Sending a Constant in a String

TurnipTruck

DEFINE_CONSTANT
CHAR cnPowerSet[]= "$A0,$60"

SEND_STRING dvDevice,"cnPowerSet,$0A,$0D"

How come the , in the constant is being sent? I've used similar methods before and never had the , in the output.

Thanks.

Hedberg

Don't use double quote string expressions in define_constant -- it doesn't work as you would hope.

Try something like:

char cnPowerSet = {$A0,$60}

TurnipTruck

Hedberg wrote:

Try something like:

char cnPowerSet = {$A0,$60}

Tried that too. Same result.

abandol

Try to use it with a variable:
Some like that:

define_variable
CHAR astrPowerSet[]= {$A0,$60}

SEND_STRING dvDevice,"astrPowerSet,$0A,$0D"

Hedberg

I made an error in my prior post.

this is what it should have been:

define_constant

char cnPowerSet[] = {$A0,$60}


That results in an array with two elements and appears as expected in debug.

This:

define_constant

char cnPowerSet[] = "$A0,$60"

results in an array with seven elements and appears to be identical to this:

char cnPowerSet[] = '$A0,$60'

It appears that trying to use double quotes to define a string expression in define_constant should cause a rhs error and not compile -- instead Netlinx misinterprets the syntax and gives an unintended result.

yuri

define as a variable, then fill the variable in define_start?

avi_dave

just do this

Code:
DEFINE_CONSTANT
CHAR cnPowerSet[4] //four elements

DEFINE START

cnPowerSet = "$A0,$60,$0A,$0D" //fill array

DHawthorne

avi_dave wrote: »

just do this

Code:
DEFINE_CONSTANT
CHAR cnPowerSet[4] //four elements

DEFINE START

cnPowerSet = "$A0,$60,$0A,$0D" //fill array

I'm not so sure that will give you the desired results - you are declaring a constant, then changing it's value in startup. So it's either not going to work, or it's not really a constant.

It's also unnecessarily cumbersome, in my opinion, when CHAR cnPowerSet[] = {$A0,$60,$A0,$0D} gives an identical result, and is on a single line, where you can see all you need without jumping around.

avi_dave

point taken, other side of the coin when doing string queing, I can change the element value lets say I need to do checksums, I know it needs 4 elements for power lets say, so for that I just declare a variable type array and fill it as I go along