3 wire serial connection to BasicStamp?
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Posts: 46,084
Can I use only the Rx, Tx and GND lines to connect a PC to the BS2p?
Can I somehow avoid connecting the DTR line to ATN pin on the BS2p?
i.e. Can I use someother circuitry on the board where I use the BS2p
and avoid having an extra line going to the PC for serial connection?
Thanks a lot
Can I somehow avoid connecting the DTR line to ATN pin on the BS2p?
i.e. Can I use someother circuitry on the board where I use the BS2p
and avoid having an extra line going to the PC for serial connection?
Thanks a lot
Comments
you won't be able to program the BS2P in-circuit.
(that's what the IDE uses to reset and prepare
the chip for download). Plus, the only
use for the ATN pin on the BS2 is to reset the
chip, so you can't re-use the pin on the module.
Since this pin already has all the 232 driver
circuitry it needs, the only savings you get
is one wire -- which seems trivial compared to
all the functionality you lose.
So, if you don't want to program the chip, and
you really want to have just three wires
(RX, TX, and GND) connected, then yes, your
'target' board does not require DTR connected.
It's not needed (to my knowledge) for run-only
use of the BS2. You'll probably have to tie
ATN low, in that case, through a 10Kohm resistor.
--- In basicstamps@yahoogroups.com, "mohammedrasiq"
<mohammedrasiq@y...> wrote:
> Can I use only the Rx, Tx and GND lines to connect a PC to the BS2p?
> Can I somehow avoid connecting the DTR line to ATN pin on the BS2p?
> i.e. Can I use someother circuitry on the board where I use the
BS2p
> and avoid having an extra line going to the PC for serial
connection?
> Thanks a lot
From: "mohammedrasiq" <mohammedrasiq@
> Can I use only the Rx, Tx and GND lines to connect a PC to the BS2p?
> Can I somehow avoid connecting the DTR line to ATN pin on the BS2p?
> i.e. Can I use someother circuitry on the board where I use the BS2p
> and avoid having an extra line going to the PC for serial connection?
> Thanks a lot
data transfer or three lines for bi-directional with no handshaking.
(2,3,5)
Jim
http://www.geocities.com/jimforkin2003/
Original Message
From: mohammedrasiq [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=TYTa9Nt--PJurE22S8reZgWwDDEm9ktTx7WNY4-QkT6dWdfU_E4otV08_ITFetdYrLsGFS1r7-5op5ONZYE]mohammedrasiq@y...[/url
Sent: Thursday, May 08, 2003 12:15 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] 3 wire serial connection to BasicStamp?
Can I use only the Rx, Tx and GND lines to connect a PC to the BS2p?
Can I somehow avoid connecting the DTR line to ATN pin on the BS2p?
i.e. Can I use someother circuitry on the board where I use the BS2p
and avoid having an extra line going to the PC for serial connection?
Thanks a lot
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