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| <div class="section" id="flash-circular-buffer-fcb"> |
| <h1>Flash Circular Buffer (FCB)<a class="headerlink" href="#flash-circular-buffer-fcb" title="Permalink to this headline">¶</a></h1> |
| <div class="toctree-wrapper compound"> |
| </div> |
| <p>Flash circular buffer provides an abstration through which you can treat |
| flash like a FIFO. You append entries to the end, and read data from the |
| beginning.</p> |
| <div class="contents local topic" id="contents"> |
| <ul class="simple"> |
| <li><p><a class="reference internal" href="#description" id="id1">Description</a></p></li> |
| <li><p><a class="reference internal" href="#usage" id="id2">Usage</a></p></li> |
| <li><p><a class="reference internal" href="#data-structures" id="id3">Data structures</a></p></li> |
| <li><p><a class="reference internal" href="#api" id="id4">API</a></p></li> |
| </ul> |
| </div> |
| <div class="section" id="description"> |
| <h2><a class="toc-backref" href="#id1">Description</a><a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2> |
| <p>Elements in the flash contain the length of the element, the data within |
| the element, and checksum over the element contents.</p> |
| <p>Storage of elements in flash is done in a FIFO fashion. When user |
| requests space for the next element, space is located at the end of the |
| used area. When user starts reading, the first element served is the |
| oldest element in flash.</p> |
| <p>Elements can be appended to the end of the area until storage space is |
| exhausted. User has control over what happens next; either erase oldest |
| block of data, thereby freeing up some space, or stop writing new data |
| until existing data has been collected. FCB treats underlying storage as |
| an array of flash sectors; when it erases old data, it does this a |
| sector at a time.</p> |
| <p>Elements in the flash are checksummed. That is how FCB detects whether |
| writing element to flash completed ok. It will skip over entries which |
| don’t have a valid checksum.</p> |
| </div> |
| <div class="section" id="usage"> |
| <h2><a class="toc-backref" href="#id2">Usage</a><a class="headerlink" href="#usage" title="Permalink to this headline">¶</a></h2> |
| <p>To add an element to circular buffer:</p> |
| <ul class="simple"> |
| <li><p>Call fcb_append() to get the location where data can be written. If |
| this fails due to lack of space, you can call fcb_rotate() to make |
| some. And then call fcb_append() again.</p></li> |
| <li><p>Use flash_area_write() to write element contents.</p></li> |
| <li><p>Call fcb_append_finish() when done. This completes the entry by |
| calculating the checksum.</p></li> |
| </ul> |
| <p>To read contents of the circular buffer: * Call fcb_walk() with a |
| pointer to your callback function. * Within callback function copy in |
| data from the element using flash_area_read(). You can tell when all |
| data from within a sector has been read by monitoring returned element’s |
| area pointer. Then you can call fcb_rotate(), if you’re done with that |
| data.</p> |
| <p>Alternatively: * Call fcb_getnext() with 0 in element offset to get |
| the pointer to oldest element. * Use flash_area_read() to read |
| element contents. * Call fcb_getnext() with pointer to current element |
| to get the next one. And so on.</p> |
| </div> |
| <div class="section" id="data-structures"> |
| <h2><a class="toc-backref" href="#id3">Data structures</a><a class="headerlink" href="#data-structures" title="Permalink to this headline">¶</a></h2> |
| <p>This data structure describes the element location in the flash. You |
| would use it figure out what parameters to pass to flash_area_read() |
| to read element contents. Or to flash_area_write() when adding a new |
| element.</p> |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="k">struct</span><span class="w"> </span><span class="nc">fcb_entry</span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">flash_area</span><span class="w"> </span><span class="o">*</span><span class="n">fe_area</span><span class="p">;</span> |
| <span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">fe_elem_off</span><span class="p">;</span> |
| <span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">fe_data_off</span><span class="p">;</span> |
| <span class="w"> </span><span class="kt">uint16_t</span><span class="w"> </span><span class="n">fe_data_len</span><span class="p">;</span> |
| <span class="p">};</span> |
| </pre></div> |
| </div> |
| <table class="docutils align-default"> |
| <colgroup> |
| <col style="width: 43%" /> |
| <col style="width: 57%" /> |
| </colgroup> |
| <thead> |
| <tr class="row-odd"><th class="head"><p>Element</p></th> |
| <th class="head"><p>Description</p></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="row-even"><td><p>fe_area</p></td> |
| <td><p>Pointer to |
| info about the |
| flash sector. |
