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Convert digital code into a symphony of analog perfection using DAC80502 and PIC32MZ2048EFH144

Breathe life into digital signals

DAC 15 Click with EasyPIC Fusion v7

Published Nov 13, 2023

Click board™

DAC 15 Click

Development board

EasyPIC Fusion v7

Compiler

NECTO Studio

MCU

PIC32MZ2048EFH144

Create a universal bridge for converting digital data into rich, analog expressions, catering to diverse needs across industries.

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Hardware Overview

How does it work?

DAC 15 Click is based on the DAC80502, a dual 16-bit 1-LSB INL voltage-output DAC from Texas Instruments. Each device output consists of a rail-to-rail ladder architecture with an output buffer amplifier. The DAC generates rail-to-rail voltages on the output, giving a maximum output range of 0V to a VDD, which depends on a selected voltage on the VCC SEL jumper. The DAC80502 incorporates a power-on-reset circuit that ensures the DAC output powers up at zero scale or midscale based on the RST pin status and remains

at that scale until a valid code is written to the device. DAC 15 Click allows I2C and SPI interfaces to communicate with the host MCU. The I2C interface supports standard, fast, and fast-node plus (1Mbps), whereas while using the last one at 1MHz, the clock update rate is limited to 55.55kSPS. The 3-Wire SPI serial interface operates up to 50kHz and is compatible with SPI, QSPI, and Microwave interface standards. The communication interface can be selected over COMM SEL jumpers. All four jumpers must be set

for the board to work properly (SPI is set by default). If you select the I2C interface, you can also select the I2C address over the ADDR SEL jumper, where 0 is set by default. 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 for further development.

DAC 15 Click hardware overview image

Features overview

Development board

EasyPIC Fusion v7 is the seventh generation of PIC development boards specially designed to develop embedded applications rapidly. It supports a wide range of 16/32-bit PIC microcontrollers from Microchip and a broad set of unique functions, such as a powerful onboard mikroProg programmer and In-Circuit debugger over USB-B. 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. With two different connectors for each port, EasyPIC Fusion v7 allows you to connect accessory boards, sensors, and custom electronics more efficiently than ever. Each part of

the EasyPIC Fusion v7 development board contains the components necessary for the most efficient operation of the same board. An integrated mikroProg, a fast USB 2.0 programmer with mikroICD hardware In-Circuit Debugger, offers many valuable programming/debugging options and seamless integration with the Mikroe software environment. Besides it also includes a clean and regulated power supply block for the development board. It can use a wide range of external power sources, including an external 12V power supply, 7-12V AC or 9-15V DC via DC connector/screw terminals, and a power source via the USB Type-B (USB-B) connector. Communication options such

as USB-UART, USB-HOST, CAN, and Ethernet are also included, including the well-established mikroBUS™ standard, one display option for the TFT board line of products, and a standard TQFP socket for the seventh-generation MCU cards. This socket covers a wide range of 16-bit dsPIC/PIC24 and 32-bit PIC32 MCUs. EasyPIC Fusion v7 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.

EasyPIC Fusion v7 horizontal image

Microcontroller Overview

MCU Card / MCU

default

Type

7th Generation

Architecture

PIC32

MCU Memory (KB)

2048

Silicon Vendor

Microchip

Pin count

144

RAM (Bytes)

524288

Used MCU Pins

mikroBUS™ mapper

NC
NC
AN
Reset
RC1
RST
SPI Chip Select
RC2
CS
SPI Clock
RD15
SCK
NC
NC
MISO
SPI Data IN
RF8
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
NC
NC
PWM
NC
NC
INT
NC
NC
TX
NC
NC
RX
I2C Clock
RA2
SCL
I2C Data
RA3
SDA
Power Supply
5V
5V
Ground
GND
GND
1

Take a closer look

Schematic

DAC 15 Click Schematic schematic

Step by step

Project assembly

EasyPIC Fusion v7 front image hardware assembly

Start by selecting your development board and Click board™. Begin with the EasyPIC Fusion v7 as your development board.

