ADT75 no-OS Example Project

See projects/adt75 (doxygen) for the Doxygen documentation.

The EVAL-ADT75 evaluation board allows designers to easily evaluate all features of the ADT75 temperature sensor. The ADT75 is a temperature monitoring device in an 8-lead MSOP and SOIC package, featuring a bandgap temperature sensor and a 12-bit ADC for digitizing temperature with a 0.0625°C resolution. It is compatible with LM75 and AD7416 registers, operates on a 2.7V to 5.5V supply, and typically consumes 200µA at 3.3V. The operating temperature range is -55°C to +125°C, with a shutdown mode reducing power consumption to 3µA. It includes address selection pins (A0, A1, A2) and an OS/ALERT pin for over- or under-temperature alerts, configurable in comparator or interrupt mode.

Applications

Isolated sensors
Environmental control systems
Computer thermal monitoring
Thermal protection
Industrial process control
Power-system monitors
Hand-held applications

Hardware Specifications

Power Supply Requirements

The ADT75 requires a power supply voltage ranging from 2.7V to 5.5V. For this specific project, the EVAL-ADT75 is powered by the 3.3V supply from the MAX32650EVKIT. It is recommended to use a 0.1µF ceramic capacitor between VDD and GND for decoupling to minimize power supply noise and ensure accurate readings.

Board Connector and Jumper Settings

Pin Description

Please see the following table for the pin assignments:

Name	Description
VDD	Connect to 3.3V or 5V supply
GND	Connect to Ground
SCL	Connect to I2C Clock (SCL)
SDA	Connect to I2C Data (SDA)
OS/ALERT	Overtemperature indicator (optional)
A0-A2	I2C address selection pins

No-OS Build Setup

Please see: No-OS Build Guide

No-OS Supported Examples

The initialization data used in the examples is taken out from: Project Common Data Path

The macros used in Common Data are defined in platform specific files found in: Project Platform Configuration Path

Basic Example

This is a simple example that initializes the ADT75 sensor, reads temperature data, and displays the readings continuously via UART.

In order to build the basic example make sure you have the following configuration in the Makefile

# Select the example you want to enable by choosing y for enabling and n for disabling
BASIC_EXAMPLE = y
IIO_EXAMPLE = n

IIO Example

This project is actually a IIOD demo for ADT75. The project launches a IIOD server on the board so that the user may connect to it via an IIO client.

Using IIO-Oscilloscope, the user can configure the device.

If you are not familiar with ADI IIO Application, please take a look at: IIO No-OS

If you are not familiar with ADI IIO-Oscilloscope Client, please take a look at: IIO Oscilloscope

The No-OS IIO Application together with the No-OS IIO ADT75 driver take care of all the back-end logic needed to setup the IIO server.

This example initializes the IIO device and calls the IIO app as shown in: IIO Example

In order to build the IIO project make sure you have the following configuration in the Makefile

# Select the example you want to enable by choosing y for enabling and n for disabling
BASIC_EXAMPLE = n
IIO_EXAMPLE = y

No-OS Supported Platforms

Maxim Platform

Used Hardware

Connections:

EVAL-ADT75 Pin	Function	MAX32650EVKIT Pin
SDA (Pin 1)	I2C Data (SDA)	I2C1_SDA
SCL (Pin 2)	I2C Clock (SCL)	I2C1_SCL
GND (Pin 4)	Ground	GND
VDD (Pin 8)	Power Supply	3V3

Build Command

# to delete current build
make reset PLATFORM=maxim TARGET=max32650
# to build the project
make PLATFORM=maxim TARGET=max32650
# to flash the code
make run PLATFORM=maxim TARGET=max32650