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Hardware Overview
How does it work?
BUZZ 2 Click is based on the CMT-8540S-SMT, a magnetic buzzer transducer from CUI Devices. The buzzer's resonant frequency is 4kHz. The click is designed to run on either a 3.3V or 5V power supply. The PWM pin on the mikroBUS™ line controls the CMT-8540S-SMT magnetic buzzer. You can create different sound patterns using
the Sound library supported in our compilers or utilize the microcontroller's internal PWM module to create the signal for the buzzer. Signal frequency determines the sound pitch, and the duty cycle determines the amplitude (sound volume). This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the
VCCIO 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
Fusion for STM32 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 STMicroelectronics, 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, Fusion for STM32 v8 provides a fluid and immersive working experience, allowing
access anywhere and under any circumstances at any time. Each part of the Fusion for STM32 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 STM32 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-M0
MCU Memory (KB)
32
Silicon Vendor
STMicroelectronics
Pin count
48
RAM (Bytes)
8192
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Schematic
Step by step
Project 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 BUZZ 2 Click driver.
Key functions:
buzz2_set_duty_cycle
- BUZZ 2 sets PWM duty cyclebuzz2_play_sound
- Play sound functionbuzz2_pwm_start
- BUZZ 2 start PWM module
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 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