BASIC stamp manual v2.2

READ – BASIC Stamp Command Reference
Page 370 • BASIC Stamp Syntax and Reference Manual 2.2 • www.parallax.com
The following READ command retrieves the value at location 100 and
stores it into the variable called result:
SYMBOL result = B2
READ 100, result
--or--
result VAR Byte
READ 100, result
The EEPROM is organized as a sequential set of byte-sized memory
locations. The READ command normally only retrieves byte-sized values
from EEPROM. This does not mean that you can't read word-sized
values, however. A word consists of two bytes, called a low-byte and a
high-byte. With PBASIC 1.0 or 2.0, if you want to read a word-sized value,
you'll need to use two READ commands and a word-sized variable.
SYMBOL result = W0
SYMBOL resltLo = B0
SYMBOL resltHi = B1
EEPROM (101, 4)
READ 0, resltLo 'read low byte
READ 1, resltHi 'read high byte
DEBUG #result
--or--
result VAR Word
DATA Word 1125
READ 0, result.LOWBYTE 'read low byte
READ 1, result.HIGHBYTE 'read high byte
On all BS2 models, by using the $PBASIC 2.5 directive, you can use a
single READ command with the WORD modifier. For example,
R
EADING WORD VALUES VS. BYTE VALUES.
A
SIMPLE READ COMMAND.
1
All 2
1
All 2
NOTE: this method is required only if
using PBASIC 2.0. See section below
for PBASIC 2.5 method.