LM3S1512 Luminary Micro, Inc, LM3S1512 Datasheet - Page 436

• Manufacturer Part Number: LM3S1512
• Description: Lm3s1512 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Reset
Reset
Type
Type
Quadrature Encoder Interface (QEI)
QEI Velocity Counter (QEICOUNT)
QEI0 base: 0x4002.C000
Offset 0x018
Type RO, reset 0x0000.0000
436
Bit/Field
31:0
RO
RO
31
15
0
0
Register 7: QEI Velocity Counter (QEICOUNT), offset 0x018
This register contains the running count of velocity pulses for the current time period. Since this is
a running total, the time period to which it applies cannot be known with precision (that is, a read of
this register does not necessarily correspond to the time returned by the QEITIME register since
there is a small window of time between the two reads, during which time either value may have
changed). The QEISPEED register should be used to determine the actual encoder velocity; this
register is provided for information purposes only. This counter does not increment when VelEn in
QEICTL is 0.
RO
RO
30
14
0
0
RO
RO
29
13
0
0
Name
Count
RO
RO
28
12
0
0
RO
RO
27
11
0
0
Type
RO
RO
RO
26
10
0
0
Reset
0x00
RO
RO
25
0
9
0
Preliminary
RO
RO
24
0
8
0
Description
Velocity Pulse Count
The running total of encoder pulses during this velocity timer period.
Count
Count
RO
RO
23
0
7
0
RO
RO
22
0
6
0
RO
RO
21
0
5
0
RO
RO
20
0
4
0
RO
RO
19
0
3
0
RO
RO
18
0
2
0
July 25, 2008
RO
RO
17
0
1
0
RO
RO
16
0
0
0