Reference Manual AFDX / ARINC 664 Application Interface Library
189
Section 4 – Function Reference: Receiver Functions
Frame Header Word 0 contains following information
A
A
i
i
U
U
I
I
n
n
t
t
1
1
6
6
u
u
w
w
_
_
V
V
l
l
I
I
d
d
Virtual Link Identifier, associated with the frame
A
A
i
i
U
U
I
I
n
n
t
t
1
1
6
6
u
u
w
w
_
_
E
E
r
r
r
r
o
o
r
r
F
F
i
i
e
e
l
l
d
d
This bit-oriented information is a cumulative list of error types which have occurred.
The Library function
FdxTranslateErrorWord
translates the given Error Word into a zero
terminated string, containing ‘/’ separated Error abbreviations (see Abbreviation Column)
Bit
Error Type
Abbreviation
0
Wrong physical Symbol during frame reception.
PHY
1
Wrong Preamble/Start Frame Delimiter received.
PRE
2
Unaligned Frame length received (Triple Nibble
Error).
TRI
3
MAC CRC Error.
CRC
4
Short Interframe Gap Error (<960ns)
IFG
5
AFDX IP Framing Error (AFDX-IP frame specific
settings violated).
IPE
6
AFDX MAC Framing Error (AFDX-MAC frame
specific settings violated).
MAE
7
Frame without valid Start Frame Delimiter received
SFD
8
Long Frame Received ( > 1518 Bytes)
LNG
9
Short Frame Received ( < 64 Bytes)
SHR
10
VL specific Frame size Violation
VLS
11
Sequence No. mismatch
SNE
12 not
used
RS2
13
Traffic Shaping Violation
TRS
Rest not
used
A
A
i
i
U
U
I
I
n
n
t
t
3
3
2
2
u
u
l
l
_
_
F
F
r
r
a
a
m
m
e
e
H
H
e
e
a
a
d
d
e
e
r
r
W
W
o
o
r
r
d
d
_
_
1
1
Frame Header Word 1 contains following information
Value
Bit
Description
Network ID
31..29
The network on which the Frame was received
001: Frame received Network A
010: Frame received Network B
others: reserved
Interframe Gap High
28
A indication that the gap between two frames was
greater than 655,36 µs
Interframe Gap Count
27..14
Counter of the interframe gap with a resolution of
40ns, if the gap is lower than 655,36 µs. (Example: A
‘Interframe Gap Count’ – value of 5 is a gap time of
5*40ns = 200ns)
Reserved 13..11
Byte Count
10..0
Byte count of the received AFDX / MAC – Frame
(incl. CRC Bytes).
Frame Header Word 2 contains following information
A
A
i
i
U
U
I
I
n
n
t
t
8
8
u
u
c
c
_
_
S
S
e
e
q
q
u
u
e
e
n
n
c
c
e
e
N
N
r
r
Sequence number (copied from AFDX frame)
A
A
i
i
U
U
I
I
n
n
t
t
8
8
u
u
c
c
_
_
R
R
e
e
s
s
e
e
r
r
v
v
e
e
d
d
1
1
Reserved
A
A
i
i
U
U
I
I
n
n
t
t
1
1
6
6
u
u
w
w
_
_
B
B
u
u
f
f
f
f
e
e
r
r
S
S
i
i
z
z
e
e
Size of the frame entry ( Data) in Bytes (Note: CRC Bytes are not
stored)
T
T
Y
Y
_
_
F
F
D
D
X
X
_
_
F
F
W
W
_
_
I
I
R
R
I
I
G
G
_
_
T
T
I
I
M
M
E
E
x
x
_
_
F
F
w
w
I
I
r
r
i
i
g
g
T
T
i
i
m
m
e
e
The Firmware IRIG time tagged to this frame. The reference point for the Time Tag is the start
of the preamble, transferred in front of this frame.
