Newport ESP300 Series, Руководство пользователя, Страница: 166 / 314

SB
set / get DIO port A, B bit status
IMM PGM MIP
USAGE
♦ ♦ ♦
SYNTAX SB nn or SB ?
PARAMETERS
Description
nn [ int ] - hardware limit configuration
Range
nn - 0 to 0FFFFFFH (hexadecimal with leading zero(0) )
or ? to read current setting
Units
nn - None
Defaults nn missing: error 38, COMMAND PARAMETER MISSING
out of range: error 7, PARAMETER OUT OF RANGE
DESCRIPTION This command is used to either set all digital I/O (DIO) port A, B, and C logic
level or read its present status. Bits 0-7 correspond to port A, bits 8-15 to port B,
and bits 16-23 to port C. Each 8-bit port can be set as either input or output with
the
BO command.
A DIO within a port configured as an input can only report its present HIGH or
LOW logic level. Whereas a DIO bit within a port configured as an output can
set(1) or clear(0) the corresponding DIO hardware to HIGH or LOW logic level.
Reading the status of a port configured as output returns its present output status.
Note:
All direction bits are automatically zeroed, or cleared, after a system reset.
Therefore all DIO ports default to input by default.
Note:
Each DIO bit has a pulled-up resistor to +5V. Therefore, all bits will be at HIGH
logic level if not connected to external circuit and configured as input.
BIT # VALUE DEFINITION
0 0 port A bit-0 at logic level 0 (LOW)
*0 1 port A bit-0 at logic level 1 (HIGH)
1 0 port A bit-1 at logic level 0 (LOW)
*1 1 port A bit-1 at logic level 1 (HIGH)
2 0 port A bit-2 at logic level 0 (LOW)
*2 1 port A bit-2 at logic level 1 (HIGH)
3 0 port A bit-3 at logic level 0 (LOW)
*3 1 port A bit-3 at logic level 1 (HIGH)
4 0 port A bit-4 at logic level 0 (LOW)
continued
*4 1 port A bit-4 at logic level 1 (HIGH)
3-126 Section 3 – Remote Mode