Beginner
10 min

Manage various sensors and actuators with our I2C adapter and PIC32MZ2048EFM100

One Click to rule them all: Uniting devices on a single bus

8-pin I2C Click with Curiosity PIC32 MZ EF

Published Nov 11, 2023

Click board™

8-pin I2C Click

Dev. board

Curiosity PIC32 MZ EF

Compiler

NECTO Studio

MCU

PIC32MZ2048EFM100

This innovative product unlocks new possibilities in I2C connectivity, inspiring users to explore and unleash the full potential of 8-pin connections, fostering innovation and creativity in electronics projects.

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Hardware Overview

How does it work?

8-pin I2C Click is an adapter Click board™ that simplifies the connection of add-on boards to the mikroBUS™ socket. This Click board™ represents a small-size PCB that can be connected to the mikroBUS™ socket like any other Click board™, with a 2x4 female header placed on itself. Each header pin corresponds to a pin on the mikroBUS™ socket, such as I2C lines (SCL, SDA) with two jumpers for I2C lines pull-up function selection, 3V3 power supply, and ground. This Click board™ allows easy pin access and manipulation while always retaining a perfect connection

quality. Being compatible with Apple's MFI is the most important feature of the 8-pin I2C Click board™, which ensures its proper operation with additional Apple accessories. The name is a shortened version of the long-form Made for iPod, the original program that ultimately became MFI which refers to peripherals that work with Apple's iPod, iPad, and iPhone. 8-pin I2C Click communicates with MCU using the standard I2C 2-Wire interface. Lines of the mikroBUS™ to which this Click board™ is attached are shared through the top 8-pin female header, which mirrors

the pins of the connected mikroBUS™ socket. The 8-pin I2C Click also shares the 3V3 power rails, making it compatible with other power-compatible Click board™ and development systems. This Click board™ can only be operated with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used as a reference for further development.

8-pin-i2c-click-hardware-overview

Features overview

Development board

Curiosity PIC32 MZ EF development board is a fully integrated 32-bit development platform featuring the high-performance PIC32MZ EF Series (PIC32MZ2048EFM) that has a 2MB Flash, 512KB RAM, integrated FPU, Crypto accelerator, and excellent connectivity options. It includes an integrated programmer and debugger, requiring no additional hardware. Users can expand

functionality through MIKROE mikroBUS™ Click™ adapter boards, add Ethernet connectivity with the Microchip PHY daughter board, add WiFi connectivity capability using the Microchip expansions boards, and add audio input and output capability with Microchip audio daughter boards. These boards are fully integrated into PIC32’s powerful software framework, MPLAB Harmony,

which provides a flexible and modular interface to application development a rich set of inter-operable software stacks (TCP-IP, USB), and easy-to-use features. The Curiosity PIC32 MZ EF development board offers expansion capabilities making it an excellent choice for a rapid prototyping board in Connectivity, IOT, and general-purpose applications.

Curiosity PIC32MZ EF double side image

Microcontroller Overview

MCU Card / MCU

default

Architecture

PIC32

MCU Memory (KB)

2048

Silicon Vendor

Microchip

Pin count

100

RAM (Bytes)

524288

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
NC
NC
INT
NC
NC
TX
NC
NC
RX
I2C Clock
RPA14
SCL
I2C Data
RPA15
SDA
NC
NC
5V
Ground
GND
GND
1

Take a closer look

Click board™ Schematic

8-pin I2C Click Schematic schematic

Step by step

Project assembly

Curiosity PIC32MZ EF front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Curiosity PIC32 MZ EF as your development board.

Curiosity PIC32MZ EF front image hardware assembly
GNSS2 Click front image hardware assembly
Prog-cut hardware assembly
GNSS2 Click complete accessories setup image hardware assembly
Board mapper by product7 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
Curiosity PIC32 MZ EF 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

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 8-pin I2C Click driver.

Key functions:

  • c8pini2c_generic_write - Generic write function.

  • c8pini2c_generic_read - Generic read 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 8pinI2c Click example
 * 
 * # Description
 * This demo example reads temperature detected by Surface temp click board.
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init 
 * Initializes the driver and configures a Surface temp click board.
 * 
 * ## Application Task  
 * Reads the temperature detected by Surface temp click board and 
 * logs it on the USB UART each second.
 * 
 * @note
 * In order to run this example successfully, a Surface temp click board needs to be 
 * connected properly to an 8-pin I2C click board.
 * 
 * \author MikroE Team
 *
 */
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "c8pini2c.h"

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

static c8pini2c_t c8pini2c;
static log_t logger;

// Surface temp click - example
#define SURFACE_TEMP_DEVICE_SLAVE_ADDRESS 0x48
#define SURFACE_TEMP_REG_SOFT_RESET       0x2F
#define SURFACE_TEMP_REG_ID               0x0B
#define SURFACE_TEMP_REG_CONFIG           0x03
#define SURFACE_TEMP_REG_TEMP_MSB         0x00

// ------------------------------------------------------- ADDITIONAL FUNCTIONS

void surfacetemp_soft_reset (  )
{
    uint8_t tx_data;

    tx_data = SURFACE_TEMP_REG_SOFT_RESET;

    c8pini2c_generic_write ( &c8pini2c, SURFACE_TEMP_DEVICE_SLAVE_ADDRESS, 
                                        0, &tx_data, 1 );
}

uint8_t surfacetemp_setup (  )
{
    uint8_t tmp;

    surfacetemp_soft_reset( );
    Delay_100ms( );
    c8pini2c_generic_read( &c8pini2c, SURFACE_TEMP_DEVICE_SLAVE_ADDRESS, 
                                      SURFACE_TEMP_REG_ID, &tmp, 1 );

    if ( tmp != 0xCB )
    {
        return 1;
    }
    tmp = 0x93;
    c8pini2c_generic_write( &c8pini2c, SURFACE_TEMP_DEVICE_SLAVE_ADDRESS, 
                                       SURFACE_TEMP_REG_CONFIG, &tmp, 1 );

    return 0;
}

float surfacetemp_get_temperature (  )
{
    uint8_t rx_buff[ 2 ];
    int16_t temp;
    float temperature;

    c8pini2c_generic_read( &c8pini2c, SURFACE_TEMP_DEVICE_SLAVE_ADDRESS, 
                                      SURFACE_TEMP_REG_TEMP_MSB, &rx_buff[ 0 ], 2 );

    temp = rx_buff[ 0 ];
    temp <<= 8;
    temp |= rx_buff[ 1 ];
    temp &= 0xFFF8;

    temperature = (float)(temp);
    temperature *= 0.0078;

    return temperature;
}

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

void application_init ( void )
{
    log_cfg_t log_cfg;
    c8pini2c_cfg_t cfg;

    uint8_t status;

    /** 
     * 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.

    c8pini2c_cfg_setup( &cfg );
    C8PINI2C_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    c8pini2c_init( &c8pini2c, &cfg );

    status = surfacetemp_setup( );
    if ( status == 0 )
    {
        log_printf( &logger, "--- INIT DONE --- \r\n" );
    }
    else
    {
        log_printf( &logger, "--- INIT ERROR --- \r\n" );
        for( ; ; );
    }
}

void application_task ( void )
{
    float temperature;

    temperature = surfacetemp_get_temperature( );
    log_printf( &logger, "> Temperature : %.2f Celsius\r\n", temperature );
    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

Additional Support

Resources

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