Sending longs between 2 Props

Tharkun

What is the easiest and fastest way to send longs from one Prop to another ? (with serial object !?)
I want to send 5 longs + 1 char (=21bytes) in one string/step,
Any ideas ?

Tharkun

Phil Pilgrim (PhiPi)

Using the serial object:

····Easiest: Sync character (e.g. "!"), followed by 42 hex digits.

····Faster: DLE (i.e. $10), "!", followed by 21+ bytes of data. When data byte == DLE, send two DLEs in a row. Receiver synchronizes on DLE, "!" and replaces double DLEs with single DLEs.

-Phil

Mike Green

This sends the contents of a 5 long array (myArray) one byte at a time, followed by some other single byte (myByte). You can't send it using the string transmit function because one of the bytes might be a zero and that would terminate the string value. In any event, this code would execute much faster than the time needed to actually transmit the data.

for x from 0 to 4
   for y from 0 to 3
      ser.tx(myArray.byte[noparse][[/noparse](x<<2) + y])
ser.tx(myChar)

Phil Pilgrim (PhiPi)

Tharkun,

Mike has provided a good nuts and bolts answer to your question. As long as the receiver and transmitter stay in sync, it will do the job for you. In addition to the synchronization methods I mentioned, timing gaps between data bursts will also work. As an alternative, break sequences (sustained serial low states) can be used to punctuate the bursts as well.

-Phil

Cluso99

If you want really really fast, there was a recent thread using 32bit mode, I think by Beau from an original test by Chip. It may be referred to in my SixBladeProp thread.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Links to other interesting threads:

· Home of the MultiBladeProps (SixBladeProp)
· Prop Tools under Development or Completed (Index)
· Emulators (Micros eg Altair, and Terminals eg VT100) - index
· Search the Propeller forums (via Google)

My cruising website is: ·www.bluemagic.biz

Beau Schwabe

Cluso99,
Here is a link to the program·you are referring to... the only stipulation is that the receiver MUST already be running before you transmit. The purpose of this program was to provide a fast conduit between two Propellers for data transfer.· It is not full duplex, it is not even standard serial communication, It was written specifically in mind for the Propeller.· With a little bit of handshaking, you could modify this program to function bidirectionally.

http://forums.parallax.com/showthread.php?p=691952





▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Beau Schwabe

IC Layout Engineer
Parallax, Inc.

Cluso99

Thanks Beau - I had looked at the code and a few other suggestions. I am going to give them a try with my TriBladeProp soon

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Links to other interesting threads:

· Home of the MultiBladeProps (SixBladeProp)
· Prop Tools under Development or Completed (Index)
· Emulators (Micros eg Altair, and Terminals eg VT100) - index
· Search the Propeller forums (via Google)

My cruising website is: ·www.bluemagic.biz