SEROUT and word variables

aa200orion

I am trying to send a word variable using SEROUT.· Below is the code.· Is there a better way to send a word variable instead of breaking it up as shown below?· Is there a way to break a word into upper and lower bytes?

· SEND_CHARTCODE_TO_AP:

··· eyechartcode = $4164·' 64 = "d"· and 41 = "A" ' test data



···· SEROUT·RB.1,·N9600, eyeChartcode
···· eyeChartcode = eyeChartcode SHR 8
···· SEROUT·RB.1,·N9600, eyechartcode
···· PAUSE 1000

·RETURN

It works, just looks awkward.


Thanks,

Jimmy

JonnyMac

SEROUT only works with bytes so it's best that you encapsulate it in a subroutine and then call it. For programs that don't use interrupts you can code the subroutine like this:

SUB TX_BYTE
  SEROUT TX, Baud, __PARAM1
  ENDSUB

And, of course, it's good practice to define your serial output pin using the PIN declaration, and your baud rate as a constant (see the SX/B help file). Now you can do this:

TX_BYTE eyechartcode_LSB
TX_BYTE eyechartcode_MSB

This assumes that you've defined the variable using Word; the compiler will create the _LSB and _MSB [noparse][[/noparse]byte] variables automatically.

aa200orion

I'll give it a try.··Didn't know about·the 'UNDERSCORE'.

Thanks