Software description

AN3397

18/24

Doc ID 018809 Rev 1

3.2.2

User calibration routine flowchart

The user calibration routine performs the ADC measurement (see Section 2.4.3: Calibration

values are stored in the Data EEPROM.

This routine is automatically launched in temperature sensor Advanced mode when the user

calibration point has not been previously processed. It may also be forced by the user if the

calibration point is to be updated.

Before proceeding to this calibration, the #define Tambient in the main.c file must be

updated with the ambient temperature value of the environment. It is set by default to 25 (for

25 °C).

As shown in Figure 6, the temperature measurement is averaged from 20 acquisition

samples, and the resulting data is stored in the EEPROM to be re-used even after

STM8L-DISCOVERY is powered off.