Propeller to propeller serial communication demo.

Dgswaner

Does anyone have demo code or a tutorial for propeller to propeller via serial. I'm trying to get 2 RF modules to talk but I don't know if has to do with the RF link or the code. I'm just using the code from Hippy here:
here[noparse]:http:[/noparse]//forums.parallax.com/forums/default.aspx?f=25&m=231500&g=231587#m231587

but there isn't code for receiving data. I can't get the RX function to work.

I'm using the fullduplex serial object.

Thanks in advance

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
"A complex design is the sign of an inferior designer." - Jamie Hyneman, Myth Buster

DGSwaner

Paul Baker

How about Beau's High Speed Serial work here: http://forums.parallax.com/showthread.php?p=691952

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Paul Baker
Propeller Applications Engineer

Parallax, Inc.

Dgswaner

I don't think the Parallax RF modules will support that speed.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
"A complex design is the sign of an inferior designer." - Jamie Hyneman, Myth Buster

DGSwaner

Dgswaner

Here is my code so far, I opted to use the BS2 Functions I just don't know where to begin with it being spin and RF communication. I can't get it to work. The TX part of it seems to be working but the RX side seems to hang on,
BS2.Serin_Str(8,@myString,9600,1,8)

I'd appreciate suggestions on where to go from here.

RX code

---

PUB main
    BS2.Start(31,30)
    dira[noparse][[/noparse] 3 ]~~
    Repeat
        !outa[noparse][[/noparse] 3 ]   'blink led
        BS2.Serin_Str(8,@myString,9600,1,8)   ' Accept string passing pointer for variable
        BS2.Debug_Str(@myString)                     ' display string at pointer
        BS2.Debug_Char(13)                    ' CR
        BS2.Debug_Char(myString)           ' show 6th character
        waitcnt(clkfreq + cnt) 'wait 1 second  

TX code

---

PUB MAIN
    BS2.Start(31,30)
    dira[noparse][[/noparse] 2 ]~~
    repeat
      !outa[noparse][[/noparse] 2 ]  'blink LED
      BS2.Serout_Str(1,string("Spin-Up World!",13),9600,1,8)
      BS2.Serout_Str(1,@myStr,9600,1,8)

Thanks for lookin

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
"A complex design is the sign of an inferior designer." - Jamie Hyneman, Myth Buster

DGSwaner

Post Edited (Dgswaner) : 12/22/2007 4:09:22 PM GMT

deSilva

DIRA ~~
is not the best of all ideas SEROUT does not touch the DIRA!
!OUTA
is even worse! Please understand that you are seriously hurting your communication lines! Logically AND physically, as you shortcircuit the connected pins!

When you use "non-inverted mode" you should initialize the XMIT-line with High to not confuse the receiver so much.

It has turned out that the best way of establishing a stable serial communication is to pull-up the line (1k will be fine) and drive it LOW only. Which means: rather than
OUTA[noparse][[/noparse] n ] := bit
do
DIRA[noparse][[/noparse] n ] := !bit

You can use the code from SimpleSerial which is absolutely simple and serial.

Post Edited (deSilva) : 12/22/2007 10:43:54 AM GMT

Dgswaner

I didn't realize that you had to space out the brackets [noparse][[/noparse] ] for the pin assignments. I've updated the code (above, not my actual code). the !OUTA is to blink an LED as the remark indicates, and has nothing to do with the serial communication. it just lets me know that the propeller is continuing to loop through the program.

I'll take a look at the simple serial code.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
"A complex design is the sign of an inferior designer." - Jamie Hyneman, Myth Buster

DGSwaner

deSilva

o.k. so then it should work "a little bit" when you enable your pin 1 for output in the transmitter program:
DIRA[noparse][[/noparse] 1 ]~~