Texas Instruments Development Kit for TM4C129x,Tiva™ ARM® Cortex™ -M4 Microcontroller DK-TM4C129X DK-TM4C129X 数据表
产品代码
DK-TM4C129X
Register 54: Ethernet MAC Receive Poll Demand (EMACRXPOLLD), offset
0xC08
0xC08
The Ethernet MAC Receive Poll Demand (EMACRXPOLLD) register enables the RX DMA to
check for new descriptors. This command is used to wake up the RX DMA from the SUSPEND
state. The RX DMA can go into the SUSPEND state only because of the unavailability of descriptors
it owns.
check for new descriptors. This command is used to wake up the RX DMA from the SUSPEND
state. The RX DMA can go into the SUSPEND state only because of the unavailability of descriptors
it owns.
Ethernet MAC Receive Poll Demand (EMACRXPOLLD)
Base 0x400E.C000
Offset 0xC08
Type WO, reset 0x0000.0000
Offset 0xC08
Type WO, reset 0x0000.0000
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
RPD
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
Type
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Reset
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
RPD
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
Type
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Reset
Description
Reset
Type
Name
Bit/Field
Receive Poll Demand
When these bits are written with any value, the DMA reads the current
descriptor pointed to by MAC Current Host Receive Descriptor
(EMACHOSRXDESC) register. If that descriptor is not available (owned
by the Host), the reception returns to the SUSPEND state and the
descriptor pointed to by MAC Current Host Receive Descriptor
(EMACHOSRXDESC) register. If that descriptor is not available (owned
by the Host), the reception returns to the SUSPEND state and the
RU
bit of EMACDMARIS is not asserted. If the descriptor is available, the
RX DMA returns to the active state.
RX DMA returns to the active state.
0x0
WO
RPD
31:0
December 13, 2013
1752
Texas Instruments-Advance Information
Ethernet Controller