| Pass this to |
| flash_area_x |
| x() |
| routines.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>fe_elem_ |
| off</p></td> |
| <td><p>Byte offset |
| from the start |
| of the sector |
| to beginning |
| of element.</p></td> |
| </tr> |
| <tr class="row-even"><td><p>fe_data_ |
| off</p></td> |
| <td><p>Byte offset |
| from start of |
| the sector to |
| beginning of |
| element data. |
| Pass this to |
| to |
| flash_area_x |
| x() |
| routines.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>fe_data_ |
| len</p></td> |
| <td><p>Number of |
| bytes in the |
| element.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <p>The following data structure describes the FCB itself. First part should |
| be filled in by the user before calling fcb_init(). The second part is |
| used by FCB for its internal bookkeeping.</p> |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="k">struct</span><span class="w"> </span><span class="nc">fcb</span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="cm">/* Caller of fcb_init fills this in */</span> |
| <span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">f_magic</span><span class="p">;</span><span class="w"> </span><span class="cm">/* As placed on the disk */</span> |
| <span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">f_version</span><span class="p">;</span><span class="w"> </span><span class="cm">/* Current version number of the data */</span> |
| <span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">f_sector_cnt</span><span class="p">;</span><span class="w"> </span><span class="cm">/* Number of elements in sector array */</span> |
| <span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">f_scratch_cnt</span><span class="p">;</span><span class="w"> </span><span class="cm">/* How many sectors should be kept empty */</span> |
| <span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">flash_area</span><span class="w"> </span><span class="o">*</span><span class="n">f_sectors</span><span class="p">;</span><span class="w"> </span><span class="cm">/* Array of sectors, must be contiguous */</span> |
| |
| <span class="w"> </span><span class="cm">/* Flash circular buffer internal state */</span> |
| <span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">os_mutex</span><span class="w"> </span><span class="n">f_mtx</span><span class="p">;</span><span class="w"> </span><span class="cm">/* Locking for accessing the FCB data */</span> |
| <span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">flash_area</span><span class="w"> </span><span class="o">*</span><span class="n">f_oldest</span><span class="p">;</span> |
| <span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">fcb_entry</span><span class="w"> </span><span class="n">f_active</span><span class="p">;</span> |
| <span class="w"> </span><span class="kt">uint16_t</span><span class="w"> </span><span class="n">f_active_id</span><span class="p">;</span> |
| <span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">f_align</span><span class="p">;</span><span class="w"> </span><span class="cm">/* writes to flash have to aligned to this */</span> |
| <span class="p">};</span> |
| </pre></div> |
| </div> |
| <table class="docutils align-default"> |
| <colgroup> |
| <col style="width: 43%" /> |
| <col style="width: 57%" /> |
| </colgroup> |
| <thead> |
| <tr class="row-odd"><th class="head"><p>Element</p></th> |
| <th class="head"><p>Description</p></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="row-even"><td><p>f_magic</p></td> |
| <td><p>Magic number |
| in the |
| beginning of |
| FCB flash |
| sector. FCB |
| uses this when |
| determining |
| whether sector |
| contains valid |
| data or not.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>f_version</p></td> |
| <td><p>Current |
| version number |
| of the data. |
| Also stored in |
| flash sector |
| header.</p></td> |
| </tr> |
| <tr class="row-even"><td><p>f_sector_cnt</p></td> |
| <td><p>Number of |
| elements in |
| the f_sectors |
| array.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>f_scratch |
| _cnt</p></td> |
| <td><p>Number of |
| sectors to |
| keep empty. |
| This can be |
| used if you |
| need to have |
| scratch space |
| for garbage |
| collecting |
| when FCB fills |
| up.</p></td> |
| </tr> |
| <tr class="row-even"><td><p>f_sectors</p></td> |
| <td><p>Array of |
| entries |
| describing |
| flash sectors |
| to use.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>f_mtx</p></td> |
| <td><p>Lock |
| protecting |
| access to FCBs |
| internal data.</p></td> |
| </tr> |
| <tr class="row-even"><td><p>f_oldest</p></td> |
| <td><p>Pointer to |
| flash sector |
| containing the |
| oldest data. |
| This is where |
| data is served |
| when read is |
| started.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>f_active</p></td> |
| <td><p>Flash location |
| where the |
| newest data |
| is. This is |
| used by |
