Switch between two modes or states easily with D2HW-A221D and PIC32MZ1024EFH064

Unlocking versatility: Microswitch that speaks both ways

Published Oct 17, 2023

Click board™

Tamper 2 Click

Dev. board

PIC32MZ clicker

Compiler

NECTO Studio

MCU

PIC32MZ1024EFH064

Explore how this innovative microswitch design can enhance your device's functionality, delivering signals in both pressed and released positions

Hardware Overview

How does it work?

Tamper 2 Click is based on the D2HW-A221D, a microswitch from Omron, specifically positioned on the board so it is easily accessible for interacting with various objects that could press the lever, activating the microswitch that way. The microswitch is actuated by applying very little physical force, using a tipping-point mechanism which results in fast and reliable snap-in action. It also has both NC and NO contacts routed to the

mikroBUS™ so both states of the switch can be detected. Both lines are equipped with the RC filters, which serve as debouncing elements for the switch and also to pull down the lines when they are left afloat. This way, the contact bouncing is reduced even further, resulting in an accurate detection of the switching event. The switch itself is very endurable and its rated up to 42VDC / 0.5A, also can endure a very high number of

switching cycles – up to 1000000. 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

PIC32MZ Clicker 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 PIC32MZ microcontroller with FPU from Microchip, a USB connector, LED indicators, buttons, a mikroProg connector, and a header for interfacing with external electronics. Thanks to its compact design with clear and easy-recognizable silkscreen markings, it provides a fluid and immersive working experience, allowing access anywhere and under

any circumstances. Each part of the PIC32MZ Clicker development kit contains the components necessary for the most efficient operation of the same board. In addition to the possibility of choosing the PIC32MZ Clicker programming method, using USB HID mikroBootloader, or through an external mikroProg connector for PIC, dsPIC, or PIC32 programmer, the Clicker board also includes a clean and regulated power supply module for the development kit. The USB Micro-B connection can provide up to 500mA of current, which is more than enough to operate all onboard

and additional modules. All communication methods that mikroBUS™ itself supports are on this board, including the well-established mikroBUS™ socket, reset button, and several buttons and LED indicators. PIC32MZ Clicker 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

PIC32

MCU Memory (KB)

1024

Silicon Vendor

Microchip

Pin count

RAM (Bytes)

524288

Used MCU Pins

mikroBUS™ mapper

Normally Closed

RE4

RST

SCK

MISO

MOSI

Power Supply

3.3V

Ground

GND

PWM

Normally Open

RB5

INT

SCL

SDA

Power Supply

Ground

GND

Take a closer look

Click board™ Schematic

Step by step

Project assembly

PIC32MZ clicker front image hardware assembly

Start by selecting your development board and Click board™. Begin with the PIC32MZ clicker as your development board.

GNSS2 Click front image hardware assembly

Micro B Connector Clicker Access - upright/background hardware assembly

Flip&Click PIC32MZ MCU step hardware assembly

Necto No Display image step 8 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 Tamper 2 Click driver.

Key functions:

tamper2_get_on_state - Switch ON detect
tamper2_get_off_state - Switch OFF detect

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 Tamper 2 Click example
 * 
 * # Description
 * This application sets switch on ON or OFF.
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init 
 * Sends HAL pointers
 * 
 * ## Application Task  
 * Detects whether the state of switch on Tamper 2 click is ON or OFF.
 * 
 * \author MikroE Team
 *
 */
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "tamper2.h"

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

static tamper2_t tamper2;
static log_t logger;

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

void application_init ( void )
{
    log_cfg_t log_cfg;
    tamper2_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.

    tamper2_cfg_setup( &cfg );
    TAMPER2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    tamper2_init( &tamper2, &cfg );
}

void application_task ( )
{
    uint8_t on_state;
    uint8_t off_state;

    on_state = tamper2_get_on_state( &tamper2 );
    off_state = tamper2_get_off_state( &tamper2 );

    if ( on_state == 1 )
    {
        log_printf( &logger, "Tamper 2 click is in ON state.\r\n" );
		
    }

    if ( off_state == 1 )
    {
       log_printf( &logger, "Tamper 2 click is in OFF state.\r\n" );
		
    }

    Delay_ms( 200 );
}

void main ( void )
{
    application_init( );

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


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