Javascript wrappers for HTS221 Sensor library
Dependencies: HTS221
Diff: HTS221_JS-js.cpp
- Revision:
- 5:bbe15d3cac27
- Parent:
- 4:6043b9511072
- Child:
- 6:b2c4b0678856
diff -r 6043b9511072 -r bbe15d3cac27 HTS221_JS-js.cpp --- a/HTS221_JS-js.cpp Wed Oct 25 13:58:13 2017 +0200 +++ b/HTS221_JS-js.cpp Tue Oct 31 16:18:15 2017 +0100 @@ -51,7 +51,6 @@ /** * HTS221_JS#destructor - * * Called if/when the HTS221_JS is GC'ed. */ void NAME_FOR_CLASS_NATIVE_DESTRUCTOR(HTS221_JS)(void *void_ptr) { @@ -60,18 +59,122 @@ /** * 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#init_spi (native JavaScript method) + * @brief Initializes the sensor using SPI interface + * @param SPI interface + * @param CS pin + * @param DRDY pin + */ +DECLARE_CLASS_FUNCTION(HTS221_JS, init_spi) { + CHECK_ARGUMENT_COUNT(HTS221_JS, init_spi, (args_count == 1 || args_count == 3)); + CHECK_ARGUMENT_TYPE_ALWAYS(HTS221_JS, init_spi, 0, object); + CHECK_ARGUMENT_TYPE_ON_CONDITION(HTS221_JS, init_spi, 1, number, args_count == 3); + CHECK_ARGUMENT_TYPE_ON_CONDITION(HTS221_JS, init_spi, 2, number, args_count == 3); + + // 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); + + // Unwrap arguments + void *spi_ptr; + const jerry_object_native_info_t *spi_type_ptr; + bool spi_has_ptr = jerry_get_object_native_pointer(args[0], &spi_ptr, &spi_type_ptr); + + // Check if we have the spi pointer + if (!spi_has_ptr) { + printf("Not a SPI input!"); + return jerry_create_error(JERRY_ERROR_TYPE, + (const jerry_char_t *) "Failed to get native DigitalOut pointer"); + } + + // Cast the argument to C++ + SPI* spi = reinterpret_cast<SPI*>(spi_ptr); + + // Call the native function + if(args_count == 1){ + native_ptr->init(*spi); + } + else if(args_count == 3){ + int cs_pin = jerry_get_number_value(args[1]); + int drdy_pin = jerry_get_number_value(args[2]); + native_ptr->init(*spi, (PinName) cs_pin, (PinName) drdy_pin); + } + + return jerry_create_number(0); +} + +/** + * HTS221_JS#init_i2c (native JavaScript method) + * @brief Initializes the sensor using I2C interface + * @param I2C interface + * @param Address + * @param DRDY pin + */ +DECLARE_CLASS_FUNCTION(HTS221_JS, init_i2c) { + CHECK_ARGUMENT_COUNT(HTS221_JS, init_i2c, (args_count == 1 || args_count == 3)); + CHECK_ARGUMENT_TYPE_ALWAYS(HTS221_JS, init_i2c, 0, object); + CHECK_ARGUMENT_TYPE_ON_CONDITION(HTS221_JS, init_i2c, 1, number, args_count == 3); + CHECK_ARGUMENT_TYPE_ON_CONDITION(HTS221_JS, init_i2c, 2, number, args_count == 3); + + // 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); + + // Unwrap arguments + void *i2c_ptr; + const jerry_object_native_info_t *i2c_type_ptr; + bool i2c_has_ptr = jerry_get_object_native_pointer(args[0], &i2c_ptr, &i2c_type_ptr); + + // Check if we have the i2c pointer + if (!i2c_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* i2c = reinterpret_cast<DevI2C*>(i2c_ptr); + + // call the respective function + if(args_count == 1){ + native_ptr->init(*i2c); + } + else if(args_count == 3){ + int address = jerry_get_number_value(args[1]); + int drdy_pin = jerry_get_number_value(args[2]); + native_ptr->init(*i2c, (uint8_t) address, (PinName) drdy_pin); + } + + return jerry_create_number(0); +} /** * HTS221_JS#get_temperature (native JavaScript method) - * - * @returns temperature + * @brief Gets the temperature reading + * @returns Temperature */ DECLARE_CLASS_FUNCTION(HTS221_JS, get_temperature) { CHECK_ARGUMENT_COUNT(HTS221_JS, get_temperature, (args_count == 0)); @@ -91,17 +194,54 @@ // Get