Serial communication

SAN

I want to send data to the Basic Stamp through serial port.
when i tried with SERIN() command i wouldn't receive any data.
can you help me to connect by Basic Stamp with PC through serial port using any of I/O pins?
Help me with the connection and codes.
I am sending the data using RoboRealm serial option.

Mike Green

The Stamp Basic Manual describes how to do this in the chapter on the SERIN statement (page 395?) and the chapter on the DEBUGIN statement.
If you still have problems, you will need to post a schematic showing how you're connecting the Stamp and your PC and a listing of your program
(both as attachments to your reply).

SAN

Sir I still have problem. the basic stamp 2 module does not receive any signal.
my basic stamp code is -
' {$STAMP BS2}
' {$PBASIC 2.5}

x VAR Byte
DO
SERIN 0,16780,[noparse][[/noparse]DEC2 x]
IF x=10 THEN
HIGH 15
ELSE
LOW 15
ENDIF
LOOP

and in the RoboRealm vb-script code is -

width = GetVariable("IMAGE_WIDTH")
center = width / 2
size = GetVariable("COG_BOX_SIZE")
'if size <> "" then
cogx = GetVariable("COG_X")
if cogx < center-5 then
testx = 10
elseif cogx > center+5 then
testx = 20
end if
SetVariable "LEFT_MOTOR", CInt(testx)

in serial module i am sending the variable -
[noparse][[/noparse]LFT_MOTOR]
in baudmode 9600

I am using laptop with Windows vista and USB to Serial converter

I am using the same connection shown in the Basic Stamp Manual pg- 395 [noparse][[/noparse]I/P = pin 3, pin 1,4,6 shorted and pin 5 = VSS]

RoboRealm sending the variable but the basic stamp does not response.

Sir please help me.

allanlane5

Yup, the "Programming Port" is on "SERIN 16, 16780, [noparse][[/noparse]DEC X]", not on "SERIN 0, ..."

SAN

Sorry sir,
but where,I mean which port I should connect the TX pin (Pin 3) of the RS232 port.

sylvie369

If you are using the Stamp's built-in serial port, you use "16".

However, it would be easier to just use "DEBUG" and "DEBUGIN" to do what you're doing, I think. With those, you don't have to worry about Baud or which pin to use - just leave the Stamp connected as you do when programming it. You should definitely read those sections of the Stamp manual.

SAN

Thank you very much sir.
It is working.