![](/media/cache/group/ST_logo_2020_blue_V_cmyk.jpg.50x50_q85.jpg)
Example of temperature limit detection for STTS751 in X-NUCLEO-IKS01A3
Dependencies: X_NUCLEO_IKS01A3
Temperature Limit Demo Application with STTS751 based on sensor expansion board X-NUCLEO-IKS01A3
Main function is to show how to detect exceeding of temperature limits 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 heat up or cool down the board and view the data using an hyper terminal.
main.cpp@3:3c8bce3cdf2f, 2019-05-24 (annotated)
- Committer:
- cparata
- Date:
- Fri May 24 14:41:02 2019 +0000
- Revision:
- 3:3c8bce3cdf2f
- Parent:
- 0:1399adb8f248
- Child:
- 5:b747a8948606
Update mbed library to support mbed-os
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
cparata | 0:1399adb8f248 | 1 | /** |
cparata | 0:1399adb8f248 | 2 | ****************************************************************************** |
cparata | 0:1399adb8f248 | 3 | * @file main.cpp |
cparata | 0:1399adb8f248 | 4 | * @author SRA |
cparata | 0:1399adb8f248 | 5 | * @version V1.0.0 |
cparata | 0:1399adb8f248 | 6 | * @date 5-March-2019 |
cparata | 0:1399adb8f248 | 7 | * @brief Simple Example application for using the X_NUCLEO_IKS01A3 |
cparata | 0:1399adb8f248 | 8 | * MEMS Inertial & Environmental Sensor Nucleo expansion board. |
cparata | 0:1399adb8f248 | 9 | ****************************************************************************** |
cparata | 0:1399adb8f248 | 10 | * @attention |
cparata | 0:1399adb8f248 | 11 | * |
cparata | 0:1399adb8f248 | 12 | * <h2><center>© COPYRIGHT(c) 2019 STMicroelectronics</center></h2> |
cparata | 0:1399adb8f248 | 13 | * |
cparata | 0:1399adb8f248 | 14 | * Redistribution and use in source and binary forms, with or without modification, |
cparata | 0:1399adb8f248 | 15 | * are permitted provided that the following conditions are met: |
cparata | 0:1399adb8f248 | 16 | * 1. Redistributions of source code must retain the above copyright notice, |
cparata | 0:1399adb8f248 | 17 | * this list of conditions and the following disclaimer. |
cparata | 0:1399adb8f248 | 18 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
cparata | 0:1399adb8f248 | 19 | * this list of conditions and the following disclaimer in the documentation |
cparata | 0:1399adb8f248 | 20 | * and/or other materials provided with the distribution. |
cparata | 0:1399adb8f248 | 21 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
cparata | 0:1399adb8f248 | 22 | * may be used to endorse or promote products derived from this software |
cparata | 0:1399adb8f248 | 23 | * without specific prior written permission. |
cparata | 0:1399adb8f248 | 24 | * |
cparata | 0:1399adb8f248 | 25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
cparata | 0:1399adb8f248 | 26 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
cparata | 0:1399adb8f248 | 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
cparata | 0:1399adb8f248 | 28 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
cparata | 0:1399adb8f248 | 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
cparata | 0:1399adb8f248 | 30 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
cparata | 0:1399adb8f248 | 31 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
cparata | 0:1399adb8f248 | 32 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
cparata | 0:1399adb8f248 | 33 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
cparata | 0:1399adb8f248 | 34 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
cparata | 0:1399adb8f248 | 35 | * |
