main.cpp

00001 /**
00002  ******************************************************************************
00003  * @file    main.cpp
00004  * @author  SRA
00005  * @version V1.0.0
00006  * @date    5-March-2019
00007  * @brief   Simple Example application for using the X_NUCLEO_IKS01A3
00008  *          MEMS Inertial & Environmental Sensor Nucleo expansion board.
00009  ******************************************************************************
00010  * @attention
00011  *
00012  * <h2><center>&copy; COPYRIGHT(c) 2019 STMicroelectronics</center></h2>
00013  *
00014  * Redistribution and use in source and binary forms, with or without modification,
00015  * are permitted provided that the following conditions are met:
00016  *   1. Redistributions of source code must retain the above copyright notice,
00017  *      this list of conditions and the following disclaimer.
00018  *   2. Redistributions in binary form must reproduce the above copyright notice,
00019  *      this list of conditions and the following disclaimer in the documentation
00020  *      and/or other materials provided with the distribution.
00021  *   3. Neither the name of STMicroelectronics nor the names of its contributors
00022  *      may be used to endorse or promote products derived from this software
00023  *      without specific prior written permission.
00024  *
00025  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00026  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00027  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00028  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
00029  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00030  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00031  *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00032  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00033  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00034  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00035  *
00036  ******************************************************************************
00037 */
00038 
00039 /* Includes */
00040 #include "mbed.h"
00041 #include "rtos.h"
00042 #include "XNucleoIKS01A3.h"
00043 
00044 /* Instantiate the expansion board */
00045 static XNucleoIKS01A3 *mems_expansion_board = XNucleoIKS01A3::instance(D14, D15, D4, D5, A3, D6, A4);
00046 
00047 /* Retrieve the composing elements of the expansion board */
00048 static LSM6DSOSensor *acc_gyro = mems_expansion_board->acc_gyro;
00049 
00050 InterruptIn mybutton(BUTTON1);
00051 DigitalOut myled(LED1);
00052 
00053 volatile int mems_event = 0;
00054 volatile int step_count_reset_request = 0;
00055 uint32_t previous_tick = 0;
00056 uint32_t current_tick = 0;
00057 uint16_t step_count = 0;
00058 
00059 /* User button callback. */
00060 void pressed_cb()
00061 {
00062     step_count_reset_request = 1;
00063 }
00064 
00065 /* Interrupt 1 callback. */
00066 void int1_cb()
00067 {
00068     mems_event = 1;
00069 }
00070 
00071 /* Simple main function */
00072 int main()
00073 {
00074     /* Attach callback to User button press */
00075     mybutton.fall(&pressed_cb);
00076     /* Attach callback to LSM6DSO INT1 */
00077     acc_gyro->attach_int1_irq(&int1_cb);
00078 
00079     /* Enable LSM6DSO accelerometer */
00080     acc_gyro->enable_x();
00081     /* Enable Pedometer. */
00082     acc_gyro->enable_pedometer();
00083 
00084     previous_tick = clock();
00085 
00086     printf("\r\n--- Starting new run ---\r\n");
00087 
00088     while (1) {
00089         if (mems_event) {
00090             mems_event = 0;
00091             LSM6DSO_Event_Status_t status;
00092             acc_gyro->get_event_status(&status);
00093             if (status.StepStatus) {
00094                 /* New step detected, so print the step counter */
00095                 acc_gyro->get_step_counter(&step_count);
00096                 printf("Step counter: %d\r\n", step_count);
00097 
00098                 /* Led blinking. */
00099                 myled = 1;
00100                 ThisThread::sleep_for(100);
00101                 myled = 0;
00102             }
00103         }
00104 
00105         if (step_count_reset_request) {
00106             step_count_reset_request = 0;
00107             acc_gyro->reset_step_counter();
00108         }
00109 
00110         /* Print the step counter in any case every 3s */
00111         current_tick = clock();
00112         if (((current_tick - previous_tick) / CLOCKS_PER_SEC) >= 3) {
00113             acc_gyro->get_step_counter(&step_count);
00114             printf("Step counter: %d\r\n", step_count);
00115             previous_tick = clock();
00116         }
00117     }
00118 }