RE: DSP-AX1

["Andy Powell" <Andy@xxxxxxx>]

Please bear in mind that this is my interpretation of what they are
saying..and that this
is all theoretical for me - I don't have a unit to test... unless.... ;-)

I may be able to knock together some VB code for you to do some of this..
but not this weekend
as it's the wife's birthday!!!


1. Connect up the Rx and your pc with proper cable.
2. Within a program (VB should work) open the COM port 9600, 8N1 and with
HARDWARE hanshaking turned on.

3. To get a response from the unit send the following:

ASCII char 17

ASCII Char 17 is DC1

ASCII char 0
ASCII char 0
ASCII char 0

The 3 ASCII char 0 's are the timeout values, by sending 0's we
set NO TIMEOUT.

ASCII char 3

ASCII char 3 is ETX


This should send some data back ( the current configuration of the system)

To read the current config:

a. The first character will (should) be a DC2 (ASCII char 18)

b. Then the model number of the unit responding 5 bytes (characters) long.

c. Then the length of the data to follow 2 bytes (characters) long.

The data will then follow (not clear if it ALWAYS will be 256 bytes long
or as long as
the length secified above in c. The values of the data will be as per the
table on page 2.

eg DT0 (or the first byte) will contain either a zero or a one. Zero
meaning OK and 1 meaning BUSY

The checksum is follows and an ETX (ascii Char 3) terminates the output
from the RX

The above part is the initial communications that MUST take place first
of all. Then when you
want to issue a command:




0 = Command that would be on remote control
1 = Command (???)
2 = System Command


For example to turn the volume up:

Send STX (ASCII CHAR 2)
Send 0   (ASCII char 0)
Send 7
Send 10  (ascii char 10)
Send 1
Send 10  (ascii char 10)

Finally send ETX (ASCII CHAR 3)

The volume should turn up!

Andy


> -----Original Message-----
> From: "Kenneth Watt" <kennethwatt@xxxxxxx>
> To: "UKHA" <ukha_d@xxxxxxx>
> Date: Fri, 8 Jun 2001 08:33:09 +0100
> Subject: [ukha_d] DSP-AX1
>
> > Phil,
> >
> > I got the info on the DSP-AX1's serial port and it looks as if it
is
> to
> > remotely control the amp through a standard RS232, but the stuff
they
> > have
> > sent me is a bit non-descript. There is a command set for the amp
via
> > the
> > port as well as the how-to bit in it, only a few pages but,
frankly,
> I
> > cannot fathom what they are on about. But then, I am not
experienced
> > with
> > this kind of stuff.
> >
> > Do any of you electronics/PC gurus fancy a try at what it does,
if so
> > I'll
> > scan this lot and mail it to you?
> >
> > K.
> >
> >
> >
> > ____________________________________
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> >
>
>
> --- Tag-it! v2.0 (c) Andy Powell ,1998,1999,2000...and beyond..
>
> GYPSY DWARF ESCAPES JAIL: Small Medium at Large.
>
>
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--- Tag-it! v2.0 (c) Andy Powell ,1998,1999,2000...and beyond..

The best way to save face is to keep the lower part shut.





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