Step into the future of audio signaling with next-gen buzzers and witness their transformative impact across a wide spectrum of industries and settings
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Hardware Overview
How does it work?
Buzz 3 Click is based on the PAM8904, a piezo-sounder driver with an integrated Multi-Mode charge pump boost converter from Diodes Incorporated. The PAM8904 is a switching driver with a multi-mode charge pump for piezo-sounder. Operating at a fixed frequency of 1MHz, the PAM8904 can drive a sounder load of up to 15nF, providing a 9V output with a minimal component footprint. For adjusting the piezoelectric sounder sound volume, the charge pump can operate in 1x, 2x, or 3x mode. It features thermal shutdown, over-current and voltage protection, and under-voltage lock-out and provides a small inrush current, low EMI, and high efficiency. The sounder driver helps to keep current consumption low and battery life long by employing built-in automatic shutdown and wake-up functions. For example, active current consumption is just 300µA in 1x mode, with an
input voltage of 3V, input frequency of 4kHz, and driving a 15nF piezo. In shutdown mode, the quiescent current is less than 1µA. The Charge Pump Mode pins, EN1 and EN2, are used to set the charge pump into mode 1xVDD, 2xVDD, 3xVDD, or they can be used to put the PAM8904 into a forced low-current Shutdown Mode. The device enters the Normal Operation Mode when one or both EN pins are pulled high. Once the PAM8904 senses a valid signal on the DIN pin, the charge pump will start and provide the desired voltage on the VOUT pin, and the output drive lines labeled as VO1 and VO2 will become active after a period of between 270μs and 350μs depending on the selected Mode. If a valid signal on the DIN line disappears, the PAM8904 will detect that disappearance and then wait 42ms to ensure its disappearance. If, even after this period, there is no valid signal on the DIN line, the PAM8904 switches
to low-current Standby Mode. Buzz 3 Click establishes communication with MCU using several GPIO pins routed on the RST, AN, and PWM pins of the mikroBUS™ socket labeled EN1, EN2, and DIN. There is also a jumper setting labeled as INT BUZZ used to choose between single-ended and differential load configurations and between driving either the onboard piezo-sounder or an externally connected piezo-sounder. 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.
Features overview
Development board
UNI-DS 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 STM32, Kinetis, TIVA, CEC, MSP, PIC, dsPIC, PIC32, and AVR MCUs regardless of their number of pins, and a broad set of unique functions, such as the first-ever embedded debugger/programmer over WiFi. 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, UNI-DS v8 provides a fluid and immersive working experience, allowing access anywhere and under any
circumstances at any time. Each part of the UNI-DS 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. UNI-DS 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)
512
Silicon Vendor
STMicroelectronics
Pin count
100
RAM (Bytes)
81920
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Schematic
Step by step
Project assembly
Track your results in real time
Application Output
After pressing the "FLASH" button on the left-side panel, it is necessary to open the UART terminal to display the achieved results. By clicking on the Tools icon in the right-hand panel, multiple different functions are displayed, among which is the UART Terminal. Click on the offered "UART Terminal" icon.
Once the UART terminal is opened, the window takes on a new form. At the top of the tab are two buttons, one for adjusting the parameters of the UART terminal and the other for connecting the UART terminal. The tab's lower part is reserved for displaying the achieved results. Before connecting, the terminal has a Disconnected status, indicating that the terminal is not yet active. Before connecting, it is necessary to check the set parameters of the UART terminal. Click on the "OPTIONS" button.
In the newly opened UART Terminal Options field, we check if the terminal settings are correct, such as the set port and the Baud rate of UART communication. If the data is not displayed properly, it is possible that the Baud rate value is not set correctly and needs to be adjusted to 115200. If all the parameters are set correctly, click on "CONFIGURE".
The next step is to click on the "CONNECT" button, after which the 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 BUZZ 3 Click driver.
Key functions:
buzz3_pwm_start
- This function starts the PWM module outputbuzz3_set_gain_operating_mode
- The function set gain operating mode of the PAM8904 piezo sounder driver with integrated charge pump boost converter on Buzz 3 Clickbuzz3_play_sound
- This function plays sound on buzzer
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 Buzz3 Click example
*
* # Description
* This example demonstrates the use of Buzz 3 click boards with PAM8904 for play the Imperial March.
