Texas Instruments TMS320C6745 DSP - Ping-Pong Buffering for Mcbsp Example Param; Ping-Pong Buffering for Mcbsp Example Pong Param

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SPRUH91D–March 2013–Revised September 2016
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Enhanced Direct Memory Access (EDMA3) Controller
Figure 16-29. Ping-Pong Buffering for McBSP Example PaRAM
(a) EDMA Parameters for Channel 3 (Using PaRAM Set 3 Linked to Pong Set 64)
Parameter Contents Parameter
0010 3000h Channel Options Parameter (OPT)
01D0 0000h Channel Source Address (SRC)
0080h 0001h Count for 2nd Dimension (BCNT) Count for 1st Dimension (ACNT)
1180 0000h Channel Destination Address (DST)
0001h 0000h Destination BCNT Index (DSTBIDX) Source BCNT Index (SRCBIDX)
0080h 4800h BCNT Reload (BCNTRLD) Link Address (LINK)
0000h 0000h Destination CCNT Index (DSTCIDX) Source CCNT Index (SRCCIDX)
0000h 0001h Reserved Count for 3rd Dimension (CCNT)
(b) Channel Options Parameter (OPT) Content for Channel 3
31 30 28 27 24 23 22 21 20 19 18 17 16
0 000 0000 0 0 0 1 00 00
PRIV Reserved PRIVID ITCCHEN TCCHEN ITCINTEN TCINTEN Reserved TCC
15 12 11 10 8 7 4 3 2 1 0
0011 0 000 0000 0 0 0 0
TCC TCCMOD FWID Reserved STATIC SYNCDIM DAM SAM
(c) EDMA Parameters for Channel 2 (Using PaRAM Set 2 Linked to Pong Set 65)
Parameter Contents Parameter
0010 2000h Channel Options Parameter (OPT)
1180 1000h Channel Source Address (SRC)
0080h 0001h Count for 2nd Dimension (BCNT) Count for 1st Dimension (ACNT)
01D0 0004h Channel Destination Address (DST)
0000h 0001h Destination BCNT Index (DSTBIDX) Source BCNT Index (SRCBIDX)
0080h 4840h BCNT Reload (BCNTRLD) Link Address (LINK)
0000h 0000h Destination CCNT Index (DSTCIDX) Source CCNT Index (SRCCIDX)
0000h 0001h Reserved Count for 3rd Dimension (CCNT)
(d) Channel Options Parameter (OPT) Content for Channel 2
31 30 28 27 24 23 22 21 20 19 18 17 16
0 000 0000 0 0 0 1 00 00
PRIV Reserved PRIVID ITCCHEN TCCHEN ITCINTEN TCINTEN Reserved TCC
15 12 11 10 8 7 4 3 2 1 0
0010 0 000 0000 0 0 0 0
TCC TCCMOD FWID Reserved STATIC SYNCDIM DAM SAM
Figure 16-30. Ping-Pong Buffering for McBSP Example Pong PaRAM
(a) EDMA Pong Parameters for Channel 3 at Set 64 Linked to Set 65