Intermediate
30 min

Redefine audio quality and deliver the best sonic experience by combining V1000 and ATmega328P

Revolutionizing your sound: Unleash the power of ultimate audio with our multi-effects DSP!

DSP Click with Arduino UNO Rev3

Published Feb 14, 2024

Click board™

DSP Click

Dev Board

Arduino UNO Rev3

Compiler

NECTO Studio

MCU

ATmega328P

Dive into the future of audio with our multi-effects DSP, providing an unmatched audio journey that exceeds all expectations

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Hardware Overview

How does it work?

DSP Click is based on the V1000, a complete multi-effects audio DSP with ultra-high quality audio performance in a rapid ‘time-to-market’ solution from Coolaudio. The V1000 is a specialized microprocessor chip with its architecture optimized for the needs of digital signal processing. It includes serially programmable SRAM for program development and integrated RAM with 16 built-in effects such as multiple reverbs, echo, phaser, chorus, flanger, and more. Alongside the 16 internal programs, programmable SRAM is easily accessible through the I2C serial interface by setting the V1000 to external mode, while in internal mode, the four GPIO pins (P0-P3) may be used to select the different algorithms. Combined with a low-cost codec like the V4220 from Coolaudio, this Click board™ provides an ultra-low-cost FX solution. The V4220 is a high-performance 24-bit audio codec providing stereo A/D and D/A converters using the

latest conversion technology. It operates from a single +5V power supply, features low power consumption, and a selectable de-emphasis filter for 32, 44.1, and 48kHz sample rates. It also includes an analog volume control architecture that can make a 113.5dB attenuation in 0.5dB steps, preserving dynamic range during attenuation. The V4220 provides a serial interface to read/write the internal registers operating in either Master or Slave Mode. This audio player consists of two analog channels, input and output routed to the 3.5mm audio jack connectors. The functional configuration of these audio channels consists of two dual audio operational amplifiers, the RC4580 from Texas Instruments, used as headphone amplifiers. It offers low noise, high gain-bandwidth, low harmonic distortion, and high output current, powered by ±15V obtained by the TPS65131, dual-output DC-DC converter generating a positive output voltage up to 15V and

a negative output voltage down to –15V with output currents in a 200mA range from Texas Instruments. Also, this Click board™ can be reset through the Hardware Reset pin, labeled as RST on the mikroBUS™ socket, and has two jumpers on its bottom side labeled as JP1 and JP2, which very easily adjusts the way the V1000 communicates with the MCU, between I2C communication or IO pins, by positioning SMD jumpers to an appropriate position. Note that all jumpers must be placed on the same side, or the Click board™ may become unresponsive. This Click board™ can be operated only with a 5V 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.

DSP Click top side image
DSP Click bottom side image

Features overview

Development board

Arduino UNO is a versatile microcontroller board built around the ATmega328P chip. It offers extensive connectivity options for various projects, featuring 14 digital input/output pins, six of which are PWM-capable, along with six analog inputs. Its core components include a 16MHz ceramic resonator, a USB connection, a power jack, an

ICSP header, and a reset button, providing everything necessary to power and program the board. The Uno is ready to go, whether connected to a computer via USB or powered by an AC-to-DC adapter or battery. As the first USB Arduino board, it serves as the benchmark for the Arduino platform, with "Uno" symbolizing its status as the

first in a series. This name choice, meaning "one" in Italian, commemorates the launch of Arduino Software (IDE) 1.0. Initially introduced alongside version 1.0 of the Arduino Software (IDE), the Uno has since become the foundational model for subsequent Arduino releases, embodying the platform's evolution.

Arduino UNO Rev3 double side image

Microcontroller Overview

MCU Card / MCU

default

Architecture

AVR

MCU Memory (KB)

32

Silicon Vendor

Microchip

Pin count

28

RAM (Bytes)

2048

You complete me!

Accessories

Click Shield for Arduino UNO has two proprietary mikroBUS™ sockets, allowing all the Click board™ devices to be interfaced with the Arduino UNO board without effort. The Arduino Uno, a microcontroller board based on the ATmega328P, provides an affordable and flexible way for users to try out new concepts and build prototypes with the ATmega328P microcontroller from various combinations of performance, power consumption, and features. The Arduino Uno has 14 digital input/output pins (of which six can be used as PWM outputs), six analog inputs, a 16 MHz ceramic resonator (CSTCE16M0V53-R0), a USB connection, a power jack, an ICSP header, and reset button. Most of the ATmega328P microcontroller pins are brought to the IO pins on the left and right edge of the board, which are then connected to two existing mikroBUS™ sockets. This Click Shield also has several switches that perform functions such as selecting the logic levels of analog signals on mikroBUS™ sockets and selecting logic voltage levels of the mikroBUS™ sockets themselves. Besides, the user is offered the possibility of using any Click board™ with the help of existing bidirectional level-shifting voltage translators, regardless of whether the Click board™ operates at a 3.3V or 5V logic voltage level. Once you connect the Arduino UNO board with our Click Shield for Arduino UNO, you can access hundreds of Click boards™, working with 3.3V or 5V logic voltage levels.

Click Shield for Arduino UNO accessories 1 image

Used MCU Pins

mikroBUS™ mapper

Program Selection
PC0
AN
Reset
PD2
RST
Program Selection
PB2
CS
NC
NC
SCK
NC
NC
MISO
NC
NC
MOSI
NC
NC
3.3V
Ground
GND
GND
Program Selection
PD6
PWM
Program Selection
PC3
INT
NC
NC
TX
NC
NC
RX
I2C Clock
PC5
SCL
I2C Data
PC4
SDA
Power Supply
5V
5V
Ground
GND
GND
1

Take a closer look

Schematic

DSP Click Schematic schematic

Step by step

Project assembly

Click Shield for Arduino UNO front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Arduino UNO Rev3 as your development board.

