4 hall sensor with TLA2518 converter

Projects Networking, Protocols, and Devices
1

Hi everyone,

I am working on my master's thesis using an Arduino Uno, but I am experiencing some difficulties as I am not very experienced with it. Specifically, I have four Hall sensors connected to a TLA2518 converter (SPI), which is in turn connected to the Arduino Uno using the following pins:

  • SCL pin 13
  • SDI pin 12
  • SDO pin 11
  • CS pin 10

I have also connected VD to V5 and GND to GND.

I am facing an issue where the readings on the serial monitor are always displaying as zeros when i use a magnet.

I am not sure if my code is correct, or if there is somethong wrong.

#include <SPI.h>
#define CS 10

void setup() {
  // Initialize SPI communication
  SPI.begin();

  // Set the CS pin as an output
  pinMode(CS, OUTPUT);

  // Start serial communication
  Serial.begin(9600);
}

void loop() {
  // Select the first sensor
  digitalWrite(CS, LOW);

  // Send a command to read from the TLA2518
  SPI.transfer(0b00001111);

  // Read the data from the TLA2518
  int msb = SPI.transfer(0x00);
  int lsb = SPI.transfer(0x00);
  int data = (msb << 8) | lsb;

  // Deselect the TLA2518 converter
  digitalWrite(CS, HIGH);

  // Print the data to the serial monitor
  Serial.println("Sensor 1: " + String(data));

  // Select the second sensor
  digitalWrite(CS, LOW);

  // Send a command to read from the TLA2518
  SPI.transfer(0b00011111);

  // Read the data from the TLA2518
  msb = SPI.transfer(0x00);
  lsb = SPI.transfer(0x00);
  data = (msb << 8) | lsb;

  // Deselect the TLA2518 converter
  digitalWrite(CS, HIGH);

  // Print the data to the serial monitor
  Serial.println("Sensor 2: " + String(data));

  // Select the third sensor
  digitalWrite(CS, LOW);

  // Send a command to read from the TLA2518
  SPI.transfer(0b00101111);

  // Read the data from the TLA2518
  msb = SPI.transfer(0x00);
  lsb = SPI.transfer(0x00);
  data = (msb << 8) | lsb;

  // Deselect the TLA2518 converter
  digitalWrite(CS, HIGH);

  // Print the data to the serial monitor
  Serial.println("Sensor 3: " + String(data));

  // Select the fourth sensor
  digitalWrite(CS, LOW);

  // Send a command to read from the TLA2518
  SPI.transfer(0b00111111);

  // Read the data from the TLA2518
  msb = SPI.transfer(0x00);
  lsb = SPI.transfer(0x00);
  data = (msb << 8) | lsb;

  // Deselect the TLA2518 converter
  digitalWrite(CS, HIGH);

  // Print the data to the serial monitor
  Serial.println("Sensor 4: " + String(data));

  // Wait for a moment before sending another command
  delay(1000);
}

there are link for Converter and hallsensor :

Converter TLA2518 :

Hallsensor:
https://www.mouser.de/datasheet/2/187/HWSC_S_A0012826248_1-3073340.pdf

The question is: why am I not getting any reaction from my sensor at serialmonitor ?

2

Question:

Why do use an ADC to read a hal sensor ?

3

Did you write the source code?

A quick look at the data sheet suggests that you first have to configure the inputs, then initiate a conversion, then wait for the conversion to complete, then get the data.

A Google search for "Arduino TLA2518" gave this library GitHub - dlyckelid/IOExpander-TLA2518
I don't know if it's any good, but should give you some ideas.

4

this device output is from 1V to 4V, (w/o trigger).

1 Like
5

I don't have any source code for my project. I attempted to use a TLA2518 library, but there were always errors in the something and decided not to use it.

6

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