Create simple sounds including beeps and buzzers with PAM8906 and MSP432P401R

Piezoelectric sounder

Piezo Driver Click with Fusion for Tiva v8

Published Dec 10, 2023

Click board™

Piezo Driver Click

Dev Board

Fusion for Tiva v8

Compiler

NECTO Studio

MCU

MSP432P401R

Convert electrical energy into mechanical vibrations and produce audible sound waves

Hardware Overview

How does it work?

Piezo Driver Click is based on the PAM8906, a piezo sounder driver with self-excitation mode from Diodes Incorporated. It features automatic shutdown and wake-up control, low operating current, very short turn ON/OFF, over-voltage protection, over-current protection, and more. This driver operates with an external PWM input. It can drive a two-terminal or three-terminal piezo sounder, and selection can be made over the

TERMINAL SEL jumper. The piezo sounder can be connected over the 3-pin screw terminal, labeled differently for both available options. In addition, you can use VOUT to power up the piezo sounder. Piezo Driver Click uses a PWM input pin to communicate with the host MCU. The PWM input will be amplified and driven to the output terminal if used as an external PWM control. It can also be used for automatic wake-up and shutdown

control. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.

Piezo Driver Click hardware overview image

Features overview

Development board

Fusion for TIVA v8 is a development board specially designed for the needs of rapid development of embedded applications. It supports a wide range of microcontrollers, such as different 32-bit ARM® Cortex®-M based MCUs from Texas Instruments, regardless of their number of pins, and a broad set of unique functions, such as the first-ever embedded debugger/programmer over a WiFi network. The development board is well organized and designed so that the end-user has all the necessary elements, such as switches, buttons, indicators, connectors, and others, in one place. Thanks to innovative manufacturing technology, Fusion for TIVA v8 provides a fluid and immersive working experience, allowing access

anywhere and under any circumstances at any time. Each part of the Fusion for TIVA v8 development board contains the components necessary for the most efficient operation of the same board. An advanced integrated CODEGRIP programmer/debugger module offers many valuable programming/debugging options, including support for JTAG, SWD, and SWO Trace (Single Wire Output)), and seamless integration with the Mikroe software environment. Besides, it also includes a clean and regulated power supply module for the development board. It can use a wide range of external power sources, including a battery, an external 12V power supply, and a power source via the USB Type-C (USB-C) connector.

Communication options such as USB-UART, USB HOST/DEVICE, CAN (on the MCU card, if supported), and Ethernet is also included. In addition, it also has the well-established mikroBUS™ standard, a standardized socket for the MCU card (SiBRAIN standard), and two display options for the TFT board line of products and character-based LCD. Fusion for TIVA v8 is an integral part of the Mikroe ecosystem for rapid development. Natively supported by Mikroe software tools, it covers many aspects of prototyping and development thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.

Microcontroller Overview

MCU Card / MCU

Type

8th Generation

Architecture

ARM Cortex-M4

MCU Memory (KB)

256

Silicon Vendor

Texas Instruments

Pin count

100

RAM (Bytes)

65536

Used MCU Pins

mikroBUS™ mapper

RST

ID COMM

P1.4

SCK

MISO

MOSI

Power Supply

3.3V

Ground

GND

PWM Control

P2.5

PWM

INT

SCL

SDA

Power Supply

Ground

GND

Take a closer look

Click board™ Schematic

Step by step

Project assembly

Fusion for PIC v8 front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Fusion for Tiva v8 as your development board.

NECTO Output Selection Step Image hardware assembly

In the advanced settings, pay special attention to the Redirect standard output field. By default, it is set to Application output as the method of displaying final results. To show results via a UART terminal, select the “UART” option in that field and click the “SAVE” button. You will be returned to the Compiler field, and now you can move on to the next step by pressing the “NEXT” button.

GNSS2 Click front image hardware assembly

SiBRAIN for PIC32MZ1024EFK144 front image hardware assembly

GNSS2 Click complete accessories setup image hardware assembly

v8 SiBRAIN Access MB 1 - upright/background hardware assembly

NECTO Compiler Selection Step Image hardware assembly

Track your results in real time

Application Output via UART Mode

1. Once the code example is loaded, pressing the "FLASH" button initiates the build process, and programs it on the created setup.

2. After the programming is completed, click on the Tools icon in the upper-right panel, and select the UART Terminal.

3. After opening the UART Terminal tab, first check the baud rate setting in the Options menu (default is 115200). If this parameter is correct, activate the terminal by clicking the "CONNECT" button.

4. Now terminal status changes from Disconnected to Connected in green, and the data is displayed in the Received data field.

Software Support

Library Description

This library contains API for Piezo Driver Click driver.

Key functions:

piezodriver_pwm_stop - Piezo Driver stop PWM module.
piezodriver_pwm_start - Piezo Driver start PWM module.
piezodriver_play_sound - Piezo Driver play sound function.

Open Source

Code example

This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.

