c3dhall9  2.0.0.0
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3D Hall 9 click

3D Hall 9 Click is a compact add-on board used to detect the strength of a magnetic field in all three dimensions. This board features the ALS31300, a 3D linear Hall-effect sensor with digital output and advanced low power management from Allegro Microsystems. The ALS31300 features an I2C interface, enabling it to be easily configured by MCU with the measurement data provided in digital format of 12-bits corresponding to the magnetic field measured in each X, Y, and Z axes.

click Product page


Click library

  • Author : Stefan Filipovic
  • Date : Nov 2021.
  • Type : I2C type

Software Support

We provide a library for the 3D Hall 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 3D Hall 9 Click driver.

Standard key functions :

Example key functions :

  • c3dhall9_write_register This function writes a desired data to the selected register by using I2C serial interface.
    err_t c3dhall9_write_register ( c3dhall9_t *ctx, uint8_t reg, uint32_t data_in );
  • c3dhall9_read_register This function reads a desired data from the selected register by using I2C serial interface.
    err_t c3dhall9_read_register ( c3dhall9_t *ctx, uint8_t reg, uint32_t *data_out );
  • c3dhall9_read_data This function reads new data which consists of X, Y, and Z axis values in Gauss, and temperature in Celsius. It also calculates the angles between all axes in Degrees based on the raw axes data read.
    err_t c3dhall9_read_data ( c3dhall9_t *ctx, c3dhall9_data_t *data_out );

Example Description

This example demonstrates the use of 3D Hall 9 click board by reading the magnetic

flux density from 3 axes as well as the angles between axes and the sensor temperature.

The demo application is composed of two sections :

Application Init

Initializes the driver and the click board.

void application_init ( void )
{
log_cfg_t log_cfg;
c3dhall9_cfg_t c3dhall9_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
c3dhall9_cfg_setup( &c3dhall9_cfg );
C3DHALL9_MAP_MIKROBUS( c3dhall9_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == c3dhall9_init( &c3dhall9, &c3dhall9_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( C3DHALL9_ERROR == c3dhall9_default_cfg ( &c3dhall9 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}

Application Task

Reads the new data from the sensor approximately every 300ms and displays the measurement values on the USB UART.

void application_task ( void )
{
c3dhall9_data_t sensor_data;
if ( C3DHALL9_OK == c3dhall9_read_data ( &c3dhall9, &sensor_data ) )
{
log_printf( &logger, " X-axis: %.1f Gauss\r\n", sensor_data.x_axis );
log_printf( &logger, " Y-axis: %.1f Gauss\r\n", sensor_data.y_axis );
log_printf( &logger, " Z-axis: %.1f Gauss\r\n", sensor_data.z_axis );
log_printf( &logger, " Angle XY: %.1f Degrees\r\n", sensor_data.angle_xy );
log_printf( &logger, " Angle XZ: %.1f Degrees\r\n", sensor_data.angle_xz );
log_printf( &logger, " Angle YZ: %.1f Degrees\r\n", sensor_data.angle_yz );
log_printf( &logger, " Temperature: %.2f Celsius\r\n\n", sensor_data.temperature );
Delay_ms ( 300 );
}
}

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.3DHall9

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. UART terminal is available in all MikroElektronika compilers.


C3DHALL9_MAP_MIKROBUS
#define C3DHALL9_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: c3dhall9.h:140
c3dhall9_default_cfg
err_t c3dhall9_default_cfg(c3dhall9_t *ctx)
3D Hall 9 default configuration function.
c3dhall9_data_t::temperature
float temperature
Definition: c3dhall9.h:209
c3dhall9_data_t::x_axis
float x_axis
Definition: c3dhall9.h:203
C3DHALL9_OK
@ C3DHALL9_OK
Definition: c3dhall9.h:192
c3dhall9_t
3D Hall 9 Click context object.
Definition: c3dhall9.h:154
c3dhall9_write_register
err_t c3dhall9_write_register(c3dhall9_t *ctx, uint8_t reg, uint32_t data_in)
3D Hall 9 I2C writing function.
c3dhall9_data_t::z_axis
float z_axis
Definition: c3dhall9.h:205
c3dhall9_data_t::angle_xy
float angle_xy
Definition: c3dhall9.h:206
application_task
void application_task(void)
Definition: main.c:65
c3dhall9_data_t::angle_yz
float angle_yz
Definition: c3dhall9.h:208
c3dhall9_cfg_setup
void c3dhall9_cfg_setup(c3dhall9_cfg_t *cfg)
3D Hall 9 configuration object setup function.
C3DHALL9_ERROR
@ C3DHALL9_ERROR
Definition: c3dhall9.h:193
c3dhall9_data_t::y_axis
float y_axis
Definition: c3dhall9.h:204
c3dhall9_data_t::angle_xz
float angle_xz
Definition: c3dhall9.h:207
c3dhall9_cfg_t
3D Hall 9 Click configuration object.
Definition: c3dhall9.h:174
c3dhall9_data_t
3D Hall 9 Click data object.
Definition: c3dhall9.h:202
c3dhall9_init
err_t c3dhall9_init(c3dhall9_t *ctx, c3dhall9_cfg_t *cfg)
3D Hall 9 initialization function.
application_init
void application_init(void)
Definition: main.c:29
c3dhall9_read_data
err_t c3dhall9_read_data(c3dhall9_t *ctx, c3dhall9_data_t *data_out)
3D Hall 9 read data function.
c3dhall9_read_register
err_t c3dhall9_read_register(c3dhall9_t *ctx, uint8_t reg, uint32_t *data_out)
3D Hall 9 I2C reading function.