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uphp:functions:fseropen [2017/03/18 20:49] jeff |
uphp:functions:fseropen [2021/09/13 05:57] (current) |
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======fseropen====== | ======fseropen====== | ||
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Open the serial port at the specified baud rate with optional parameters | Open the serial port at the specified baud rate with optional parameters | ||
====Description==== | ====Description==== | ||
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====Parameters==== | ====Parameters==== | ||
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- | Upon success it returns a file handle which may be used together with the other file functions that require a handle such as [[fgets()]], | + | |
- | If the attempt to open the serial port fails it will return 0 | + | ====Return Values==== |
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+ | The file handle may be used together with the other file functions that require a handle such as [[fgets()]], | ||
====Example==== | ====Example==== | ||
- | **Open the serial port at 115200 baud in non-blocking mode:** | + | |
+ | ===Open the serial port at 115200 baud in non-blocking mode=== | ||
<code php> | <code php> | ||
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- | ====See Also==== | + | ====Also |
[[how_tos: | [[how_tos: | ||
- | [[f485open()]] - Open the RS-485 port as a stream | + | [[fopen()]] - Open a file for reading or writing |
+ | |||
+ | [[f485open()]] - Open the RS-485 port at the specified baud rate and parity | ||
[[fsockopen()]] - Open an internet socket connection with optional timeout | [[fsockopen()]] - Open an internet socket connection with optional timeout | ||
- | [[fopen()]] - Open a file for reading | + | [[fread()]] - Read bytes from a file, stream |
- | [[fclose()]] - Close a file, stream or socket | + | [[fgets()]] - Return a single line from a file, stream or socket, with optional size limit |
- | [[feof()]] - Test if no more data is available in a file or stream | + | [[fwrite()]] - Write data to a file, stream |
- | [[fgets()]] - Return a single line from a file or stream, with optional size limit | + | [[feof()]] - Test if no more data is available in a file, stream |
- | [[fread()]] - Return | + | [[filesize()]] - Return |
- | [[fwrite()]] - Write data to a file or stream | + | [[fseek()]] - Position the file pointer in an open file |
+ | |||
+ | [[ftell()]] - Return the current position of a file read/write pointer | ||
+ | |||
+ | [[fclose()]] - Close a file, stream | ||