ST UM0501 Manuale utente

June 2009 Doc ID 14320 Rev 3 5/23

UM0501

User manual

STM8/128-EVAL demonstration firmware

Introduction

This document describes the demonstration firmware running on the STM8/128-EVAL

evaluation board. You can use it to evaluate the capabilities of the microcontroller and the

on-board peripherals.

The evaluation board is delivered with the demonstration firmware stored in the Flash

program memory of the microcontroller.

The firmware is based on the STM8S firmware library, and provides an example of how to

use this library. It is divided into various smaller demonstration applications (demos).

In case the STM8/128-EVAL evaluation board is not factory-programmed or the

demonstration application has been erased, you can reprogram the demonstration firmware

into the STM8S2xx Flash memory by following the instructions provided in Section 3.

For more information about the evaluation board itself, please read the evaluation board

user manual.

Note: To run some of the demonstration applications, the option byte must be configured

accordingly. Refer to Section 2.10: BEEPER demo.

www.st.com

Contents UM0501

6/23 Doc ID 14320 Rev 3

Contents

1 User interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.1 Menu structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.2 Documentation conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.3 Navigating menus and sub-menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2 Demonstration applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.1 Menu overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2 Welcome screen and main menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3 Help mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.4 ADC demo 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.5 ADC demo 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.6 ADC demo 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.7 TIMER demo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.8 PWM demo 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.9 PWM demo 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.10 BEEPER demo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.11 MICROSD demo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.12 GAME demo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.13 SYSTEM demo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.14 About menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3 Upgrading the demonstration firmware . . . . . . . . . . . . . . . . . . . . . . . . 19

4 STM8S peripherals used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5 Demo firmware architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

UM0501 User interface

Doc ID 14320 Rev 3 7/23

1 User interface

1.1 Menu structure

The demonstration firmware user interface is based on a circular navigation menu, with

submenus, item selection and back capability.

Figure 1 shows the menu system of the demonstration. The top row of items represents the

main menu.

Figure 1. Menu structure and navigation

1.2 Documentation conventions

In this document, the keywords in bold indicate user actions on the joystick (5-way switch).

The KEY button (1-way switch) and the RV1 potentiometer follow the conventions shown in

Ta bl e 1 .

...

... ...

...

Left / Right Left / Right Left/Right

WELCOME

MESSAGE

ITEM 1 ITEM 2 ITEM 3 ITEM n

ITEM

1.1

ITEM

1.2

ITEM

1.n

ITEM

2.1

ITEM

2.2

ITEM

2.n

SEL

... ... ... ... ...

SEL

Table 1. Documentation conventions

Keyword User action

LEFT Press joystick to the left

RIGHT Press joystick to the right

UP Press joystick up

DOWN Press joystick down

SEL Press joystick center

KEY Press KEY button

RV1 Rotate RV1 potentiometer

User interface UM0501

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1.3 Navigating menus and sub-menus

To navigate the menus and sub-menus, perform the following actions as required.

RIGHT: Navigates to the next menu or sub-menu items on the right.

LEFT: Navigates to the next menu or sub-menu items on the left.

SEL: Enters sub-menu.

UP: Exits from a sub-menu.

UM0501 Demonstration applications

Doc ID 14320 Rev 3 9/23

2 Demonstration applications

2.1 Menu overview

The Figure 2 shows all the menu and submenus of the demonstration applications.

Figure 2. Menu overview

The following sections provides a detailed description of each part of the demonstration

firmware.

2.2 Welcome screen and main menu

After a board RESET, a welcome message is displayed on the first line, the ST logo is

displayed moving on the second line and a melody is played (see Figure 3). The introduction

melody can be changed by using either PWM demo 1 or PWM demo 2 (see Section 2.8 and

Section 2.9).

Figure 3. Welcome message

Once the melody is played, the main menu is activated and the message shown in Figure 4

is displayed.

Figure 4. Main menu

Note: Pressing the joystick in any direction (for around 1 second) ends the melody.

ABOUT

WELCOME MESSAGE

ADC DEMO1

HELP ADC

MAIN MENU

TIMER MICROSD

ADC DEMO2 ADC DEMO3

GAME

PWM1 PWM2

SYSTEM

PWM BEEPER

STM8-128K Demo

** MENU **

HELP - push SEL

Demonstration applications UM0501

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2.3 Help mode

Pressing SEL from the main menu enters the Help mode. The following messages are

displayed sequentially on the LCD screen with a few second delay.

Figure 5. Help mode submenus

To exit this demo, press the joystick UP.

2.4 ADC demo 1

This mode demonstrates the ADC operation that are performed using the RV1

potentiometer on the evaluation board.

The converted value is displayed in different ways (see Figure 6).

●On the LCD first line: in percentage of the ADC range, in hexadecimal and decimal

format

●On the LCD second line: in a bar graph from 0% to 100% of the ADC range.

●On the 4 LEDs: each LED represents approximately 25% of the ADC range.

If KEY is pressed, the converted value is output also on USART1 and/or USART2 interfaces

and/or a sound is played on the buzzer using the timer PWM.

Figure 6. ADC demo 1 message

LEFT or RIGHT

to scroll menu

Press SEL to

enter sub-menu

Move UP to

exit sub-menu

065% 29Eh 0670d

UM0501 Demonstration applications

Doc ID 14320 Rev 3 11/23

UP:Press the joystick UP to exit this demo.

