UART Core with CTS/RTS

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originally posted by badomen@Jun 23 2005, 11:12 AM

i learned a new term reading this post so now i'm curious..... what is "clean" cts/rts mode? (i know flow control but what do you mean by "clean"???). by clean if you mean a clean signal ........ rs232 has never been known to be "clean".

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Hej BadOmen,

with "clean" I meant that only the CTS/RTS and TxD and RxD are used. It is maybe a strange and unofficial term, but since i now have problems with tools like "Hyperterminal" and also "Matlab", where you just specify "FlowControl = Hardware" and do not really know, which pins take part in the communication, I think the term is justified... (When assigning CTS/RTS in a more advanced terminal program, the communication works).

By the way, maybe someone has a experiences with Matlab and CTS/RTS-communication with Nios. I read the Matlab documentation, but did not get it working.

Here are my matlab commands (but I tried other as well):

>> s2 = serial('COM2');

>> set(s2, 'BaudRate', 115200);

>> set(s2, 'FlowControl', 'hardware');

>> set(s2, 'DataTerminalReady', 'off');

>> fopen(s2)

>> fprintf(s2, '%d', 3);

Matlab "freezes" after execution of these commands...

So, if somebody has a good idea, it would be great...