Xilinx HDMI 1.4 Product Manual page 90

Usage
The HDMI 1.4/2.0 Transmitter Subsystem provides a set of API functions for application
code to use. On top of that, when HDMI 1.4/2.0 Transmitter Subsystem hardware interrupts
are generated, the subsystem driver is invoked to configure the system accordingly. HDMI
1.4/2.0 Transmitter Subsystem provides callback structure to hook up your own callback
functions.
Ensure that the video stream has started. Then, valid AUX data and audio data can be
inserted after the video is locked. However, because the application knows what video
format will be sent and what audio format will be embedded. With this information, the
ACR number can be calculated and set before audio stream is ready to be sent.
In the following sections, only HDMI related modules are covered. The user application
needs to take care of system peripheral, such as timer, UART, external system clock
generator, etc.
HDMI TX Subsystem Flow
HDMI TX Subsystem in general responses to the following two events:
• Hot-plug signal (HPD) from the sink device
• Software user application to indicate a change of video stream (e.g. change of video
resolution)
The main program flow is shown in
initializes the HDMI TX Subsystem IP and registers the callback functions in the provided
hooks.
HDMI 1.4/2.0 TX Subsystem
PG235 October 4, 2017
Appendix C: Application Software Development
Figure C-3. At execution, the software application
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