Texas Instruments OMAP5912 Reference Manual page 1436

USB Device Controller
Figure 14. Prepare for TX Transfer on Endpoint n Routine
Prepare for USB
TX transfer on
endpoint n routine
Write EP_NUM register:
− EP_NUM.EP_NUM = n
− EP_NUM.EP_DIR = 1
− EP_NUM.EP_SEL = 1
− EP_NUM.SETUP_SEL = 0
Write one packet
(size <=
EPn_TX_SIZE).
144 Universal Serial Bus (USB)
This does not apply to TX
endpoints using DMA, which
are enabled when TXDMAn.START
is set by the LH.
Set CTRL.
SET_FIFO_EN
bit
Write EP_NUM register:
− EP_NUM.EP_NUM = n
− EP_NUM.EP_DIR = 1
− EP_NUM.EP_SEL = 0
− EP_NUM.SETUP_SEL = 0
6 wait
states
End of prepare for
USB TX transfer for
endpoint n routine
At this point, TX data is
written in response to
EPn_TX interrupts.
SPRU761A