STM8S/A Standard Peripherals Firmware Library: Generation of the 3 beep signals

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  * @file    BEEP/BEEP_3SignalsGeneration/readme.txt
  * @author  MCD Application Team
  * @version V2.2.0
  * @date    30-September-2014
  * @brief   This file contains the main function for BEEP 3 Signals Generation example
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  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
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  *        http://www.st.com/software_license_agreement_liberty_v2
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  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
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Example description

This example provides a short description of how to use the BEEP peripheral: Each time the key button is pressed the Beeper frequency changes and a corresponding led will be switched on.

Directory contents

• BEEP\BEEP_3SignalsGeneration\main.c Main file containing the "main" function
• BEEP\BEEP_3SignalsGeneration\stm8s_conf.h Library Configuration file
• BEEP\BEEP_3SignalsGeneration\stm8s_it.c Interrupt routines source (not used in this example)
• BEEP\BEEP_3SignalsGeneration\stm8s_it.h Interrupt routines declaration

Hardware and Software environment

• This example runs on STM8S and STM8A High density, Medium density and Low density devices.

Note:

: to run this example with STM8S Low Density devices, TIM1 should be used instead of TIM3 for LSI calibration.

• This example has been tested with STMicroelectronics STM8/128-EVAL evaluation board and can be easily tailored to any other development board.

• STM8/128-EVAL Set-up
  • Key push button
  • LD1..LD4
  • Mono LCD
  • PD4 used to drive the buzzer

How to use it ?

In order to make the program work, you must do the following :

• Copy all source files from this example folder to the template folder under Project
• Open your preferred toolchain
• Add the required file:
  • stm8s_eval_lcd.c (under Utilities)
• Rebuild all files and load your image into target memory
• Run the example
• Per default, the BEEP signal is OFF and the 4 LEDs are ON.
• Everytime you press the Key button on the board, you will toggle the buzzer frequency in this way: 1kHz -> 2kHz -> 4kHz -> OFF -> 1kHz -> etc...
• The 4 LEDs will toggle respectively.

Hint

• Enable the beeper alternate function
  • with STVD (menu: Debug Instrument -> MCU configuration ->AFR7: Alternate active)
  • with RIDE (edit the "STM8_OB.asm" file to set the AFR7 bit)
  • with EWSTM8 (menu: ST-LINK -> Option bytes ->AFR7: Alternate active)
• Before using the LSI clock you have to configure the option bytes in order to enable the "LSI_EN".
  • with STVD (menu: Debug Instrument -> MCU configuration -> Options -> LSI_EN = Enabled )
  • with RIDE (edit the "STM8_OB.asm" file to configure the OPT3 & NOPT3 option bytes)
  • with EWSTM8 (menu: ST-LINK -> Option bytes -> LSI_EN = Enabled)
• Verify that the JP14 is on the up position (to enable the speaker on the STM8/128-EVAL)
• Verify the speaker volume by adjusting the RV2 potentiometer position on the STM8/128-EVAL

Note:

• High-Density STM8A devices are the STM8AF52xx STM8AF6269/8x/Ax, STM8AF51xx, and STM8AF6169/7x/8x/9x/Ax microcontrollers where the Flash memory density ranges between 32 to 128 Kbytes
• Medium-Density STM8A devices are the STM8AF622x/4x, STM8AF6266/68, STM8AF612x/4x, and STM8AF6166/68 microcontrollers where the Flash memory density ranges between 8 to 32 Kbytes
• High-Density STM8S devices are the STM8S207xx, STM8S007 and STM8S208xx microcontrollers where the Flash memory density ranges between 32 to 128 Kbytes.
• Medium-Density STM8S devices are the STM8S105x and STM8S005 microcontrollers where the Flash memory density ranges between 16 to 32-Kbytes.
• Low-Density STM8S devices are the STM8S103xx, STM8S003 and STM8S903xx microcontrollers where the Flash density is 8 Kbytes.

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