Question about ARRAYWRITE

[circuitpro]

I've been looking at this all day, and it just doesn't work:

'PIC18F6722
OSC 40
ARRAYSIZE  CON  20
DJAM      CON     %01110111
ACK       CON     $06 
COMMAND   VAR     BYTE[20]
MESSAGE   VAR     BYTE[20]

LOOP1:
ARRAYWRITE MESSAGE,[HEX ACK," ",BIN DJAM]
ARRAYREAD MESSAGE, [COMMAND]
DEBUG STR COMMAND,10,13                                                     
ARRAYWRITE MESSAGE,[REP 0\ARRAYSIZE]
PAUSE 1000
GOTO LOOP1

OUTPUT:
61110111

If I just say "HEX ACK" it produces 61110111 (no space as I specified). If I try to use "HEX2 ACK", it doesn't show the first value OR the space, just the binary number! I need to write some rather complicated structured messages and store them, but I've found that

1) IN NO CASE will ARRAYWRITE write more than two items... (if there is more, they just don't show). The exact same structure prints fine using DEBUG.

For example: ARRAYWRITE MESSAGE, ["DJ_TMR",DEC X,":",DEC DJ_TMR[X]] will only show the first two values... DJ_TMR, and DEC X - nothing further.

2) ARRAYWRITE won't work with indexed variables.

All efforts done in PBP 2.60A. If anyone can tell me what I'm doing wrong, I would be most grateful!

L.

[Darrel Taylor]

Try it like this.

'pic18f6722
osc 40
arraysize  con  20
djam      con     %01110111
ack       con     $06 
command   var     byte[20]
message   var     byte[20]

loop1:
  Arraywrite message,[hex ack," ",bin djam,0]
  debug str message,10,13                                                     
  arraywrite message,[rep 0\arraysize]
  pause 1000
goto loop1

[circuitpro]

ok, but what is that doing? Once the array is written, and presumably saved for some time, don't I have to use ARRAYREAD to read it back into a variable to then use it? You are showing me that the message is proper, but I'm not proving a READ. WHAT IS THAT 0 FOR???????

[Darrel Taylor]

ok, but what is that doing?

It's writing string data to an Array, then sending it out using DEBUG.

Once the array is written, and presumably saved for some time, don't I have to use ARRAYREAD to read it back into a variable to then use it?

No, once it's in the array it's ready to send.
You would only need to use ARRAYREAD if string data had been received.

WHAT IS THAT 0 FOR???????

The 0 terminates the string.
When using DEC, HEX, BIN etc. The length of the string is not constant, and you have to mark the end so PBP can find it.
The STR operator in the DEBUG statement will stop sending data from the array when it encounters a 0.

[circuitpro]

ouch, that hurts!