From efa13a879df590ce0043a5b4f97597484bf264e1 Mon Sep 17 00:00:00 2001 From: inmarket Date: Wed, 13 Aug 2014 15:48:16 +1000 Subject: Move 3rd Party source to a new directory. Rationalise Fatfs code and fix a couple of configuration issues. --- 3rdparty/fatfs-0.10b/doc/en/printf.html | 93 +++++++++++++++++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100644 3rdparty/fatfs-0.10b/doc/en/printf.html (limited to '3rdparty/fatfs-0.10b/doc/en/printf.html') diff --git a/3rdparty/fatfs-0.10b/doc/en/printf.html b/3rdparty/fatfs-0.10b/doc/en/printf.html new file mode 100644 index 00000000..96a84b81 --- /dev/null +++ b/3rdparty/fatfs-0.10b/doc/en/printf.html @@ -0,0 +1,93 @@ + + + + + + + + +FatFs - f_printf + + + + +
+

f_printf

+

The f_printf function writes formatted string to the file.

+
+int f_printf (
+  FIL* fp,          /* [IN] File object */
+  const TCHAR* fmt, /* [IN] Format stirng */
+  ...
+);
+
+
+ +
+

Parameters

+
+
fp
+
Pointer to the open file object structure.
+
fmt
+
Pointer to the null terminated format string. The terminator charactor will not be written.
+
...
+
Optional arguments...
+ +
+
+ + +
+

Return Values

+

When the function succeeded, it returns number of characters written. When the function failed due to disk full or any error, an EOF (-1) will be returned.

+
+ + +
+

Description

+

The f_printf() is a wrapper function of f_write(). The format control directive is a sub-set of standard library shown as follos:

+ +
+ + +
+

QuickInfo

+

Available when _FS_READONLY == 0 and _USE_STRFUNC is 1 or 2. When it is set to 2, '\n's contained in the output are converted to '\r'+'\n'.

+

When FatFs is configured to Unicode API (_LFN_UNICODE == 1), data types on the srting fuctions, f_putc(), f_puts(), f_printf() and f_gets(), is also switched to Unicode. The character encoding on the file to be read/written via those functions is selected by _STRF_ENCODE option.

+
+ + +
+

Example

+
+    f_printf(&fil, "%d", 1234);            /* "1234" */
+    f_printf(&fil, "%6d,%3d%%", -200, 5);  /* "  -200,  5%" */
+    f_printf(&fil, "%ld", 12345L);         /* "12345" */
+    f_printf(&fil, "%06d", 25);            /* "000025" */
+    f_printf(&fil, "%06d", -25);           /* "000-25" */
+    f_printf(&fil, "%-6d", 25);            /* "25    " */
+    f_printf(&fil, "%u", -1);              /* "65535" or "4294967295" */
+    f_printf(&fil, "%04x", 0xAB3);         /* "0ab3" */
+    f_printf(&fil, "%08LX", 0x123ABCL);    /* "00123ABC" */
+    f_printf(&fil, "%016b", 0x550F);       /* "0101010100001111" */
+    f_printf(&fil, "%s", "String");        /* "String" */
+    f_printf(&fil, "%8s", "abc");          /* "     abc" */
+    f_printf(&fil, "%-8s", "abc");         /* "abc     " */
+    f_printf(&fil, "%c", 'a');             /* "a" */
+    f_printf(&fil, "%f", 10.0);            /* f_printf lacks floating point support */
+
+
+ + +
+

See Also

+

f_open, f_putc, f_puts, f_gets, f_close, FIL

+
+ +

Return

+ + -- cgit v1.2.3