KEY: Press KEY repeatedly to enable the output of each converted value option in turn.

LCD only

LCD+Buzzer

LCD+USART1

LCD+USART2

LCD+USART1+USART2

LCD+USART1+USART2+Buzzer

LCD only

etc...

2.5 ADC demo 2

This is the same as ADC demo 1, except that the CN3 connector on the evaluation board is

used to enter the analog voltage to be converted.

UP: Press the joystick UP to exit this demo.

KEY: Press KEY to enable/disable output values on USART1, USART2 and buzzer as

described in the previous section.

2.6 ADC demo 3

This is the same as ADC demo 1 and ADC demo 2, except that the microphone (U8) is

used.

Note: The JP5 jumper must be installed for this demo to work.

A first message is displayed with a few seconds delay with all LEDs OFF (see Figure 7).

Figure 7. ADC demo 3 message

After 3 “noises” are heard, the demo starts and the LCD displays the same messages as in

ADC demo 1 and demo 2.

UP: Press the joystick UP to exit this demo.

KEY: Press KEY to enable/disable output values on USART1, USART2 and buzzer.

Note: If no sound is detected, you can adjust the microphone level using the RV3 potentiometer.

You can also make a sound by touching the microphone.

Clap 3 times

to wake me up

Demonstration applications UM0501

12/23 Doc ID 14320 Rev 3

2.7 TIMER demo

This mode demonstrates the Timer peripheral operation.

1. To run the TIMER demo, enter the timer start value (from 1 to 18 minutes) using the

RV1 potentiometer (see Figure 8).

Figure 8. Entering the timer start value

2. Once the requested value is set, press SEL on the joystick to start the timer. The

remaining time is displayed on the LCD screen (see Figure 9).

Figure 9. Remaining time message

3. When the value reaches 00:10, a sound is heard for each second elapsed.

When the value reaches 00:00 the four LEDs flash and the message shown in

Figure 10 is displayed.

Figure 10. TIMER demo termination message

UP: Press the joystick UP to exit this demo.

KEY: Press KEY repeatedly to divide counter pulse duration by 2 (1 second, 0.5 second,

0.25 second, ... 31.25 ms, 1 second,...).

TIMER DEMO

03:00

Remaining...

01:45

Terminated!!!

00:00

UM0501 Demonstration applications

Doc ID 14320 Rev 3 13/23

2.8 PWM demo 1

This mode demonstrates the Timer peripheral operating in PWM mode. Make sure that the

JP14 jumper is installed in the bottom position (closer to the LCD).

1. Entering the melody (see Figure 11):

The first LCD line shows the position of the note to enter.

o= Edit mode, the note is selected by using the RV1 potentiometer.

x= Protect mode, the note cannot be changed.

The second LCD line shows the notes to be played with the following convention:

a/A = LA

b/B = SI

c/C = DO

d/D = RE

e/E = MI

f/F = FA

g/G = SOL

s/S = silence or pause

A lowercase letter represent a brief note, and an uppercase letter a long note.

To modify a note, press the joystick LEFT or RIGHT to navigate the notes, and use the

RV1 potentiometer. Then press SEL to confirm.

Once all the notes have been defined, enter an end mark to play the melody.

*= End of notes, the melody is played only once.

8= End of melody, the melody is played in a loop with varying octaves and note

durations.

Figure 11. Defining the melody to be played

2. Playing and saving the melody

●Press SEL on the joystick to play the tune indefinitely.

●Press the joystick UP to stop the melody.

Note: Keep the joystick pressed UP for a short time to allow the action to be taken into account.

●The second time UP is pressed, a message is displayed asking you whether you want

to save the melody or not (see Figure 12).

a) If you press the KEY button, the melody is saved in the external EEPROM.

b) If you press UP on the joystick, you exit from the demo without saving the melody.

aaaBBBccdEE*

Demonstration applications UM0501

14/23 Doc ID 14320 Rev 3

Figure 12. Saving the melody

LEFT/RIGHT: Press the joystick LEFT or RIGHT to navigate the notes.

SEL: Press SEL to confirm a note and go to the next one.

KEY: Press KEY to switch between edit and protected modes.

RV1: Use RV1 potentiometer to define the notes.

2.9 PWM demo 2

This demo also demonstrates the Timer peripheral operating in PWM mode. Make sure that

the JP14 jumper is installed in the bottom position (closer to LCD).

This demo allows to select and play one melody among a selection stored in the Flash

memory (see Figure 13).

1. Navigate between the melodies by pressing the joystick LEFT or RIGHT, and press

SEL to select and play the melody (see Figure 13)

Figure 13. Selecting a melody

2. The first time UP is pressed, the melody is stopped.

Note: Keep the joystick pressed UP for a short time to allow the action to be taken into account.

3. The second time UP is pressed, a message is displayed asking you to save the melody

or not.

a) If you press the KEY button, the melody is saved in the external EEPROM.

a) If you press UP, you exit from the demo without saving the melody.

LEFT/RIGHT: Press the joystick LEFT or RIGHT to navigate the melodies.

SEL: Press SEL to select a melody and play it.

Save melody ?

KEY=YES UP=NO

Select Melody

Bon Tabac

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