Octagon 6000 Series, User Manual

Page: 81 / 233

6-16
EZ I/O 6000 Series user’s manual
Ports A, B, and C will now output all “1”s after issuing the following
commands:
OUT 140H, FFH
(port A)
OUT 141H, FFH
(port B)
OUT 142H, FFH
(port C)
or all “0”s after:
OUT 140H, 0
(port A)
OUT 141H, 0
(port B)
OUT 142H, 0
(port C)
Note The outputs of port B on model 6050 are inverted due to the ULN2804
high-current Darlington array.
EZ I/O input program examples
To configure ports A and C as inputs and port B as outputs, issue the
following command:
OUT 143H, 2
‘Direction Mode’
OUT 140H, 0
OUT 141H, FF
OUT 142H, 0
OUT 143H, 3
‘Operation Mode’
To read ports A and C, issue the following commands:
PORTA = INP(140H)
(port A)
PORTC = INP(142H)
(port C)
Note Port B is used as output on the 6050 PC Microcontroller.
≡
Enhanced INT17H function definitions
This section provides definitions for the following functions: Initialize
EZ I/O (1), Write EZ I/O (1), Read EZ I/O (1), Initialize EZ I/O (2), Write
EZ I/O (2), and Read EZ I/O (2).
Initialize EZ I/O (1)
Function: efh
Subfunction: 00h
Purpose: To set the directions and to program the initial values of
an EZ I/O port.
Calling registers: AH efh
AL
00h
DI Port A configuration
xxxxxxxx xxxxxxxxB
xxxxxxxx
Initial data for port A