SAM3A8C Atmel Corporation, SAM3A8C Datasheet - Page 934
SAM3A8C
Manufacturer Part Number
SAM3A8C
Description
Manufacturer
Atmel Corporation
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SAM3X/A
SAM3X/A
The following flowchart
tiple block transfers with the DMA Controller. Polling or interrupt method can be used to wait for
the end of write according to the contents of the Interrupt Mask Register (HSMCI_IMR).
Figure 37-11. Read Multiple Block and Write Multiple Block
Notes:
1. It is assumed that this command has been correctly sent (see
2. Handle errors reported in HSMCI_SR.
READ_MULTIPLE_BLOCK command (1)
Configure the HDMA channel X
DMAC_SADDRx and DMAC_DADDRx
DMAC_BTSIZE = BlockLength/4
Read status register DMAC_EBCISR
Send SET_BLOCKLEN command (1)
Send WRITE_MULTIPLE_BLOCK or
Send SELECT/DESELECT_CARD
(Figure
Read status register HSMCI_SR
Set the block length
HSMCI_MR |= (BlockLength << 16)
Set the DMAEN bit
HSMCI_DMA |= DMAEN
command (1) to select the card
Send STOP_TRANSMISSION
and Poll Bit FIFOEMPTY
DMAC_CHEN[X] = TRUE
and Poll Bit CBTC[X]
New Buffer ?
XFRDONE = 1
37-11) shows how to manage read multiple block and write mul-
command (1)
RETURN
Poll the bit
No
Yes
(2)
Yes
No
Figure
37-8).
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
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