TC1784
FlexRay™ Protocol Controller (E-Ray)
User´s Manual
20-221
V1.1, 2011-05
E-Ray, V3.13
below gives some examples for valid cycle sets to be used for cycle counter
filtering:
Receive Buffers
The received message is stored only if the received cycle counter matches an element
of the receive buffer’s cycle set. Channel ID and Frame ID criteria must also be met.
Transmit Buffers
The content of the buffer is transmitted on the configured channels when an element of
the cycle set matches the current cycle counter value and the Frame ID matches the slot
counter value.
20.6.7.4 FIFO Filtering
For FIFO filtering there is one rejection filter and one rejection filter mask available. The
FIFO rejection filter consists of 20 bits for
Channel
(2 bits),
Frame ID
(11 bits), and
Cycle Code
(7 bits). Rejection filter and rejection filter mask can be configured in
Table 20-14 Definition of Cycle Set
Cycle Code
Matching Cycle Counter Values
000000x
B
all Cycles
000001c
B
every second Cycle
at (Cycle Count)mod2
= c
00001cc
B
every fourth Cycle
at (Cycle Count)mod4
= cc
0001ccc
B
every eighth Cycle
at (Cycle Count)mod8
= ccc
001cccc
B
every sixteenth Cycle
at (Cycle Count)mod16
= cccc
01ccccc
B
every thirty-second Cycle at (Cycle Count)mod32
= ccccc
1cccccc
B
every sixty-fourth Cycle
at (Cycle Count)mod64
= cccccc
Table 20-15 Examples for Valid Cycle Sets
Cycle Code Matching Cycle Counter Values
0000011
B
1-3-5-7-
…
.-63
↵
0000100
B
0-4-8-12-
…
.-60
↵
0001110
B
6-14-22-30-
…
.-62
↵
0011000
B
8-24-40-56
↵
0100011
B
3-35
↵
1001001
B
9
↵
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