Experience sound like never before with VS1053 and STM32F031K6
Unleash your soundtrack: Your ultimate MP3 solution!
Published Oct 01, 2024
Click board™
MP3 Click
Dev Board
Nucleo 32 with STM32F031K6 MCU
Compiler
NECTO Studio
MCU
STM32F031K6
Say goodbye to format compatibility issues and focus on what matters most – enjoying your favorite tunes, no matter the file type
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Hardware Overview
How does it work?
MP3 Click is based on the VS1053, an Ogg Vorbis, MP3, AAC, WMA, FLAC, and MIDI audio codec chip from VLSI Solution. It is a versatile MP3 decoder/encoder chip that belongs to VLSI Solution's extensive audio processor family and can decode even newer AAC files. It can decode MPEG 1 and MPEG 2 audio layer III (CBR+VBR+ABR) as parts of the MP3 format, MP1, and MP2, MPEG 4, WAV, General MIDI, and FLAC lossless audio with software plugins up to 24bits and 48KHz. The stereo earphone driver can drive a 30Ω load and has zero-cross detection for smooth volume change. The streaming support for MP3 and WAV, EarSpeaker spatial processing, bass, and treble controls are also included. The VS1053 can encode three different formats from a microphone connector in mono or stereo. Those
formats are lossless 16-bit PCM, IMA ADPSM, and a highly compressed, high-quality Ogg Vorbis with a software plugin. Users can easily implement microcontroller software to read MP3 files chunk by chunk and send them the same way to the host MCU. The MP3 Click receives its input bitstream through a serial input bus, which it listens to as a system peripheral. The input stream is decoded and passed through a digital volume control to an 18-bit oversampling, multi-bit, sigma-delta DAC. The decoding is controlled via a serial control bus. In addition to the basic decoding, adding application-specific features, like DSP effects, to the user RAM is possible. The MP3 Click uses an SPI serial interface to communicate with the host MCU. The SPI is used for both the chip's serial data interface (SDI) and serial control interface
(SCI). The DCS (data chip select) pin forces the serial interface into Standby mode while the chip is activated with a low logic state. In addition, the codec chip can be reset over the RST pin. The data request pin (DREQ) signals if VS1503's 2048-byte FIFO can receive data. It may turn LOW or HIGH anytime, even during a byte transmission. It should be only used to decide whether to send more bytes, while the transmission that has already started doesn't have to be aborted. This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. Also, it comes equipped with a library containing functions and an example code that can be used as a reference for further development.
Features overview
Development board
Nucleo 32 with STM32F031K6 MCU board provides an affordable and flexible platform for experimenting with STM32 microcontrollers in 32-pin packages. Featuring Arduino™ Nano connectivity, it allows easy expansion with specialized shields, while being mbed-enabled for seamless integration with online resources. The
board includes an on-board ST-LINK/V2-1 debugger/programmer, supporting USB reenumeration with three interfaces: Virtual Com port, mass storage, and debug port. It offers a flexible power supply through either USB VBUS or an external source. Additionally, it includes three LEDs (LD1 for USB communication, LD2 for power,
and LD3 as a user LED) and a reset push button. The STM32 Nucleo-32 board is supported by various Integrated Development Environments (IDEs) such as IAR™, Keil®, and GCC-based IDEs like AC6 SW4STM32, making it a versatile tool for developers.
Microcontroller Overview
MCU Card / MCU
Architecture
ARM Cortex-M0
MCU Memory (KB)
32
Silicon Vendor
STMicroelectronics
Pin count
32
RAM (Bytes)
4096
You complete me!
