| | 1 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">\r |
| | 2 | <html lang="en">\r |
| | 3 | <head>\r |
| | 4 | <meta http-equiv="Content-Type" content="text/html; charset=utf-8">\r |
| | 5 | <meta http-equiv="Content-Style-Type" content="text/css">\r |
| | 6 | <link rel="up" title="FatFs" href="../00index_e.html">\r |
| | 7 | <link rel="alternate" hreflang="ja" title="Japanese" href="../ja/fattime.html">\r |
| | 8 | <link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">\r |
| | 9 | <title>FatFs - get_fattime</title>\r |
| | 10 | </head>\r |
| | 11 | \r |
| | 12 | <body>\r |
| | 13 | \r |
| | 14 | <div class="para func">\r |
| | 15 | <h2>get_fattime</h2>\r |
| | 16 | <p>The get_fattime function is called to get the current time.</p>\r |
| | 17 | <pre>\r |
| | 18 | DWORD get_fattime (void);\r |
| | 19 | </pre>\r |
| | 20 | </div>\r |
| | 21 | \r |
| | 22 | \r |
| | 23 | <div class="para ret">\r |
| | 24 | <h4>Return Value</h4>\r |
| | 25 | <p>Currnet local time shall be returned as bit-fields packed into a <tt>DWORD</tt> value. The bit fields are as follows:</p>\r |
| | 26 | <dl class="ret">\r |
| | 27 | <dt>bit31:25</dt>\r |
| | 28 | <dd>Year origin from the 1980 (0..127, e.g. 37 for 2017)</dd>\r |
| | 29 | <dt>bit24:21</dt>\r |
| | 30 | <dd>Month (1..12)</dd>\r |
| | 31 | <dt>bit20:16</dt>\r |
| | 32 | <dd>Day of the month (1..31)</dd>\r |
| | 33 | <dt>bit15:11</dt>\r |
| | 34 | <dd>Hour (0..23)</dd>\r |
| | 35 | <dt>bit10:5</dt>\r |
| | 36 | <dd>Minute (0..59)</dd>\r |
| | 37 | <dt>bit4:0</dt>\r |
| | 38 | <dd>Second / 2 (0..29, e.g. 25 for 50)</dd>\r |
| | 39 | </dl>\r |
| | 40 | </div>\r |
| | 41 | \r |
| | 42 | \r |
| | 43 | <div class="para desc">\r |
| | 44 | <h4>Description</h4>\r |
| | 45 | <p>The <tt>get_fattime</tt> function shall return any valid time even if the system does not support a real time clock. If a zero is returned, the file will not have a valid timestamp.</p>\r |
| | 46 | </div>\r |
| | 47 | \r |
| | 48 | \r |
| | 49 | <div class="para comp">\r |
| | 50 | <h4>QuickInfo</h4>\r |
| | 51 | <p>This function is not needed when <tt><a href="config.html#fs_readonly">FF_FS_READONLY</a> == 1</tt> or <tt><a href="config.html#fs_nortc">FF_FS_NORTC</a> == 1</tt>.</p>\r |
| | 52 | </div>\r |
| | 53 | \r |
| | 54 | \r |
| | 55 | <div class="para use">\r |
| | 56 | <h4>Example</h4>\r |
| | 57 | <pre>\r |
| | 58 | DWORD get_fattime (void)\r |
| | 59 | {\r |
| | 60 | time_t t;\r |
| | 61 | struct tm *stm;\r |
| | 62 | \r |
| | 63 | \r |
| | 64 | t = time(0);\r |
| | 65 | stm = localtime(&t);\r |
| | 66 | \r |
| | 67 | return (DWORD)(stm->tm_year - 80) << 25 |\r |
| | 68 | (DWORD)(stm->tm_mon + 1) << 21 |\r |
| | 69 | (DWORD)stm->tm_mday << 16 |\r |
| | 70 | (DWORD)stm->tm_hour << 11 |\r |
| | 71 | (DWORD)stm->tm_min << 5 |\r |
| | 72 | (DWORD)stm->tm_sec >> 1;\r |
| | 73 | }\r |
| | 74 | </pre>\r |
| | 75 | </div>\r |
| | 76 | \r |
| | 77 | \r |
| | 78 | <p class="foot"><a href="../00index_e.html">Return</a></p>\r |
| | 79 | </body>\r |
| | 80 | </html>\r |
projects / z180-stamp.git / blame_incremental