On 06/20/2017 07:56 PM, Andrew wrote: >> As an academic exercise, I went ahead and wrote a test-driver and >> emulated an EPP slave on some other hardware I had (pretending to be >> 7i43 and 7i90). Not a whole card emulation, but just enough to get the >> communication checked. It all seems to work quite well. >> So, anybody interested in a test drive? > > By coincidence I have an old 7i43 with a few daughter cards like 7i48 and > 7i39. > So I might try testing later this summer. > Is EPP supposed to be more robust than SPI? > Is there an adapter board?
There is no adapter as of yet. You need to make a cable yourself or put two connectors (40-pin female and 26-pin male) on a veroboard and wire it manually (13 connections required, should be doable, see http://media.vagrearg.org/rpi3-lcnc/pi-epp.pdf). The EPP should be more timing-robust because it uses parallel transfers, thus lower frequencies for similar data-transfer rates. However, that is not the only reason to make an EPP driver. The 7i90 can do both SPI and EPP, but the 7i43 only EPP afaict. The 7i43 board is interesting if you do not need that many pins avalable. I'm writing down a procedure for an RPi test-image in another reply. -- Greetings Bertho (disclaimers are disclaimed) ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
