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Full Discussion: The Start Of A Simple Audio Scope Shell Script...
Top Forums Shell Programming and Scripting The Start Of A Simple Audio Scope Shell Script... Post 302827657 by wisecracker on Sunday 30th of June 2013 07:36:49 AM
Old 06-30-2013
Horizontal shift is now complete.

This is the last of the quick and easy parts of the code.

From now on the distance between uploads could be high as HW will be needed.
This has to be ludicrously simple so as to be built by a 10 year old.

The next upload will be the frequency counter needed for two parts of this
project. However this is a while away yet so now to desribe the X shift control.
(I WILL post a fully working Python version of a frequency counter I wrote ages
ago that uses /dev/dsp.)

Horizontal shift, from the cammand line window type:-

HSHIFT<CR>

Using the keys r, R, l, L, and Q or q change the position of the scan like this:-

r shifts scan to the right by one scan size, (64 bytes).
R shifts scan to the right by one byte at a time.
l shifts scan to the left by one scan size, (64 bytes).
L shifts scan to the left by one byte at a time.
Q or q exits this mode.

The keys respond like INKEY$ in BASIC...
No user values are changed except switching from real grab to rescan mode.
The TB speed will always be the fastest available although it could be made
variable if so desired. I decided against it as this is useful for searching
for odd wavefronts. The status line will let you know where in the file the
start of the current scan is...

Enjoy...

P.S. In the process of building a simple, starter, Y amplifier input ATM...
Also the script is about 38KB in size now...
00092.sh (36.9 KB) 
Last edited by wisecracker; 07-14-2013 at 07:44 AM.. Reason: Code now an attachment.
 

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LEARN ABOUT DEBIAN

mdns-scan

MDNS-SCAN(1)						      General Commands Manual						      MDNS-SCAN(1)

NAME

       mdns-scan - Scan for mDNS/DNS-SD services published on the local network

SYNOPSIS

       mdns-scan

DESCRIPTION

       mdns-scan  is  a  tool  for  scanning for mDNS/DNS-SD published services on the local network. It issues a mDNS PTR query to the special RR
       _services._dns-sd._udp.local for retrieving a list of all currently registered services on the local link.

OPTIONS

       mdns-scan has no commandline options.

NOTES

       mdns-scan is not a good mDNS citizen since it queries continuously for services and doesn't implement features like Duplicate  Suppression.
       It is intended for usage as a debugging tool only.

       mdns-scan  is incomplete since it doesn't resolve mDNS services for you - it just dumps their PTR RRs. To understand these records you need
       minimal knowledge of DNS-SD and how it works.

       mdns-scan does not terminate on its own behalf. It scans for services continuously until the user kills it by pressing C-c.

       mdns-scan does not rely on a local mDNS responder daemon. It has no dependencies besides the GNU libc. It has been tested on Linux only.

       mdns-scan does NOT scan for local mDNS enabled hosts or A/AAAA RRs, it scans for DNS-SD registered services, nothing else.

SEE ALSO

       mDNSResponder(8)

AUTHOR

       mdns-scan has been written by Lennart Poettering <mzqrovna@0pointer.de>

0.4								   Jan 21, 2004 						      MDNS-SCAN(1)
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