ST / X_NUCLEO_IKS01A1

Firmware Library for X-NUCLEO-IKS01A1 (MEMS Inertial & Environmental Sensors) Expansion Board

Dependencies:   X_NUCLEO_COMMON ST_INTERFACES

Dependents:   MultiTech_Dragonfly_2015_ATT_Gov_Solutions_Hackathon_Example HelloWorld_IKS01A1 LoRaWAN-test-10secs ServoMotorDemo ... more

Fork of X_NUCLEO_IKS01A1 by ST Expansion SW Team

X-NUCLEO-IKS01A1 MEMS Inertial & Environmental Sensor Nucleo Expansion Board Firmware Package

Introduction

This firmware package includes Components Device Drivers and Board Support Package for STMicroelectronics' X-NUCLEO-IKS01A1 MEMS Inertial & Environmental Sensors Nucleo Expansion Board.

Firmware Library

Class X_NUCLEO_IKS01A1 is intended to represent the MEMS inertial & environmental sensors expansion board with the same name.

The expansion board is basically featuring four IPs:

1. a HTS221 Relative Humidity and Temperature Sensor,
2. a LIS3MDL 3-Axis Magnetometer,
3. a LPS25H MEMS Pressure Sensor, and
4. a LSM6DS0 3D Accelerometer and 3D Gyroscope

The expansion board features also a DIL 24-pin socket which makes it possible to add further MEMS adapters and other sensors (e.g. UV index).

It is intentionally implemented as a singleton because only one X_NUCLEO_IKS01A1 at a time might be deployed in a HW component stack. In order to get the singleton instance you have to call class method `Instance()`, e.g.:

// Sensors expansion board singleton instance
static X_NUCLEO_IKS01A1 *sensors_expansion_board = X_NUCLEO_IKS01A1::Instance();

Furthermore, library ST_INTERFACES contains all abstract classes which together constitute the common API to which all existing and future ST components will adhere to.

Example Applications

• Hello World
• Sensors Reader

--- a/Components/hts221/hts221_class.cpp	Wed Jun 03 15:02:51 2015 +0200
+++ b/Components/hts221/hts221_class.cpp	Wed Jun 03 13:10:04 2015 +0000
@@ -286,8 +286,8 @@
   H_rh = ( float )(((( H_T_out - H0_T0_out ) * ( H1_rh - H0_rh )) / ( H1_T0_out - H0_T0_out )) + H0_rh );
   
   // Truncate to specific number of decimal digits
-  humidity_t = (uint16_t)(H_rh * pow(10, HUM_DECIMAL_DIGITS));
-  *pfData = ((float)humidity_t) / pow(10, HUM_DECIMAL_DIGITS);
+  humidity_t = (uint16_t)(H_rh * pow(10.0f, HUM_DECIMAL_DIGITS));
+  *pfData = ((float)humidity_t) / pow(10.0f, HUM_DECIMAL_DIGITS);
   
   // Prevent data going below 0% and above 100% due to linear interpolation
   if ( *pfData <   0.0f ) *pfData =   0.0f;
@@ -354,9 +354,9 @@
   
   T_degC = ((float)(T_out - T0_out)) / (T1_out - T0_out) * (T1_degC - T0_degC) + T0_degC;
   
-  temperature_t = (int16_t)(T_degC * pow(10, TEMP_DECIMAL_DIGITS));
+  temperature_t = (int16_t)(T_degC * pow(10.0f, TEMP_DECIMAL_DIGITS));
   
-  *pfData = ((float)temperature_t) / pow(10, TEMP_DECIMAL_DIGITS);
+  *pfData = ((float)temperature_t) / pow(10.0f, TEMP_DECIMAL_DIGITS);
   
   return HUM_TEMP_OK;
 }