oups ls7766do not using the HCTL2022 have ls7766do's in hand
7766 D0-D7 to D24-31 through 74lcxr2245 configured as bi directional
7766 RS0-2 to A32-34 through 74lcxr2245 configured as out only
7766 CS to cs1 through 74lcxr2245
7766 WR to D23 through 74lcxr2245
7766 RD to D22 through 74lcxr2245
7766 X0/X1 to D21 through 74lcxr2245
Mod5282 Encoder
Re: Mod5282 Encoder
Careful with 5282 base address for chip select. Been a while but just looked at some of my code and started with a base of 0x02800000 as found in some example (Netburner?) and appeared not to interfere with 5282 stuff. Didn't work, thought board screwed up very unhappy. Searched this forum and found a mention to use base addresses >0x080000000 for MOD5282's. Changed code and everything AOK but wasted a couple days trying to find artwork error and debug the hardware design.
Maybe in-the-know-up-to-date hardware designer can comment on addresses to avoid and ones that work.
Maybe in-the-know-up-to-date hardware designer can comment on addresses to avoid and ones that work.
Re: Mod5282 Encoder
Here is what i'm thinking, filter caps are missing it's just a quick drawing
- Attachments
-
- encoder interface
- enc.jpg (163.68 KiB) Viewed 3178 times
-
DBrunermer
- Posts: 67
- Joined: Thu Apr 21, 2011 7:06 am
- Location: Pittsburgh, PA
Re: Mod5282 Encoder
Are you doing this on a dev-kit board or your own? If you're on a kit, I can tell you how to get that function out of the CPLD. It's pretty simple, Xilinx provides great free software, the only thing you'll need is a JTAG programmer.
Dan B.
Dan B.