SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 362

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

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Multi-buffer DMAC Transfer with Linked List for Source and Contiguous Destination Address (Row 2)
SAM3X/A
SAM3X/A
16. Source and destination request single and chunk DMAC transactions to transfer the
17. Source and destination request single and chunk DMAC transactions to transfer the
18. Source and destination request single and chunk DMAC transactions to transfer the
1. Read the Channel Handler Status register to choose a free (disabled) channel.
2. Set up the linked list in memory. Write the control information in the
– ii. If the hardware handshaking interface is activated for the source or destination
buffer of data (assuming non-memory peripherals). The DMAC acknowledges on com-
pletion of each chunk/single transaction and carries out the buffer transfer.
a. Set up the transfer type (memory or non-memory peripheral for source and desti-
a. Designate the handshaking interface type (hardware or software) for the source
b. If the hardware handshaking interface is activated for the source or destination
buffer of data (assuming non-memory peripherals). DMAC acknowledges at the com-
pletion of every transaction (chunk and single) in the buffer and carries out the buffer
transfer.
– i. Set up the transfer type (memory or non-memory peripheral for source and
– i. Designate the handshaking interface type (hardware or software) for the source
– ii. If the hardware handshaking interface is activated for the source or destination
buffer of data (assuming non-memory peripherals). The DMAC acknowledges at the
completion of every transaction (chunk and single) in the buffer and carries out the buf-
fer transfer.
LLI.DMAC_CTRLAx and LLI.DMAC_CTRLBx register location of the buffer descriptor
for each LLI in memory for channel x. For example, in the register, you can program the
following:
specific channel. Writing a ‘0’ activates the software handshaking interface to handle
source/destination requests.
peripheral, assign handshaking interface to the source and destination peripheral.
This requires programming the SRC_PER and DST_PER bits, respectively.
destination) and flow control device by programming the FC of the DMAC_CTRLBx
register.
and destination peripherals. This is not required for memory. This step requires
programming the SRC_H2SEL/DST_H2SEL bits, respectively. Writing a ‘1’ activates
the hardware handshaking interface to handle source/destination requests for the
specific channel. Writing a ‘0’ activates the software handshaking interface to handle
source/destination requests.
peripheral, assign the handshaking interface to the source and destination
peripheral. This requires programming the SRC_PER and DST_PER bits,
respectively.
nation) and flow control peripheral by programming the FC of the DMAC_CTRLBx
register.
and destination peripherals. This is not required for memory. This step requires pro-
gramming the SRC_H2SEL/DST_H2SEL bits, respectively. Writing a ‘1’ activates
the hardware handshaking interface to handle source/destination requests for the
specific channel. Writing a ‘0’ activates the software handshaking interface
source/destination requests.
peripheral, assign handshaking interface to the source and destination peripheral.
This requires programming the SRC_PER and DST_PER bits, respectively.
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12