mirror of
https://github.com/jerryscript-project/jerryscript.git
synced 2025-12-15 16:29:21 +00:00
0511091e8a
Since the project is now hosted at the JS Foundation we can move to unified copyright notices for the project. Starting with this commit all future contributions to the project should only carry the following copyright notice (except for third-party code which requires copyright information to be preserved): "Copyright JS Foundation and other contributors, http://js.foundation" (without the quotes) This avoids cluttering the codebase with contributor-specific copyright notices which have a higher maintenance overhead and tend to get outdated quickly. Also dropping the year from the copyright notices helps to avoid yearly code changes just to update the copyright notices. Note that each contributor still retains full copyright ownership of his/her contributions and the respective authorship is tracked very accurately via Git. JerryScript-DCO-1.0-Signed-off-by: Tilmann Scheller t.scheller@samsung.com
271 lines
8.2 KiB
C++
271 lines
8.2 KiB
C++
/* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "jerryscript-mbed-util/logging.h"
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#include "jerryscript-mbed-drivers/I2C-js.h"
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#include "jerryscript-mbed-library-registry/wrap_tools.h"
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#include "mbed.h"
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/**
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* I2C#frequency (native JavaScript method)
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*
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* Set the frequency of the I2C bus.
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*
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* @param frequency New I2C Frequency
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*/
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DECLARE_CLASS_FUNCTION(I2C, frequency) {
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CHECK_ARGUMENT_COUNT(I2C, frequency, (args_count == 1));
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CHECK_ARGUMENT_TYPE_ALWAYS(I2C, frequency, 0, number);
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// Unwrap native I2C object
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uintptr_t native_handle;
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jerry_get_object_native_handle(this_obj, &native_handle);
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I2C* native_ptr = reinterpret_cast<I2C*>(native_handle);
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int hz = jerry_get_number_value(args[0]);
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native_ptr->frequency(hz);
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return jerry_create_undefined();
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}
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/**
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* I2C#read (native JavaScript method)
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*
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* Read data from the I2C bus.
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*
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* @overload I2C#read(int)
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* Read a single byte from the I2C bus
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*
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* @param ack indicates if the byte is to be acknowledged (1 => acknowledge)
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*
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* @returns array: Data read from the I2C bus
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*
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* @overload I2C#read(int, array, int)
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* Read a series of bytes from the I2C bus
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*
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* @param address I2C address to read from
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* @param data Array to read into
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* @param length Length of data to read
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*
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* @returns array: Data read from the I2C bus
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*/
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DECLARE_CLASS_FUNCTION(I2C, read) {
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CHECK_ARGUMENT_COUNT(I2C, read, (args_count == 1 || args_count == 3 || args_count == 4));
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if (args_count == 1) {
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CHECK_ARGUMENT_TYPE_ALWAYS(I2C, read, 0, number);
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uintptr_t native_handle;
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jerry_get_object_native_handle(this_obj, &native_handle);
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I2C *native_ptr = reinterpret_cast<I2C*>(native_handle);
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int data = jerry_get_number_value(args[0]);
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int result = native_ptr->read(data);
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return jerry_create_number(result);
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} else {
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CHECK_ARGUMENT_TYPE_ALWAYS(I2C, read, 0, number);
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CHECK_ARGUMENT_TYPE_ALWAYS(I2C, read, 1, array);
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CHECK_ARGUMENT_TYPE_ALWAYS(I2C, read, 2, number);
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CHECK_ARGUMENT_TYPE_ON_CONDITION(I2C, read, 3, boolean, (args_count == 4));
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uintptr_t native_handle;
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jerry_get_object_native_handle(this_obj, &native_handle);
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I2C *native_ptr = reinterpret_cast<I2C*>(native_handle);
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const uint32_t data_len = jerry_get_array_length(args[1]);
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int address = jerry_get_number_value(args[0]);
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int length = jerry_get_number_value(args[2]);
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char *data = new char[data_len];
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bool repeated = false;
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if (args_count == 4) {
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repeated = jerry_get_boolean_value(args[3]);
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}
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int result = native_ptr->read(address, data, length, repeated);
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jerry_value_t out_array = jerry_create_array(data_len);
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for (uint32_t i = 0; i < data_len; i++) {
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jerry_value_t val = jerry_create_number(double(data[i]));
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jerry_set_property_by_index(out_array, i, val);
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jerry_release_value(val);
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}
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delete[] data;
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if (result == 0) {
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// ACK
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return out_array;
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} else {
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// NACK
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const char *error_msg = "NACK received from I2C bus";
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jerry_release_value(out_array);
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return jerry_create_error(JERRY_ERROR_COMMON, reinterpret_cast<const jerry_char_t *>(error_msg));
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}
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}
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}
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/**
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* I2C#write (native JavaScript method)
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*
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* @overload I2C#write(int)
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* Write a single byte to the I2C bus
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*
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* @param data Data byte to write to the I2C bus
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*
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* @returns 1 on success, 0 on failure
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*
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* @overload I2C#write(int, array, int, bool)
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* Write an array of data to a certain address on the I2C bus
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*
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* @param address 8-bit I2C slave address
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* @param data Array of bytes to send
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* @param length Length of data to write
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* @param repeated (optional) If true, do not send stop at end.
