EVAL-AD7490SDZ no-OS Example Project

See projects/eval-ad7490sdz (doxygen) for the Doxygen documentation.

Overview

The EVAL-AD7490SDZ is a fully featured evaluation kit for the AD7490. This board operates in standalone mode or in conjunction with the System Development Platform, EVAL-SDP-CB1Z.

Hardware Specifications

The EVAL-AD7490SDZ device has to be supplied with a 7-9V DC voltage and a 3V3/5V VDRIVE voltage from the microcontroller (for the logic level voltage of the SPI communication).

Pin Description

Please see the following table for the pin assignments for the interface connector (SPI Test Points).

Pin

Name

Description

T_CS

Chip-Select

T_DIN

Master-Out Slave-In (MOSI)

T_DOUT

Master-In Slave-Out (MISO)

T_SCLK

Serial Clock

Please see the following table for the pin assignments for the power supply connectors (J8 and J700, respectively).

Pin

Name

Description

1

VDRIVE

5V/3V3 voltage of the MCU

2

GND

Ground

Pin

Name

Description

1

EXT_PWR

7V-9V External DC voltage

2

EXT_GND

External Ground

Also please refer to the following table for the jumper positions on the board.

Jumper

Position

LK701

A

LK101

A

LK102

A

LK19

C

LK17

A

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 which initializes the ad7490 and reads a single voltage channel continuoussly applying scale to it.

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

# Select the example you want to enable by choosing y for enabling and n for disabling
EXAMPLE ?= basic

This is an example that initializes the ad7490 iio descriptor through which an IIO device is initialized as well as it's channels. Then an iio application initialization parameter is used for initializing and running an IIO app through the IIO lib. Finally the client can configure the ad7490 in every way possible througout an IIO interface such as IIO oscilloscope.

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

# Select the example you want to enable by choosing y for enabling and n for disabling
EXAMPLE ?= iio_example

No-OS Supported Platforms

Maxim Platform

Used Hardware

Connections:

EVAL-AD7490SDZ Pin Name	Mnemonic	Function	AD-APARD32690-SL Pin Number
T_CS	CS	SPI interface Chip-Select	P1_0
T_DIN	MOSI	SPI interface MOSI	P1_1
T_DOUT	MISO	SPI interface MISO	P1_2
T_SCLK	SCLK	SPI interface Serial Clock Line	P1_3
VDRIVE	5V/3V3	5V/3.3V DC power supply	5V/3V3
GND	GND	Ground	GND

Build Command

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