October 2012

Doc ID 018809 Rev 1

1/24

AN3397

Application note

Temperature sensor example using the STM8L-DISCOVERY board

Introduction

This application note proposes two methods for measuring and displaying temperature

using the STM8L built-in temperature sensor connected to the STM8L-DISCOVERY board.

The two methods are illustrated in the application code example provided with this

application note within two configurable modes: normal and advanced.

More generally, this application note explains the care that should be taken with the

temperature sensor, and describes the peripheral settings and configuration required to

develop the temperature sensor application.

The temperature sensor application does not require any additional hardware. Once the

STM8L-DISCOVERY is powered up through a USB cable connected to the host PC, the

application immediately starts, and the chip temperature is continuously displayed on the

liquid crystal display (LCD). The minimum and maximum temperatures recorded over the

past runtime period are automatically stored by the application, and are available for display

by pressing the 'user' push button on the STM8L-DISCOVERY. The temperature tendency

information is displayed as a bar graph on the LCD.

Reference documents

(UM0991)

The above documents are available on www.st.com.

Table 1.

Applicable products and tools

Type

Part number or product category

Microcontrollers

STM8L Ultra Low Power

Evaluation tools

STM8L-DISCOVERY

www.st.com