Memory Scatter-Gather, Setup And Configuration - Texas Instruments Concerto F28M36 Series Technical Reference Manual

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Figure 16-3. Memory Scatter-Gather, Setup and Configuration
1
Source and Destination
Buffer in Memory
4 WORDS(SRCA)
A
16 WORDS(SRCB)
B
1 WORD(SRCC)
C
4 (DESTA)
16 (DESTB)
1 (DESTC)
NOTES:
1. Application has a need to copy data items from three separate locations in memory into one combined buf f fer.
2. Application sets up DMA "tasklist" in memory, , which contains the pointers and control configuration for three
µDMA copy "tasks."
3. Application sets up the channel primary control structure to copy each task configuration , one at a time, to the
alternate control structure, where it is executed by the DMA controller. .
SPRUHE8E – October 2012 – Revised November 2019
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2
Task List in Memory
SRC
DST
ITEMS=4
Unused
SRC
DST
ITEMS=16
Unused
SRC
DST
ITEMS=1
Unused
µ
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Channel Control
Table in Memory
"TASK" A
"TASK" B
"TASK" C
µ
M3 Micro Direct Memory Access ( µDMA)
Functional Description
3
SRC
Channel Primary
DST
Control Structure
ITEMS=12
SRC
Channel Alternate
DST
Control Structure
ITEMS=n
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