EasyPIC Fusion v7 front image hardware assembly
GNSS2 Click front image hardware assembly
EasyPIC FUSION v7 ETH MCUcard with PIC32MZ2048EFH144 front image hardware assembly
GNSS2 Click complete accessories setup image hardware assembly
EMxPRO-STM32-TIVA/EPIC Fusion v7 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 Compiler Selection Step Image hardware assembly
NECTO Output Selection Step Image hardware assembly
Necto image step 6 hardware assembly
EasyPIC PRO v7a MCU Selection Necto Step hardware assembly
EasyPIC PRO v7a Display Selection Necto Step hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Necto PreFlash Image hardware assembly

Track your results in real time

Application Output

After pressing the "FLASH" button on the left-side panel, it is necessary to open the UART terminal to display the achieved results. By clicking on the Tools icon in the right-hand panel, multiple different functions are displayed, among which is the UART Terminal. Click on the offered "UART Terminal" icon.

UART Application Output Step 1

Once the UART terminal is opened, the window takes on a new form. At the top of the tab are two buttons, one for adjusting the parameters of the UART terminal and the other for connecting the UART terminal. The tab's lower part is reserved for displaying the achieved results. Before connecting, the terminal has a Disconnected status, indicating that the terminal is not yet active. Before connecting, it is necessary to check the set parameters of the UART terminal. Click on the "OPTIONS" button.

UART Application Output Step 2

In the newly opened UART Terminal Options field, we check if the terminal settings are correct, such as the set port and the Baud rate of UART communication. If the data is not displayed properly, it is possible that the Baud rate value is not set correctly and needs to be adjusted to 115200. If all the parameters are set correctly, click on "CONFIGURE".

UART Application Output Step 3

The next step is to click on the "CONNECT" button, after which the terminal status changes from Disconnected to Connected in green, and the data is displayed in the Received data field.

UART Application Output Step 4

Software Support

Library Description

This library contains API for DAC 15 Click driver.

Key functions:

  • dac15_set_dac_data - DAC 15 set DAC data function.

  • dac15_get_dac_data - DAC 15 get DAC data 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 DAC 15 Click example
 *
 * # Description
 * This example demonstrates the use of DAC 15 Click board™ 
 * by changing the output voltage level on the VOUTA and VOUTB.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initialization of I2C or SPI module and log UART.
 * After driver initialization, the app executes a default configuration.
 *
 * ## Application Task
 * The demo application changes the output voltage level on the VOUTA and VOUTB.
 * Results are being sent to the UART Terminal, where you can track their changes.
 *
 * @author Nenad Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "dac15.h"

static dac15_t dac15;
static log_t logger;

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    dac15_cfg_t dac15_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.
    dac15_cfg_setup( &dac15_cfg );
    DAC15_MAP_MIKROBUS( dac15_cfg, MIKROBUS_1 );
    err_t init_flag = dac15_init( &dac15, &dac15_cfg );
    if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( DAC15_ERROR == dac15_default_cfg ( &dac15 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
    log_printf( &logger, " -------------------\r\n" );
    Delay_ms ( 100 );
}

void application_task ( void )
{   
    static uint16_t dac_data = 0;
    for ( uint16_t n_cnt = 0; n_cnt < 60000; n_cnt += 5000 )
    {
        dac_data = n_cnt;
        if ( DAC15_OK == dac15_set_dac_data( &dac15, DAC15_SET_DAC_A, dac_data ) )
        {
            log_printf( &logger, "VOUTA: %u -> %.2f V\r\n", 
                        dac_data, 
                        ( float ) dac_data * DAC15_VREF_3V3 / DAC15_MAX_DAC_DATA );
        }
        
        dac_data = DAC15_DAC_RES_16BIT - n_cnt;
        if ( DAC15_OK == dac15_set_dac_data( &dac15, DAC15_SET_DAC_B, dac_data ) )
        {
            log_printf( &logger, "VOUTB: %u -> %.2f V\r\n", 
                        dac_data, 
                        ( float ) dac_data * DAC15_VREF_3V3 / DAC15_MAX_DAC_DATA );
        }
        log_printf( &logger, " -------------------\r\n" );
        Delay_ms ( 3000 );
    }
}

void main ( void )
{
    application_init( );

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

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

Additional Support

Resources