30 min

Enable non-contact rotary measurements in harsh environments using AS5601 and PIC18F4680

Precision positioning: Elevate your control with magnetic sensing

Magneto 8 Click with EasyPIC v7a

Published Nov 01, 2023

Click board™

Magneto 8 Click

Development board

EasyPIC v7a


NECTO Studio



Upgrade your solution capabilities by integrating magnetic position sensing, opening up possibilities for innovative applications like smart locks, thermostats, and more, with reliable position feedback



Hardware Overview

How does it work?

Magneto 8 Click is based on the AS5601, 12-bit programmable contactless encoder IC from AMS-AG. The AS5601 is a Hall-based rotary magnetic position encoder that converts the magnetic field component vertical to the surface of the chip into a voltage, which is used to produce incremental A/B outputs and absolute position indication. The analog signals from the Hall sensor are first amplified and filtered (before being converted by the ADC into binary data). Then, they are processed by the CORDIC block to compute the angle and magnitude of the magnetic field vector. The internal logic uses the angle values provided by the CORDIC algorithm to generate the incremental quadrature signals A and B. Additionally, the AS5601 implements a pushbutton detection function that indicates sudden

airgap changes between the AS5601 and magnet and drives the PUSH output pin high when the AS5601 detects a fast increase of the magnetic field and vice versa. The AS5601 communicates with MCU using the standard I2C 2-Wire interface with a maximum SCL frequency of 1 MHz. The I2C communication interface supports several different modes. In addition to the modes such as Standard, Fast, and Fast-Plus mode, there are three additional modes: Random/Sequential read, Byte/Page write, and Automatic increment relating to the ANGLE register. The AS5601 can be powered from a 5V supply using the on-chip LDO regulator, or it can be powered directly from a 3.3V supply. The selection can be done by positioning SMD jumpers labeled as VCC SEL to an appropriate position. In this case, there are

two voltage selection jumpers because the power pins of the AS5601 require a different configuration in the case of 3.3V and 5V power supply. In 5V operation, the second power pin must be connected to the ground via a decoupling capacitor C2. Otherwise, in 3.3V operation, the two pins must be tied together. Note that all the jumpers must be placed on the same side, or the Click board™ may become unresponsive. 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.

Magneto 8 Click top side image
Magneto 8 Click bottom side image

Features overview

Development board

EasyPIC v7a is the seventh generation of PIC development boards specially designed for the needs of rapid development of embedded applications. It supports a wide range of 8-bit PIC microcontrollers from Microchip and has a broad set of unique functions, such as the first-ever embedded debugger/programmer over USB-C. 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 v7a allows you to connect accessory boards, sensors, and custom electronics more efficiently than ever. Each part of the EasyPIC v7a development board

contains the components necessary for the most efficient operation of the same board. In addition to the advanced integrated CODEGRIP programmer/debugger module, which offers many valuable programming/debugging options and seamless integration with the Mikroe software environment, the board also includes a clean and regulated power supply module 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-C (USB-C) 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 v7a 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 v7a double side image

Microcontroller Overview

MCU Card / MCU




MCU Memory (KB)


Silicon Vendor


Pin count


RAM (Bytes)


Used MCU Pins

mikroBUS™ mapper

Incremental Signal A
Incremental Signal B
Power Supply
Pushbutton Output
I2C Clock
I2C Data
Power Supply

Take a closer look


Magneto 8 Click Schematic schematic

Step by step

Project assembly

EasyPIC v7a front image hardware assembly

Start by selecting your development board and Click board™. Begin with the EasyPIC v7a as your development board.

EasyPIC v7a front image hardware assembly
Buck 22 Click front image hardware assembly
MCU DIP 40 hardware assembly
EasyPIC v7a 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

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 Magneto 8 Click driver.

Key functions:

  • magneto8_get_magnitude - Gets magnitude data

  • magneto8_get_angle_data - Gets Angle data

  • magneto8_psh_pin_state - Gets PSH pin state

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 Magneto8 Click example
 * # Description
 * This example demonstrates the use of Magneto 8 Click board.
 * The demo application is composed of two sections :
 * ## Application Init 
 * Initializes the driver and applies the click default configuration.
 * ## Application Task  
 * Reads angle and magnitude data and displays it on the USB UART every 500ms.
 * \author MikroE Team
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "magneto8.h"

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

static magneto8_t magneto8;
static log_t logger;

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

void application_init ( void )
    log_cfg_t log_cfg;
    magneto8_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.

    magneto8_cfg_setup( &cfg );
    magneto8_init( &magneto8, &cfg );

    magneto8_default_cfg( &magneto8 );
    log_printf( &logger, "--- Configuration done ---- \r\n" );
    Delay_ms( 500 );

void application_task ( void )
    uint16_t angle;
    uint16_t mag;

    mag  = magneto8_get_magnitude( &magneto8 );
    log_printf( &logger, "Magnitude: %d \r\n", mag );
    angle = magneto8_get_angle_data( &magneto8 );
    log_printf( &logger, "Angle : %d \r\n", angle );

    log_printf( &logger, "---------------------- \r\n" );
    Delay_ms( 500 );

void main ( void )
    application_init( );

    for ( ; ; )
        application_task( );

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

Additional Support