ADS1118 Thermocouple BoosterPack

Overview

This guide will help you get started with the ADS1118 Thermocouple BoosterPack using your LaunchPad enabled in Energia. The ADS1118 is a precision analog-to-digital converter (ADC). It can perform up to 860 samples per second (SPS) and has an onboard programmable gain amplifier (PGA) that allows input ranges from m ±256 mV to ±6.144 V. The ADS1118 Booster Pack showcases a Type K Thermocouple. A thermocouple consists of two conductors of different materials that produce a voltage in the vicinity of the point where the two conductors are in contact. Type K is the most common general purpose thermocouple with a sensitivity of approximately 41 µV/°C. A type K thermocouple is inexpensive, and a wide variety of probes are available in the −200°C to +1250°C (–330°F to +2460°F) range. This library exposes this functionality and allows the user to interact with it and enable the ADS1118 Thermocouple in a variety of applications. You can visit the following link to buy and gather more information on the ADS1118 BoosterPack. http://www.ti.com/tool/430boost-ads1118. Click here to go download this library.

Hardware Configuration

In order to get started with our ADS1118 BoosterPack, simply connect the ADS1118 BoosterPack to the LaunchPad of your choice. Next, connect the thermocouple to your BoosterPack to the appropriate plug on your BoosterPack. Once everything is connected and any other BoosterPacks you want to interact with are stacked appropriately, plug your LaunchPad into your computer. This should provide power to the LCD screen and the backlight will light up. Now you are ready to start interacting with the ADS1118 BoosterPack!

Software Configuration

To get started with our ADS1118 BoosterPack, first you must open Energia. The first step is to include the ADS1118 Library.

  • #include <ADS1118.h>

Then next, we need to instantiate an instance of our ADS1118 Library. For example type the following before the setup or loop functions in Energia:

  • ADS1118 ADS;

Once an instance of the ADS1118 Library has been created, you can start using the functions detailed in the library. Below is an example program that will read the temperature from the ADS1118 in Fahrenheit and print it to a Serial port.

Example:

#include <ADS1118.h>

ADS1118 ADS;

void setup() {
        Serial.begin(9600); // starts serial comm at 9600 baud
	ADS.begin();
        noTone(2);       //ensures no tone coming from ADS BoosterPack
}

void loop() {
        //prints temp in farenheit every 100ms
        Serial.println(ADS.readFarenheit());
        delay(100);
}

 

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