使用CPT-7502-65-SMT-TR和STM32F031K6为您的项目添加声音警报或反馈

用于在各种电子应用中产生声音信号的压电蜂鸣器换能器

Buzzer Click with Nucleo 32 with STM32F031K6 MCU

已发布 10月 01, 2024

点击板

Buzzer Click

开发板

Nucleo 32 with STM32F031K6 MCU

编译器

NECTO Studio

微控制器单元

STM32F031K6

为安全系统生成声音警报，或为各种项目提供通知或提醒的声音信号

硬件概览

它是如何工作的？

Buzzer Click基于CUI Devices的CPT-7502-65-SMT-TR压电蜂鸣器传感器，设计用于在表面贴装封装中提供高效且可靠的声音输出。该蜂鸣器外形紧凑，尺寸为7.5x7.5x2mm，提供65dB的声压级，确保在各种应用中产生清晰且显眼的声音。它是外部驱动的，意味着需要外部电路进行激活，这个电路已经集成在板上。该蜂鸣器仅消耗1mA的低电流，适合电池供电的设备。此Click板™采用了一种独特的设计，支持

MIKROE新推出的“Click Snap”功能。与标准版的Click板不同，此功能允许通过断开PCB使主传感器区域可移动，开辟了许多新的实现可能性。得益于Snap功能，CPT-7502-65-SMT-TR可以通过直接访问标记为1-8的引脚自主运行。此外，Snap部分包含指定和固定的螺丝孔位置，使用户能够将Snap板固定在所需位置。此Click板™使用N沟道MOSFET通过PWM信号控制蜂鸣器，实现对声音频率和强度的精确调制。当

应用PWM信号时，MOSFET使电流流过压电蜂鸣器，激活蜂鸣器并产生声音。这种设置为蜂鸣器输出提供了灵活性，使其成为各种电子项目中的多功能声音信号解决方案。此Click板™可以在3.3V或5V逻辑电平下运行，可通过VCC SEL跳线进行选择。这样，支持3.3V和5V逻辑电平的MCU都可以正确使用通信线路。此外，该Click板™还配备了包含易于使用的函数和示例代码的库，可作为进一步开发的参考。

功能概述

开发板

Nucleo 32开发板搭载STM32F031K6 MCU，提供了一种经济且灵活的平台，适用于使用32引脚封装的STM32微控制器进行实验。该开发板具有Arduino™ Nano连接性，便于通过专用扩展板进行功能扩展，并且支持mbed，使其能够无缝集成在线资源。板载集成

ST-LINK/V2-1调试器/编程器，支持通过USB重新枚举，提供三种接口：虚拟串口（Virtual Com port）、大容量存储和调试端口。该开发板的电源供应灵活，可通过USB VBUS或外部电源供电。此外，还配备了三个LED指示灯（LD1用于USB通信，LD2用于电源

指示，LD3为用户可控LED）和一个复位按钮。STM32 Nucleo-32开发板支持多种集成开发环境（IDEs），如IAR™、Keil®和基于GCC的IDE（如AC6 SW4STM32），使其成为开发人员的多功能工具。

Nucleo 32 with STM32F031K6 MCU double side image

微控制器概述

MCU卡片 / MCU

建筑

ARM Cortex-M0

MCU 内存 (KB)

硅供应商

STMicroelectronics

引脚数

RAM (字节)

4096

你完善了我！

配件

Click Shield for Nucleo-32是扩展您的开发板功能的理想选择，专为STM32 Nucleo-32引脚布局设计。Click Shield for Nucleo-32提供了两个mikroBUS™插座，可以添加来自我们不断增长的Click板™系列中的任何功能。从传感器和WiFi收发器到电机控制和音频放大器，我们应有尽有。Click Shield for Nucleo-32与STM32 Nucleo-32开发板兼容，为用户提供了一种经济且灵活的方式，使用任何STM32微控制器快速创建原型，并尝试各种性能、功耗和功能的组合。STM32 Nucleo-32开发板无需任何独立的探针，因为它集成了ST-LINK/V2-1调试器/编程器，并随附STM32全面的软件HAL库和各种打包的软件示例。这个开发平台为用户提供了一种简便且通用的方式，将STM32 Nucleo-32兼容开发板与他们喜欢的Click板™结合，应用于即将开展的项目中。

Click Shield for Nucleo-32 accessories 1 image

使用的MCU引脚

mikroBUS™映射器

RST

ID COMM

PA4

SCK

MISO

MOSI

Power Supply

3.3V

Ground

GND

PWM Signal

PA8

PWM

INT

SCL

SDA

Power Supply

Ground

GND

“仔细看看！”

Click board™ 原理图

一步一步来

项目组装

Click Shield for Nucleo-144 front image hardware assembly

从选择您的开发板和Click板™开始。以Nucleo 32 with STM32F031K6 MCU作为您的开发板开始。

Nucleo 144 with STM32L4A6ZG MCU front image hardware assembly

2x4 RGB Click front image hardware assembly

Nucleo-32 with STM32 MCU MB 1 - upright/background hardware assembly

Clicker 4 for STM32F4 HA MCU Step hardware assembly

Necto No Display image step 8 hardware assembly

Debug Image Necto Step hardware assembly

实时跟踪您的结果

应用程序输出

1. 应用程序输出 - 在调试模式下，“应用程序输出”窗口支持实时数据监控，直接提供执行结果的可视化。请按照提供的教程正确配置环境，以确保数据正确显示。

2. UART 终端 - 使用UART Terminal通过USB to UART converter监视数据传输，实现Click board™与开发系统之间的直接通信。请根据项目需求配置波特率和其他串行设置，以确保正常运行。有关分步设置说明，请参考提供的教程。

