LM3S3748 Datasheet, PDF (195/753 Pages) List of Unclassifed Manufacturers – Microcontroller

LM3S3748 Microcontroller
alternate control structures to switch back and forth between buffers as the data flows to or from
the peripheral.
Refer to Figure 9-2 on page 195 for an example showing operation in Ping-Pong mode.
Figure 9-2. Example of Ping-Pong DMA Transaction
uDMA Controller
SOURCE
Primary Structure DEST
transfers using BUFFER A
BUFFER A
Cortex-M3 Processor
Peripheral/uDMA _Interrupt
SOURCE
Alternate Structure DEST
transfers using BUFFER B
BUFFER B
Peripheral/uDMA _Interrupt
SOURCE
Primary Structure
DEST
transfers using BUFFER A
BUFFER A
Peripheral/uDMA _Interrupt
SOURCE
Alternate Structure DEST
transfers using BUFFER B
BUFFER B
Process data in BUFFER A
Reload primary structure
Process data in BUFFER B
Reload alternate structure
Process data in BUFFER B
Reload alternate structure
April 08, 2008
195
Preliminary