Javascript wrappers for LSM303AGR Sensor library
Dependencies: LSM303AGR
LSM303AGR_JS.cpp
- Committer:
- akhtar.syedzeeshan@gmail.com
- Date:
- 2017-10-25
- Revision:
- 2:ddbdfca82832
- Parent:
- 1:78c55e099d6c
- Child:
- 3:d076984ee23b
File content as of revision 2:ddbdfca82832:
/** ****************************************************************************** * @file LSM303AGR_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 "LSM303AGR_JS.h" #include <stdlib.h> /* atoi */ #include "mbed.h" /* Helper function for printing floats & doubles */ static char *print_double(char* str, double v, int decimalDigits=2) { int i = 1; int intPart, fractPart; int len; char *ptr; /* prepare decimal digits multiplicator */ for (;decimalDigits!=0; i*=10, decimalDigits--); /* calculate integer & fractinal parts */ intPart = (int)v; fractPart = (int)((v-(double)(int)v)*i); /* fill in integer part */ sprintf(str, "%i.", intPart); /* prepare fill in of fractional part */ len = strlen(str); ptr = &str[len]; /* fill in leading fractional zeros */ for (i/=10;i>1; i/=10, ptr++) { if (fractPart >= i) { break; } *ptr = '0'; } /* fill in (rest of) fractional part */ sprintf(ptr, "%i", fractPart); return str; } /* Helper function for creating JSON for data */ char *LSM303AGR_JS::make_json(char* str, int32_t *data, char *axes, int data_count) { char *ptr; ptr = str; str[0] = 0; for(int i = 0; i < data_count; i++){ //printf("len: %i\n", strlen(str)); if(i == 0){ sprintf(ptr, "{"); ptr = &str[strlen(str)]; } else{ sprintf(ptr, ","); ptr = &str[strlen(str)]; } sprintf(ptr, "\"%c\":%i", axes[i], data[i]); ptr = &str[strlen(str)]; } sprintf(ptr, "}"); return str; } /* Class Implementation ------------------------------------------------------*/ /** Constructor * @brief Initiaze the component. * @param devI2c object of an helper class which handles the DevI2C peripheral */ LSM303AGR_JS::LSM303AGR_JS(DevI2C &devI2c){ magnetometer = new LSM303AGRMagSensor (&devI2c); accelerometer = new LSM303AGRAccSensor (&devI2c); magnetometer->init(NULL); accelerometer->init(NULL); magnetometer->enable(); accelerometer->enable(); } /** Destructor * @brief Recycle the component. * Deletes the Sensor Object */ LSM303AGR_JS::~LSM303AGR_JS(){ if(magnetometer != NULL){ delete magnetometer; } if(accelerometer != NULL){ delete accelerometer; } } /** * @brief Read ID address of LSM303AGR Magnetometer * @retval The ID of the Sensor */ uint8_t LSM303AGR_JS::readMagnetometerID(){ uint8_t result; magnetometer->read_id(&result); return result; } /** * @brief Read ID address of LSM303AGR Accelerometer * @retval The ID of the Sensor */ uint8_t LSM303AGR_JS::readAccelerometerID(){ uint8_t result; accelerometer->read_id(&result); return result; } /** * @brief Get the accleremeter reading from LSM303AGR * @retval Accleremeter value */ int32_t *LSM303AGR_JS::get_accelerometer_axes(int32_t *axes){ accelerometer->get_x_axes(axes); printf("LSM303AGR [acc/mg]: %6ld, %6ld, %6ld\r\n", axes[0], axes[1], axes[2]); return axes; } /** * @brief Get the accleremeter reading from LSM303AGR * @retval Accleremeter value in JSON string form */ char *LSM303AGR_JS::get_accelerometer_axes_json(char *data){ int32_t axes[3]; accelerometer->get_x_axes(axes); //printf("LSM303AGR [acc/mg]: %6ld, %6ld, %6ld\r\n", axes[0], axes[1], axes[2]); char axes_labels[3] = {'x', 'y', 'z'}; make_json(data, axes, axes_labels, 3); return data; } /** * @brief Get the Magnetometer reading from LSM303AGR * @retval Magnetometer value */ int32_t *LSM303AGR_JS::get_magnetometer_axes(int32_t *axes){ magnetometer->get_m_axes(axes); printf("LSM303AGR [mag/mgauss]: %6ld, %6ld, %6ld\r\n", axes[0], axes[1], axes[2]); return axes; } /** * @brief Get the Magnetometer reading from LSM303AGR * @retval Magnetometer value */ char *LSM303AGR_JS::get_magnetometer_axes_json(char * data){ int32_t axes[3]; magnetometer->get_m_axes(axes); //printf("LSM303AGR [mag/mgauss]: %6ld, %6ld, %6ld\r\n", axes[0], axes[1], axes[2]); char axes_labels[3] = {'x', 'y', 'z'}; make_json(data, axes, axes_labels, 3); return data; }