Magneto 9 Click

How does it work?

Magneto 9 Click as its foundation uses the A1359, a one-time programmable, dual tracking output, linear Hall-effect sensor from Allegro MicroSystems. It provides a dual analog/PWM output, where the PWM output tracks the analog output to within a +/-3% mismatch. It comes with factory-programmed output polarity; in this case, a forward polarity meaning that output voltage increases with increasing positive (south) applied magnetic field. The A1359 is targeted at the automotive market with end applications to include electronic power steering (torque sensing), transmission component position, brake and clutch cylinder position, and various other industrial applications.

The analog output signal of the A1359 can be converted to a digital value using MCP3221, a successive approximation A/D converter with a 12-bit resolution from Microchip, using a 2-wire I2C compatible interface, or can be sent directly to an analog pin of the mikroBUS™ socket labeled as AN. Selection can be performed by onboard SMD jumper labeled as AD SEL to an appropriate position marked as AN and ADC.

The MCP3221 provides one single-ended input with low power consumption, a low maximum conversion current, and a Standby current of 250μA and 1μA, respectively. Data can be transferred at rates of up to 100kbit/s in the Standard and 400kbit/s in the Fast Mode. Also, maximum sample rates of 22.3kSPS with the MCP3221 are possible in a Continuous-Conversion Mode with a clock rate of 400kHz.

This Click board™ operates only with a 5V logic voltage level. The board must perform appropriate logic voltage level conversion before use with MCUs with different logic levels. However, the Click board™ comes equipped with a library containing 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 Magneto 9 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
Analog Signal	AN	1	AN	PWM	16	PWM	PWM Signal
	NC	2	RST	INT	15	NC
	NC	3	CS	RX	14	NC
	NC	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	SCL	I2C Clock
	NC	6	MOSI	SDA	11	SDA	I2C Data
	NC	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

Magneto 9 Click electrical specifications

Software Support

We provide a library for the Magneto 9 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

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

Library Description

This library contains API for Magneto 9 Click driver.

Key functions:

• magneto9_cfg_setup – Config Object Initialization function.
• magneto9_init – Initialization function.

Examples description

This example demonstrates the use of Magneto 9 Click board™.

void application_task ( void )
{
    float voltage = 0;
    
    if ( MAGNETO9_OK == magneto9_read_adc_voltage ( &magneto9, &voltage ) )
    {
        float field_strength = MAGNETO9_VOLTAGE_TO_FIELD_STRENGTH ( voltage );
        log_printf( &logger, " ADC Voltage : %.3f Vrn", voltage );
        log_printf( &logger, " Magnetic field strength : %.3f mTrn", field_strength );
        if ( field_strength < 0 )
        {
            log_printf( &logger, " The North Pole magnetic field prevails.rnn" );
        }
        else
        {
            log_printf( &logger, " The South Pole magnetic field prevails.rnn" );
        }
    }
    Delay_ms( 1000 );
}

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

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Magneto9

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. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.

mikroSDK

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

For more information about mikroSDK, visit the official page.