cparata | 0:1399adb8f248 | 36 | ****************************************************************************** |
cparata | 0:1399adb8f248 | 37 | */ |
cparata | 0:1399adb8f248 | 38 | |
cparata | 0:1399adb8f248 | 39 | /* Includes */ |
cparata | 0:1399adb8f248 | 40 | #include "mbed.h" |
cparata | 0:1399adb8f248 | 41 | #include "XNucleoIKS01A3.h" |
cparata | 0:1399adb8f248 | 42 | |
cparata | 0:1399adb8f248 | 43 | /* Instantiate the expansion board */ |
cparata | 0:1399adb8f248 | 44 | static XNucleoIKS01A3 *mems_expansion_board = XNucleoIKS01A3::instance(D14, D15, D4, D5, A3, D6, A4); |
cparata | 0:1399adb8f248 | 45 | |
cparata | 0:1399adb8f248 | 46 | /* Retrieve the composing elements of the expansion board */ |
cparata | 0:1399adb8f248 | 47 | static STTS751Sensor *t_sensor = mems_expansion_board->t_sensor; |
cparata | 0:1399adb8f248 | 48 | |
cparata | 0:1399adb8f248 | 49 | DigitalOut myled(LED1); |
cparata | 0:1399adb8f248 | 50 | |
cparata | 0:1399adb8f248 | 51 | volatile int mems_event = 0; |
cparata | 0:1399adb8f248 | 52 | uint32_t previous_tick = 0; |
cparata | 0:1399adb8f248 | 53 | uint32_t current_tick = 0; |
cparata | 0:1399adb8f248 | 54 | uint8_t high = 0, low = 0; |
cparata | 0:1399adb8f248 | 55 | float temperature = 0.0f; |
cparata | 0:1399adb8f248 | 56 | char buffer[32]; |
cparata | 0:1399adb8f248 | 57 | |
cparata | 0:1399adb8f248 | 58 | void INT_cb(); |
cparata | 0:1399adb8f248 | 59 | |
cparata | 0:1399adb8f248 | 60 | /* Helper function for printing floats & doubles */ |
cparata | 0:1399adb8f248 | 61 | static char *print_double(char* str, double v, int decimalDigits=2) |
cparata | 0:1399adb8f248 | 62 | { |
cparata | 0:1399adb8f248 | 63 | int i = 1; |
cparata | 0:1399adb8f248 | 64 | int intPart, fractPart; |
cparata | 0:1399adb8f248 | 65 | int len; |
cparata | 0:1399adb8f248 | 66 | char *ptr; |
cparata | 0:1399adb8f248 | 67 | |
cparata | 0:1399adb8f248 | 68 | /* prepare decimal digits multiplicator */ |
cparata | 0:1399adb8f248 | 69 | for (;decimalDigits!=0; i*=10, decimalDigits--); |
cparata | 0:1399adb8f248 | 70 | |
cparata | 0:1399adb8f248 | 71 | /* calculate integer & fractinal parts */ |
cparata | 0:1399adb8f248 | 72 | intPart = (int)v; |
cparata | 0:1399adb8f248 | 73 | fractPart = (int)((v-(double)(int)v)*i); |
cparata | 0:1399adb8f248 | 74 | |
cparata | 0:1399adb8f248 | 75 | /* fill in integer part */ |
cparata | 0:1399adb8f248 | 76 | sprintf(str, "%i.", intPart); |
cparata | 0:1399adb8f248 | 77 | |
cparata | 0:1399adb8f248 | 78 | /* prepare fill in of fractional part */ |
cparata | 0:1399adb8f248 | 79 | len = strlen(str); |
cparata | 0:1399adb8f248 | 80 | ptr = &str[len]; |
cparata | 0:1399adb8f248 | 81 | |
cparata | 0:1399adb8f248 | 82 | /* fill in leading fractional zeros */ |
cparata | 0:1399adb8f248 | 83 | for (i/=10;i>1; i/=10, ptr++) { |
cparata | 0:1399adb8f248 | 84 | if (fractPart >= i) { |
cparata | 0:1399adb8f248 | 85 | break; |
cparata | 0:1399adb8f248 | 86 | } |
cparata | 0:1399adb8f248 | 87 | *ptr = '0'; |
cparata | 0:1399adb8f248 | 88 | } |
cparata | 0:1399adb8f248 | 89 | |
cparata | 0:1399adb8f248 | 90 | /* fill in (rest of) fractional part */ |
cparata | 0:1399adb8f248 | 91 | sprintf(ptr, "%i", fractPart); |
cparata | 0:1399adb8f248 | 92 | |
cparata | 0:1399adb8f248 | 93 | return str; |
cparata | 0:1399adb8f248 | 94 | } |
cparata | 0:1399adb8f248 | 95 | |
cparata | 0:1399adb8f248 | 96 | /* Simple main function */ |
cparata | 0:1399adb8f248 | 97 | int main() { |