* PAM8904 is piezo-sounder driver with an integrated Multi-Mode charge pump boost converter from Diodes Incorporated.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes GPIO, set AN and RST pin as outputs, begins to write a log.
* Initialization driver enables - GPIO and configures the appropriate MCU pin for
* sound generation, also write log.
*
* ## Application Task
* Plays the Imperial March melody. Also logs an appropriate message on the USB UART.
*
* Additional Functions :
* - void buzz3_melody( void ) - This function plays the Imperial March melody.
*
* @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 "buzz3.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
static buzz3_t buzz3;
static log_t logger;
void buzz3_melody ( void ) {
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A6, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A6, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A6, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_F6, E + S );
Delay_ms( 1 + E + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_C7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A6, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_F6, E + S );
Delay_ms( 1 + E + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_C7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A6, H );
Delay_ms( 1 + H );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_E7, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_E7, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_E7, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_F7, E + S );
Delay_ms( 1 + E + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_C7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_Ab6, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_F6, E + S );
Delay_ms( 1 + E + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_C7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A6, H );
Delay_ms( 1 + H );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A7, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A6, E + S );
Delay_ms( 1 + E + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A6, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A7, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_Ab7, E + S );
Delay_ms( 1 + E + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_G7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_Gb7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_E7, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_F7, E );
Delay_ms( 1 + E );
Delay_ms( 1 + E );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_Bb6, E );
Delay_ms( 1 + E );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_Eb7, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_D7, E + S );
Delay_ms( 1 + E + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_Db7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_C7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_B6, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_C7, E );
Delay_ms( 1 + E );
Delay_ms( 1 + E );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_F6, E );
Delay_ms( 1 + E );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_Ab6, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_F6, E + S );
Delay_ms( 1 + E + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A6, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_C7, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A6, E + S );
Delay_ms( 1 + E + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_C7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_E7, H );
Delay_ms( 1 + H );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A7, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A6, E + S );
Delay_ms( 1 + E + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A6, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A7, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_Ab7, E + S );
Delay_ms( 1 + E + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_G7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_Gb7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_E7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_F7, E );
Delay_ms( 1 + E );
Delay_ms( 1 + E );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_Bb6, E );
Delay_ms( 1 + E );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_Eb7, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_D7, E + S );
Delay_ms( 1 + E + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_Db7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_C7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_B6, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_C7, E );
Delay_ms( 1 + E );
Delay_ms( 1 + E );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_F6, E );
Delay_ms( 1 + E );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_Ab6, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_F6, E + S );
Delay_ms( 1 + E + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_C7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_A6, Q );
Delay_ms( 1 + Q );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_F6, E + S );
Delay_ms( 1 + E + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_C7, S );
Delay_ms( 1 + S );
buzz3_play_sound(&buzz3, BUZZ3_NOTE_Ab6, H );
Delay_ms( 1 + H );
}
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
buzz3_cfg_t buzz3_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.
buzz3_cfg_setup( &buzz3_cfg );
BUZZ3_MAP_MIKROBUS( buzz3_cfg, MIKROBUS_1 );
err_t init_flag = buzz3_init( &buzz3, &buzz3_cfg );
if ( PWM_ERROR == init_flag )
{
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
buzz3_default_cfg ( &buzz3 );
buzz3_set_duty_cycle ( &buzz3, 0.0 );
log_printf( &logger, "---------------------\r\n" );
log_printf( &logger, " Set the gain to x1 \r\n" );
log_printf( &logger, "---------------------\r\n" );
Delay_ms( 100 );
buzz3_pwm_start( &buzz3 );
buzz3_set_gain_operating_mode( &buzz3, BUZZ3_OP_MODE_GAIN_x1 );
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
log_printf( &logger, " Play the music \r\n" );
buzz3_melody( );
log_printf( &logger, "---------------------\r\n" );
Delay_ms( 1000 );
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END