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Example of wake up detection for LIS2DW12 in X-NUCLEO-IKS01A3
Dependencies: X_NUCLEO_IKS01A3
Wake up Demo Application with LIS2DW12 based on sensor expansion board X-NUCLEO-IKS01A3
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:
- 0:276fc25c1c41
- Child:
- 5:69cd10d5ca51
diff -r 000000000000 -r 276fc25c1c41 main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Wed Mar 06 13:39:11 2019 +0000 @@ -0,0 +1,108 @@ +/** + ****************************************************************************** + * @file main.cpp + * @author SRA + * @version V1.0.0 + * @date 5-March-2019 + * @brief Simple Example application for using the X_NUCLEO_IKS01A3 + * MEMS Inertial & Environmental Sensor Nucleo expansion board. + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT(c) 2019 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 "XNucleoIKS01A3.h" + +/* Instantiate the expansion board */ +static XNucleoIKS01A3 *mems_expansion_board = XNucleoIKS01A3::instance(D14, D15, D4, D5, A3, D6, A4); + +/* Retrieve the composing elements of the expansion board */ +static LIS2DW12Sensor *accelerometer = mems_expansion_board->accelerometer; + +InterruptIn mybutton(USER_BUTTON); +DigitalOut myled(LED1); + +volatile int mems_event = 0; +volatile int toggle_wake_up_enable = 0; +static int wake_up_is_enabled = 1; + +void pressed_cb(); +void INT1_cb(); + +/* Simple main function */ +int main() { + /* Attach callback to User button press */ + mybutton.fall(&pressed_cb); + /* Attach callback to LIS2DW12 INT1 */ + accelerometer->attach_int1_irq(&INT1_cb); + + /* Enable LIS2DW12 accelerometer */ + accelerometer->enable_x(); + /* Enable Wake-Up Detection. */ + accelerometer->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) { + accelerometer->enable_wake_up_detection(); + wake_up_is_enabled = 1; + } else { + accelerometer->disable_wake_up_detection(); + wake_up_is_enabled = 0; + } + } + + if (mems_event) { + mems_event = 0; + LIS2DW12_Event_Status_t status; + accelerometer->get_event_status(&status); + if (status.WakeUpStatus) { + /* Led blinking. */ + myled = 1; + wait(0.2); + myled = 0; + + /* Output data. */ + printf("Wake Up Detected!\r\n"); + } + } + } +} + +void pressed_cb() { + toggle_wake_up_enable = 1; +} + +void INT1_cb() { + mems_event = 1; +}