The TMAG5170 high-precision linear 3D Hall-effect sensor communicates using a serial peripheral interface (SPI) to allow for device configuration, control, and data retrieval. To interface the TMAG5170 device with a microcontroller (MCU), the firmware or software engineer needs to know how to correctly configure their MCU's serial peripheral, sequence the serial commands, and control the SPI timing of command bytes to the sensor. To assist in expediting this process, this example code is intended to show how to initialize and communicate with the TMAG5170 at a high-level.

There are three modules included in this example code:

1. TMAG5170

   Description: High-level functions for communicating with and using the functions of the TMAG5170.

   Files: tmag5170.h, tmag5170.c

2. Hardware Abstraction Layer (HAL)

   Description: The HAL provides processor specific functions called by the TMAG5170 module.

   Files: hal.h, hal.c

   IMPORTANT: This module will need to be modified to work with your hardware!

Reference the tmag5170.c file while writing your own code for examples of how to read/write registers and implement the different capabilities of the sensor...

OR

Copy and paste the example code into your project, and update the files as needed to get access to the provided APIs...

1. Copy the TMAG5170 and HAL module files into your firmware project.

2. Add library references in hal.h to your processor-specific library file(s).

   //****************************************************************************
   //
   // Insert processor specific header file(s) here
   //
   //****************************************************************************"
   
   /*  --- TODO: INSERT YOUR CODE HERE --- */
   #include "ti/devices/msp432e4/driverlib/driverlib.h"

3. Edit all of the function implementations inside of hal.c to provide the specified functionality with your processor and processor-specific library APIs.

   //*****************************************************************************
   //
   //! Configures the MCU's SPI peripheral, for interfacing with the TMAG5170.
   //!
   //! \fn void InitSPI(void)
   //!
   //! \return None.
   //
   //*****************************************************************************
   void InitSPI(void)
   {
   	/* --- INSERT YOUR CODE HERE ---
   	* NOTE: The TMAG5170 operates in SPI mode 1 (CPOL = 0, CPHA = 1).
   	*/

   NOTE 1: The hal.c functions are called from within tmag5170.c to interface with the hardware. The hardware functionality is kept in a separate module to allow the TMAG5170 module to remain portable.

   NOTE 2: Provided code examples in hal.c functions utilize the TI SimpleLink SDK and allow for quick integration with TI SimpleLink MCUs.

4. Include a reference to hal.h somewhere in your program and call the InitTMAG5170() function to initialize the MCU peripherals connected to the TMAG5170.

5. Include a reference to tmag5170.h in your application (from main.c or wherever sensor communication is handled). You should now be able to begin calling the TMAG5170 module functions in your code.

DISCLAIMER: This code was tested on an MSP432E401Y 32-bit ARM® Cortex®-M4F based MCU using TI Code Composer Studio's 20.2.6.LTS ARM compiler. This code is provided as example to aid in the creation of your own software implementation and should not be considered to be fully verified and production ready. This example code was written for readability and has not been optimized for performance.

For questions or issues, visit the TI E2E Forums.

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