Reference Manual AFDX / ARINC 664 Application Interface Library
69
Section 4 – Function Reference: Transmitter Functions
See also the notes for ul_Skew parameter in redundant mode.
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The Packet Group Wait Time (PGWT) provides the capability to implement a sequencing
control for one or a group of frames. Each time, if a frame is processed where the
PGWT value is not zero, the BIU- Processor handles the corresponding timing. The
PGWT value (20bit) specifies the time from the transmission start point of the last frame
where the PGWT value is processed to the start point of the current frame with a
resolution of 1us.
At the processing of the first frame after the operation is enabled or after the execution of
a 'Wait for Trigger' instruction, the PGWT value is ignored and the frame is transmitted
immediately.
This Gap is only used if
uc_FrameStartMode
is set to
FDX_TX_START_FRAME_PGWT.
For Start ModeFDX_TX_START_FRAME_TRG_D this field describes the delay time
between trigger pulse and start of frame in µs.
IFG = 0
PGWT = T1
IFG = T2
PGWT = 0
IFG = T3
PGWT = 0
IFG = 0
PGWT = TN
T2
T3
IFG = 0
PGWT = T4
T4
TN
TX
T1
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