AD74414H no-OS Project

Supported Evaluation Boards

EVAL-AD74414H

Overview

The AD74414H is a quad-channel, software-configurable device designed for robust industrial control applications. It offers versatile analog and digital I/O capabilities for measuring voltage, current, RTD, and thermocouples while incorporating a 16-bit DAC and a 24-bit sigma-delta ADC with optional 50Hz/60Hz rejection. Each channel features an integrated HART modem that provides both HART and SPI communications using configurable pin assignments that support multiple operation modes. This is complemented by adaptive power switching, built-in diagnostics for open-circuit/short-circuit detection, a high-accuracy 2.5V reference, and auxiliary channels for sensing and power supply measurements.

Applications

Industrial control systems
Process control
Factory automation

No-OS Build Setup

Please see: No-OS Build Setup

No-OS Supported Examples

The initialization data used in the examples is taken from the Project Common Data Path. The macros used in Common Data are defined in platform-specific files found in: Platform Configuration Path.

Basic Example

The Basic Example demonstrates the fundamental initialization and configuration of the AD74414H device by setting up communication interfaces such as UART and SPI using common data structures in a no-OS environment. To enable the Basic Example and disable other examples, update the Makefile with the following settings:

# Enable Basic Example
EXAMPLE = basic

Current Input External Power Example

The Current Input External Power Example demonstrates channel configuration in externally powered current input mode. It reads the ADC value and computes the input current. To enable this example, update the Makefile with the following settings:

# Enable Current Input External Power Example
EXAMPLE = current_input_ext

Current Input Loop Power Example

The Current Input Loop Power Example demonstrates channel configuration in loop-powered current input mode. It reads the ADC value and computes the input current. To enable this example, update the Makefile with the following settings:

# Enable Current Input Loop Power Example
EXAMPLE = current_input_loop

Current Output Example

The Current Output Example demonstrates channel configuration in current output mode. It sets a DAC code to drive a specified output current on the configured channel. To enable this example, update the Makefile with the following settings:

# Enable Current Output Example
EXAMPLE = current_output

Digital Input Logic Example

The Digital Input Logic Example demonstrates channel configuration in digital input mode with a fixed comparator threshold for logic-level detection. To enable this example, update the Makefile with the following settings:

# Enable Digital Input Logic Example
EXAMPLE = digital_input_logic

Digital Input Loop Example

The Digital Input Loop Example demonstrates channel configuration in digital input mode with loop-powered operation. To enable this example, update the Makefile with the following settings:

# Enable Digital Input Loop Example
EXAMPLE = digital_input_loop

Digital Output Example

The Digital Output Example demonstrates channel configuration in digital output mode with GPIO-based control of the output state. To enable this example, update the Makefile with the following settings:

# Enable Digital Output Example
EXAMPLE = digital_output

No-OS Supported Platforms

Mbed Platform

Used Hardware

Build Command

# Clean previous build artifacts
make clean

# Build the project for the Mbed platform
make PLATFORM=mbed

# Flash the firmware
make flash

# Start a debugging session
make debug