Run the Demonstration Standalone no‐OS (AD7768) - ArrowElectronics/data-storm-daq GitHub Wiki
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 AD7768 Evaluation Platform in this configuration is comprised of the following components:
- Analog Devices EVAL-AD7768FMCZ 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 Cables
- 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-AD7768FMCZ 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-AD7768FMCZ FMC connector into the FMC mating connector on the DataStorm DAQ board
- Connect the Signal Generator to the EVAL-AD7768FMCZ SMA connectors
- Ensure that Jumper LK1 is in position B and LK2 is in position A on the EVAL-AD7768 board, for it to be powered via the FMC connector
- Ensure that Jumpers SLP1 and SLP2 are in positions A (default) on the EVAL-AD7768 board
- Connect the power supply to the DataStorm DAQ
- Plug the AC-DC adapter into an AC outlet
Signal Source
A signal generator with 2 outputs is used to generate the differential signals driving the AD7768 inputs. The AD7768 expects the input signals to swing between AVSS and AVDD1 (+5V on the EVAL-AD7768 board). This means that the user is expected to provide a true differential input centered at VCOM (AVDD1-AVSS)/2 (as in yellow tag #5 below).
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 window
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 on No synchronization and select Synchronized
Click Run All
Run the no-OS demonstration
Software for no-OS access
There are a few software components that need to be installed in order to run this demo successfully:
- A SW terminal like Tera Term VT or Putty
Connect to the target terminal
- A wired Micro USB serial port connection between the separate Windows PC and the embedded target is required
- Launch a terminal program like Tera Term VT or Putty and connect via a serial port to interact with the demo
- Select 115200 baud
- Select the appropriate target COM port
Run the demonstration
Simply power up the unit. No additional configuration is required. The bare metal application runs automatically and continuously streams analog measurement results across the serial port to be received and displayed in the terminal program running on the separate Windows PC.