Beginner
10 min

Experience motion sensing excellence with RPI-1035 and PIC18F57Q43

Tilt to perfection

Tilt Click with Curiosity Nano with PIC18F57Q43

Published Feb 13, 2024

Click board™

Tilt Click

Dev Board

Curiosity Nano with PIC18F57Q43

Compiler

NECTO Studio

MCU

PIC18F57Q43

Embrace precise tilt sensing by integrating a tilt sensor and unlock new dimensions of control and accuracy – take the next step today!

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Hardware Overview

How does it work?

Tilt Click is based on the RPI-1035, a four-directional optical tilt sensor from Rohm Semiconductor, capable of sensing a change in orientation in four different directions: forward, back, left, or right. Compared to mechanical solutions, this optical direction detector is less prone to noise caused by vibrations. Also, the RPI-1035 is less influenced by magnetic disturbances than magnetic-based direction detectors. Based on various quality features, this Click board™ is ideal in cases where it is only necessary to detect movement direction, avoiding using a much more

expensive accelerometer. The operation of the RPI-1035 is straightforward. Inside the sensor is an infrared LED, which communicates with two photosensitive receivers through a reflective surface. Between these components and the reflective surface is a cover that, depending on the movement of the component, can cover the IR sensor or the receivers. Depending on the detected direction, this sensor forwards information to the host MCU through the two mikroBUS™ lines, VO1 and VO2, routed to the PWM and INT pins of the mikroBUS™ socket. Also,

in addition to digital information, this board has two red LEDs providing visual feedback from the sensor. This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the PWR SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to 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.

Tilt Click hardware overview image

Features overview

Development board

PIC18F57Q43 Curiosity Nano evaluation kit is a cutting-edge hardware platform designed to evaluate microcontrollers within the PIC18-Q43 family. Central to its design is the inclusion of the powerful PIC18F57Q43 microcontroller (MCU), offering advanced functionalities and robust performance. Key features of this evaluation kit include a yellow user LED and a responsive

mechanical user switch, providing seamless interaction and testing. The provision for a 32.768kHz crystal footprint ensures precision timing capabilities. With an onboard debugger boasting a green power and status LED, programming and debugging become intuitive and efficient. Further enhancing its utility is the Virtual serial port (CDC) and a debug GPIO channel (DGI

GPIO), offering extensive connectivity options. Powered via USB, this kit boasts an adjustable target voltage feature facilitated by the MIC5353 LDO regulator, ensuring stable operation with an output voltage ranging from 1.8V to 5.1V, with a maximum output current of 500mA, subject to ambient temperature and voltage constraints.

PIC18F57Q43 Curiosity Nano double side image

Microcontroller Overview

MCU Card / MCU

default

Architecture

PIC

MCU Memory (KB)

128

Silicon Vendor

Microchip

Pin count

48

RAM (Bytes)

8196

You complete me!

Accessories

Curiosity Nano Base for Click boards is a versatile hardware extension platform created to streamline the integration between Curiosity Nano kits and extension boards, tailored explicitly for the mikroBUS™-standardized Click boards and Xplained Pro extension boards. This innovative base board (shield) offers seamless connectivity and expansion possibilities, simplifying experimentation and development. Key features include USB power compatibility from the Curiosity Nano kit, alongside an alternative external power input option for enhanced flexibility. The onboard Li-Ion/LiPo charger and management circuit ensure smooth operation for battery-powered applications, simplifying usage and management. Moreover, the base incorporates a fixed 3.3V PSU dedicated to target and mikroBUS™ power rails, alongside a fixed 5.0V boost converter catering to 5V power rails of mikroBUS™ sockets, providing stable power delivery for various connected devices.

Curiosity Nano Base for Click boards 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
Output Signal 1
PB0
PWM
Output Signal 2
PA6
INT
NC
NC
TX
NC
NC
RX
NC
NC
SCL
NC
NC
SDA
Power Supply
5V
5V
Ground
GND
GND
1

Take a closer look

Schematic

Tilt Click Schematic schematic

Step by step

Project assembly

Curiosity Nano Base for Click boards front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Curiosity Nano with PIC18F57Q43 as your development board.

Curiosity Nano Base for Click boards front image hardware assembly
Barometer 13 Click front image hardware assembly
PIC18F57Q43 Curiosity Nano front image hardware assembly
Prog-cut hardware assembly
Curiosity Nano with PICXXX 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
PIC18F57Q43 Curiosity 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 Tilt Click driver.

Key functions:

  • tilt_direction - Check the tilt movement's direction 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
 * \brief Tilt Click example
 *
 * # Description
 * This is a example which demonstrates the use of Tilt Click board.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Configuring clicks and log objects.
 *
 * ## Application Task
 * Detect the movement's direction
 * of RPI-1035 Surface Mount Type 4-Direction Detector on Tilt click board.
 * Results are being sent to the Usart Terminal where you can track their changes.
 * All data logs on usb uart when the movement's direction is changed.
 *
 * \author MikroE Team
 *
 */
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "tilt.h"

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

static tilt_t tilt;
static log_t logger;

static uint8_t tilt_direction_new;
static uint8_t tilt_direction_old;

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


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

void application_init ( void )
{
    log_cfg_t log_cfg;
    tilt_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_printf(&logger, "---- Application Init ----\r\n");

    //  Click initialization.

    tilt_cfg_setup( &cfg );
    TILT_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    tilt_init( &tilt, &cfg );

    tilt_direction_old = 0;

    log_printf(&logger, "-------------\r\n");
    log_printf(&logger, " Tilt  Click \r\n");
    log_printf(&logger, "-------------\r\n");
    Delay_ms( 100 );
}

void application_task ( void )
{
    tilt_direction_new = tilt_direction( &tilt );

    if ( tilt_direction_old != tilt_direction_new )
    {
        if ( tilt_direction_new == TILT_LEFT_DETECTION )
        {
            log_printf(&logger, "    LEFT     \r\n");
        }

        if ( tilt_direction_new == TILT_RIGHT_DETECTION )
        {
            log_printf(&logger, "    RIGHT    \r\n");
        }

        if ( tilt_direction_new == TILT_UP_DETECTION )
        {
            log_printf(&logger, "     UP      \r\n");
        }

        if ( tilt_direction_new == TILT_DOWN_DETECTION )
        {
            log_printf(&logger, "    DOWN     \r\n");
        }

        tilt_direction_old = tilt_direction_new;
        log_printf(&logger, "-------------\r\n");
    }
}

void main ( void )
{
    application_init( );

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


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

Additional Support

Resources

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