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. In order to build this example make sure you are using this command:

python tools/scripts/no_os_build.py build \
    --project ad74414h --variant basic --board sdp-ck1z

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. In order to build this example make sure you are using this command:

python tools/scripts/no_os_build.py build \
    --project ad74414h --variant current_input_ext --board sdp-ck1z

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. In order to build this example make sure you are using this command:

python tools/scripts/no_os_build.py build \
    --project ad74414h --variant current_input_loop --board sdp-ck1z

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. In order to build this example make sure you are using this command:

python tools/scripts/no_os_build.py build \
    --project ad74414h --variant current_output --board sdp-ck1z

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. In order to build this example make sure you are using this command:

python tools/scripts/no_os_build.py build \
    --project ad74414h --variant digital_input_logic --board sdp-ck1z

Digital Input Loop Example

The Digital Input Loop Example demonstrates channel configuration in digital input mode with loop-powered operation. In order to build this example make sure you are using this command:

python tools/scripts/no_os_build.py build \
    --project ad74414h --variant digital_input_loop --board sdp-ck1z

Digital Output Example

The Digital Output Example demonstrates channel configuration in digital output mode with GPIO-based control of the output state. In order to build this example make sure you are using this command:

python tools/scripts/no_os_build.py build \
    --project ad74414h --variant digital_output --board sdp-ck1z

No-OS Supported Platforms

STM32

Used Hardware

Connections

Connect the EVAL-AD74414H to the EVAL-SDP-CK1Z (SDP-K1) through the SDP connector. The SDP-K1 is powered and communicates with the host over its USB-C port, which also exposes the UART console.

Build Command

The STM32 platform uses the CMake/Ninja build system via the no_os_build.py helper script. Available variants: basic, current_input_ext, current_input_loop, current_output, digital_input_logic, digital_input_loop, digital_output. Available boards: sdp-ck1z.

For toolchain setup and prerequisites, see the STM32 CMake build guide.

# set the path to STM32CubeMX and STM32CubeIDE (only if they are not
# in a default install location)
export STM32CUBEMX=</path/to/stm32cubemx>
export STM32CUBEIDE=</path/to/stm32cubeide>
# PowerShell (Windows) equivalent:
#   $env:STM32CUBEMX = "C:\ST\STM32CubeMX"
#   $env:STM32CUBEIDE = "C:\ST\STM32CubeIDE"

cd no-OS

# build the example on the SDP-K1 board (replace --variant as needed)
python tools/scripts/no_os_build.py build \
    --project ad74414h --variant basic --board sdp-ck1z

# build and flash (requires a connected debug probe)
python tools/scripts/no_os_build.py build \
    --project ad74414h --variant basic --board sdp-ck1z \
    --probe openocd --flash