Activity

From 01/04/2020 to 02/02/2020

FO 10:38 AM Feature #85: 720p support/1080i support: It seems pretty clear that on the 2nd board can use the reconfigurable clock to provide 27MHz and 74.25MHz hdmi clocks, by reconfiguring it. These can drive clk6p into the 3rd pll, which does x5 for the tmds clk (/2).
For the others..... foft
FO 10:30 AM Feature #85: 720p support/1080i support: Clock switching is proving fun, due to a bunch of constraints!
1st board: 50MHz on H16 (CLK11p) - which is connected to FPLL X0_Y38,X54_Y38, but not the other two
2nd board: : 50MHz on H16 (CLK11p) - which is connected to FPLL X0_Y3... foft

FO 10:13 PM Feature #85: 720p support/1080i support: Cleaned up the i2c wiring to be more generic. crtc wiring working too. Can switch from 720p50 and 1080i50 in firmware now (manual code, not menu yet...). Just wired up polyphasic too, except filter params which are currently hardcoded la... foft

FO 09:58 PM Feature #85: 720p support/1080i support: Adding the i2c wiring to allow these to be controlled from the firmware. So far areascale wired up and working. Now doing crtc, then will do polyphasic. I guess its possible to include both on A4 FPGAs and only one of them on A2 FPGAs.
... foft

FO 09:30 PM Feature #85: 720p support/1080i support: A weeks debugging later, this filter actually really works! foft

FO 10:26 PM Feature #85: 720p support/1080i support: I have a polyphasic version working too, I think. So far I only gave it nearest neighbour coefficients. Rebuilding with Lanczos. foft

FO 11:03 PM Feature #85: 720p support/1080i support: Forgot to mention 1080i working fine as well as 720p.
I was looking at the 3d modes too, but not sure what to use those for ;-) foft
FO 11:02 PM Feature #85: 720p support/1080i support: Plumbed in a 4x4 block of pixels so I can try out polyphasic filters too.
For now its just using a 2x2 block with the area based scale, but got some vertical bug. Stripey!
Using 16KB of block ram now, which is a bit wasteful. 360*4... foft

Also available in: Atom

EclaireXL