ST
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.
Diff: main.cpp
- Revision:
- 5:b747a8948606
- Parent:
- 3:3c8bce3cdf2f
- Child:
- 6:acde79c5a18a
--- a/main.cpp Mon Jun 03 09:48:11 2019 +0000
+++ b/main.cpp Wed Jul 24 14:56:10 2019 +0000
@@ -4,7 +4,7 @@
* @author SRA
* @version V1.0.0
* @date 5-March-2019
- * @brief Simple Example application for using the X_NUCLEO_IKS01A3
+ * @brief Simple Example application for using the X_NUCLEO_IKS01A3
* MEMS Inertial & Environmental Sensor Nucleo expansion board.
******************************************************************************
* @attention
@@ -34,20 +34,20 @@
* 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 STTS751Sensor *t_sensor = mems_expansion_board->t_sensor;
DigitalOut myled(LED1);
-
+
volatile int mems_event = 0;
uint32_t previous_tick = 0;
uint32_t current_tick = 0;
@@ -58,104 +58,106 @@
void INT_cb();
/* Helper function for printing floats & doubles */
-static char *print_double(char* str, double v, int decimalDigits=2)
+static char *print_double(char *str, double v, int decimalDigits = 2)
{
- int i = 1;
- int intPart, fractPart;
- int len;
- char *ptr;
+ int i = 1;
+ int intPart, fractPart;
+ int len;
+ char *ptr;
- /* prepare decimal digits multiplicator */
- for (;decimalDigits!=0; i*=10, decimalDigits--);
+ /* prepare decimal digits multiplicator */
+ for (; decimalDigits != 0; i *= 10, decimalDigits--);
- /* calculate integer & fractinal parts */
- intPart = (int)v;
- fractPart = (int)((v-(double)(int)v)*i);
+ /* calculate integer & fractinal parts */
+ intPart = (int)v;
+ fractPart = (int)((v - (double)(int)v) * i);
- /* fill in integer part */
- sprintf(str, "%i.", intPart);
+ /* fill in integer part */
+ sprintf(str, "%i.", intPart);
- /* prepare fill in of fractional part */
- len = strlen(str);
- ptr = &str[len];
+ /* prepare fill in of fractional part */
+ len = strlen(str);
+ ptr = &str[len];
- /* fill in leading fractional zeros */
- for (i/=10;i>1; i/=10, ptr++) {
- if (fractPart >= i) {
- break;
+ /* fill in leading fractional zeros */
+ for (i /= 10; i > 1; i /= 10, ptr++) {
+ if (fractPart >= i) {
+ break;
+ }
+ *ptr = '0';
}
- *ptr = '0';
- }
- /* fill in (rest of) fractional part */
- sprintf(ptr, "%i", fractPart);
+ /* fill in (rest of) fractional part */
+ sprintf(ptr, "%i", fractPart);
- return str;
+ return str;
}
/* Simple main function */
-int main() {
- /* Attach callback to STTS751 INT */
- t_sensor->attach_int_irq(&INT_cb);
-
- /* Enable STTS751 temperature sensor */
- t_sensor->enable();
- /* Set ODR to 4Hz */
- t_sensor->set_odr(4.0f);
- /* Set Low Temperature Threshold */
- t_sensor->set_low_temp_thr(22.0f);
- /* Set High Temperature Threshold */
- t_sensor->set_high_temp_thr(28.0f);
- /* Enable Event pin */
- t_sensor->set_event_pin(1);
- /* Get beginning status */
- t_sensor->get_temp_limit_status(NULL, NULL, NULL);
+int main()
+{
+ /* Attach callback to STTS751 INT */
+ t_sensor->attach_int_irq(&INT_cb);
+
+ /* Enable STTS751 temperature sensor */
+ t_sensor->enable();
+ /* Set ODR to 4Hz */
+ t_sensor->set_odr(4.0f);
+ /* Set Low Temperature Threshold */
+ t_sensor->set_low_temp_thr(22.0f);
+ /* Set High Temperature Threshold */
+ t_sensor->set_high_temp_thr(28.0f);
+ /* Enable Event pin */
+ t_sensor->set_event_pin(1);
+ /* Get beginning status */
+ t_sensor->get_temp_limit_status(NULL, NULL, NULL);
+
+ previous_tick = clock();
+
+ printf("\r\n--- Starting new run ---\r\n");
- previous_tick = clock();
-
- printf("\r\n--- Starting new run ---\r\n");
-
- while(1) {
- if (mems_event) {
- mems_event=0;
- uint8_t high_temp = 0, low_temp = 0;
- t_sensor->get_temp_limit_status(&high_temp, &low_temp, NULL);
- if (high_temp){
- high = 1;
- low = 0;
- }
- if (low_temp){
- low = 1;
- high = 0;
- }
-
- t_sensor->get_temperature(&temperature);
- myled = 1;
- wait(0.1);
- myled = 0;
- }
+ while (1) {
+ if (mems_event) {
+ mems_event = 0;
+ uint8_t high_temp = 0, low_temp = 0;
+ t_sensor->get_temp_limit_status(&high_temp, &low_temp, NULL);
+ if (high_temp) {
+ high = 1;
+ low = 0;
+ }
+ if (low_temp) {
+ low = 1;
+ high = 0;
+ }
+
+ t_sensor->get_temperature(&temperature);
+ myled = 1;
+ wait(0.1);
+ myled = 0;
+ }
- current_tick = clock();
- if (((current_tick - previous_tick)/CLOCKS_PER_SEC) >= 2){
- if (!high && !low){
- t_sensor->get_temperature(&temperature);
- }
- printf("Temp[C]: ");
- printf("%7s C", print_double(buffer, temperature));
- if (high){
- printf(" High temperature detected!(>28C) \r\n");
- high = 0;
- } else if (low) {
- printf(" Low temperature detected!(<22C) \r\n");
- low = 0;
- } else {
- printf("\r\n");
- }
- previous_tick = clock();
+ current_tick = clock();
+ if (((current_tick - previous_tick) / CLOCKS_PER_SEC) >= 2) {
+ if (!high && !low) {
+ t_sensor->get_temperature(&temperature);
+ }
+ printf("Temp[C]: ");
+ printf("%7s C", print_double(buffer, temperature));
+ if (high) {
+ printf(" High temperature detected!(>28C) \r\n");
+ high = 0;
+ } else if (low) {
+ printf(" Low temperature detected!(<22C) \r\n");
+ low = 0;
+ } else {
+ printf("\r\n");
+ }
+ previous_tick = clock();
+ }
}
- }
}
-
-void INT_cb() {
- mems_event = 1;
+
+void INT_cb()
+{
+ mems_event = 1;
}