Raptor:Data Logging File IO: Difference between revisions
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! <h5>[[Raptor:Data Logging File Exists|File Exists]]</h5> | ! <h5>[[Raptor:Data Logging File Exists|File Exists]]</h5> | ||
| <p>This block can be used to detect if a file exists on the specified resource.</p> | | <p>This block can be used to detect if a file exists on the specified resource.</p> | ||
| [[file: | | [[file:RaptorDataLoggingFileExists.png|frameless|border|File Exists block|center]] | ||
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! <h5>[[Raptor:Data Logging File Get Free Space|File Get Free Space]]</h5> | ! <h5>[[Raptor:Data Logging File Get Free Space|File Get Free Space]]</h5> | ||
| <p>This block returns the free space on the specified resource.</p> | | <p>This block returns the free space on the specified resource.</p> | ||
| [[file: | | [[file:RaptorDataLoggingFileGetFreeSpace.png|frameless|border|File Get Free Space block|center]] | ||
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! <h5>[[Raptor:Data Logging File Open|File Open]]</h5> | ! <h5>[[Raptor:Data Logging File Open|File Open]]</h5> |
Revision as of 21:50, 7 July 2014
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The blocks in this subsystem are used for file I/O on an available file system, such as a USB stick.
Blocks
Block | Description | Appearance |
---|---|---|
File Close |
This block closes an open file and flushes all data written to the file system. All files should be closed before the module powers off to ensure data is not lost. |
|
File EOF |
This block is used to determine if the current file position is at the end of the file. |
|
File Exists |
This block can be used to detect if a file exists on the specified resource. |
|
File Get Free Space |
This block returns the free space on the specified resource. |
|
File Open |
This block opens a file for read and/or write. It outputs a File Handle which is used with other blocks to read, write and seek within the file. |
|
File Position |
This block is used to get the current file position measured in bytes from start of file. |
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File Read |
This block is used to read the contents of a file. |
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File Remove |
This block removes a file from the specified resource. |
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File Rename |
This block is used to rename a file on a resource. It cannot be used to move a file between resources. |
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File Seek |
This block is used to move the current position in a file where the next read or write operation will occur. |
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File Size |
This block returns the size of the specified file in bytes. |
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File Sync |
This block flushes all pending data writes to the flash file system. |
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File Write |
This block is used to write data to a file. The block accepts uint8[] or string data types. |