/*!
 * @file main.c
 * @brief Piezo Driver Click example
 *
 * # Description
 * This example demonstrates the use of Piezo Driver Click board.
 *
 * 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. 
 * 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 certain architectures
 * in order to get the required PWM clock frequency.
 *
 * @author Stefan Ilic
 *
 */

#include "board.h"
#include "log.h"
#include "piezodriver.h"

static piezodriver_t piezodriver;
static log_t logger;

#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 

/**
 * @brief Piezo Driver play Imperial march function.
 * @details This function is used to play Imperial march on the buzzer.
 * @return Nothing.
 * @note None.
 */
static void imperial_march( );

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    piezodriver_cfg_t piezodriver_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.
    piezodriver_cfg_setup( &piezodriver_cfg );
    PIEZODRIVER_MAP_MIKROBUS( piezodriver_cfg, MIKROBUS_1 );
    if ( PWM_ERROR == piezodriver_init( &piezodriver, &piezodriver_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( PIEZODRIVER_ERROR == piezodriver_default_cfg ( &piezodriver ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

void application_task ( void ) 
{
    log_printf( &logger, "Playing the Imperial March melody ...\r\n" );
    imperial_march( ); 
    Delay_ms( 10000 );
}

int main ( void ) 
{
    application_init( );
    
    for ( ; ; ) 
    {
        application_task( );
    }

    return 0;
}

static void imperial_march( ) 
{
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A6, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A6, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A6, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_F6, VOLUME, E + S );
    Delay_ms( 1 + E + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_C7, VOLUME, S );
    Delay_ms( 1 + S );
    
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A6, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_F6, VOLUME, E + S );
    Delay_ms( 1 + E + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_C7, VOLUME, S );
    Delay_ms( 1 + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A6, VOLUME, H );
    Delay_ms( 1 + H );
    
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_E7, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_E7, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_E7, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_F7, VOLUME, E + S );
    Delay_ms( 1 + E + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_C7, VOLUME, S );
    Delay_ms( 1 + S );
    
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_AB6, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_F6, VOLUME, E + S );
    Delay_ms( 1 + E + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_C7, VOLUME, S );
    Delay_ms( 1 + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A6, VOLUME, H );
    Delay_ms( 1 + H );
    
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A7, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A6, VOLUME, E + S );
    Delay_ms( 1 + E + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A6, VOLUME, S );
    Delay_ms( 1 + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A7, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_AB7, VOLUME, E + S );
    Delay_ms( 1 + E + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_G7, VOLUME, S );
    Delay_ms( 1 + S );
    
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_GB7, VOLUME, S );
    Delay_ms( 1 + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_E7, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_F7, VOLUME, E );
    Delay_ms( 1 + E );
    Delay_ms( 1 + E );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_BB6, VOLUME, E );
    Delay_ms( 1 + E );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_EB7, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_D7, VOLUME, E + S );
    Delay_ms( 1 + E + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_DB7, VOLUME, S );
    Delay_ms( 1 + S );
    
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_C7, VOLUME, S );
    Delay_ms( 1 + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_B6, VOLUME, S );
    Delay_ms( 1 + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_C7, VOLUME, E );
    Delay_ms( 1 + E );
    Delay_ms( 1 + E );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_F6, VOLUME, E );
    Delay_ms( 1 + E );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_AB6, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_F6, VOLUME, E + S );
    Delay_ms( 1 + E + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A6, VOLUME, S );
    Delay_ms( 1 + S );
    
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_C7, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A6, VOLUME, E + S );
    Delay_ms( 1 + E + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_C7, VOLUME, S );
    Delay_ms( 1 + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_E7, VOLUME, H );
    Delay_ms( 1 + H );
    
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A7, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A6, VOLUME, E + S );
    Delay_ms( 1 + E + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A6, VOLUME, S );
    Delay_ms( 1 + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A7, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_AB7, VOLUME, E + S );
    Delay_ms( 1 + E + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_G7, VOLUME, S );
    Delay_ms( 1 + S );
    
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_GB7, VOLUME, S );
    Delay_ms( 1 + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_E7, VOLUME, S );
    Delay_ms( 1 + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_F7, VOLUME, E );
    Delay_ms( 1 + E );
    Delay_ms( 1 + E );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_BB6, VOLUME, E );
    Delay_ms( 1 + E );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_EB7, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_D7, VOLUME, E + S );
    Delay_ms( 1 + E + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_DB7, VOLUME, S );
    Delay_ms( 1 + S );
    
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_C7, VOLUME, S );
    Delay_ms( 1 + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_B6, VOLUME, S );
    Delay_ms( 1 + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_C7, VOLUME, E );
    Delay_ms( 1 + E );
    Delay_ms( 1 + E );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_F6, VOLUME, E );
    Delay_ms( 1 + E );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_AB6, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_F6, VOLUME, E + S );
    Delay_ms( 1 + E + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_C7, VOLUME, S );
    Delay_ms( 1 + S );
    
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_A6, VOLUME, Q );
    Delay_ms( 1 + Q );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_F6, VOLUME, E + S );
    Delay_ms( 1 + E + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_C7, VOLUME, S );
    Delay_ms( 1 + S );
    piezodriver_play_sound(&piezodriver, PIEZODRIVER_NOTE_AB6, VOLUME, H );
    Delay_ms( 1 + H );
}

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