Question about pin assignment

Don M

For example let's say I have PST (or any serial terminal program for that matter) connected to P30 & P31 using fullduplexserial.spin and I have a WiFi module's uart pins connected to P20 & P21. I would have a menu system in my spin code to perform various functions through P30 & P31 with PST.

Now let's say that one of the menu selections might be to configure the WiFi module through it's uart connection using PST. Assuming that P30 & P20 are RX and P31 & P21 are TX respectively could I do something like:

  if (some selection is made to program WiFi)
    ina[20] := ina[30]
    outa[21] := outa[31]

to temporarily re-assign the flow of serial commands?

If it can be done would the baud rate follow through to the new pins and how would I un-assign these (turn that feature off)? Can I do this without launching another instance of fullduplexserial.spin?

Or is there a better way of doing this? Maybe this is a dumb suggestion I don't know......

Thanks.
Don

kuroneko

It's not as simple as that. What you need is the equivalent of:

repeat while connected
    outa[to_pst]  := ina[from_wifi]
    outa[to_wifi] := ina[from_pst]

Main issue here is speed (it's SPIN after all) but it may just be fast enough. You could also do this in PASM at the cost of a cog or even utilise counters. Just see how far you get with the example above. Then we can go from there.

msrobots

Don,

you can not do it like you wrote. Pin-redirection is a feature that will be included in P2 (group-wise) but is not there in P1

But you can Start a second Fullduplexserial on P20/21 and then read one and write to the other in a loop.

Both Fullduplexserial can have different BaudRates als lon gas your buffers are big enought.

so FDS1 talking to PST and FDS2 talking to you WIFI module.

then you can do something like this

   ...
   key:=-1
   exitvar:=false
   repeat 
      key:=FDS1.rxcheck  ' check PST ... rxcheck returns -1 if no key there else ascii code of key
      if key>-1
         if key==27
           exitvar:= true       ' exit loop if esc-key is pressed in PST
         else
           FDS2.tx(key)      ' send key/char to WIFI
      key:=FDS2.rxcheck ' check WIFI ... see above
      if key>-1
         FDS1.tx(key)        ' send key/char to PST
  until exitvar
     

Enjoy!

Mike