BASIC stamp manual v2.2

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SEROUT – BASIC Stamp Command Reference

Page 420 • BASIC Stamp Syntax and Reference Manual 2.2 • www.parallax.com

Here, SEROUT will transmit a byte equal to 65 (the ASCII value of the

character "A") through pin 1. If the BASIC Stamp were connected to a PC

running a terminal program (set to the same baud rate) the character "A"

would appear on the screen (see the ASCII character chart in Appendix A).

What if you really wanted the value 65 to appear on the screen? If you

remember from the discussion in the SERIN command, "It is up to the

receiving side (in serial communication) to interpret the values…" In this

case, the PC is interpreting the byte-sized value to be the ASCII code for

the character "A". Unless you're also writing the software for the PC, you

can't change how the PC interprets the incoming serial data, so to solve

this problem, the data needs to be translated before it is sent.

The SEROUT command provides a formatter, called the decimal

formatter, which will translate the value 65 to two ASCII codes for the

characters "6" and "5" and then transmit them. Look at the following code:

SEROUT 1, N2400, (#65)

--or--

SEROUT 1, 16780, [DEC 65]

Notice the decimal formatter in the SEROUT command. It is the “#” (for

the BS1) or “DEC” (for all BS2 models) that appears just to the left of the

number 65. This tells SEROUT to convert the number into separate ASCII

characters which represent the value in decimal form. If the value 65 in the

code were changed to 123, the SEROUT command would send three bytes

(49, 50 and 51) corresponding to the characters "1", "2" and "3".

All BS2 models have many more conversion formatters available for the

SEROUT command. See the “Additional Conversion Formatters” section

below for more information.

The SEROUT command sends quoted text exactly as it appears in the

OutputData list:

SEROUT 1, N2400, ("Hello" CR)

SEROUT 1, N2400, ("Num = ", #100)

--or--

SIMPLE NUMERIC CONVERSION; DECIMAL

ASCII NUMERIC TEXT.

This is written with the BS2's Baudmode

value. Be sure to adjust the value for

your BASIC Stamp model.

All