Magnetic Rotary 6 Click

NOTE: Rotary Magnetic Holder does not come in the same package as this Click board™, but you can find it in our shop.

How does it work?

Magnetic Rotary 6 Click is based on the AS5247U, a high-resolution dual rotary position sensor for fast absolute angle measurement over a full 360-degree range from ams AG. The core of the AS5247U represents a CMOS technology Hall-effect magnetic sensor that converts the magnetic field component perpendicular to the surface of the chip into a digital value. It supports high-speed applications up to 28krpm and allows a host MCU to read 14-bit absolute angle position data and to program non-volatile settings without a dedicated programmer. The AS5247U is also equipped with a Dynamic Angle Error Compensation block that corrects the calculated angle regarding latency by using a linear prediction calculation algorithm.

The AS5247U communicates with MCU using a standard SPI interface. The signals from its internal Hall sensors are amplified and filtered before their conversion by the ADC and then processed by the CORDIC block to compute the angle and magnitude of the magnetic field vector. The intensity of the magnetic field is used by the automatic gain control (AGC) to adjust the amplification level to compensate for temperature and magnetic field variations. This Click board™ also comes with onboard headers reserved for incremental and commutation signals of their respective A/B/I and U/V/W signals alongside embedded self-diagnostics. Incremental movements are indicated on a set of ABI signals with a maximum resolution of 16384 steps / 4096 pulses per revolution. The resolution of the ABI signal is programmable for 10 to 14 bits.

Brushless DC (BLDC) motors are also controllable through a standard UVW commutation interface with a programmable number of pole pairs from 1 to 7. At constant rotation speed, the latency time is internally compensated by the AS5247U, reducing the dynamic angle error at the SPI, ABI, and UVW outputs. The AS5047D also allows selection between a UVW output interface and a PWM-encoded interface on the W pin, which can be seen as an absolute angle position. A unique addition to this board is a position for a rotary magnet holder designed to be used alongside a magnetic rotary position sensor allowing fast prototyping and quick measurements during development.

This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. All jumpers must be on the same side, or the Click board™ may become unresponsive. This way, both 3.3V and 5V capable MCUs can 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.

Specifications

Pinout diagram

This table shows how the pinout on Magnetic Rotary 6 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
	NC	1	AN	PWM	16	CSB	External sync
	NC	2	RST	INT	15	NC
SPI Chip Select	CST	3	CS	RX	14	NC
SPI Clock	SCK	4	SCK	TX	13	NC
SPI Data OUT	SDO	5	MISO	SCL	12	NC
SPI Data IN	SDI	6	MOSI	SDA	11	NC
Power Supply	3.3V	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

Magnetic Rotary 6 Click electrical specifications

Software Support

We provide a library for the Magnetic Rotary 6 Click as well as a demo application (example), developed using Mikroe compilers. The demo can run on all the main Mikroe development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for Magnetic Rotary 6 Click driver.

Key functions

• magneticrotary6_write_register This function writes a desired data to the selected register of a desired sensor die by using SPI serial interface.

• magneticrotary6_get_angle This function reads the absolute position raw data of a desired sensor die and converts it to degrees (Angle).

• magneticrotary6_set_direction This function sets the rotation direction of a desired sensor die.

Example Description

This example demonstrates the use of Magnetic Rotary 6 Click board™ by reading and displaying the magnet’s angular position in degrees measured by the bottom and top sensor dies.

void application_task ( void ) 
 { 
     float angle; 
     if ( MAGNETICROTARY6_OK == magneticrotary6_get_angle ( &magneticrotary6, MAGNETICROTARY6_DIE_BOTTOM, &angle ) ) 
     { 
         log_printf( &logger, " Angle (bottom die): %.1f degreesrn", angle ); 
     } 
     if ( MAGNETICROTARY6_OK == magneticrotary6_get_angle ( &magneticrotary6, MAGNETICROTARY6_DIE_TOP, &angle ) ) 
     { 
         log_printf( &logger, " Angle (top die): %.1f degreesrnn", angle ); 
     } 
     Delay_ms ( 100 ); 
 }

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.MagneticRotary6

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. A UART terminal is available in all Mikroe compilers.

mikroSDK

This Click board™ is supported with mikroSDK – Mikroe Software Development Kit, which needs to be downloaded from the LibStock and installed for the compiler you are using to ensure proper operation of mikroSDK compliant Click board™ demo applications.

For more information about mikroSDK, visit the official page.