Parallax BASIC Stamp 1, Programming Manual

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5: BASIC Stamp Command Reference – SEROUT
BASIC Stamp Programming Manual 2.0c
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Page 305
Serial communication, because of its complexity, can be very difficult to
work with at times. Please follow these guidelines (and those in the
"SERIN Troubleshooting" section of the SERIN command description)
when developing a project using the SERIN and SEROUT commands:
1. Always build your project in steps.
a. Start with small, manageable pieces of code, that deals with
serial communication) and test them, one at a time.
b. Add more and more small pieces, testing them each time, as
you go.
c. Never write a large portion of code that works with serial
communication without testing its smallest workable pieces
first.
SEROUT T
ROUBLESHOOTING
.
BASIC
Stamp
I/O
Pin Gnd
(Vss)
BASIC
Stamp
I/O
Pin
Gnd
(Vss)
To other
devices
To other
devices
1 k
Ω
Vdd
BASIC
Stamp
Vss
I/O
Pin Gnd
(Vss)
BASIC
Stamp
I/O
Pin
Gnd
(Vss)
To other
devices
To other
devices
1 k
Ω
Figure 5.36: SEROUT Open-Drain
Circuit. This circuit is for use with
the Open, Non-inverted baudmode.
Figure 5.37: SEROUT Open-
Source Circuit. This circuit is for
use with the Open, Inverted
baudmode.