| fcb_append() |
| to figure out |
| where the data |
| should go to.</p></td> |
| </tr> |
| <tr class="row-even"><td><p>f_active_id</p></td> |
| <td><p>Flash sectors |
| are assigned |
| ever-increasin |
| g |
| serial |
| numbers. This |
| is how FCB |
| figures out |
| where oldest |
| data is on |
| system |
| restart.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>f_align</p></td> |
| <td><p>Some flashes |
| have |
| restrictions |
| on alignment |
| for writes. |
| FCB keeps a |
| copy of this |
| number for the |
| flash here.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section" id="api"> |
| <h2><a class="toc-backref" href="#id4">API</a><a class="headerlink" href="#api" title="Permalink to this headline">¶</a></h2> |
| <dl class="c type"> |
| <dt id="c.fcb_walk_cb"> |
| <span class="target" id="group___f_c_b_1gaa5b10380f15d7cd339ef4bab1ee8869b"></span><em class="property"><span class="pre">typedef</span> </em><span class="pre">int</span> <span class="pre">(</span><span class="pre">*</span><code class="sig-name descname"><span class="pre">fcb_walk_cb</span></code><span class="pre">)</span><span class="sig-paren">(</span><em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb_entry" title="fcb_entry"><span class="pre">fcb_entry</span></a> <span class="pre">*</span><span class="pre">loc</span>, <span class="pre">void</span> <span class="pre">*</span><span class="pre">arg</span><span class="sig-paren">)</span><a class="headerlink" href="#c.fcb_walk_cb" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Walk over all entries in FCB. </p> |
| <p>cb gets called for every entry. If cb wants to stop the walk, it should return non-zero value.</p> |
| <p>Entry data can be read using flash_area_read(), using loc->fe_area, loc->fe_data_off, and loc->fe_data_len as arguments. </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.fcb_init"> |
| <span class="target" id="group___f_c_b_1gaca464dc27ceff4033505b08273e86165"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">fcb_init</span></code><span class="sig-paren">(</span><em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb_init" title="fcb"><span class="pre">fcb</span></a> <span class="pre">*</span><em><span class="pre">fcb</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.fcb_init" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.fcb_append"> |
| <span class="target" id="group___f_c_b_1ga50cf034bf22db571855664d0043b6bed"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">fcb_append</span></code><span class="sig-paren">(</span><em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb" title="fcb"><span class="pre">fcb</span></a><span class="pre">*</span>, <span class="pre">uint16_t</span> <em><span class="pre">len</span></em>, <em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb_entry" title="fcb_entry"><span class="pre">fcb_entry</span></a> <span class="pre">*</span><em><span class="pre">loc</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.fcb_append" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p><a class="reference internal" href="#group___f_c_b_1ga50cf034bf22db571855664d0043b6bed"><span class="std std-ref">fcb_append()</span></a> appends an entry to circular buffer. </p> |
| <p>When writing the contents for the entry, use loc->fl_area and loc->fl_data_off with flash_area_write(). When you’re finished, call <a class="reference internal" href="#group___f_c_b_1ga305609965a81896243492751f0a2bcf9"><span class="std std-ref">fcb_append_finish()</span></a> with loc as argument. </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.fcb_append_finish"> |
| <span class="target" id="group___f_c_b_1ga305609965a81896243492751f0a2bcf9"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">fcb_append_finish</span></code><span class="sig-paren">(</span><em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb" title="fcb"><span class="pre">fcb</span></a><span class="pre">*</span>, <em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb_entry" title="fcb_entry"><span class="pre">fcb_entry</span></a> <span class="pre">*</span><em><span class="pre">append_loc</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.fcb_append_finish" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.fcb_walk"> |
| <span class="target" id="group___f_c_b_1gaec1b7a8b950dbfec1b0fec62b31592a3"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">fcb_walk</span></code><span class="sig-paren">(</span><em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb" title="fcb"><span class="pre">fcb</span></a><span class="pre">*</span>, <em class="property"><span class="pre">struct</span></em> <span class="pre">flash_area</span><span class="pre">*</span>, <a class="reference internal" href="#c.fcb_walk_cb" title="fcb_walk_cb"><span class="pre">fcb_walk_cb</span></a> <em><span class="pre">cb</span></em>, <span class="pre">void</span> <span class="pre">*</span><em><span class="pre">cb_arg</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.fcb_walk" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.fcb_getnext"> |
