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_8154_get_res_distance
:
This function is used to read the value of the residue distance
recorder. The target position recorder is maintained by the
8154 software driver. It records the position to settle down for
current running motion.
_8154_set_res_distance
:
This function is used to change the value of the residue dis-
tance counter
_8154_get_ring_counter
Acquires limitation value of ring counter.
_8154_set_ring_counter
Sets ring counter limitation and enables ring counter function,
wherein command and feedback counters operate as a ring
counter. When ring counter limitation is set to zero, ring counter
function is disabled.
As shown, when ring counter limitation (I32 RingVal) is set to
four, command and feedback counters count up until counter
value equals four, at which point command and feedback coun-
ters reset to zero and the operation is repeated.
Accordingly, as is further shown, when ring counter limitation
(I32 RingVal) is set to four, command and feedback counters
count down until counter value equals zero, command and
feedback counters are reset to four, and the operation is
repeated.
Reset counter value
Reset counter value
Time
Direction : Positive
1
0
2
3
4
1
0
2
3
4
0
Command Pulse Out
Command Counter
(Initial value = 0) or
Feedback Counter
(Initial value = 0)
Reset counter value
Reset counter value
Time
Direction : Negative
3
4
2
1
0
3
4
2
1
0
4
Command Pulse Out
Command Counter
(Initial value = 4) or
Feedback Counter
(Initial value = 4)
Содержание PCIe-8154
Страница 2: ...ii Revision History Revision Release Date Description of Change s 2 00 Oct 7 2015 Initial Release ...
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