Click Shield for Arduino UNO front image hardware assembly
Arduino UNO Rev3 front image hardware assembly
Charger 27 Click front image hardware assembly
Prog-cut hardware assembly
Charger 27 Click complete accessories setup image hardware assembly
Arduino UNO Rev3 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
Arduino UNO MCU 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 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.

DEBUG_Application_Output

Software Support

Library Description

This library contains API for DSP Click driver.

Key functions:

  • dsp_set_effect - DSP reverb and multi-effects setting function

  • dsp_power_on - DSP power on the device function

  • dsp_reset - DSP reset the device function

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 DSP Click Example.
 *
 * # Description
 * This application controls reverb and multi-effects Digital Multi-Effects DSP 
 * provides different sound performance of the DSP Click.  
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initializes GPIO driver, set the default configuration and start to write log.
 *
 * ## Application Task
 * This is an example that shows the use of a DSP click board.
 * In this example, we change different sound effects
 * such as multiple reverbs, echo, phaser, chorus, flanger, etc. every 10 sec.
 * Results are being sent to the Usart Terminal where you can track their changes.
 *
 * @author Nenad Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "dsp.h"

static dsp_t dsp;       /**< DSP Click driver object. */
static log_t logger;    /**< Logger object. */
static uint8_t effects = DSP_SET_EFFECT_MEDIUM; 


void display_effects ( void ) {
    switch ( effects ) {
        case DSP_SET_EFFECT_MEDIUM: {
            log_printf( &logger, " Reverb, Small hall (1.5 sec.)\r\n" );
            break;
        }
        case DSP_SET_EFFECT_CHAMBR7B: {
            log_printf( &logger, " Reverb, Big hall (2.8 sec.)\r\n" );
            break;
        }
        case DSP_SET_EFFECT_ROOM3B: {
            log_printf( &logger, " Reverb, Room (1.8 sec.)\r\n" );
            break;
        }
        case DSP_SET_EFFECT_CHAMBER2: {
            log_printf( &logger, " Reverb, Church (7 sec.)\r\n" );
            break;
        }
        case DSP_SET_EFFECT_REVERS3B: {
            log_printf( &logger, " Reverb Reverse (1.2 sec.)\r\n" );
            break;
        }
        case DSP_SET_EFFECT_GATED4B: {
            log_printf( &logger, " Reverb Gated (0.8 sec.)\r\n" );
            break;
        }
        case DSP_SET_EFFECT_ROOM2A: {
            log_printf( &logger, " Reverb Chapel (3 sec.)\r\n" );
            break;
        }
        case DSP_SET_EFFECT_SPRING3B: {
            log_printf( &logger, " Reverb Spring (2 sec.)\r\n" );
            break;
        } 
        case DSP_SET_EFFECT_PHASER1: {
            log_printf( &logger, " Phaser\r\n" );
            break;
        }
        case DSP_SET_EFFECT_FLANGER2: {
            log_printf( &logger, " Flanger\r\n" );
            break;
        }
        case DSP_SET_EFFECT_DELAY7: {
            log_printf( &logger, " Echo\r\n" );
            break;
        }
        case DSP_SET_EFFECT_CHORUS4: {
            log_printf( &logger, " Chorus\r\n" );
            break;
        }
        case DSP_SET_EFFECT_EARLREF4: {
            log_printf( &logger, " Early Reflection\r\n" );
            break;
        }
        case DSP_SET_EFFECT_AMB4: {
            log_printf( &logger, " Big Ambience\r\n" );
            break;
        }
        case DSP_SET_EFFECT_DELAY3: {
            log_printf( &logger, " Stereo Delay\r\n" );
            break;
        }
        case DSP_SET_EFFECT_DELAY1: {
            log_printf( &logger, " Slap-back Delay\r\n" );
            break;
        }
        default: {
            log_error( &logger, " Error" );
            break;
        }
    }     
}

void application_init ( void ) {
    log_cfg_t log_cfg;  /**< Logger config object. */
    dsp_cfg_t dsp_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_printf( &logger, "\r\n" );
    log_info( &logger, " Application Init " );

    // Click initialization.

    dsp_cfg_setup( &dsp_cfg );
    DSP_MAP_MIKROBUS( dsp_cfg, MIKROBUS_1 );
    if ( dsp_init( &dsp, &dsp_cfg ) == DIGITAL_OUT_UNSUPPORTED_PIN ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }
    dsp_default_cfg ( &dsp );   
    log_info( &logger, " Application Task \r\n" );
    Delay_ms( 100 );
    
    log_printf( &logger, "-------------------------------\r\n" );
    log_printf( &logger, "           DSP click           \r\n" );
    log_printf( &logger, "-------------------------------\r\n" );
    log_printf( &logger, "     Digital Multi-Effects     \r\n" );
}

void application_task ( void ) {
    log_printf( &logger, "-------------------------------\r\n" );
    dsp_set_effect( &dsp, effects );
    display_effects( );
    
    effects++;
    if ( effects > DSP_SET_EFFECT_DELAY1 ) {
        effects = DSP_SET_EFFECT_MEDIUM;
    }

    Delay_ms( 10000 );  
}

void main ( void ) {
    application_init( );

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

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

Additional Support

Resources

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