Altera DisplayPort MegaCore Function - Manual (Page 102)

DisplayPort API Reference
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You can use the DisplayPort IP core to instantiate sources and sinks. Source instantiations require an
embedded controller (Nios II processor or another controller) to act as the policy maker. Sink instantia‐
tions greatly benefit from and may optionally use a controller.
Altera provides software for source and sink instantiations as two system libraries for the Nios II
processor (
btc_dptx_syslib
and
btc _dprx_syslib
, respectively). The IP core includes an example
main program (
dp_demo_src/main.c
), which demonstrates basic system library use.
Using the Library
The following figure describes a typical user application flow. The user application must initialize the
library as its first operation. Next, the application should initialize the instantiated devices (sink and/or
source), partly in the
btc_dptx_syslib
and
btc_dprx_syslib
data structures and partly in the user
application. You must also implement interrupt service routines (ISRs) to handle interrupts generated by
the DisplayPort core.
When initialization completes, the user application should periodically invoke the library monitoring
function.
Figure 8-1: Typical User Application Flow
Initialize btc_dpxx_syslib
Initialize Source/Sink
Initialize Source/Sink ISR
btc_dpxx_syslib Monitor
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