Numeric Values

Hello again, hope everybody´s fine!

I have some little problem here. I am receiving serial data (numbers) and I need to compare them (is it "compare them" well written?), anyways, I need to do so, but it seems that when I try to compare this data, it is taken as ascii code, so I always get the same result no matter what the data is. Is there a way to make a kind of cast to convert this ascii data into numeric data so I can do my comparison?
Thank all of you and special thank to Adam who´s I´ve been receiving too much help from.

Armando.

look for DEC modifier or #

Post your code here, it will be easier to answer

As Steve said, post your code so we do not have to guess. If your data is in ASCII, then

Decimal 0 = 48 in ASCII
Decimal 1 = 49 in ASCII
Decimal 2 = 40 in ASCII
etc.

You can convert your received ASCII numbers to decimal by

Code:

---

X VAR Byte ' Received value
X = X – 48 ' convert from ASCII to decimal (or X = X - “0” does the same thing)
If X < 7 THEN Something ' your compare

---

or you could do your compare like this

Code:

---

X VAR Byte ' Received value
If X < “7” THEN Something ' “7” = decimal 55 but is 7 in ASCII

---

Again, post your code if you cannot make yours work.

Paul Borgmeier
Salt Lake City, Utah
USA

Well, thank you for your answers. The code I am using is something like this:

hserin [skip 2, str var\4 \32]

I know that I´m gonna recieve numbers, so I need to do something like this:

if var == 100 then
code here...
else
if var < 100 then
code her...
else
code here...
endif
endif

just that var contains ascii data. I had already though about some code to convert that ascii data to numbers but I´d like to know if there is something quicker because I receive data from 1 to 3 digits and I´m trying to write the less lines possible.

Thanks to all of you again.

Armando Hdez.

Armando,

I believe “str” it is referring to an array string not a string string. You should have something like this as the variable declare. (Let's change your variable name from VAR to RX_Var since VAR is reserved)

RX_Var var byte[4]

Then with your call, if your incoming data looks like this

49 ' ascii 1
50 ' ascii 2
51 ' etc.
52
53
54


hserin [skip 2, str RX_Var\4 \32 ]

Your data captured data will look like

RX_Var[0]=51
RX_Var[1]=52
RX_Var[2]=53
RX_Var[3]=54

If you need more help or suggestions, let us know ...

Paul Borgmeier
Salt Lake City, Utah
USA

Ok thank you! You´re right I have an array but then you are telling me there´s another way to get a string of characters serialy?? What do you mean with a "string string"?? Thank you very much I really appreciate it!

Armando.

Quote:

---

Originally Posted by Armando Herjim

... What do you mean with a "string string"?? ...

---

Poor choice of words on my part – there is no string variable in PBP. i.e., you cannot have RX_Var = “Hi There” in PBP even though it is allowed in most traditional BASIC programs if RX_Var is declared as a string variable (See Visual Basic for example). You can have

X[0]=”H”
X[1]=”i”
X[2]=” “
etc.

You have a few choices from what I can see. You can make sure you always send and receive 4 digits of a decimal number and use DEC as Steve suggested. Or you could “roll your own” with your array values: (highly unoptimized but should get the point across)

NewValue VAR WORD

RX_Var[0]=51
RX_Var[1]=52
RX_Var[2]=53
RX_Var[3]=54

IF RX_Var[0] = “ “ THEN GoSomeWhere
NewValue = RX_Var[0] - “0”

FOR X = 1 to 3
IF RX_Var[X] = “ “ THEN GoSomeWhere
NewValue = (NewValue * 10) + RX_Var[X]-”0”
NEXT X

You also can probably do it with all the options of SERIN2 but I have not used them enough to be able to suggest the format. Someone else?

Good Luck,

Paul Borgmeier
Salt Lake City, Utah
USA

A quick after thought - why not just send and receive your data a low byte and a high byte of a word sized variable and be done.

For example

X var word

X = 456 ' your "desired" value

send
X.lowbyte = 200
X.highbyte = 1

then X will be 456 - done.

Paul

Hey that seems to be an excellent idea. Thank you very much!!!