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kevinb2050
08-18-2008, 07:24 AM
Hi trying to learn how to comunicate between 2 basic stamps - have used sample circuit in basic stamp editor (serin - serout "hello world") but am getting no where - have a BS2e as master and a BS2 as slave any ideas would be appreciated

PJ Allen
08-18-2008, 08:01 AM
Look at SERIN and SEROUT in PBASIC, there's a hook-up diagram, examples, etc.

kevinb2050
08-18-2008, 08:19 AM
if you mean the PBASIC editor this is where i got the hook-up circuit from - I have noticed that the editor has a 1k resistor between P1 and P1 of the stamps yet the Basic stamp reference manual does not have any resistor between thes pins - further the sample code shows on the master serial out is P1, flow control is P0 and on the slave serial in is P0 and flow control P1 - i thought that data transfer would be on the same pin/wire and flow control on the other wire

PJ Allen
08-18-2008, 09:06 AM
If they were going to communicate ("converse") with each other, it'd be easier for me to remember that P0 is an output and P1 is an input (or vice versa, whichever) for consistency.

Unsoundcode
08-18-2008, 09:21 AM
Hi Kevin, the example code taken from the IDE help file has an error, as you pointed out the SO and SI should be connected to each other. Make the following correction in SERIN_SEROUT2.BS2·so that it will·match the wiring in the diagram.

SI············· PIN·····1·············· ' serial input
FC············· PIN·····0

Jeff T.

kevinb2050
08-18-2008, 09:33 AM
thanks guys for the help - it is so nice to know that i am not as dumb as others think i am lol
NOTE to paralax PLEASE FIX the error

kevinb2050
08-18-2008, 09:37 AM
Me again - still not sure why they would have a 1k resistor on the serial wire between the 2 stamps as shown on the help file - think i will leave this out

Franklin
08-18-2008, 09:45 AM
Yeah, go ahead. If you blow up your stamps Parallax will sell you new ones. It's there for protection.

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- Stephen

Unsoundcode
08-18-2008, 09:45 AM
Hi, the resistor will protect your stamp...keep it in there.

Jeff T.

kevinb2050
08-19-2008, 08:25 AM
There is another error in the sample code from the editors help file
Help file SERIN is ok but help file SEROUT has the following error

SERIN SI/FC, Baud, [letter] - the "/" should be the other way "\"

as well as the pins are wrong in the slave code should be as bellow
SI PIN 1 ' serial input
FC PIN 0

Thanks for all the help guys - my 2 stamps are having a great time talking to each other
Now to work on BS2's talking to a SpeakJet Chip lol