Diff: HTS221_JS-js.cpp

Revision:

0:89911ffe212d

Child:

1:924fb53eb7f8

--- /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>&copy; 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;
+}
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