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Atlys and HDMI on Linux
Xilinx App Note 495 describes sample
implementations of DVI/HDMI receiver and transmitter on the
Digilent Atlys board. I built the code using WebPACK 12.4, and it
works as advertised: The colorbar test pattern displays nicely on
my HDMI monitor.
Also installed Digilent's
Linux version of their Adept tools for FPGA programming. They don't
seem to have the full GUI version available, but the command-line
tool was able to load my test code (as a WebPACK-generated .bit
file) into the Atlys FPGA with no problem. Don't see any way to
load code into the SPI flash: it appears that Windows-based tools
are still needed for that.
Only one minor
glitch: I use Debian, which isn't one of Digilent's supported
distributions. In recent versions of Debian, the udev package
doesn't allow plugin devices to have protection mode 0666, which
means that the Digilent tools will only work if run as root.
The fix is to edit "/etc/udev/rules.d/52-digilent-usb.rules" and
add a group:
then any user in the
"plugdev" group can run the Digilent tools. The /etc/group file
should have a line like
where "jr" is my
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