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使用STM32L496AG和CMT-8540S-SMT为各种项目添加互动声音元素

穿透噪音：现代蜂鸣器的共振力量

BUZZ 2 Click with Discovery kit with STM32L496AG MCU

已发布 7月 22, 2025

点击板

BUZZ 2 Click

开发板

Discovery kit with STM32L496AG MCU

编译器

NECTO Studio

微控制器单元

STM32L496AG

探索我们的蜂鸣器解决方案如何彻底改变您的日常生活，从增强家庭安全到简化工业流程。

A

A

硬件概览

它是如何工作的？

BUZZ 2 Click基于CMT-8540S-SMT，这是来自CUI Devices的磁性蜂鸣器换能器。蜂鸣器的共振频率为4kHz。该点击板设计为可以使用3.3V或5V电源运行。mikroBUS™线上的PWM引脚控制CMT-8540S-SMT磁性蜂鸣器。您可

以使用我们编译器支持的Sound库来创建不同的声音模式，或利用微控制器内部的PWM模块来为蜂鸣器创建信号。信号频率决定声音的音调，而占空比决定振幅（声音大小）。这个Click board™可以通过VCCIO SEL跳线选择使

用3.3V或5V逻辑电压级别，这样，3.3V和5V能力的MCU都可以正确使用通信线。此外，这个Click board™还配备了一个包含易于使用的功能和示例代码的库，可以作为进一步开发的参考。

BUZZ 2 Click top side image
BUZZ 2 Click bottom side image

功能概述

开发板

32L496GDISCOVERY Discovery 套件是一款功能全面的演示和开发平台，专为搭载 Arm® Cortex®-M4 内核的 STM32L496AG 微控制器设计。该套件适用于需要在高性能、先进图形处理和超低功耗之间取得平衡的应用，支持无缝原型开发，适用于各种嵌入式解决方案。STM32L496AG 采用创新的节能架构，集成

了扩展 RAM 和 Chrom-ART 图形加速器，在提升图形性能的同时保持低功耗，使其特别适用于音频处理、图形用户界面和实时数据采集等对能效要求较高的应用。为了简化开发流程，该开发板配备了板载 ST-LINK/V2-1 调试器/编程器，提供即插即用的调试和编程体验，使用户无需额外硬件即可轻松加载、调

试和测试应用程序。凭借低功耗特性、增强的内存能力以及内置调试工具，32L496GDISCOVERY 套件是开发先进嵌入式系统、实现高效能解决方案的理想选择。

Discovery kit with STM32L496AG MCU double side image

微控制器概述 

MCU卡片 / MCU

STM32L496AG Image

建筑

ARM Cortex-M4

MCU 内存 (KB)

1024

硅供应商

STMicroelectronics

引脚数

169

RAM (字节)

327680

使用的MCU引脚

mikroBUS™映射器

NC
NC
AN
NC
NC
RST
NC
NC
CS
NC
NC
SCK
NC
NC
MISO
NC
NC
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
PWM Buzzer Control
PA0
PWM
NC
NC
INT
NC
NC
TX
NC
NC
RX
NC
NC
SCL
NC
NC
SDA
Power Supply
5V
5V
Ground
GND
GND
1

“仔细看看！”

Click board™ 原理图

BUZZ 2 Click Schematic schematic

一步一步来

项目组装

Discovery kit with STM32H750XB MCU front image hardware assembly

从选择您的开发板和Click板™开始。以Discovery kit with STM32L496AG MCU作为您的开发板开始。

Discovery kit with STM32H750XB MCU front image hardware assembly
Thermo 21 Click front image hardware assembly
Prog-cut hardware assembly
Board mapper by product7 hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
Necto image step 5 hardware assembly
Necto image step 6 hardware assembly
Discovery kit with STM32H750XB MCU NECTO MCU Selection Step hardware assembly
Necto No Display image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Necto image step 11 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

这个库包含了BUZZ 2 Click驱动的API。

关键功能:

  • buzz2_set_duty_cycle - BUZZ 2设置PWM占空比

  • buzz2_play_sound - 播放声音功能

  • buzz2_pwm_start - BUZZ 2启动PWM模块

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 Buzz2 Click example
 *
 * # Description
 * This example demonstrates the use of Buzz 2 Click boards.
 *
 * 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 Jelena Milosavljevic
 *
 */

#include "board.h"
#include "log.h"
#include "buzz2.h"

#define W 4*Q // Whole 4/4 - 4 Beats
#define H 2*Q // Half 2/4 - 2 Beats 
#define Q 250 // Quarter 1/4 - 1 Beat
#define E Q/2 // Eighth 1/8 - 1/2 Beat
#define S Q/4 // Sixteenth 1/16 - 1/4 Beat

#define VOLUME 100 // goes up to 1000

static buzz2_t buzz2;
static log_t logger;

static void imperial_march( ) 
{
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A6, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A6, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A6, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_F6, VOLUME, E + S );
    Delay_ms ( 1 + E + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_C7, VOLUME, S );
    Delay_ms ( 1 + S );
    
