Improve your audio experience with KT403A and MK64FN1M0VDC12

Your favorite tunes, just a click away

Published Sep 13, 2023

Click board™

MP3 2 Click

Dev. board

Clicker 2 for Kinetis

Compiler

NECTO Studio

MCU

MK64FN1M0VDC12

Our cutting-edge MP3 solution empowers you to immerse yourself in the world of music with unparalleled clarity and convenience. It's your ultimate companion for enjoying your favorite tunes anytime, anywhere.

Hardware Overview

How does it work?

MP3 2 Click is based on the KT403A, a SOC chip solution with intergraded MCU, hardware audio MP3/WAV decoder and DSP, from Shenzhen Qianle Microelectronics Technology, as a main integrated circuit, micro SD card connector, and 3.5mm Audio Jack connector. Basically, it is a complete solution for a DAP (digital audio player) on a Click board, which can be controlled over the UART communication interface, using RX and TX pins of the mikroBUS™ socket. The default baud rate is 9600bps and it is customizable. On the MP3 2 Click, KT403A serves as a brain. It is complete SOC, which integrates16-bit MCU, audio decoder, and a 24-bit DSP. It also integrates the complete SD card interface and therefore, this click board

contains the connector onboard for an external micro SD card. Thanks to that, the user can insert a fair amount of memory if the long, continuous playback time is needed. MP3 2 Click has two status indication LEDs, onboard. The first one is named “SD Card” and it serves as an indication that the SD Card is present in the slot. The other one is “Chip Correct” and it indicates that the SD Card is correct and that the communication between the KT403A and the SD Card sucseeded. Besides the indicatora, there is one 3.5mm headphone jack onboard, so that MP3 2 Click can be connected directly to the next stage of the music playback system, ie. audio amplifier. Using the predefined command set, MP3 2 Click can be

fully controlled. One can Play/Pause a song, play a specific track, change a Volume Up and Volume Down between 0% and 100%, play the next or the previous song, repeat the current song, and more. Besides that, several sound effects are also supported, mentioned for different types of music: Normal, Jazz, Classic, Pop, and Rock. 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

Clicker 2 for Kinetis is a compact starter development board that brings the flexibility of add-on Click boards™ to your favorite microcontroller, making it a perfect starter kit for implementing your ideas. It comes with an onboard 32-bit ARM Cortex-M4F microcontroller, the MK64FN1M0VDC12 from NXP Semiconductors, two mikroBUS™ sockets for Click board™ connectivity, a USB connector, LED indicators, buttons, a JTAG programmer connector, and two 26-pin headers for interfacing with external electronics. Its compact design with clear and easily recognizable silkscreen markings allows you to build gadgets with unique functionalities and

features quickly. Each part of the Clicker 2 for Kinetis development kit contains the components necessary for the most efficient operation of the same board. In addition to the possibility of choosing the Clicker 2 for Kinetis programming method, using a USB HID mikroBootloader or an external mikroProg connector for Kinetis programmer, the Clicker 2 board also includes a clean and regulated power supply module for the development kit. It provides two ways of board-powering; through the USB Micro-B cable, where onboard voltage regulators provide the appropriate voltage levels to each component on the board, or

using a Li-Polymer battery via an onboard battery connector. All communication methods that mikroBUS™ itself supports are on this board, including the well-established mikroBUS™ socket, reset button, and several user-configurable buttons and LED indicators. Clicker 2 for Kinetis is an integral part of the Mikroe ecosystem, allowing you to create a new application in minutes. Natively supported by Mikroe software tools, it covers many aspects of prototyping 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

Architecture

ARM Cortex-M4

MCU Memory (KB)

1024

Silicon Vendor

NXP

Pin count

121

RAM (Bytes)

262144

Used MCU Pins

mikroBUS™ mapper

Reset

PB11

RST

SCK

MISO

MOSI

Power Supply

3.3V

Ground

GND

PWM

INT

UART TX

PD3

UART RX

PD2

SCL

SDA

Power Supply

Ground

GND

Take a closer look

Click board™ Schematic

Step by step

Project assembly

Clicker 2 for PIC32MZ front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Clicker 2 for Kinetis as your development board.

GNSS2 Click front image hardware assembly

GNSS2 Click complete accessories setup image hardware assembly

Board mapper by product7 hardware assembly

Flip&Click PIC32MZ MCU step hardware assembly

Necto No Display image step 8 hardware assembly

Debug Image Necto Step hardware assembly

Software Support

Library Description

This library contains API for MP3 2 Click driver.

Key functions:

mp32_hw_reset - Reset the device function
mp32_rx_cmd - Received response data function
mp32_tx_cmd - Write command function.

Open Source

Code example

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

/*!
 * \file 
 * \brief Mp32 Click example
 * 
 * # Description
 * This example demonstates the use of MP3 2 Click board.
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init 
 * Initializes the driver and enables the Click board.
 * Then sets the device to play songs from SD Card, and after that sets volume, and equalizer.
 * 
 * ## Application Task  
 * Demonstrates the use of play, play next, and pause modes.
 * Each step will be logged on the USB UART where you can track the program flow.
 * 
 * @note
 * A valid microSD Card that contains at least one mp3 sound on it needs to be 
 * inserted into the Click board.
 * 
 * \author MikroE Team
 *
 */
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "mp32.h"
#include "string.h"

// ------------------------------------------------------------------ VARIABLES

static mp32_t mp32;
static log_t logger;

// ------------------------------------------------------ APPLICATION FUNCTIONS

void application_init ( void )
{
    log_cfg_t log_cfg;
    mp32_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.

    mp32_cfg_setup( &cfg );
    MP32_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    mp32_init( &mp32, &cfg );

    Delay_ms ( 500 );

    log_printf( &logger, "-------------------------\r\n" );
    log_printf( &logger, "       MP3 2 Click       \r\n" );
    log_printf( &logger, "-------------------------\r\n" );
    Delay_100ms( );

    mp32_hw_reset( &mp32 );
    Delay_ms ( 100 );
    
    mp32_set_device( &mp32, MP32_SDCARD );
    mp32_set_volume( &mp32, 50 );
    mp32_set_eq( &mp32, MP32_EQ_NORMAL );
    Delay_ms ( 100 );
}

void application_task ( void )
{
    log_printf( &logger, " >>> Play\r\n" );
    mp32_play_mode( &mp32 );
    // 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 );
    log_printf( &logger, " >>> Next song\r\n" );
    mp32_play_next( &mp32 );
    // 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 );
    log_printf( &logger, " >>> Pause\r\n" );
    mp32_pause_mode( &mp32 );
    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