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*
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* @returns 0 on success, non-0 on failure
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*/
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DECLARE_CLASS_FUNCTION(I2C, write) {
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CHECK_ARGUMENT_COUNT(I2C, write, (args_count == 1 || args_count == 3 || args_count == 4));
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if (args_count == 1) {
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CHECK_ARGUMENT_TYPE_ALWAYS(I2C, write, 0, number);
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// Extract native I2C object
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uintptr_t native_handle;
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jerry_get_object_native_handle(this_obj, &native_handle);
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I2C *native_ptr = reinterpret_cast<I2C*>(native_handle);
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// Unwrap arguments
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int data = jerry_get_number_value(args[0]);
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int result = native_ptr->write(data);
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return jerry_create_number(result);
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} else {
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// 3 or 4
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CHECK_ARGUMENT_TYPE_ALWAYS(I2C, write, 0, number);
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CHECK_ARGUMENT_TYPE_ALWAYS(I2C, write, 1, array);
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CHECK_ARGUMENT_TYPE_ALWAYS(I2C, write, 2, number);
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CHECK_ARGUMENT_TYPE_ON_CONDITION(I2C, write, 3, boolean, (args_count == 4));
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// Extract native I2C object
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uintptr_t native_handle;
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jerry_get_object_native_handle(this_obj, &native_handle);
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I2C *native_ptr = reinterpret_cast<I2C*>(native_handle);
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// Unwrap arguments
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int address = jerry_get_number_value(args[0]);
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const uint32_t data_len = jerry_get_array_length(args[1]);
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int length = jerry_get_number_value(args[2]);
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bool repeated = args_count == 4 && jerry_get_boolean_value(args[3]);
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// Construct data byte array
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char *data = new char[data_len];
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for (uint32_t i = 0; i < data_len; i++) {
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data[i] = jerry_get_number_value(jerry_get_property_by_index(args[1], i));
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}
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int result = native_ptr->write(address, data, length, repeated);
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// free dynamically allocated resources
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delete[] data;
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return jerry_create_number(result);
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}
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}
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/**
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* I2C#start (native JavaScript method)
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*
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* Creates a start condition on the I2C bus.
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*/
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DECLARE_CLASS_FUNCTION(I2C, start)
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{
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CHECK_ARGUMENT_COUNT(I2C, start, (args_count == 0));
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// Extract native I2C object
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uintptr_t native_handle;
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jerry_get_object_native_handle(this_obj, &native_handle);
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I2C *native_ptr = reinterpret_cast<I2C*>(native_handle);
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native_ptr->start();
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return jerry_create_undefined();
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}
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/**
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* I2C#stop (native JavaScript method)
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*
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* Creates a stop condition on the I2C bus.
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*/
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DECLARE_CLASS_FUNCTION(I2C, stop)
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{
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CHECK_ARGUMENT_COUNT(I2C, stop, (args_count == 0));
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// Extract native I2C object
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uintptr_t native_handle;
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jerry_get_object_native_handle(this_obj, &native_handle);
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I2C *native_ptr = reinterpret_cast<I2C*>(native_handle);
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native_ptr->stop();
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return jerry_create_undefined();
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}
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/**
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* I2C#destructor
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*
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* Called if/when the I2C object is GC'ed.
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*/
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void NAME_FOR_CLASS_NATIVE_DESTRUCTOR(I2C) (uintptr_t handle) {
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delete reinterpret_cast<I2C*>(handle);
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}
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/**
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* I2C (native JavaScript constructor)
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*
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* @param sda mbed pin for I2C data
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* @param scl mbed pin for I2C clock
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* @returns a JavaScript object representing the I2C bus.
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*/
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DECLARE_CLASS_CONSTRUCTOR(I2C) {
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CHECK_ARGUMENT_COUNT(I2C, __constructor, (args_count == 2));
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CHECK_ARGUMENT_TYPE_ALWAYS(I2C, __constructor, 0, number);
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CHECK_ARGUMENT_TYPE_ALWAYS(I2C, __constructor, 1, number);
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int sda = jerry_get_number_value(args[0]);
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int scl = jerry_get_number_value(args[1]);
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uintptr_t native_handle = (uintptr_t)new I2C((PinName)sda, (PinName)scl);
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jerry_value_t js_object = jerry_create_object();
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jerry_set_object_native_handle(js_object, native_handle, NAME_FOR_CLASS_NATIVE_DESTRUCTOR(I2C));
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ATTACH_CLASS_FUNCTION(js_object, I2C, frequency);
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ATTACH_CLASS_FUNCTION(js_object, I2C, read);
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ATTACH_CLASS_FUNCTION(js_object, I2C, write);
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ATTACH_CLASS_FUNCTION(js_object, I2C, start);
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ATTACH_CLASS_FUNCTION(js_object, I2C, stop);
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return js_object;
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}
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