| <span class="target" id="group___f_c_b_1ga98129247e1f0a26313345067dc3776d0"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">fcb_getnext</span></code><span class="sig-paren">(</span><em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb" title="fcb"><span class="pre">fcb</span></a><span class="pre">*</span>, <em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb_entry" title="fcb_entry"><span class="pre">fcb_entry</span></a> <span class="pre">*</span><em><span class="pre">loc</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.fcb_getnext" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.fcb_rotate"> |
| <span class="target" id="group___f_c_b_1ga47d0b2d120f101a82dc2eb9e712006c5"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">fcb_rotate</span></code><span class="sig-paren">(</span><em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb" title="fcb"><span class="pre">fcb</span></a><span class="pre">*</span><span class="sig-paren">)</span><a class="headerlink" href="#c.fcb_rotate" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Erases the data from oldest sector. </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.fcb_append_to_scratch"> |
| <span class="target" id="group___f_c_b_1ga150beafa3be414576a236fbfbdf25356"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">fcb_append_to_scratch</span></code><span class="sig-paren">(</span><em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb" title="fcb"><span class="pre">fcb</span></a><span class="pre">*</span><span class="sig-paren">)</span><a class="headerlink" href="#c.fcb_append_to_scratch" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Start using the scratch block. </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.fcb_free_sector_cnt"> |
| <span class="target" id="group___f_c_b_1ga2dec5f90b687466997eb25be43448daa"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">fcb_free_sector_cnt</span></code><span class="sig-paren">(</span><em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb_free_sector_cnt" title="fcb"><span class="pre">fcb</span></a> <span class="pre">*</span><em><span class="pre">fcb</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.fcb_free_sector_cnt" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>How many sectors are unused. </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.fcb_is_empty"> |
| <span class="target" id="group___f_c_b_1ga76d29d337d5e457f065ed897297ba6cb"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">fcb_is_empty</span></code><span class="sig-paren">(</span><em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb_is_empty" title="fcb"><span class="pre">fcb</span></a> <span class="pre">*</span><em><span class="pre">fcb</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.fcb_is_empty" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Whether FCB has any data. </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.fcb_offset_last_n"> |
| <span class="target" id="group___f_c_b_1gacf4b86d660b7f3a3b73477defd86590c"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">fcb_offset_last_n</span></code><span class="sig-paren">(</span><em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb_offset_last_n" title="fcb"><span class="pre">fcb</span></a> <span class="pre">*</span><em><span class="pre">fcb</span></em>, <span class="pre">uint8_t</span> <em><span class="pre">entries</span></em>, <em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb_entry" title="fcb_entry"><span class="pre">fcb_entry</span></a> <span class="pre">*</span><em><span class="pre">last_n_entry</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.fcb_offset_last_n" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Element at offset <em>entries</em> from last position (backwards). </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.fcb_clear"> |
| <span class="target" id="group___f_c_b_1gab3d5c09980af72f0de1692682c8dfef1"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">fcb_clear</span></code><span class="sig-paren">(</span><em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb_clear" title="fcb"><span class="pre">fcb</span></a> <span class="pre">*</span><em><span class="pre">fcb</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.fcb_clear" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Clears FCB passed to it. </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.fcb_area_info"> |
