|
FAST Protocol
< Previous Next >
Re: Identify Frame lenght in FAST UDP packet
Himanshu K / ABC DDLLLL
8 Feb 2012 7:55AM ET Hi Janaka
Binary feeds received have following value in first four bytes.
What will be stop bit here to find message length here ?
case 1.
Uncompressed binary data received
F1 DE 00 83
11110001 11011110 00000000 10000011
Removing first bit and converting to integer value
1110001 11011110 - 0000011
Integer Value
113 94 3
************************************************************************
Case 2
Uncompressed binary data received
01 8B DE 00
00000001 10001011 11011110 00000000
Removing first bit and converting to integer value
- 0001011 1011110 -
Integer Value
- 11 94 -
> frame size also a integer value, So you can use integer encoding/ decoding method to resolve the value and you can identify the field termination by stop bit.
>
>
> > Hi
> >
> > I am receiving UDP packet in following manner
> >
> > |frame size(1)|msg(1)|frame size2|msg(2)|...|frame size(i)|msg(i)|
> > =================================================================
> > UDP PACKET N
> >
> > How to identify frame length so that I can find size of msg(1)...consequently of msg(2)......msg(3)....
> >
> > Frame size usually the first byte but it can be up to 4 bytes of uncompressed data received.How to identify when it's more than 1 byte?
> >
> > Thanks
> >
> > Himanshu
Re: Identify Frame lenght in FAST UDP packet
Himanshu K / ABC DDLLLL 8 Feb 2012 7:55AM ET
|
@FIXProtocol