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A6, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_F6, VOLUME, E + S );
    Delay_ms ( 1 + E + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_C7, VOLUME, S );
    Delay_ms ( 1 + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A6, VOLUME, H );
    Delay_ms ( 1 + H );
    
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_E7, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_E7, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_E7, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_F7, VOLUME, E + S );
    Delay_ms ( 1 + E + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_C7, VOLUME, S );
    Delay_ms ( 1 + S );
    
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_Ab6, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_F6, VOLUME, E + S );
    Delay_ms ( 1 + E + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_C7, VOLUME, S );
    Delay_ms ( 1 + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A6, VOLUME, H );
    Delay_ms ( 1 + H );
    
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A7, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A6, VOLUME, E + S );
    Delay_ms ( 1 + E + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A6, VOLUME, S );
    Delay_ms ( 1 + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A7, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_Ab7, VOLUME, E + S );
    Delay_ms ( 1 + E + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_G7, VOLUME, S );
    Delay_ms ( 1 + S );
    
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_Gb7, VOLUME, S );
    Delay_ms ( 1 + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_E7, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_F7, VOLUME, E );
    Delay_ms ( 1 + E );
    Delay_ms ( 1 + E );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_Bb6, VOLUME, E );
    Delay_ms ( 1 + E );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_Eb7, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_D7, VOLUME, E + S );
    Delay_ms ( 1 + E + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_Db7, VOLUME, S );
    Delay_ms ( 1 + S );
    
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_C7, VOLUME, S );
    Delay_ms ( 1 + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_B6, VOLUME, S );
    Delay_ms ( 1 + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_C7, VOLUME, E );
    Delay_ms ( 1 + E );
    Delay_ms ( 1 + E );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_F6, VOLUME, E );
    Delay_ms ( 1 + E );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_Ab6, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_F6, VOLUME, E + S );
    Delay_ms ( 1 + E + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A6, VOLUME, S );
    Delay_ms ( 1 + S );
    
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_C7, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A6, VOLUME, E + S );
    Delay_ms ( 1 + E + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_C7, VOLUME, S );
    Delay_ms ( 1 + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_E7, VOLUME, H );
    Delay_ms ( 1 + H );
    
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A7, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A6, VOLUME, E + S );
    Delay_ms ( 1 + E + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A6, VOLUME, S );
    Delay_ms ( 1 + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A7, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_Ab7, VOLUME, E + S );
    Delay_ms ( 1 + E + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_G7, VOLUME, S );
    Delay_ms ( 1 + S );
    
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_Gb7, VOLUME, S );
    Delay_ms ( 1 + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_E7, VOLUME, S );
    Delay_ms ( 1 + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_F7, VOLUME, E );
    Delay_ms ( 1 + E );
    Delay_ms ( 1 + E );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_Bb6, VOLUME, E );
    Delay_ms ( 1 + E );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_Eb7, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_D7, VOLUME, E + S );
    Delay_ms ( 1 + E + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_Db7, VOLUME, S );
    Delay_ms ( 1 + S );
    
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_C7, VOLUME, S );
    Delay_ms ( 1 + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_B6, VOLUME, S );
    Delay_ms ( 1 + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_C7, VOLUME, E );
    Delay_ms ( 1 + E );
    Delay_ms ( 1 + E );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_F6, VOLUME, E );
    Delay_ms ( 1 + E );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_Ab6, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_F6, VOLUME, E + S );
    Delay_ms ( 1 + E + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_C7, VOLUME, S );
    Delay_ms ( 1 + S );
    
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_A6, VOLUME, Q );
    Delay_ms ( 1 + Q );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_F6, VOLUME, E + S );
    Delay_ms ( 1 + E + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_C7, VOLUME, S );
    Delay_ms ( 1 + S );
    buzz2_play_sound(&buzz2, BUZZ2_NOTE_Ab6, VOLUME, H );
    Delay_ms ( 1 + H );
}

void application_init ( void ) {
    log_cfg_t log_cfg;  /**< Logger config object. */
    buzz2_cfg_t buzz2_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.

    buzz2_cfg_setup( &buzz2_cfg );
    BUZZ2_MAP_MIKROBUS( buzz2_cfg, MIKROBUS_1 );
    err_t init_flag  = buzz2_init( &buzz2, &buzz2_cfg );
    if ( init_flag == PWM_ERROR ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    buzz2_set_duty_cycle ( &buzz2, 0.0 );
    buzz2_pwm_start( &buzz2 );
    Delay_ms ( 100 );

    log_info( &logger, " Application Task " );
}

void application_task ( void )
{
    log_printf( &logger, "Playing the Imperial March melody ...\r\n" );
    imperial_march( ); 
    // 10 seconds delay
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    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;
}

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

额外支持

资源

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