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- <title>FatFs - disk_read</title>
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- <div class="para">
- <h2>disk_read</h2>
- <p>The disk_read function reads sector(s) from the disk drive.</p>
- <pre>
- DRESULT disk_read (
- BYTE <em>Drive</em>, /* Physical drive number */
- BYTE* <em>Buffer</em>, /* Pointer to the read data buffer */
- DWORD <em>SectorNumber</em>, /* Start sector number */
- BYTE <em>SectorCount</em> /* Number of sectros to read */
- );
- </pre>
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- <div class="para">
- <h4>Parameters</h4>
- <dl class="par">
- <dt>Drive</dt>
- <dd>Specifies the physical drive number.</dd>
- <dt>Buffer</dt>
- <dd>Pointer to the read buffer to store the read data. The buffer size of number of bytes to be read is required.</dd>
- <dt>SectorNumber</dt>
- <dd>Specifies the start sector number in logical block address (LBA).</dd>
- <dt>SectorCount</dt>
- <dd>Specifies number of sectors to read. The value can be 1 to 255.</dd>
- </dl>
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- <div class="para">
- <h4>Return Value</h4>
- <dl class="ret">
- <dt>RES_OK (0)</dt>
- <dd>The function succeeded.</dd>
- <dt>RES_ERROR</dt>
- <dd>Any hard error occured during the read operation and could not recover it.</dd>
- <dt>RES_PARERR</dt>
- <dd>Invalid parameter.</dd>
- <dt>RES_NOTRDY</dt>
- <dd>The disk drive has not been initialized.</dd>
- </dl>
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