Parallax BASIC Stamp 2e - Page 210

OWOUT - BASIC Stamp Command Reference
Page 208 • BASIC Stamp Programming Manual 2.0b • www.parallaxinc.com
Conversion
Formatter
Type of Number Notes
DEC{1..5}
Decimal, optionally fixed to 1
– 5 digits 1
SDEC{1..5}
Signed decimal, optionally fixed to 1
– 5 digits 1,2
HEX{1..4}
Hexadecimal, optio
nally fixed to 1 – 4 digits 1
SHEX{1..4}
Signed hexadecimal, optionally fixed to 1
– 4 digits 1,2
IHEX{1..4}
Indicated hexadecimal, optionally fixed to 1
– 4 digits ($ prefix) 1
ISHEX{1..4}
Signed, indicated hexa
decimal, optionally fixed to 1 – 4 digits
($ prefix)
1,2
BIN{1..16}
Binary, optionally fixed to 1
– 16 digits 1
SBIN{1..16}
Signed binary, optionally fixed to 1
– 16 digits 1,2
IBIN{1..16}
Indicated binary, optional
ly fixed to 1 – 16 digits (% prefix) 1
ISBIN{1..16}
Signed, indicated binary, optionally fixed to 1
– 16 digits (% prefix) 1,2
1 Fixed-digit formatters like DEC4 will pad the number with leading 0s if necessary; ex:
DEC4 65 sends 0065. If a number is larger than the specified number of digits, the
leading digits will be dropped; ex: DEC4 56422 sends 6422.
2 Signed modifiers work under two's complement rules.
The 1-wire protocol has a well-defined standard for transaction sequences.
Every transaction sequence consists of four parts: 1) Initialization, 2) ROM
Function Command, 3) Memory Function Command, and 4)
Transaction/Data. Additionally, the ROM Function Command and
Memory Function Command are always 8 bits wide (1 byte in size) and is
sent least-significant-bit (LSB) first.
The Initialization part consists of a reset pulse (generated by the master)
and will be followed by a presence pulse (generated by all slave devices).
Figure 5.22 details the reset pulse generated by the BASIC Stamp and a
typical presence pulse generated by a 1-wire slave, in response.
THE 1-WIRE PROTOCOL FORMAT.
Table 5.51: OWOUT Conversion
Formatters.