Texas Instruments TMS320C64x DSP Benutzerhandbuch
TSI Capture Mode
3-41
Video Capture Port
SPRU629
3.8.6
Writing to the FIFO
The captured TSI packet data and the associated timestamps are written into
the receive FIFO. The packet data is written first, followed by the timestamp.
The FIFO controller controls both data writes and timestamp writes into the
FIFO. The FIFO data packing is shown in Figure 3–25.
the receive FIFO. The packet data is written first, followed by the timestamp.
The FIFO controller controls both data writes and timestamp writes into the
FIFO. The FIFO data packing is shown in Figure 3–25.
Figure 3–25. TSI FIFO Packing
TSI FIFO
TSI 2
TSI 4
TSI 6
TSI 1
TSI 3
TSI 5
TSI 7
VDIN[9–2]
VCLKIN
63
56 55
48 47
40 39
32
TSI 5
TSI 4
TSI 7
TSI 6
TSI 13
TSI 12
TSI 15
TSI 14
Little-Endian Packing
TSI 8
TSI 10
TSI 9
TSI 11
TSI 0
31
24 23
16 15
8 7
0
TSI 1
TSI 0
TSI 3
TSI 2
TSI 9
TSI 8
TSI 11
TSI 10
TSI FIFO
63
56 55
48 47
40 39
32
TSI 5
TSI 4
TSI 7
TSI 6
TSI 13
TSI 12
TSI 15
TSI 14
Big-Endian Packing
31
24 23
16 15
8 7
0
TSI 1
TSI 0
TSI 3
TSI 2
TSI 9
TSI 8
TSI 11
TSI 10
The data capture circuitry signals to the synchronizing circuit when to take a
timestamp of the hardware counters. The FIFO write controller keeps track of
number of bytes received in a packet. It multiplexes the timestamp data and
the packet data onto the FIFO write data bus. The timestamp and packet error
information are inserted after each packet in the FIFO and must use the correct
endian byte ordering. The format for the timestamp is shown in Figure 3–26
and Figure 3–27.
timestamp of the hardware counters. The FIFO write controller keeps track of
number of bytes received in a packet. It multiplexes the timestamp data and
the packet data onto the FIFO write data bus. The timestamp and packet error
information are inserted after each packet in the FIFO and must use the correct
endian byte ordering. The format for the timestamp is shown in Figure 3–26
and Figure 3–27.
Figure 3–26. TSI Timestamp Format (Little Endian)
63
62
61
42
41
33
32
PERR
PSTERR
Reserved
PCR extension
PCR
31
0
PCR