Transform magnetic fields into valuable 3D insights with TLI493D-W2BW and STM32L031C6
Your precision partner in magnetic sensing
Published Sep 27, 2023
Click board™
3D Hall 8 Click
Dev Board
Fusion for STM32 v8
Compiler
NECTO Studio
MCU
STM32L031C6
Unlock the full potential of 3D magnetic sensing with our cutting-edge technology, revolutionizing industries and enhancing everyday lifestyles
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Hardware Overview
How does it work?
3D Hall 8 Click is based on the TLI493D-W2BW, a low-power 3D Hall sensor with an I2C interface and a Wake-Up feature from Infineon. It consists of three central functional units containing the power mode control system, a low-power oscillator, basic biasing, undervoltage detection, and a fast oscillator. Besides, it has also implemented the sensing unit, which contains the HALL biasing, HALL probes with multiplexers and successive tracking ADC, and a temperature sensor. This sensor offers several use cases, including innovative human-machine interfaces in the form of industrial and consumer joysticks and precise position control in robotics. The power mode control provides the power distribution, which manages the Start-Up behavior in the TLI493D-W2BW, a power-on reset function, and a specialized low-power oscillator, the clock source.
The sensing unit measures the magnetic field in the X, Y, and Z directions. Each X-, Y-, and Z-Hall probe is connected sequentially to a multiplexer, connected to an analog-to-digital converter. Optional, the temperature measurement feature, activated in the default state, can be determined after the three Hall channels. 3D Hall 8 Click communicates with MCU using the standard I2C 2-Wire interface to read data and configure settings, supporting Fast Mode operation with a clock frequency up to 1MHz. The Wake-Up function has an upper and lower comparison threshold for each of the three magnetic channels (X/Y/Z). Each component of the applied field is compared to the lower and upper thresholds. If one of the results is above or below these thresholds, an interrupt is generated called a Wake-Up function. The Wake-Up mode allows the
sensor to continue making magnetic field measurements while the MCU is in the power-down state, which means the microcontroller will only consume power and access the sensor if relevant measurement data is available. An interrupt pin signals a finished measurement cycle but can also be used for I2C clock stretching. In this case, the INT pin must be connected to the SCL pin, which can be done by populating the jumper labeled JP1. This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. Also, it comes equipped with a library containing functions and an example code that can be used as a reference for further development.
Features overview
Development board
Fusion for STM32 v8 is a development board specially designed for the needs of rapid development of embedded applications. It supports a wide range of microcontrollers, such as different 32-bit ARM® Cortex®-M based MCUs from STMicroelectronics, regardless of their number of pins, and a broad set of unique functions, such as the first-ever embedded debugger/programmer over WiFi. The development board is well organized and designed so that the end-user has all the necessary elements, such as switches, buttons, indicators, connectors, and others, in one place. Thanks to innovative manufacturing technology, Fusion for STM32 v8 provides a fluid and immersive working experience, allowing
access anywhere and under any circumstances at any time. Each part of the Fusion for STM32 v8 development board contains the components necessary for the most efficient operation of the same board. An advanced integrated CODEGRIP programmer/debugger module offers many valuable programming/debugging options, including support for JTAG, SWD, and SWO Trace (Single Wire Output)), and seamless integration with the Mikroe software environment. Besides, it also includes a clean and regulated power supply module for the development board. It can use a wide range of external power sources, including a battery, an external 12V power supply, and a power source via the USB Type-C (USB-C) connector.
Communication options such as USB-UART, USB HOST/DEVICE, CAN (on the MCU card, if supported), and Ethernet is also included. In addition, it also has the well-established mikroBUS™ standard, a standardized socket for the MCU card (SiBRAIN standard), and two display options for the TFT board line of products and character-based LCD. Fusion for STM32 v8 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.
Microcontroller Overview
MCU Card / MCU
Type
8th Generation
Architecture
ARM Cortex-M0
MCU Memory (KB)
32
Silicon Vendor
STMicroelectronics
Pin count
48
RAM (Bytes)
8192
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Fusion for STM32 v8 as your development board.
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.
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.
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".
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.
Software Support
Library Description
This library contains API for 3D Hall 8 Click driver.
Key functions:
c3dhall8_generic_write- 3D Hall 8 I2C writing functionc3dhall8_read_sensor_data- Reading sensor data functionc3dhall8_get_xyz_magnetic_matching- Calculating magnetic matching
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 main.c
* @brief 3DHall8 Click example
*
* # Description
* This application shows capability of 3D Hall 8 Click board.
* It configures device and reads sensor data. Sensor is capeable
* of reading magnetic flux density from 3 axes and temperature.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initialization of device communication and application log
* and configures device.
*
* ## Application Task
* Reads data from the device and logs it in span of 500ms.
*
* @author Luka Filipovic
*
*/
#include "board.h"
#include "log.h"
#include "c3dhall8.h"
static c3dhall8_t c3dhall8;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
c3dhall8_cfg_t c3dhall8_cfg; /**< Click config object. */
uint8_t rx_data;
/**
* 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.
c3dhall8_cfg_setup( &c3dhall8_cfg );
C3DHALL8_MAP_MIKROBUS( c3dhall8_cfg, MIKROBUS_1 );
err_t init_flag = c3dhall8_init( &c3dhall8, &c3dhall8_cfg );
if ( init_flag == I2C_MASTER_ERROR )
{
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
log_printf( &logger," > Setting configuration...\r\n" );
c3dhall8_default_cfg ( &c3dhall8 );
log_info( &logger, " Application Task " );
log_printf( &logger, "**************************************\r\n" );
Delay_ms( 1000 );
}
void application_task ( void )
{
c3dhall8_data_t sens_data;
c3dhall8_read_sensor_data( &c3dhall8, &sens_data );
log_printf( &logger, "> X[mT]: %.2f\r\n> Y[mT]: %.2f\r\n> Z[mT]: %.2f \r\n> Temperature[C]: %.2f\r\n",
sens_data.x_axis, sens_data.y_axis, sens_data.z_axis, sens_data.temperature );
float magnetic_match = c3dhall8_get_xyz_magnetic_matching( &c3dhall8, sens_data );
log_printf( &logger, "> XYZ magnetic matching: %.2f\r\n", magnetic_match );
log_printf( &logger, "**************************************\r\n" );
Delay_ms( 500 );
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
