Intermediate
30 min

Set, track, and achieve your wellness milestones easily with STP201M and PIC18LF45K80

Step by step to success: Pedometer magic in your hand

Pedometer Click with EasyPIC v7

Published Nov 01, 2023

Click board™

Pedometer Click

Dev Board

EasyPIC v7

Compiler

NECTO Studio

MCU

PIC18LF45K80

Our pedometer is your reliable companion for tracking daily steps, empowering you to achieve your fitness goals with precision

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Hardware Overview

How does it work?

Pedometer Click is based on the STP201M, a 3D pedometer module with an IC chipset from NiceRF. The module itself is designed for wrist pedometer products, like the pedometer bracelet or watch for example. The end user doesn’t have to worry about doing any calculations on their own, or worry about what the algorithm for step detection is doing, since the INT pins output is already a measurement of the steps that were taken. Specifically, a MEMS sensor. Micro-electro-mechanical system sensors, abbreviated to MEMS, are made out of very small components, with their size usually ranging from 1 to 100 micrometers. These account for the sensor being very small and therefore it having low energy consumption and

also not requiring a lot of space. This particular sensor is a 3D one. The three axes it utilizes, allow for precise measurements of any movement and the direction its taking. The three axes system, along with the MCUs meticulous algorithm, make it significantly less likely to make any false-positive counts (ex. tying up shoes). The MCU has two distinguished modes. The first one of them is the operational mode. The MCU is designed to go into the operational mode whenever it senses some activity. However, if there is no discernible movement over the course of 20 seconds, it goes into the sleep mode. This mode is characterized by the very low energy consumption of only 5 μA max. The STP201M modules communication is

somewhat different from the standard I2C protocol. Since our libraries do not support it, the user has the capability of changing the code of the main MCU in order to fit the protocol of the module and thus change any preprogramed settings. Since the modules maximum operatin voltage is 3.6V, the Pedometer click uses the 3.3V rail for power supply. The other pins it utilizes are the, before mentioned, Interrupt pin, and the I2C Clock and Data pins. This click also has a Power LED indicator. This Click Board™ is designed to be operated only with 3.3V logic level. A proper logic voltage level conversion should be performed before the Click board™ is used with MCUs with logic levels of 5V.

Pedometer Click top side image
Pedometer Click bottom side image

Features overview

Development board

EasyPIC v7 is the seventh generation of PIC development boards specially designed to develop embedded applications rapidly. It supports a wide range of 8-bit PIC microcontrollers from Microchip and has 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 in one place, such as switches, buttons, indicators, connectors, and others. With four different connectors for each port, EasyPIC v7 allows you to connect accessory boards, sensors, and custom electronics more efficiently than ever. Each part of

the EasyPIC 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 various external power sources, including an external 12V power supply, 7-23V AC or 9-32V DC via DC connector/screw terminals, and a power source via the USB Type-B (USB-B) connector. Communication options such as

USB-UART and RS-232 are also included, alongside the well-established mikroBUS™ standard, three display options (7-segment, graphical, and character-based LCD), and several different DIP sockets. These sockets cover a wide range of 8-bit PIC MCUs, from PIC10F, PIC12F, PIC16F, PIC16Enh, PIC18F, PIC18FJ, and PIC18FK families. EasyPIC 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 v7 horizontal image

Microcontroller Overview

MCU Card / MCU

default

Architecture

PIC

MCU Memory (KB)

32

Silicon Vendor

Microchip

Pin count

40

RAM (Bytes)

3648

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
Interrupt
RB0
INT
NC
NC
TX
NC
NC
RX
I2C Clock
RC3
SCL
I2C Data
RC4
SDA
NC
NC
5V
Ground
GND
GND
1

Take a closer look

Click board™ Schematic

Pedometer Click Schematic schematic

Step by step

Project assembly

EasyPIC v7 front image hardware assembly

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

EasyPIC v7 front image hardware assembly
Buck 22 Click front image hardware assembly
MCU DIP 40 hardware assembly
EasyPIC v7 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
Necto DIP image step 7 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

This Click board can be interfaced and monitored in two ways:

  • Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.

Software Support

Library Description

This library contains API for Pedometer Click driver.

Key functions:

  • pedometer_get_interrupt_state - Functions for get Interrupt state on the INT pin

  • pedometer_get_step_counter - Functions for get step counter

  • pedometer_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 Pedometer Click example
 * 
 * # Description
 * This application detected steps.
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init 
 * Initializes driver init and sets step counter on 0.
 * 
 * ## Application Task  
 * It checks if a new step is detected, if detected new step - 
 * reads the current number of steps made and logs data to the USBUART.
 * 
 * \author MikroE Team
 *
 */
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "pedometer.h"

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

static pedometer_t pedometer;
static log_t logger;

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

void application_init ( void )
{
    log_cfg_t log_cfg;
    pedometer_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.

    pedometer_cfg_setup( &cfg );
    PEDOMETER_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    pedometer_init( &pedometer, &cfg );
}

void application_task ( void )
{
    //  Task implementation.

    uint8_t new_step;
    uint32_t s_counter;
    char demoText[ 50 ];
    
    new_step = pedometer_process( &pedometer );

    if ( new_step == PEDOMETER_NEW_STEP_DETECTED )
    {
        s_counter = pedometer_get_step_counter( &pedometer );
        log_printf( &logger, " Step Counter : %d \r\n ", s_counter );
       
        Delay_ms( 50 );
    }

}

void main ( void )
{
    application_init( );

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


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

Additional Support

Resources

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