaScript constructor) + * + * @returns a JavaScript object representing LSM303AGR_JS. + */ +DECLARE_CLASS_CONSTRUCTOR(LSM303AGR_JS) { + CHECK_ARGUMENT_COUNT(LSM303AGR_JS, __constructor, args_count == 1); + CHECK_ARGUMENT_TYPE_ALWAYS(LSM303AGR_JS, __constructor, 0, object); + + // Unwrap native LSM303AGR_JS object + void *devI2c_ptr; + const jerry_object_native_info_t *devI2c_type_ptr; + bool devI2c_has_ptr = jerry_get_object_native_pointer(args[0], &devI2c_ptr, &devI2c_type_ptr); + + // Check if we have the i2c pointer + if (!devI2c_has_ptr) { + printf("Not a I2C input!"); + return jerry_create_error(JERRY_ERROR_TYPE, + (const jerry_char_t *) "Failed to get native DigitalOut pointer"); + } + + // Cast the argument to C++ + DevI2C* devI2c = reinterpret_cast<DevI2C*>(devI2c_ptr); + + // Extract native LSM303AGR_JS pointer (from this object) + LSM303AGR_JS *native_ptr = new LSM303AGR_JS(*devI2c); + + jerry_value_t js_object = jerry_create_object(); + jerry_set_object_native_pointer(js_object, native_ptr, &native_obj_type_info); + + // attach methods + ATTACH_CLASS_FUNCTION(js_object, LSM303AGR_JS, get_accelerometer_axes); + ATTACH_CLASS_FUNCTION(js_object, LSM303AGR_JS, get_magnetometer_axes); + + return js_object; +} \ No newline at end of file