UM1014 User Manual

Introduction

The STM8L-DISCOVERY, based on the STM8L152C6T6, is a quick-start evaluation board for 8-bit ultralow-power MCUs. It offers the cheapest and quickest way to discover the STM8L, program and use the device, and build and debug applications. It includes the embedded debugger ST-LINK and an IDD measurement feature to help explore ultralow power efficiency.

Connect the STM8L-DISCOVERY to a PC via a standard USB cable to run the pre-programmed example. The debugger allows real-time code execution tracking. Numerous application examples are provided for learning, reusing, and modifying source code, suitable for quick proof-of-concept evaluations or demonstration prototypes. The STM8L-DISCOVERY is ideal for hobbyists, developers, students, and support teams.

Use this document as a guide to quickly become familiar with the STM8L-DISCOVERY and its capabilities. For user manuals and application notes related to the STM8L-DISCOVERY, visit www.st.com/stm8l-discovery.

Reference Documents

• STM8L-DISCOVERY evaluation board user manual (UM0970)
• STM8L-DISCOVERY software user manual: Developing and debugging your STM8L-DISCOVERY application code (UM0991)
• ST Visual Develop (STVD) user manual (UM0036)
• Introduction to STM8L15x power saving modes using the STM8L-DISCOVERY IDD measurement feature (AN3269)
• Building a wave generator using STM8L-DISCOVERY (AN3252)
• STM8L15x reference manual (RM0031)
• STM8L15xx datasheet

1 Getting started

1.1 System requirements

Before using the STM8L-DISCOVERY, the following material is required:

• A Windows PC (2000, XP, Vista)
• A USB type A to mini-B cable

1.2 Quick start tutorial (less than 20 min)

Start running one of the many STM8L-DISCOVERY application examples from scratch in less than 20 minutes.

1.2.1 Software environment

1. Download your free software environment (IDE). Choose between:

• ST's MCU toolset: ST Visual Develop (STVD) and ST Visual Programmer (STVP), available on www.st.com.
• IAR Embedded Workbench for STM8 Kickstart edition (8K-limited), available on www.iar.com, Downloads tab.

Note: While IAR Embedded Workbench for STM8 includes its own compiler, STVD must be used with either Cosmic or Raisonance compilers.

2. Download your free compilers:

• Cosmic 16 K: www.cosmicsoftware.com/download_stm8_16k.php
• Cosmic 32 K (one-year limited): www.cosmicsoftware.com/download_stm8_32k.php
• Raisonance 32 K: www.mcu-raisonance.com

Please note that the Cosmic 32 K version does not include direct support from Cosmic. For installation details, read Chapter 2 of UM0991, available on www.st.com/stm8l-discovery.

1.2.2 Connect the STM8L-DISCOVERY to the host PC

The STM8L-DISCOVERY comes pre-programmed with the Discover demo, showcasing the STM8L15x power-saving modes using the built-in IDD measurement feature.

Connect the STM8L-DISCOVERY to your PC using a USB cable. The application starts immediately, displaying dynamically on the LCD. The user can select the STM8L real-time power consumption in each mode using the User push-button. Download application note AN3269 from www.st.com/stm8l-discovery for more details about this demo.

1.2.3 Running the STM8L-DISCOVERY application examples

Numerous application examples for the STM8L-DISCOVERY are available on www.st.com/stm8l-discovery.

Ensure your free software environment (STVD) is correctly installed.

1. Download an application example and its associated application note from www.st.com/stm8l-discovery and extract the directory STM8L-DISCOVERY_Example on your PC.

• Cosmic: STM8L-Discovery_Example/Project/Example/STVD/Cosmic/Example.stw
• Raisonance: STM8L-Discovery_Example/Project/Example/STVD/Raisonance/Example.stw

2. Configure STVD to use ST-LINK as a debug instrument:

• Click Debug Instrument -> Target Settings.
• Select target Swim ST-LINK in the target list.

3. Select the appropriate MCU:

• Go to Projects > Settings > MCU and select STM8L152C6 from the MCU list.
• Ensure the MCU is displayed in the "selected MCU" field before clicking OK.

4. Click Build -> Rebuild All to build your application.

5. Click Debug -> Start Debugging to download your application to the STM8L program memory and start the debug session.

6. Run the application code in Debug or Stand-alone mode:

• a) Click Debug -> Run to run in debug mode.
• b) Click Debug -> Stop Debugging to disconnect the debugger; the application then runs immediately in stand-alone mode.

Once the selected application is running, check if it operates as described in the associated application note.

Note: Some examples may require additional components. Refer to the specific application note for details.

1.2.4 Developing your own application

1. Install your chosen free software environment (IDE and/or compilers) as per Section 1.2.1.

2. Install the STM8L-DISCOVERY development package:

• Download STM8L-Discovery_dev.zip from www.st.com/stm8l-discovery (available with UM0991). Extract the directory structure on your PC.
• Duplicate the project_template directory and rename it (e.g., My_own_project).

3. Run your Integrated Development Environment.

4. Select File -> Open Workspace.

5. Browse for the project file (.stw) of My_own_project according to your selected IDE/compiler:

• STVD with Cosmic: STM8L-Discovery_My_own_project/Project/My_own_project/STVD/Cosmic/STVD_workspace.stw
• STVD with Raisonance: STM8L-Discovery_My_own_project/Project/My_own_project/STVD/Raisonance/STVD_workspace.stw
• IAR Embedded Workbench (EWSTM8): STM8L-Discovery_My_own_project/Project/My_own_project/STVD/EWSTM8/workspace.stw

This procedure provides a pre-structured project workspace, simplifying your project design. Detailed instructions on project creation are in user manual UM0991, available for download from www.st.com/stm8l-discovery.

2 Support

Visit the STM8L-DISCOVERY forum on www.st.com/stm8l-discovery.

Contact technical support on www.st.com.

3 Revision history

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