the result from the C++ API float result = native_ptr->get_temperature(); - + //printf("temp hts221: %s\n", result); + // Cast it back to JavaScript and return return jerry_create_number(result); } +/** + * HTS221_JS#get_temperature_string (native JavaScript method) + * @brief Gets the temperature reading in string form + * @returns Temperature in string + */ +DECLARE_CLASS_FUNCTION(HTS221_JS, get_temperature_string) { + CHECK_ARGUMENT_COUNT(HTS221_JS, get_temperature_string, (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); + + char * result = new char[128]; + result = native_ptr->get_temperature_string(result); + + //pc.printf("Temperature: %s", result); + + // Cast it back to JavaScript + jerry_value_t out = jerry_create_string((unsigned char *)result); + + printf("temperature: %s\n", result); + + // Recycle the result from function + delete result; + + // Return the output + return out; + +} /** * HTS221_JS#get_humidity (native JavaScript method) - * - * @returns humidity + * @brief Get the humidity reading + * @returns Humidity */ DECLARE_CLASS_FUNCTION(HTS221_JS, get_humidity) { CHECK_ARGUMENT_COUNT(HTS221_JS, get_humidity, (args_count == 0)); @@ -121,15 +261,53 @@ // Get the result from the C++ API float result = native_ptr->get_humidity(); - + //printf("humidity hts221: %s\n", result); + // Cast it back to JavaScript and return return jerry_create_number(result); } /** + * HTS221_JS#get_humidity_string (native JavaScript method) + * @brief Get the humidity reading in string form + * @returns humidity in string + */ +DECLARE_CLASS_FUNCTION(HTS221_JS, get_humidity_string) { + CHECK_ARGUMENT_COUNT(HTS221_JS, get_humidity_string, (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); + + char * result = new char[128]; + result = native_ptr->get_humidity_string(result); + + // Cast it back to JavaScript + jerry_value_t out = jerry_create_string((unsigned char *)result); + + printf("humidity: %s\n", result); + + // Recycle the result from function + delete result; + + // Return the output + return out; +} + +/** * HTS221_JS#led_on (native JavaScript method) - * @param pin DigitalOut pin to blink + * @brief Sets the LED to 1, for testing purposes + * @param DigitalOut pin to blink */ DECLARE_CLASS_FUNCTION(HTS221_JS, led_on) { // Check that we have 1 argument, and that it's an object @@ -169,40 +347,30 @@ return jerry_create_undefined(); } + /** * HTS221_JS (native JavaScript constructor) - * - * @returns a JavaScript object representing HTS221_JS. + * @brief Constructor for Javascript wrapper + * @returns 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); - - // Check if we have the devI2c pointer - if (!devI2c_has_ptr) { - printf("Not a DevI2C 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); + CHECK_ARGUMENT_COUNT(HTS221_JS, __constructor, args_count == 0); + //pc.printf("constructor called!\n"); // Extract native HTS221_JS pointer (from this object) - HTS221_JS *native_ptr = new HTS221_JS(*devI2c); + HTS221_JS *native_ptr = new HTS221_JS(); 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, init_spi); + ATTACH_CLASS_FUNCTION(js_object, HTS221_JS, init_i2c); ATTACH_CLASS_FUNCTION(js_object, HTS221_JS, get_temperature); + ATTACH_CLASS_FUNCTION(js_object, HTS221_JS, get_temperature_string); ATTACH_CLASS_FUNCTION(js_object, HTS221_JS, get_humidity); + ATTACH_CLASS_FUNCTION(js_object, HTS221_JS, get_humidity_string); ATTACH_CLASS_FUNCTION(js_object, HTS221_JS, led_on); return js_object; -} \ No newline at end of file +}