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Figure 15.13. Normal Bulk/Control OUT/SETUP and Bulk/Control IN Transactions in DMA Mode
init_reg( ch_2)
Applicat ion
1
init_reg( ch_1)
1
AHB
1
MPS
H ost
2
USB
D e v ice
Non-Periodic Request
Queue
Assum e that this queue can
hold 4 entries.
1
MPS
ch_1
2
ch_2
ch_1
ch_2
3
OUT
DATA0
M PS
ACK
IN
5
De- allocat e
(ch_1)
1
MPS
CHHLTD int errupt
3
ch_1
ch_2
ch_2
5
ch_2
4
De- allocat e
(ch_2)
8
1
MPS
CHHLTD int errupt
4
ch_2
6
7
DATA0
ACK
OUT
DATA1
M PS
ACK
IN
DATA1
AC _K
15.4.3.6.7.4 Handling Interrupts
The channel-specific interrupt service routine for bulk and control OUT/SETUP transactions in DMA
mode is shown in the following code samples.
2013-05-08 - Wonder Gecko Family - d0233_Rev0.50
263
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