Scannex ip.buffer, Руководство пользователя

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Scannex ip.buffer User Manual
© UK 2007-2021 Scannex Electronics Ltd. All rights reserved worldwide.
1 2 . S to ra g e
Each channel can control how the NAND flash is apportioned.
Reserved
1
When the NAND flash is full the memory manager will ask around
the storage areas requesting a block 2 . A storage file can
decide whether it will give up a block for the benefit of
another.
If the total memory in the channel is less than the reserved value
the memory manager will ask another storage file.
This mechanism allows for the protection of data. However, if the
file uses less than the reserved amount the memory is
available for other files.
“
0
” will disable this feature for the channel. [0]
Maximum
When a storage file wants to save data in the NAND flash it will
consult this limit. If the file has more than this amount it
will not ask the manager for more space – instead it will
sacrifice some of its own, or ditch the new data
(depending on the “When full” setting).
“
0
” will disable this feature for the channel – allowing the
channel to use up to the total amount of memory in the
ip.buffer. (“When full” does not apply.) [0]
When full
“
Erase old data
” – reuse an old block from this channel. The
“Lost Old” counter will increase.
“
Stop storing
” – throw away new data. The “Lost New”
counter will increase when the channel reaches the
“Maximum” value
3 . [Erase old data]
Full Alert
Specifies the trigger level (in megabytes) to send a channel based
full alert. The tag is “
Full n
”.
0 will disable the alert for the given channel. [0]
1 Not visible in the ip-1 product range
2 One block = 128k-bytes
3 Note, this is not when the storage area is full!
Page 107
Scannex ip.buffer User Manual
© UK 2007-2021 Scannex Electronics Ltd. All rights reserved worldwide.
1 2 . S to ra g e
Each channel can control how the NAND flash is apportioned.
Reserved
1
When the NAND flash is full the memory manager will ask around
the storage areas requesting a block 2 . A storage file can
decide whether it will give up a block for the benefit of
another.
If the total memory in the channel is less than the reserved value
the memory manager will ask another storage file.
This mechanism allows for the protection of data. However, if the
file uses less than the reserved amount the memory is
available for other files.
“
0
” will disable this feature for the channel. [0]
Maximum
When a storage file wants to save data in the NAND flash it will
consult this limit. If the file has more than this amount it
will not ask the manager for more space – instead it will
sacrifice some of its own, or ditch the new data
(depending on the “When full” setting).
“
0
” will disable this feature for the channel – allowing the
channel to use up to the total amount of memory in the
ip.buffer. (“When full” does not apply.) [0]
When full
“
Erase old data
” – reuse an old block from this channel. The
“Lost Old” counter will increase.
“
Stop storing
” – throw away new data. The “Lost New”
counter will increase when the channel reaches the
“Maximum” value
3 . [Erase old data]
Full Alert
Specifies the trigger level (in megabytes) to send a channel based
full alert. The tag is “
Full n
”.
0 will disable the alert for the given channel. [0]
1 Not visible in the ip-1 product range
2 One block = 128k-bytes
3 Note, this is not when the storage area is full!
Page 107