MAX14906 no-OS Example Project

See projects/max14906 (doxygen) for the Doxygen documentation.

The MAX14906 is an IEC 61131-2 compliant, high-speed, four-channel industrial digital output, digital input device that can be configured on a per-channel basis as a high-side switch, push-pull driver, or a Type 1 and 3, or Type 2 digital input. The device operates with a supply voltage range of 10V to 40V and is tolerant up to 65V.

The MAX14906EVKIT evaluation kit is designed to evaluate the MAX14906 device. It comes with the MAX14906ATM+ part installed, features an on-board FT2232 USB controller for PC connectivity, and provides per-channel configurability for digital output and input modes. The kit includes diagnostic monitoring for open-wire conditions, output channel states, undervoltage, overtemperature, and other fault conditions. The evaluation kit achieves up to 3.75kVRMS galvanic isolation and supports SafeDemag for safe shutdown of inductive loads in digital output modes.

Applications

Industrial Digital Output and Input Modules
Configurable Digital Input/Output
Motor Control
PLC Systems
Distributed Control Systems (DCS)

Hardware Specifications

Power Supply Requirements

The MAX14906EVKIT requires a 24V DC power supply capable of delivering up to 6.4A. The MAX14906 device operates with a supply voltage range of 10V to 40V and is tolerant up to 65V.

Supply	Minimum Voltage	Maximum Voltage
VDD, VDD1-VDD4	10 V	40 V
V5	4.5 V	5.5 V
VL	2.5 V	5.5 V
VLED	3.0 V	40 V

Board Connectors

Connector	Description
USB Port	Connects the evaluation kit to a PC via the on-board FT2232
VDD1 to VDD4	Field supply connectors powering each DOI channel
J13 Header	Access to all digital signals (SPI, D1-D4, SYNCH, READY, FAULT)
SW1	DIP switch to disconnect on-board FT2232 for external MCU use
CRCEN Jumper	Configures CRC functionality on the SPI interface
GND Test Point	Ground connection for 24 V DC power supply and scope probes
DOI Test Points	Oscilloscope probe points for digital output signal verification

No-OS Build Setup

Please see: https://wiki.analog.com/resources/no-os/build

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 basic example initializes the MAX14906 device via SPI and configures a GPIO interrupt handler for fault detection. It demonstrates LED control by cycling the status LEDs on each channel, sets current limits on the output channels, and monitors fault conditions through interrupt callbacks.

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

The IIO example demonstrates how to use the Industrial I/O (IIO) framework to interface with the MAX14906 device. It initializes the IIO application descriptor and configures the I/O channels, enabling users to interact with the device using IIO-based tools.

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

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

In order to build the IIO 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 = n
IIO_EXAMPLE = y

No-OS Supported Platforms

Maxim Platform

Used Hardware

Connections

When using an external microcontroller, first disconnect the on-board FT2232 controller by opening all switches on SW1 of the MAX14906EVKIT. Then use jumper wires for point-to-point wiring between the J13 header and the target board.

Function	MAX14906 Interface	AD-APARD32690-SL	MAX32666FTHR
SPI Device ID	SPI	4	1
SPI Chip Select	SPI	0	0
SPI Baudrate	SPI	100000	100000
GPIO Fault Port	GPIO	2	0
GPIO Fault Pin	GPIO	21	5
GPIO IRQ ID	GPIO	2	0

Build Command

# to delete current build
make reset
# to build the project
make PLATFORM=maxim TARGET=max32690
# to flash the code
make run

# to delete current build
make reset
# to build the project
make PLATFORM=maxim TARGET=max32665
# to flash the code
make run

STM32 Platform