main.cpp

00001 /**
00002  ******************************************************************************
00003  * @file    main.cpp
00004  * @author  CLab
00005  * @version V1.0.0
00006  * @date    2-December-2016
00007  * @brief   Simple Example application for using the X_NUCLEO_IKS01A2 
00008  *          MEMS Inertial & Environmental Sensor Nucleo expansion board.
00009  ******************************************************************************
00010  * @attention
00011  *
00012  * <h2><center>&copy; COPYRIGHT(c) 2016 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 "XNucleoIKS01A2.h"
00042 
00043 /* Instantiate the expansion board */
00044 static XNucleoIKS01A2 *mems_expansion_board = XNucleoIKS01A2::instance(D14, D15, D4, D5);
00045 
00046 /* Retrieve the composing elements of the expansion board */
00047 static LSM6DSLSensor *acc_gyro = mems_expansion_board->acc_gyro;
00048 
00049 InterruptIn mybutton(USER_BUTTON);
00050 DigitalOut myled(LED1);
00051 
00052 volatile int mems_event = 0;
00053 volatile int step_count_reset_request = 0;
00054 uint32_t previous_tick = 0;
00055 uint32_t current_tick = 0;
00056 uint16_t step_count = 0;
00057 
00058 /* User button callback. */
00059 void pressed_cb() {
00060   step_count_reset_request = 1;
00061 }
00062 
00063 /* Interrupt 1 callback. */
00064 void int1_cb() {
00065   mems_event = 1;
00066 }
00067 
00068 /* Simple main function */
00069 int main() {
00070   /* Attach callback to User button press */
00071   mybutton.fall(&pressed_cb);
00072   /* Attach callback to LSM6DSL INT1 */
00073   acc_gyro->attach_int1_irq(&int1_cb);
00074   
00075   /* Enable LSM6DSL accelerometer */
00076   acc_gyro->enable_x();
00077   /* Enable Pedometer. */
00078   acc_gyro->enable_pedometer();
00079   
00080   previous_tick = clock();
00081   
00082   printf("\r\n--- Starting new run ---\r\n");
00083  
00084   while(1) {
00085     if (mems_event) {
00086       mems_event = 0;
00087       LSM6DSL_Event_Status_t status;
00088       acc_gyro->get_event_status(&status);
00089       if (status.StepStatus) {
00090         /* New step detected, so print the step counter */
00091         acc_gyro->get_step_counter(&step_count);
00092         printf("Step counter: %d\r\n", step_count);
00093       
00094         /* Led blinking. */
00095         myled = 1;
00096         wait(0.1);
00097         myled = 0;
00098       }
00099     }
00100 
00101     if(step_count_reset_request) {
00102       step_count_reset_request = 0;
00103       acc_gyro->reset_step_counter();
00104     }
00105 
00106     /* Print the step counter in any case every 3s */
00107     current_tick = clock();
00108     if(((current_tick - previous_tick)/CLOCKS_PER_SEC) >= 3) {
00109       acc_gyro->get_step_counter(&step_count);
00110       printf("Step counter: %d\r\n", step_count);
00111       previous_tick = clock();
00112     }
00113   }
00114 }