Javascript wrappers for HTS221 Sensor library
Dependencies: HTS221
Diff: HTS221_JS-js.cpp
- Revision:
- 0:89911ffe212d
- Child:
- 1:924fb53eb7f8
diff -r 000000000000 -r 89911ffe212d HTS221_JS-js.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/HTS221_JS-js.cpp Tue Oct 10 11:51:26 2017 +0200 @@ -0,0 +1,209 @@ +/** + ****************************************************************************** + * @file HTS221_JS.cpp + * @author ST + * @version V1.0.0 + * @date 9 October 2017 + * @brief Implementation of an HTS221 Humidity and Temperature 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 "HTS221_JS.h" + +#include "mbed.h" + +/* Class Implementation ------------------------------------------------------*/ + +/** + * HTS221_JS#destructor + * + * Called if/when the HTS221_JS is GC'ed. + */ +void NAME_FOR_CLASS_NATIVE_DESTRUCTOR(HTS221_JS)(void *void_ptr) { + delete static_cast<HTS221_JS*>(void_ptr); +} + +/** + * Type infomation of the native HTS221_JS pointer + * + * Set HTS221_JS#destructor as the free callback. + */ +static const jerry_object_native_info_t native_obj_type_info = { + .free_cb = NAME_FOR_CLASS_NATIVE_DESTRUCTOR(HTS221_JS) +}; + + +/** + * HTS221_JS#get_temperature (native JavaScript method) + * + * @returns temperature + */ +DECLARE_CLASS_FUNCTION(HTS221_JS, get_temperature) { + CHECK_ARGUMENT_COUNT(HTS221_JS, get_temperature, (args_count == 0)); + + + // Unwrap native HTS221_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 HTS221_JS pointer"); + } + + HTS221_JS *native_ptr = static_cast<HTS221_JS*>(void_ptr); + + // Get the result from the C++ API + float result = native_ptr->get_temperature(); + + // Cast it back to JavaScript and return + return jerry_create_number(result); + + //return jerry_create_string((unsigned char*)"5C"); +} + + +/** + * HTS221_JS#get_humidity (native JavaScript method) + * + * @returns humidity + */ +DECLARE_CLASS_FUNCTION(HTS221_JS, get_humidity) { + CHECK_ARGUMENT_COUNT(HTS221_JS, get_humidity, (args_count == 0)); + + + // Unwrap native HTS221_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 HTS221_JS pointer"); + } + + HTS221_JS *native_ptr = static_cast<HTS221_JS*>(void_ptr); + + // Get the result from the C++ API + float result = native_ptr->get_humidity(); + + // Cast it back to JavaScript and return + return jerry_create_number(result); + + //return jerry_create_string((unsigned char*)"5C"); +} + +/** + * HTS221_JS#led_on (native JavaScript method) + * @param pin DigitalOut pin to blink + */ +DECLARE_CLASS_FUNCTION(HTS221_JS, led_on) { + // Check that we have 1 argument, and that it's an object + CHECK_ARGUMENT_COUNT(HTS221_JS, led_on, (args_count == 1)); + CHECK_ARGUMENT_TYPE_ALWAYS(HTS221_JS, led_on, 0, object); + + // Unwrap native HTS221_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 HTS221_JS pointer"); + } + + HTS221_JS *native_ptr = static_cast<HTS221_JS*>(void_ptr); + + + // Cast the LED argument + void *led_void_ptr; + const jerry_object_native_info_t *led_type_ptr; + bool led_has_ptr = jerry_get_object_native_pointer(args[0], &led_void_ptr, &led_type_ptr); + + if (!led_has_ptr) { + printf("Not a DigitalOut input!"); + return jerry_create_error(JERRY_ERROR_TYPE, + (const jerry_char_t *) "Failed to get native DigitalOut pointer"); + } + + DigitalOut *pin_ptr = reinterpret_cast<DigitalOut*>(led_void_ptr); + + // Call the function from the C++ API + native_ptr->led_on(*pin_ptr); + + // Return + return jerry_create_undefined(); +} + +/** + * HTS221_JS (native JavaScript constructor) + * + * @returns a JavaScript object representing HTS221_JS. + */ +DECLARE_CLASS_CONSTRUCTOR(HTS221_JS) { + CHECK_ARGUMENT_COUNT(HTS221_JS, __constructor, args_count == 1); + CHECK_ARGUMENT_TYPE_ALWAYS(HTS221_JS, __constructor, 0, object); + + // Extract native DevI2C argument (objects are always pointers) + 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); + + 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"); + } + + DevI2C* devI2c = reinterpret_cast<DevI2C*>(devI2c_ptr); + + + // Extract native HTS221_JS pointer (from this object) + HTS221_JS *native_ptr = new HTS221_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, HTS221_JS, get_temperature); + ATTACH_CLASS_FUNCTION(js_object, HTS221_JS, get_humidity); + ATTACH_CLASS_FUNCTION(js_object, HTS221_JS, led_on); + + return js_object; +} \ No newline at end of file