On 7/31/2017 10:52 AM, Fritz Mueller via cctalk wrote:
On Jul 31, 2017, at 8:19 AM, Jay Jaeger <cu...@charter.net> wrote:
I have Ethernet shield for my Arduino Uno, and I use that and a simple
(in my case, perl, program to talk to the final destination device. I
have two cables, one for each direction, from the DR11-C (not using DMA)
to the Arduino.
Awesome -- it seemed likely somebody here would have done this sort of thing
already :-)
Jay, does your Arduino support TTL-level signaling, or did you have to use some
level-shifting chips? How did you arrange the cabling/packaging?
I'm more familiar with FPGA platforms than Arduino, but this might give me a
good excuse to finally play around with Arduino a bit!
--FritzM.
Arduino UNO (the 'original') and the Mega2560 big brother both use 5V I/O
microprocessors, so all the I/O is directly 5V capable.
I happen to prefer the Mega2560 based design because it has a more capable CPU
(lots more flash and RAM), 4 hardware serial ports, and lots of I/O (50+ pins)
and it is not that much more expensive (based on Amazon clone suppliers; direct
from Arduino .org suppliers it is priced way too high for the components it uses).
I used the Mega2560 in my RX01/02 emulator design, with a custom shield to
interface to DEC standard RX11/211/8E 5V controllers using 5V logic. Works fine.
Arduino is pretty simple to program in more or less vanilla C if you want. The
tools are freely downloadable from the web from www.arduino.cc
