sony sent me their pdf for the rs232 codes for this system
but i cant figure it out . .

(new to rs232, this will be my second rs232 device)
can someone help me decode it?

all the files can be found here:


[Link: idisk.mac.com]

Baud Rate : 9600bps
Data Bits : 8bit
Parity : No
Stop Bits : 1

These are the port settings for your PC (or Controller) to transmit.

Amp Power on command would send the following string:

02 02 A0 21 3D

02 = start bit (EVERY STRING starts with 02 - that is what the amp listens for)
02 = Bit count (2 - A0 and 21)
A0 = Product code
00 = Code (42-input select) (00 value so skipped in string)
00 = zone (00 value so skipped in string)
21 = function (Power On)
3D = checksum (value of the 3 bits - 02 A0 21)


- OR -

02 04 A0 00 00 21 3B

02 = start bit
04 = Bit count (A0 00 00 21)
A0 = Product code
00 = Code (42-input select)
00 = zone
21 = function
3B = checksum

(This is the identical command but includes the 00 bytes)

Verified from page 8 of rs232protocolreceivers.pdf
and
receiver Checksum Spreadsheet with samples.xls

(use the spread sheet to calculate your checksum)

function is the command sent to do something.... use the pdf to see which code does what and responses are what.

you can try different strings and see the responses from the receiver

When testing RS 232, I RECOMMEND a program called 232Analyzer by CommFront

This is by far the best program I have used for testing and writing my own protocols

I hope this info helps you understand 232 protocol and comand structure.

PS some devices require a carriage return or 0D at the end of the string to send

interesting,
will give it a try . .

thanks !!

Ok I tried verything but it does not work!
I have a STRA-DA 6400 ES with a global caché and Iviewer from command fusion

My first question is do i need a crossed cable or straight?

Secondly I tried al these codes for power on:

02 02 A0 00 00 21 3D 0D
02 02 A0 21 3D 0D
02 04 A0 00 00 21 3B
02 02 A0 21 3D
\x02\x04\xa0\x60\x00\x010\xfb
\x02\x04\xa0\x60\x00\x010\xfb\x03
0x02 0x04 0xa0 0x60 0x00 0x010xfb x03

non of those worked, I don't know what else to try!
Any help is welcome!

nobody?

I tried again and no luck, I think this command should be right:

\x02\x04\xa0\x60\x00\x01\xfb

tried again crossed and straight.

any advice?

BTW rs232 is enable in the menu of the STRA-DA

Have you tried using HyperTerminal?

ok it works, i had to add a carriage return \x03 and use a crossed cable.

I had to read on, but you would need a null modem and CR, but you got it...