Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet
Product codes
ATSAM4S-WPIR-RD
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
1032
40.7.9 UDP Reset Endpoint Register
Name:
UDP_RST_EP
Address:
0x40034028
Access:
Read/Write
EP0: Reset Endpoint 0
EP1: Reset Endpoint 1
EP2: Reset Endpoint 2
EP3: Reset Endpoint 3
EP4: Reset Endpoint 4
EP5: Reset Endpoint 5
EP6: Reset Endpoint 6
EP7: Reset Endpoint 7
This flag is used to reset the FIFO associated with the endpoint and the bit RXBYTECOUNT in the UDP_CSRx. It also
resets the data toggle to DATA0. It is useful after removing a HALT condition on a BULK endpoint. Refer to Chapter 5.8.5
in the USB Serial Bus Specification, Rev.2.0.
Warning:
This flag must be cleared at the end of the reset. It does not clear UDP_CSRx flags.
0: No reset
1: Forces the corresponding endpoint FIF0 pointers to 0, therefore RXBYTECNT field is read at 0 in UDP_CSRx
Resetting the endpoint is a two-step operation:
1: Forces the corresponding endpoint FIF0 pointers to 0, therefore RXBYTECNT field is read at 0 in UDP_CSRx
Resetting the endpoint is a two-step operation:
1.
Set the corresponding EPx field.
2.
Clear the corresponding EPx field.
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
–
–
–
–
–
–
–
–
7
6
5
4
3
2
1
0
EP7
EP6
EP5
EP4
EP3
EP2
EP1
EP0