cparata | 0:1399adb8f248 | 98 | /* Attach callback to STTS751 INT */ |
cparata | 0:1399adb8f248 | 99 | t_sensor->attach_int_irq(&INT_cb); |
cparata | 0:1399adb8f248 | 100 | |
cparata | 3:3c8bce3cdf2f | 101 | /* Enable STTS751 temperature sensor */ |
cparata | 0:1399adb8f248 | 102 | t_sensor->enable(); |
cparata | 0:1399adb8f248 | 103 | /* Set ODR to 4Hz */ |
cparata | 0:1399adb8f248 | 104 | t_sensor->set_odr(4.0f); |
cparata | 0:1399adb8f248 | 105 | /* Set Low Temperature Threshold */ |
cparata | 0:1399adb8f248 | 106 | t_sensor->set_low_temp_thr(22.0f); |
cparata | 0:1399adb8f248 | 107 | /* Set High Temperature Threshold */ |
cparata | 0:1399adb8f248 | 108 | t_sensor->set_high_temp_thr(28.0f); |
cparata | 0:1399adb8f248 | 109 | /* Enable Event pin */ |
cparata | 0:1399adb8f248 | 110 | t_sensor->set_event_pin(1); |
cparata | 0:1399adb8f248 | 111 | /* Get beginning status */ |
cparata | 0:1399adb8f248 | 112 | t_sensor->get_temp_limit_status(NULL, NULL, NULL); |
cparata | 0:1399adb8f248 | 113 | |
cparata | 0:1399adb8f248 | 114 | previous_tick = clock(); |
cparata | 0:1399adb8f248 | 115 | |
cparata | 0:1399adb8f248 | 116 | printf("\r\n--- Starting new run ---\r\n"); |
cparata | 0:1399adb8f248 | 117 | |
cparata | 0:1399adb8f248 | 118 | while(1) { |
cparata | 0:1399adb8f248 | 119 | if (mems_event) { |
cparata | 0:1399adb8f248 | 120 | mems_event=0; |
cparata | 0:1399adb8f248 | 121 | uint8_t high_temp = 0, low_temp = 0; |
cparata | 0:1399adb8f248 | 122 | t_sensor->get_temp_limit_status(&high_temp, &low_temp, NULL); |
cparata | 0:1399adb8f248 | 123 | if (high_temp){ |
cparata | 0:1399adb8f248 | 124 | high = 1; |
cparata | 0:1399adb8f248 | 125 | low = 0; |
cparata | 0:1399adb8f248 | 126 | } |
cparata | 0:1399adb8f248 | 127 | if (low_temp){ |
cparata | 0:1399adb8f248 | 128 | low = 1; |
cparata | 0:1399adb8f248 | 129 | high = 0; |
cparata | 0:1399adb8f248 | 130 | } |
cparata | 0:1399adb8f248 | 131 | |
cparata | 0:1399adb8f248 | 132 | t_sensor->get_temperature(&temperature); |
cparata | 0:1399adb8f248 | 133 | myled = 1; |
cparata | 0:1399adb8f248 | 134 | wait(0.1); |
cparata | 0:1399adb8f248 | 135 | myled = 0; |
cparata | 0:1399adb8f248 | 136 | } |
cparata | 0:1399adb8f248 | 137 | |
cparata | 0:1399adb8f248 | 138 | current_tick = clock(); |
cparata | 0:1399adb8f248 | 139 | if (((current_tick - previous_tick)/CLOCKS_PER_SEC) >= 2){ |
cparata | 0:1399adb8f248 | 140 | if (!high && !low){ |
cparata | 0:1399adb8f248 | 141 | t_sensor->get_temperature(&temperature); |
cparata | 0:1399adb8f248 | 142 | } |
cparata | 0:1399adb8f248 | 143 | printf("Temp[C]: "); |
cparata | 0:1399adb8f248 | 144 | printf("%7s C", print_double(buffer, temperature)); |
cparata | 0:1399adb8f248 | 145 | if (high){ |
cparata | 0:1399adb8f248 | 146 | printf(" High temperature detected!(>28C) \r\n"); |
cparata | 0:1399adb8f248 | 147 | high = 0; |
cparata | 0:1399adb8f248 | 148 | } else if (low) { |
cparata | 0:1399adb8f248 | 149 | printf(" Low temperature detected!(<22C) \r\n"); |
cparata | 0:1399adb8f248 | 150 | low = 0; |
cparata | 0:1399adb8f248 | 151 | } else { |
cparata | 0:1399adb8f248 | 152 | printf("\r\n"); |
cparata | 0:1399adb8f248 | 153 | } |
cparata | 0:1399adb8f248 | 154 | previous_tick = clock(); |
cparata | 0:1399adb8f248 | 155 | } |
cparata | 0:1399adb8f248 | 156 | } |
cparata | 0:1399adb8f248 | 157 | } |
cparata | 0:1399adb8f248 | 158 | |
cparata | 0:1399adb8f248 | 159 | void INT_cb() { |
cparata | 0:1399adb8f248 | 160 | mems_event = 1; |
cparata | 0:1399adb8f248 | 161 | } |