[Milkymist-devel] DDC tests

[Sébastien Bourdeauducq]

Hi,

It seems the DDC (Display Data Channel) interface also works on the board. I 
was unable to completely test it - strangely, my monitor responds to I2C 
addresses 0x92/0x93 and 0xb2/0xb3 which I don't find in any spec, and I don't 
have another monitor to test. But the fact that the monitor reliably responds 
to fixed and consecutive I2C addresses means that the electrical interface is 
probably OK.

Michael, can you try the following bitstream and demo firmware on your board 
and screen:
http://www.milkymist.org/ddctest

To load the bitstream, use Impact (assign new programming file to the FPGA, 
then "Program") and use flterm (found in the "tools" directory of the MM SoC 
source tarball) to load the new firmware, with a command such as
flterm --port /dev/ttyUSB0 --kernel boot.bin

Then, the "edid" command in the firmware should dump the EDID block of your 
monitor. Tell me if it works.

Thanks,
Sébastien