Question regarding RX on FullDuplexSerial

Oldbitcollector (Jeff)

I'm writing a communication routine that checks for data from both the propeller keyboard as well as a remote source.

Here's a snippet from the routine.

PRI getline | i, c ,a,d,e
   i := 0
   repeat
      c := key.getkey

      e := ser.rx
      text.out(e)

When the code hits e:=ser.tx it freezes, I assume waiting for something to actually come back
from the remote source. Can someone show me a way to make it behave more like the key.getkey function
so that it doesn't care if nothing is there or not and keeps on going? I'm running this in a loop, so it will
have a chance to check again in a few milseconds.

Thanks!
Oldbitcollector

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Buttons . . . check. Dials . . . check. Switches . . . check. Little colored lights . . . check.

— Calvin, of 'Cavin and Hobbes.

deSilva

Bad luck, Bitcollector! SimpleSerial sports no buffer where a byte is assembled in parallel to your main activities. You have to use a more advanced object that will occupy a COG to do that.

deSilva

Ooops, you are already using FullDuplexSerial, so do:

PUB rxcheck : rxbyte

'' Check if byte received (never waits)
'' returns -1 if no byte received, $00..$FF if byte

Oldbitcollector (Jeff)

Bingo! This works..

PRI getline | i, c ,a,d,e
   i := 0
   repeat
      c := key.key
      if c <> 0
         'text.out(c) 'Half Duplex when this line is not remarked
         ser.tx(c)
         if c == fReturn
           ser.tx(10)
           ser.tx(13)
         if c == bspKey
           ser.tx(8)

      e := ser.rxtime(10)
      if e > 10
           'text.dec(e)
           text.out(e)

Now, I've got a terminal program on my prop!
(Been dialing TelBBS systems with the propeller today. *very cool*)

Now to the bigger project. [noparse]:)[/noparse]
Oldbitcollector

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Buttons . . . check. Dials . . . check. Switches . . . check. Little colored lights . . . check.

— Calvin, of 'Cavin and Hobbes.