October 2010

Doc ID 17983 Rev 1

1/13

AN3280

Application Note

Displaying variable voltage on a bar of LEDs

using STM8S-DISCOVERY

Application overview

This application note provides a short description of how to use the ADC, Timer and GPIO

peripherals.

Once the STM8S105C6T6 has been powered-up through a USB cable connected to the

host PC, the Timer triggers the ADC according to a user-defined period to convert the

analog voltage provided by variable resistor RV1. The resulting average voltage

measurement is represented on the LED bar.

Even though the STM8S-DISCOVERY is built around an STM8S105C6T6, it allows

evaluation of the main features of all the STM8S MCUs.

Reference documents

(UM0834).

www.st.com