3. Plot 输出 - Plot功能提供了一种强大的方式来可视化实时传感器数据，使趋势分析、调试和多个数据点的对比变得更加直观。要正确设置，请按照提供的教程，其中包含使用Plot功能显示Click board™读数的分步示例。在代码中使用Plot功能时，请使用以下函数：plot(insert_graph_name, variable_name);。这是一个通用格式，用户需要将“insert_graph_name”替换为实际图表名称，并将“variable_name”替换为要显示的参数。

软件支持

库描述

该库包含 Buzzer Click 驱动程序的 API。

关键功能:

buzzer_play_sound - 此函数在蜂鸣器上播放声音。

开源

代码示例

完整的应用程序代码和一个现成的项目可以通过NECTO Studio包管理器直接安装到NECTO Studio。应用程序代码也可以在MIKROE的GitHub账户中找到。

/*!
 * @file main.c
 * @brief Buzzer Click example
 *
 * # Description
 * This example demonstrates the use of Buzzer click board by playing
 * the Imperial March melody on the buzzer.
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init 
 * Initializes the driver and logger.
 * 
 * ## Application Task  
 * Plays the Imperial March melody. Also logs an appropriate message on the USB UART.
 * 
 * @note
 * The minimal PWM Clock frequency required for this example is the frequency of tone C6 - 1047 Hz. 
 * So, in order to run this example and play all tones correctly, the user will need to decrease 
 * the MCU's main clock frequency in MCU Settings for the certain architectures
 * in order to get the required PWM clock frequency.
 *
 * @author Stefan Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "buzzer.h"

static buzzer_t buzzer;
static log_t logger;

/**
 * @brief Buzzer imperial march function.
 * @details This function plays the Imperial March melody on the buzzer
 * at the selected volume level.
 * @param[in] volume : Buzz sound level. ( min = 1, max = 100 )
 * @return None.
 * @note None.
 */
static void buzzer_imperial_march ( uint8_t volume );

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    buzzer_cfg_t buzzer_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    buzzer_cfg_setup( &buzzer_cfg );
    BUZZER_MAP_MIKROBUS( buzzer_cfg, MIKROBUS_1 );
    if ( PWM_ERROR == buzzer_init( &buzzer, &buzzer_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

void application_task ( void ) 
{
    log_printf( &logger, " Playing the Imperial March melody...\r\n" );
    buzzer_imperial_march( BUZZER_VOLUME_MAX ); 
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

int main ( void ) 
{
    /* Do not remove this line or clock might not be set correctly. */
    #ifdef PREINIT_SUPPORTED
    preinit();
    #endif
    
    application_init( );
    
    for ( ; ; ) 
    {
        application_task( );
    }

    return 0;
}

static void buzzer_imperial_march ( uint8_t volume )
{
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A6, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A6, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A6, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_F6, volume, BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_C7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A6, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_F6, volume, BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_C7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A6, volume, BUZZER_NOTE_LEN_HALF );
    Delay_ms ( BUZZER_NOTE_LEN_HALF );
    
    buzzer_play_sound( &buzzer, BUZZER_NOTE_E7, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_E7, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_E7, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_F7, volume, BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_C7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    
    buzzer_play_sound( &buzzer, BUZZER_NOTE_Ab6, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_F6, volume, BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_C7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A6, volume, BUZZER_NOTE_LEN_HALF );
    Delay_ms ( BUZZER_NOTE_LEN_HALF );
    
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A7, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A6, volume, BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A6, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A7, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_Ab7, volume, BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_G7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    
    buzzer_play_sound( &buzzer, BUZZER_NOTE_Gb7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_E7, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_F7, volume, BUZZER_NOTE_LEN_EIGHTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_Bb6, volume, BUZZER_NOTE_LEN_EIGHTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_Eb7, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_D7, volume, BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_Db7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    
    buzzer_play_sound( &buzzer, BUZZER_NOTE_C7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_B6, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_C7, volume, BUZZER_NOTE_LEN_EIGHTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_F6, volume, BUZZER_NOTE_LEN_EIGHTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_Ab6, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_F6, volume, BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A6, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    
    buzzer_play_sound( &buzzer, BUZZER_NOTE_C7, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A6, volume, BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_C7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_E7, volume, BUZZER_NOTE_LEN_HALF );
    Delay_ms ( BUZZER_NOTE_LEN_HALF );
    
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A7, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A6, volume, BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A6, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A7, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_Ab7, volume, BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_G7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    
    buzzer_play_sound( &buzzer, BUZZER_NOTE_Gb7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_E7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_F7, volume, BUZZER_NOTE_LEN_EIGHTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_Bb6, volume, BUZZER_NOTE_LEN_EIGHTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_Eb7, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_D7, volume, BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_Db7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    
    buzzer_play_sound( &buzzer, BUZZER_NOTE_C7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_B6, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_C7, volume, BUZZER_NOTE_LEN_EIGHTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_F6, volume, BUZZER_NOTE_LEN_EIGHTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_Ab6, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_F6, volume, BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_C7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    
    buzzer_play_sound( &buzzer, BUZZER_NOTE_A6, volume, BUZZER_NOTE_LEN_QUARTER );
    Delay_ms ( BUZZER_NOTE_LEN_QUARTER );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_F6, volume, BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_EIGHTH + BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_C7, volume, BUZZER_NOTE_LEN_SIXTEENTH );
    Delay_ms ( BUZZER_NOTE_LEN_SIXTEENTH );
    buzzer_play_sound( &buzzer, BUZZER_NOTE_Ab6, volume, BUZZER_NOTE_LEN_HALF );
    Delay_ms ( BUZZER_NOTE_LEN_HALF );
}

// ------------------------------------------------------------------------ END