Propellers' highbyte and lowbyte

HumanOzz

Hey guys,
i need some help with this,
well, i would like to know whether its possible to access each byte of a word.
for eg, defined blabla as word
then, i would like to know if its possible to access each byte in the propeller?
like in bs2, i can just use blabla.highbyte and blabla.lowbyte to access the bytes.
Basically what i want is to write or read the high and low byte of a word.
Is there really a command in propeller which does this?

HumanOzz

hmm, nvm, i think i can just shift and OR the bytes together..
because i was thinking of combining two bytes into 1 word, 1 of the byte will become the highbyte and the other will be the lowbyte of the word..
so, if i initially set the two bytes to 16-bit size, shift the 1st byte (which will become the highbyte) by 8, den OR them together..
I should be getting the one 1 want right.
(will test later)

Mike Green

You can use BYTE[] to access the individual bytes of a LONG or a WORD. If you have a LONG variable called myLong, you can say BYTE[@myLong][ 0 ] or BYTE[@myLong][ 1 ] or BYTE[@myLong][ 2 ] or BYTE[@myLong][ 3 ].

It works the same way to access individual bytes of a WORD variable or individual words of a LONG variable.

John Abshier

Simplier syntax

CON
  _clkmode = xtal1 + pll16x
  _xinfreq = 5_000_000
control  
OBJ
  Sio  : "FullDuplexSerialPlus"        
Var
  Word Glued

Pub Main | i
  Sio.start(31,30,0,115200)  ' Rx,Tx, Mode, Baud
  waitcnt(clkfreq * 4 + cnt)
  Glued.BYTE[1] := $20  'X     'HIGH BYTE  
  Glued.BYTE[0] := $4B  'Y     'LOW BYTE
  Sio.hex(Glued, 4)      

I assume it works for longs but didn't check

John Abshier