Figure 386. Receive Fifo Read Task - ST STM32F40 Series Reference Manual

RM0090
●
Reading the receive FIFO
The application must ignore all packet statuses other than IN data packet (bx0010).

Figure 386. Receive FIFO read task

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Bulk and control OUT/SETUP transactions
A typical bulk or control OUT/SETUP pipelined transaction-level operation is shown in
Figure
Unmask RXFLVL
interrupt
Read the received
packet from the
Receive FIFO
Yes
387. See channel 1 (ch_1). Two bulk OUT packets are transmitted. A control
Doc ID 018909 Rev 4
USB on-the-go high-speed (OTG_HS)
Start
No
RXFLVL
interrupt ?
Yes
Mask RXFLVL Unmask RXFLVL
interrupt
Read
OTG_FS_GRXSTSP
PKTSTS
No
0b0010?
Yes
BCNT > 0?
interrupt
No
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