Octagon 6000 Series, User Manual

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6000 Series user’s manual EZ I/O
OUT 142H, 1CH (00011100 binary = 1C hexadecimal)
3. Write a “3” to the control register (base r3). This places
the I/O chip back into “operation” mode:
OUT 143H, 3 (control register)
Writing and reading from EZ I/O
Writing to or reading from the desired EZ I/O port is accomplished with
single program statements:
1. To write a bit pattern to the desired EZ I/O port:
OUT 142H, FFH
All bits of port C go high; all input bits are unaffected.
2. To read a bit pattern from the desired EZ I/O port:
PORTC = INP(142H)
The byte read from port C is assigned to variable port C.
EZ I/O output program examples
To configure ports A, B, and C as all outputs, issue the command:
OUT 143H, 2
‘Direction’ Mode
OUT 140H, FFH
‘Port A’
OUT 141H, FFH
‘Port B’
OUT 142H, FFH
‘Port C’
OUT 143H, 3
‘Operation’ Mode
Note With CAMBASIC, you can also accomplish the same configuration and
outputs with one statement. Enter:
CONFIG EZIO &140, &0, &FF, &0, &FF, &O, &FF
Syntax
The CAMBASIC syntax is as follows:
CONFIG EZIO address, dirA, initA, dirB, initB, dirC,
initC
Parameters
Parameters are defined as follows:
n
address specifies the base address of the Octagon EZ I/O parallel I/O
device in use.
n
initA, initB, and initC specify the logic state of portA, port B, and
port C, respectively, when this statement is executed. The value
range is 0 to 255.
n
dirA, dirB, and dirC are the directions of port A, port B, and port C,
respectively. The value 0 of an individual bit specifies output and the
value 1 specifies input.
Note Usually, once the chip is configures with the CONFIG EZ IO statement,
there is no reason to reconfigure this statement again