Figure 369. Normal Bulk/Control Out/Setup And Bulk/Control In Transactions - ST STM32F40 Series Reference Manual

USB on-the-go full-speed (OTG_FS)

Figure 369. Normal bulk/control OUT/SETUP and bulk/control IN transactions

init _reg(ch_2)
set _ch_en
set _ch_en
set _ch_en
read_rx_sts
read_rx_fifo
set _ch_en
read_rx_stsre
read_rx_sts
read_rx_sts
De-allocate
The channel-specific interrupt service routine for bulk and control OUT/SETUP
transactions is shown in the following code samples.
●
Interrupt service routine for bulk/control OUT/SETUP and bulk/control IN
transactions
a)
Unmask (NAK/TXERR/STALL/XFRC)
if (XFRC)
{
Reset Error Count
Mask ACK
1119/1422
Application
1
init_reg(ch _1)
1
write_tx_fifo
(ch_1)
2
(ch _2)
2
write_tx_fifo
(ch_1)
5
(ch _2)
(ch _2)
5
(ch _2)
7
De-allocate
(ch_1)
ad_rx_fifo
7
Disable
(ch _2) 9
11
(ch _2)
13
Bulk/Control OUT/SETUP
Doc ID 018909 Rev 4
AHB Host
4
1
3
MPS
ch_1
1
ch_2
MPS
ch_1
ch_2
3
4
RXFLVL interrupt
1
ch_1
MPS
ch_2
ch_2
ch_2
6
RXFLVL interrupt
6
1
MPS
ch_2
8
RXFLVL interrupt
RXFLVL interrupt
10
CHH interrupt r
12
RM0090
USB Device
Non-Periodic Request
Queue
Assume that this queue
can hold 4 entries.
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