Run the no OS Demonstration Standalone (AD738x)

In addition to the DataStorm DAQ development kit running either in standalone mode or remotely via Ethernet cable, it can also run for no-OS software while connected to computer via an usb cable.

Configuration for no-OS software access

The AD738x Evaluation Platform in this configuration is comprised of the following components:

• Analog Devices EVAL-AD738x-FMCZ data converter board
• DataStorm DAQ (Trenz Intel® Cyclone® V SoC TEI0022 Development Board)(includes 12VDC power supply)
• Digilent Analog Discovery 2 Signal Generator with dual outputs
• Digilent Discovery BNC adapter board
• Two (2) BNC Male to SMB Female Cable
• USB connectors

Configure BOOTSEL DIP Switches

Select the SD card as the boot source for the processor.

Configure FMC_VADJ DIP Switches

The FMC_VADJ power rails provide power to the EVAL-AD738x-FMCZ via the FMC interface. This is an adjustable voltage. It must be set to 3.3V. Modify the VID_SW DIP switch settings to select 3.3V.

Assemble the Hardware

Follow the steps in the order shown below.

• Insert the Micro SD card into the SD card slot
• Insert the EVAL-AD738x-FMCZ FMC connector into the FMC mating connector on the DataStorm DAQ board
• Attach the monitor to the DataStorm DAQ using an HDMI cable
• Attach the keyboard and mouse to the DataStorm DAQ using any of the 4 USB ports
• Connect the Signal Generator to the EVAL-AD738x-FMCZ SMA connectors
• Ensure that Jumper LK4 is on position 3,4 for setting external reference to +3.3V, Jumper LK3 is in position 1,2 to to get +12V from FMC on the EVAL-AD738x-FMCZ board, Jumper LK5 is in position 3,4 to get onboard vlogic supply on AD738x.Ensure Jumper LK1 & LK2 is in position 1,2.

• Connect the power supply to the DataStorm DAQ
• Plug the AC-DC adapter into an AC outlet

Signal Source

The AD738x requires a Differential signal from a signal source. AD738x accepts input voltage from GND to VCC centered around VCM=(GND-Vref)/2, and differential input full voltage swing equal to Vref, above which ADC conversion will saturate. The AD738x, in its default configuration, is setup with Vcc equal to +3.3V. Vref can be set to +2.5V / +3.3v from onboard supply(jumper LK4) or through internal Vref. Here Vref set to +3.3V external so AD738x requires the input signal to be centered around VCM equal to (Vref/2 i.e +3.3V/2) which can be externally given through VCM input on EVAL-AD738x-FMCZ. Connect the Differential signal source to AinA+ and AinA- input of AD738x. Give external noise free variable VCM supply to VCM input & adjust it in range 1V to 2V for better output in FFT plot. A single ended signal generator with 2 outputs can be used to generate the differential signals driving the AD738x inputs by setting second output to track first output in inverted mode on a signal generator.

Install (if not already done) the Digilent WaveForms App.

Open the WaveForms App and Click on Wavegen in the left margin which opens a waveform widow

Click on Channels and select 2
Select Type as Sine
Select Frequency or Period
Set Amplitude to 2V
Set Offset (Common Mode Voltage) to 2.5V
For Channel 2, Match the Channel 1 settings
Select the Phase to 180 degrees for Inverse signal
Click Run All

Software for no-OS access

There are a few software components that need to be installed in order to run this demo successfully:

1. A SW terminal like Tera Term VT or Putty

Connect to the target terminal

• A wired Micro USB serial port connection between the host PC and the embedded target is required
• Launch a linux terminal (like Tera Term VT or Putty) and connect using serial port
• Select 115200 baud
• Select the appropriate target COM port

Run the demonstration standalone for no‐OS (AD738x)

Power up the unit using this hardware configuration.

Application will be automatically run on the system boot up. No configuration is required.

Note: The snapshot demo images are based on AD7380, But similarly it can be applicable for other AD738x platforms.

---

Return to AD738x Quick Start Guide