Beginner
10 min

Ensure a captivating sound experience with LM48100Q-Q1 and STM32F031K6

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AudioAmp Click with Nucleo 32 with STM32F031K6 MCU

Published Oct 01, 2024

Click board™

AudioAmp Click

Dev. board

Nucleo 32 with STM32F031K6 MCU

Compiler

NECTO Studio

MCU

STM32F031K6

Don't let poor audio quality hold you back. Add a stereo amplifier to your solution and unlock its full potential

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Hardware Overview

How does it work?

AudioAmp Click is based on the LM48100Q-Q1, a Boomer™ mono, 1.3W audio power amplifier with output fault detection and volume control from Texas Instruments. It has an input mixer and multiplexer, high PSRR, short circuit and thermal protection, advanced click-and-pop suppression, and more. Dual audio input can be mixed/multiplexed to the device output with an independent 32-step volume control. The high power supply rejection ratio (PSRR) allows the device to operate in noisy environments without additional power supply conditioning. In addition, its superior click-and-pop suppression eliminates audible transients on power up/down and during a

shutdown. As mentioned, the LM48100Q-Q1 also features a comprehensive output fault detection system that senses the load conditions, protects the device during short circuit events, and detects open circuit conditions. There are two functional modes for fault diagnostics. In One-Shot mode, after performing the test sequence, enable diagnostic bit is ignored, and the test sequence will not be rerun. In Continuous diagnostic mode, the test sequence is repeated until the device is reset, taken out of this mode, or a fault condition occurs. The AudioAmp Click communicates with the host MCU using the standard I2C 2-Wire interface to read data and configure settings,

supporting a Fast mode operation up to 400KHz. The I2C address can be chosen over the ADDR selection jumper, with 0 selected by default. The fault conditions can be observed via the FLT pin of the mikroBUS™ socket, with a LOW logic state if a fault condition has occurred. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the PWR SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. However, the 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. 

AudioAmp Click hardware overview image

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.

Nucleo 32 with STM32F031K6 MCU double side image

Microcontroller Overview

MCU Card / MCU

default

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.

Click Shield for Nucleo-32 accessories 1 image

Used MCU Pins

mikroBUS™ mapper

NC
NC
AN
NC
NC
RST
NC
NC
CS
NC
NC
SCK
NC
NC
MISO
NC
NC
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
NC
NC
PWM
Fault Interrupt
PA12
INT
NC
NC
TX
NC
NC
RX
I2C Clock
PB6
SCL
I2C Data
PB7
SDA
Power Supply
5V
5V
Ground
GND
GND
1

Take a closer look

Click board™ Schematic

AudioAmp Click Schematic schematic

Step by step

Project assembly

Click Shield for Nucleo-144 front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Nucleo 32 with STM32F031K6 MCU as your development board.

Click Shield for Nucleo-144 front image hardware assembly
Nucleo 144 with STM32L4A6ZG MCU front image hardware assembly
Stepper 22 Click front image hardware assembly
Prog-cut hardware assembly
Stepper 22 Click complete accessories setup image hardware assembly
Nucleo-32 with STM32 MCU Access MB 1 - upright/background hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
Necto image step 5 hardware assembly
Necto image step 6 hardware assembly
STM32 M4 Clicker HA MCU/Select Step hardware assembly
Necto No Display image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Debug Image Necto Step hardware assembly

Track your results in real time

Application Output

1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.

2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.

3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.

Software Support

Library Description

This library contains API for AudioAmp Click driver.

Key functions:

  • audioamp_set_volume - Set mux volume function

  • audioamp_set_volume_channel - Set channel volume function

  • audioamp_set_normal_operation - Set normal opeation 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 AudioAmp Click example
 * 
 * # Description
 * AudioAmp Click is a stereo audio amplifier which can be controlled by using this
 * click driver.
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init
 * Performs driver and log module initialization, enables I2C, turns on the AudioAmp device
 * and sends a message about init status.
 * 
 * ## Application Task
 * This is a example which demonstrates the use and control of the AudioAmp Click board.
 * 
 * \author Nemanja Medakovic
 *
 */

#include "board.h"
#include "log.h"
#include "audioamp.h"

static audioamp_t audioamp;
static log_t logger;

void application_init ( void )
{
    log_cfg_t log_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... ----" );

    audioamp_cfg_t audioamp_cfg;

    //  Click initialization.

    audioamp_cfg_setup( &audioamp_cfg );
    AUDIOAMP_MAP_MIKROBUS( audioamp_cfg, MIKROBUS_1 );

    if ( audioamp_init( &audioamp, &audioamp_cfg ) == AUDIOAMP_INIT_ERROR )
    {
        log_info( &logger, "---- Application Init Error. ----" );
        log_info( &logger, "---- Please, run program again... ----" );

        for ( ; ; );
    }

    log_info( &logger, "---- Application Init Done. ----" );
    log_info( &logger, "---- Application Running... ----" );
    log_info( &logger, "---- Check your audio speaker. ----\n" );

    audioamp_power_on( &audioamp );
}

void application_task ( void )
{
    log_info( &logger, "---- Volume level control testing... ----" );

    audioamp_set_volume( &audioamp, AUDIOAMP_IN_1 | AUDIOAMP_IN_2, 5 );
    Delay_ms( 3000 );
    audioamp_set_volume( &audioamp, AUDIOAMP_IN_1 | AUDIOAMP_IN_2, 15 );
    Delay_ms( 3000 );
    audioamp_set_volume( &audioamp, AUDIOAMP_IN_1 | AUDIOAMP_IN_2, 25 );
    Delay_ms( 3000 );
    audioamp_set_volume( &audioamp, AUDIOAMP_IN_1 | AUDIOAMP_IN_2, 32 );
    Delay_ms( 3000 );

    log_info( &logger, "---- Volume level control test done. ----" );
    log_info( &logger, "---- Input mute/unmute control testing... ----" );

    audioamp_mute( &audioamp );
    Delay_ms( 3000 );
    audioamp_unmute( &audioamp );
    Delay_ms( 10000 );

    log_info( &logger, "---- Input mute/unmute control test done. ----" );
}

void main ( void )
{
    application_init( );

    for ( ; ; )
    {
        application_task( );
    }
}

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

Additional Support

Resources

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