Texas Instruments TM4C1294NCPDT - Figure 9-6. Peripheral Scatter-Gather, dma Copy Sequence

To Next Page

To Previous Page

Figure 9-6. Peripheral Scatter-Gather, μDMA Copy Sequence

SRC C

TASK A

SRC

DST

COPIED

SRC

DST

COPIED

PRI

ALT

SRC

DST

COPIED

SRC

DST

COPIED

SRC

DST

COPIED

SRC

DST

COPIED

Task List

in Memory

µDMA Control Table

in Memory

Buffers

in Memory

TASK B

TASK C

PRI

ALT

Using the channel’s primary control structure, the µDMA

controller copies task A configuration to the channel’s

alternate control structure.

Then, using the channel’s alternate control structure, the

µDMA controller copies data from the source buffer A to

the peripheral data register.

Task List

in Memory

µDMA Control Table

in Memory

Buffers

in Memory

Using the channel’s primary control structure, the µDMA

controller copies task B configuration to the channel’s

alternate control structure.

Then, using the channel’s alternate control structure, the

µDMA controller copies data from the source buffer B to

the peripheral data register.

µDMA Control Table

in Memory

Buffers

in Memory

Using the channel’s primary control structure, the µDMA

controller copies task C configuration to the channel’s

alternate control structure.

Then, using the channel’s alternate control structure, the

µDMA controller copies data from the source buffer C to

the peripheral data register.

PRI

ALT

Task List

in Memory

TASK A

TASK B

TASK A

TASK C

Peripheral

Data

SRC B

SRC C

Peripheral

Data

SRC A

SRC C

Peripheral

Data

SRC A

SRC B

TASK B

TASK C

SRC B

SRC A

June 18, 2014692

Texas Instruments-Production Data

Micro Direct Memory Access (μDMA)

Main Page

Texas Instruments TM4C1294NCPDT - Figure 9-6. Peripheral Scatter-Gather, dma Copy Sequence

Table of Contents

Related product manuals