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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.
Summary of Contents for AFDX / ARINC 664
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