Accessories
Click Shield for Nucleo-32 is the perfect way to expand your development board's functionalities with STM32 Nucleo-32 pinout. The Click Shield for Nucleo-32 provides two mikroBUS™ sockets to add any functionality from our ever-growing range of Click boards™. We are fully stocked with everything, from sensors and WiFi transceivers to motor control and audio amplifiers. The Click Shield for Nucleo-32 is compatible with the STM32 Nucleo-32 board, providing an affordable and flexible way for users to try out new ideas and quickly create prototypes with any STM32 microcontrollers, choosing from the various combinations of performance, power consumption, and features. The STM32 Nucleo-32 boards do not require any separate probe as they integrate the ST-LINK/V2-1 debugger/programmer and come with the STM32 comprehensive software HAL library and various packaged software examples. This development platform provides users with an effortless and common way to combine the STM32 Nucleo-32 footprint compatible board with their favorite Click boards™ in their upcoming projects.
These standard small stereo earphones offer a high-quality listening experience with their top-notch stereo cable and connector. Designed for universal compatibility, they effortlessly connect to all MIKROE mikromedia and multimedia boards, making them an ideal choice for your electronic projects. With a rated power of 100mW, the earphones provide crisp audio across a broad frequency range from 20Hz to 20kHz. They boast a sensitivity of 100 ± 5dB and an impedance of 32Ω ± 15%, ensuring optimal sound quality. The Φ15mm speaker delivers clear and immersive audio. Cost-effective and versatile, these earphones are perfect for testing your prototype devices, offering an affordable and reliable audio solution to complement your projects.
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Nucleo 32 with STM32F031K6 MCU as your development board.
Track your results in real time
Application Output via Debug Mode
1. Once the code example is loaded, pressing the "DEBUG" button initiates the build process, programs it on the created setup, and enters Debug mode.
2. After the programming is completed, a header with buttons for various actions within the IDE becomes visible. Clicking the green "PLAY" button starts reading the results achieved with the Click board™. The achieved results are displayed in the Application Output tab.
Software Support
Library Description
This library contains API for MP3 Click driver.
Key functions:
mp3_cmd_write- This function writes one byte (command) to MP3 audio decodermp3_data_write- This function writes one byte ( data ) to MP3 audio decodermp3_data_write_32- This function Write 32 bytes ( data ) to MP3 audio decoder
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
* \brief Mp3 Click example
*
* # Description
* This app demonstrates the use of MP3 click by playing the specified sound
* from the mp3_resources.h file.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver and performs the default click configuration.
*
* ## Application Task
* Playing the specified sound form the mp3_resources.h file.
*
* \author MikroE Team
*
*/
#include "board.h"
#include "log.h"
#include "mp3.h"
#include "mp3_resources.h"
static mp3_t mp3;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg;
mp3_cfg_t cfg;
/**
* 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.
mp3_cfg_setup( &cfg );
MP3_MAP_MIKROBUS( cfg, MIKROBUS_1 );
mp3_init( &mp3, &cfg );
mp3_reset( &mp3 );
mp3_cmd_write( &mp3, MP3_MODE_ADDR, 0x0800 );
mp3_cmd_write( &mp3, MP3_BASS_ADDR, 0x7A00 );
mp3_cmd_write( &mp3, MP3_CLOCKF_ADDR, 0x2000 );
// MP3 set volume, maximum volume is 0x00 and total silence is 0xFE.
mp3_set_volume( &mp3, 0x2F, 0x2F );
Delay_ms ( 1000 );
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
uint32_t file_size = sizeof ( gandalf_sax_mp3_compressed );
uint32_t file_pos = 0;
uint8_t data_buf[ 32 ] = { 0 };
log_printf( &logger, " Playing audio..." );
for ( file_pos = 0; ( file_pos + 32 ) <= file_size; file_pos += 32 )
{
memcpy ( data_buf, &gandalf_sax_mp3_compressed[ file_pos ], 32 );
while ( MP3_OK != mp3_data_write_32( &mp3, data_buf ) );
}
for ( ; file_pos < file_size; file_pos++ )
{
while ( MP3_OK != mp3_data_write( &mp3, gandalf_sax_mp3_compressed[ file_pos ] ) );
}
log_printf( &logger, "Done\r\n\n" );
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
