On Thu, 22 Mar 2012, Viesturs L?cis wrote:
Date: Thu, 22 Mar 2012 16:37:14 +0200
From: "[UTF-8] Viesturs L?cis" <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: Greg Bernard <[email protected]>,
"Enhanced Machine Controller (EMC)" <[email protected]>
Subject: Re: [Emc-users] Smart-serial and 7i43
2012/3/22 Greg Bernard <[email protected]>:
Do you have a usb to ttl converter? If so you could use a terminal program and
do a loop-back test (connect RX to TX)
No.
The converter I built is the very first scheme here:
http://www.kmitl.ac.th/~kswichit/Rs422/Rs422.pdf
Viesturs
You can check your converter by looping the RS-422 TX to RX
(TX+ to RX+ TX- to RX-)
and then togging the FPGA TX pin and seeing if the FPGA RX pin follows
(you would need to disable SSERIAL so you catn get contro of the pins as
GPIO = SSERIAL_PORT_0=XXXXXXXX)
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Mesa Electronics
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