Imageon HDL project (OBSOLETE)

Overview

The FMC-Imageon is a HDMI input/output FMC card that provides high definition video interface for Xilinx FPGAs. The HDMI input interface is implemented with the ADV7611, a 165MHz, 24bit pixel output, HDCP capable HDMI 1.4a receiver. The HDMI output interface is implemented with the ADV7511, a 225MHz, 36-bit deep color, HDMI 1.4 transmitter.

This reference design provides the video and audio interface between the FPGA and ADV7511/ADV7611 on board. The video uses a 16bit 422 YCbCr interface and the audio uses a single bit SPDIF interface in both directions.

Supported boards

FMC-IMAGEON

Supported devices

Supported carriers

ZedBoard on FMC slot

Block design

The reference design is divided in three parts as related to the functionalities of the board. The first one, related to video transmission, uses the axi_hdmi_tx module and the axi_dmac modules to read 24 bits of RGB data from the SoC’s DDR memory, and then performs the transmission using the corresponding HDMI TX-related controller. On the receive side, the inverse operation is done, by using the HDMI RX-related controller.

In terms of audio part, the axi_spdif module is used to manage the audio output transmission on the HDMI connector. Additionally, a conversion from RGB to YCbCr and a downsampling from 444 to 422 are done in the transmit and receive (in reverse) datapaths as a default operation. To ensure the setup of the ADV7511 and ADV75611 ICs, Xilinx’s AXI IIC module is used.

Block diagram

The data and control paths, along with the corresponding clocks are depicted in the first diagram. As related to the functional description of the HDL modules, this is presented in the second diagram.

FMC-IMAGEON Block Diagram

FMC-IMAGEON Functional Description

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 CPU/Memory interconnects addresses).

Instance	Zynq
axi_iic_main	0x4160_0000
axi_sysid_0	0x4500_0000
axi_hdmi_clkgen	0x7900_0000
axi_hdmi_dma	0x4300_0000
axi_hdmi_core	0x70E0_0000
axi_spdif_tx_core	0x75C0_0000
axi_i2s_adi	0x7760_0000
axi_iic_fmc	0x4162_0000
axi_hdmi_rx_core	0x4310_0000
axi_hdmi_rx_dma	0x43C2_0000
axi_spdif_rx_core	0x75C2_0000
axi_iic_imageon	0x43C4_0000

GPIO

The Software GPIO number is calculated as follows:

Zynq-7000: if PS7 EMIOs are used, then offset is 54

GPIO signal	Direction	HDL GPIO EMIO	Software GPIO
	(from FPGA view)		Zynq-7000
hdmi_iic_rstn	INOUT	33	87
hdmi_rx_int	INOUT	32	86
gpio_bd[31:0]	INOUT	31:0	85:54

Interrupts

Below are the Programmable Logic interrupts used in this project.

Instance name	HDL	Linux Zynq	Actual Zynq
axi_hdmi_dma/irq	15	59	91
axi_hdmi_rx_dma/irq	14	58	90
axi_iic_imageon/iic2intc_irpt	11	55	87

Building the HDL project

The design is built upon ADI’s generic HDL reference design framework. ADI distributed the bit/elf files of this project as part of the ADI Kuiper Linux in the 2019_R1 release If you want to build the sources, ADI makes them available on the HDL repository. But, since this is an obsolete project, you need to check out the last release branch where it was tested (hdl_2019_r1). To get the source you must clone the HDL repository, and then build the project as follows:

Linux/Cygwin/WSL

/hdl$

git checkout hdl_2019_r1

/hdl$

cd projects/imageon/zed

/hdl/projects/imageon/zed$

 make

A more comprehensive build guide can be found in the Build an HDL project user guide.

Resources

HDL related

IMAGEON HDL project source code

IP name	Source code link	Documentation link
AXI_CLKGEN	library/axi_clkgen	AXI CLK Generator
AXI_DMAC	library/axi_dmac	AXI DMAC
AXI_HDMI_RX	library/axi_hdmi_rx	AXI HDMI RX
AXI_HDMI_TX	library/axi_hdmi_tx	AXI HDMI TX
AXI_SYSID	library/axi_sysid	AXI System ID
SYSID_ROM	library/sysid_rom	AXI System ID
AXI_SDDIF_RX	library/axi_spdif_rx	—

More information

ADI HDL User guide

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.