Example of wake up detection for LSM6DSL in X-NUCLEO-IKS01A2
Dependencies: X_NUCLEO_IKS01A2 mbed
Fork of WakeUp_IKS01A2 by
Wake up Demo Application based on sensor expansion board X-NUCLEO-IKS01A2
Main function is to show how to detect the wake up event using the sensor expansion board and send a notification using UART to a connected PC or Desktop and display it on terminal applications like TeraTerm.
After connection has been established:
- the user can try to shake the board and then view the notification using an hyper terminal. When the wake up event is detected, the LED is switched on for a while.
- the user button can be used to enable/disable the wake up detection feature.
Diff: main.cpp
- Revision:
- 0:e7e920b85676
- Child:
- 4:fbffbdc722a5
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Fri Aug 12 13:43:40 2016 +0000 @@ -0,0 +1,109 @@ +/** + ****************************************************************************** + * @file main.cpp + * @author AST / EST + * @version V0.0.1 + * @date 9-August-2016 + * @brief Simple Example application for using the X_NUCLEO_IKS01A2 + * MEMS Inertial & Environmental Sensor Nucleo expansion board. + ****************************************************************************** + * @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 "mbed.h" +#include "x_nucleo_iks01a2.h" + +/* Instantiate the expansion board */ +static X_NUCLEO_IKS01A2 *mems_expansion_board = X_NUCLEO_IKS01A2::Instance(D14, D15); + +/* Retrieve the composing elements of the expansion board */ +static LSM6DSLSensor *acc_gyro = mems_expansion_board->acc_gyro; + +InterruptIn lsm6dsl_int1(IKS01A2_PIN_LSM6DSL_INT1); +InterruptIn mybutton(USER_BUTTON); +DigitalOut myled(LED1); + +volatile int wake_up = 0; +volatile int toggle_wake_up_enable = 0; +static int wake_up_is_enabled = 1; + +void pressed(); +void wakeup(); + +/* Simple main function */ +int main() { + /* Attach callback to User button press */ + mybutton.fall(&pressed); + /* Attach callback to LSM6DSL INT1 */ + lsm6dsl_int1.rise(&wakeup); + + /* Enable LSM6DSL accelerometer */ + acc_gyro->Enable_X(); + /* Enable Wake-Up Detection. */ + acc_gyro->Enable_Wake_Up_Detection(); + + printf("\r\n--- Starting new run ---\r\n"); + + while(1) { + if(toggle_wake_up_enable) { + toggle_wake_up_enable = 0; + if(wake_up_is_enabled == 0) { + acc_gyro->Enable_Wake_Up_Detection(); + wake_up_is_enabled = 1; + } else { + acc_gyro->Disable_Wake_Up_Detection(); + wake_up_is_enabled = 0; + } + } + + if (wake_up) { + wake_up = 0; + uint8_t status = 0; + acc_gyro->Get_Status_Wake_Up_Detection(&status); + if (status) { + /* Led blinking. */ + myled = 1; + wait(0.2); + myled = 0; + + /* Output data. */ + printf("Wake Up Detected!\r\n"); + } + } + } +} + +void pressed() { + toggle_wake_up_enable = 1; +} + +void wakeup() { + wake_up = 1; +}