| <span class="target" id="group___f_c_b_1ga537ad86e219488d94427a661df947a38"></span><span class="pre">int</span> <code class="sig-name descname"><span class="pre">fcb_area_info</span></code><span class="sig-paren">(</span><em class="property"><span class="pre">struct</span></em> <a class="reference internal" href="#c.fcb_area_info" title="fcb"><span class="pre">fcb</span></a> <span class="pre">*</span><em><span class="pre">fcb</span></em>, <em class="property"><span class="pre">struct</span></em> <span class="pre">flash_area</span> <span class="pre">*</span><em><span class="pre">fa</span></em>, <span class="pre">int</span> <span class="pre">*</span><em><span class="pre">elemsp</span></em>, <span class="pre">int</span> <span class="pre">*</span><em><span class="pre">bytesp</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.fcb_area_info" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Usage report for a given FCB area. </p> |
| <p>Returns number of elements and the number of bytes stored in them. </p> |
| </dd></dl> |
| |
| <dl class="c macro"> |
| <dt id="c.FCB_MAX_LEN"> |
| <span class="target" id="group___f_c_b_1gaccabb1cb7f83c0d8919571cf3de7ee47"></span><code class="sig-name descname"><span class="pre">FCB_MAX_LEN</span></code><a class="headerlink" href="#c.FCB_MAX_LEN" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c macro"> |
| <dt id="c.FCB_OK"> |
| <span class="target" id="group___f_c_b_1ga739a2dd44516b9d25d2bd36a3e9a1ced"></span><code class="sig-name descname"><span class="pre">FCB_OK</span></code><a class="headerlink" href="#c.FCB_OK" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Error codes. </p> |
| </dd></dl> |
| |
| <dl class="c macro"> |
| <dt id="c.FCB_ERR_ARGS"> |
| <span class="target" id="group___f_c_b_1ga3ade25493981aedb4cb47364e142506a"></span><code class="sig-name descname"><span class="pre">FCB_ERR_ARGS</span></code><a class="headerlink" href="#c.FCB_ERR_ARGS" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c macro"> |
| <dt id="c.FCB_ERR_FLASH"> |
| <span class="target" id="group___f_c_b_1gaab70b4f6510d4e25795342340ebaaf1a"></span><code class="sig-name descname"><span class="pre">FCB_ERR_FLASH</span></code><a class="headerlink" href="#c.FCB_ERR_FLASH" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c macro"> |
| <dt id="c.FCB_ERR_NOVAR"> |
| <span class="target" id="group___f_c_b_1ga8ef0ddd5218f7d3d266a1a522f5f118a"></span><code class="sig-name descname"><span class="pre">FCB_ERR_NOVAR</span></code><a class="headerlink" href="#c.FCB_ERR_NOVAR" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c macro"> |
| <dt id="c.FCB_ERR_NOSPACE"> |
| <span class="target" id="group___f_c_b_1gaeda9a197227518600f3c559738f90f0b"></span><code class="sig-name descname"><span class="pre">FCB_ERR_NOSPACE</span></code><a class="headerlink" href="#c.FCB_ERR_NOSPACE" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c macro"> |
| <dt id="c.FCB_ERR_NOMEM"> |
| <span class="target" id="group___f_c_b_1gad5ac56f5f9a67b46c65f2fade0c21b97"></span><code class="sig-name descname"><span class="pre">FCB_ERR_NOMEM</span></code><a class="headerlink" href="#c.FCB_ERR_NOMEM" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c macro"> |
| <dt id="c.FCB_ERR_CRC"> |
| <span class="target" id="group___f_c_b_1ga16da332cd464586e9193face6bc3227e"></span><code class="sig-name descname"><span class="pre">FCB_ERR_CRC</span></code><a class="headerlink" href="#c.FCB_ERR_CRC" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c macro"> |
| <dt id="c.FCB_ERR_MAGIC"> |
| <span class="target" id="group___f_c_b_1ga46efb14fbda927e4b400c35255111b1c"></span><code class="sig-name descname"><span class="pre">FCB_ERR_MAGIC</span></code><a class="headerlink" href="#c.FCB_ERR_MAGIC" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c macro"> |
| <dt id="c.FCB_ERR_VERSION"> |
| <span class="target" id="group___f_c_b_1gab57024b8ae61f7b69c7a52c07591395c"></span><code class="sig-name descname"><span class="pre">FCB_ERR_VERSION</span></code><a class="headerlink" href="#c.FCB_ERR_VERSION" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c macro"> |
| <dt id="c.FCB_ERR_NEXT_SECT"> |
| <span class="target" id="group___f_c_b_1gad08d237c1777f4922d717bbde5244402"></span><code class="sig-name descname"><span class="pre">FCB_ERR_NEXT_SECT</span></code><a class="headerlink" href="#c.FCB_ERR_NEXT_SECT" title="Permalink to this definition">¶</a><br /></dt> |
| <dd></dd></dl> |
| |
| <dl class="c struct"> |
| <dt id="c.fcb_entry"> |
| <span class="target" id="structfcb__entry"></span><em class="property"><span class="pre">struct</span> </em><code class="sig-name descname"><span class="pre">fcb_entry</span></code><a class="headerlink" href="#c.fcb_entry" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><em>#include <fcb.h></em><p>Entry location is pointer to area (within fcb->f_sectors), and offset within that area. </p> |
| </dd></dl> |
| |
| <dl class="c struct"> |
| <dt id="c.fcb"> |
| <span class="target" id="structfcb"></span><em class="property"><span class="pre">struct</span> </em><code class="sig-name descname"><span class="pre">fcb</span></code><a class="headerlink" href="#c.fcb" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><em>#include <fcb.h></em></dd></dl> |
| |
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