AD469X-FMC HDL project#
Overview#
The AD469X HDL reference design provides all the interfaces that are necessary to interact with the devices on the EVAL-AD4696 board.
The design has a SPI Engine instance to control and acquire data from the AD4696 16-bit precisions ADC, providing support to capture continuous samples at maximum sampling rate. Currently the design supports the Zedboard.
Supported boards#
Supported devices#
Supported carriers#
ZedBoard on FMC slot
Block design#
The reference design uses the standard SPI Engine Framework to interface the AD4696 ADC in single SDO Mode. The SPI Engine Offload module, which can be used to capture continuous data stream at maximum data rate, is triggered by the BUSY signal of the device.
Block diagram#
The data path and clock domains are depicted in the below diagram:
CPU/Memory interconnects addresses#
The addresses are dependent on the architecture of the FPGA, having an offset added to the base address from HDL(see more at HDL Architecture).
Instance |
Address |
---|---|
axi_ad469x_dma |
0x44A3_0000 |
spi_clkgen |
0x44A7_0000 |
spi_ad469x_axi_regmap |
0x44A0_0000 |
ad469x_trigger_gen |
0x44B0_0000 |
I2C connections#
I2C type |
I2C manager instance |
Alias |
Address |
I2C subordinate |
---|---|---|---|---|
PL |
iic_fmc |
axi_iic_fmc |
0x4162_0000 |
— |
PL |
iic_main |
axi_iic_main |
0x4160_0000 |
— |
SPI connections#
SPI type |
SPI manager instance |
SPI subordinate |
CS |
---|---|---|---|
PL |
axi_spi_engine |
ad469x |
0 |
GPIOs#
The Software GPIO number is calculated as follows:
Zynq-7000: if PS7 is used, then offset is 54
GPIO signal |
Direction |
HDL GPIO EMIO |
Software GPIO |
---|---|---|---|
(from FPGA view) |
Zynq-7000 |
||
ad469x_resetn |
INOUT |
32 |
86 |
Interrupts#
Below are the Programmable Logic interrupts used in this project.
Instance name |
HDL |
Linux Zynq |
Actual Zynq |
---|---|---|---|
axi_ad469x_dma |
13 |
57 |
89 |
spi_ad469x |
12 |
56 |
88 |
Building the HDL project#
The design is built upon ADI’s generic HDL reference design framework. ADI does not distribute the bit/elf files of these projects so they must be built from the sources available here. To get the source you must clone the HDL repository, and then build the project as follows:
Linux/Cygwin/WSL
1user@analog:~$ cd hdl/projects/ad469x_fmc/zed
2user@analog:~/hdl/projects/ad469x_fmc/zed$ 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.