On Tue, 7 Sep 2021, Ralph Stirling wrote:
Date: Tue, 7 Sep 2021 02:32:32 +0000
From: Ralph Stirling <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: "[email protected]" <[email protected]>
Subject: [Emc-users] 7c81 vhdl questions
I'm having trouble figuring out which FPGA I/O pins
are connected to tx0, rx0, tx1, and rx1 for the two
RS422 connectors on the 7c81. I don't see any of
those pins in the UCF file, so they must be tied to
gpio somewhere else. Grepping for TX0 in the *_34.vhd
pin files seems to give a variety of I/O pins assigned
to sserial tx0 pins (IO 04, 05, 10, 15, 21, 27 according
to the comments). I'm missing a link in the chain somewhere.
Thanks,
-- Ralph
The 7C81 is organsied as a 57 pin device
Take a look at PIN_5ABOBx2D_57.VHD
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Mesa Electronics
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