AD7124-ASDZ HDL project
Overview
The HDL reference design for the AD7124-4 and AD7124-8 provides a 4/8-Channel, Low Noise, Low Power, 24-Bit, Sigma-Delta ADC with PGA and Reference.
The AD7124-4/8 offers output data rates from 1.17 SPS up to 19,200 SPS. The AD7124-4/8 can achieve simultaneous 50 Hz and 60 Hz rejection when operating at an output data rate of 25 SPS (single cycle settling), with rejection in excess of 80 dB achieved at lower output data rates.
This project has a SPI instance to control and acquire data from the AD7124-4/8 24-bit precision ADC. This instance provides support for capturing continuous samples at the maximum sample rate.
Supported boards
Supported devices
Supported carriers
DE10-Nano Arduino shield connector
Block design
Block diagram
The data path and clock domains are depicted in the below diagram:
I2C connections
I2C type |
I2C manager instance |
Alias |
Address |
I2C subordinate |
|---|---|---|---|---|
PS |
i2c1 |
sys_hps_i2c1 |
— |
— |
SPI connections
SPI type |
SPI manager instance |
SPI subordinate |
CS |
|---|---|---|---|
PS |
SPI |
ad7124 |
0 |
GPIOs
The Software GPIO number is calculated as follows:
DE10-Nano: the offset is 32
GPIO signal |
Direction |
HDL GPIO EMIO |
Software GPIO |
|---|---|---|---|
(from FPGA view) |
DE10-Nano |
||
sync_err |
INPUT |
32 |
0 |
spi_miso |
INPUT |
33 |
1 |
Building the HDL project
The design is built upon ADI’s generic HDL reference design framework. ADI distributes the bit/elf files of these projects as part of the ADI Kuiper Linux. If you want to build the sources, ADI makes them available on the HDL repository. To get the source you must clone the HDL repository, and then build the project as follows:
Linux/Cygwin/WSL
~$
cd hdl/projects/ad7124_asdz/de10nano
~/hdl/projects/ad7124_asdz/de10nano$
make
A more comprehensive build guide can be found in the Build an HDL project user guide.
Resources
More information
Support
Analog Devices, Inc. will provide limited online support for anyone using the reference design with ADI components via the EngineerZone FPGA reference designs forum.
For questions regarding the ADI Linux device drivers, device trees, etc. from our Linux GitHub repository, the team will offer support on the EngineerZone Linux software drivers forum.
For questions concerning the ADI No-OS drivers, from our No-OS GitHub repository, the team will offer support on the EngineerZone microcontroller No-OS drivers forum.
It should be noted, that the older the tools’ versions and release branches are, the lower the chances to receive support from ADI engineers.