Pike
Technical
Manual
V5.2.3
172
Description of the data path
Description
of
the
data
path
To read data:
1.
Query
RDRD
flag
(buffer
ready?)
and
write
the
number
of
bytes
the
host
wants
to
read
to
RBUF_CNT.
2.
Read
the
number
of
bytes
pending
in
the
receive
buffer
RBUF_ST
(more
data
in
the
buffer
than
the
host
wanted
to
read?)
and
the
number
of
bytes
left
for
reading
from
the
receive
FiFo
in
RBUF_CNT
(host
wanted
to
read
more
data
than
were
in
the
buffer?).
3.
Read
received
characters
from
SIO_DATA_REGISTER,
beginning
at
char
0.
4.
To
input
more
characters,
repeat
from
step
1.
To write data:
1.
Query
TDRD
flag
(buffer
ready?)
and
write
the
number
of
bytes
to
send
(copied
from
SIO
register
to
transmit
FiFo)
to
TBUF_CNT.
2.
Read
the
available
data
space
left
in
TBUF_ST
(if
the
buffer
can
hold
more
bytes
than
are
to
be
transmitted)
and
number
of
bytes
written
to
transmit
buffer
in
TBUF_CNT
(if
more
data
is
to
be
transmitted
than
fits
in
the
buffer).
3.
Write
character
to
SIO_DATA_REGISTER,
beginning
at
char
0.
4.
To
output
more
characters,
repeat
from
step
1.
Note
•
Contact
your
local
distribution
partner
if
you
require
further
information
or
additional
test
programs
or
software.
•
Allied
Vision
recommends
the
use
of
Hyperterminal™
or
other
communication
programs
to
test
the
functionality
of
this
feature.
Alternatively
use
SmartView
to
try
out
this
feature.
