📄 ecos-flash-v2-dev.html
字号:
<!-- Copyright (C) 2009 Free Software Foundation, Inc. -->
<!-- This material may be distributed only subject to the terms -->
<!-- and conditions set forth in the Open Publication License, v1.0 -->
<!-- or later (the latest version is presently available at -->
<!-- http://www.opencontent.org/openpub/). -->
<!-- Distribution of the work or derivative of the work in any -->
<!-- standard (paper) book form is prohibited unless prior -->
<!-- permission is obtained from the copyright holder. -->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>FLASH device API</TITLE
><meta name="MSSmartTagsPreventParsing" content="TRUE">
<META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="eCos Reference Manual"
HREF="ecos-ref.html"><LINK
REL="UP"
TITLE="The Version 2 eCos FLASH API"
HREF="ecos-flash-v2.html"><LINK
REL="PREVIOUS"
TITLE="The Version 2 eCos FLASH API"
HREF="ecos-flash-v2.html"><LINK
REL="NEXT"
TITLE="The legacy Version 1 eCos FLASH API"
HREF="ecos-flash-v1.html"></HEAD
><BODY
CLASS="SECT1"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>eCos Reference Manual</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="ecos-flash-v2.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
>Chapter 27. The Version 2 eCos FLASH API</TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="ecos-flash-v1.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="ECOS-FLASH-V2-DEV"
>FLASH device API</A
></H1
><P
>This section describes the API
between the FLASH IO library the FLASH device drivers.</P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN7925"
>The FLASH device Structure</A
></H2
><P
>This structure keeps all the information about a single driver.</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>struct cyg_flash_dev {
const struct cyg_flash_dev_funs *funs; // Function pointers
cyg_uint32 flags; // Device characteristics
cyg_flashaddr_t start; // First address
cyg_flashaddr_t end; // Last address
cyg_uint32 num_block_infos; // Number of entries
const cyg_flash_block_info_t *block_info; // Info about one block size
const void *priv; // Devices private data
// The following are only written to by the FLASH IO layer.
cyg_flash_printf *pf; // Pointer to diagnostic printf
bool init; // Device has been initialised
#ifdef CYGPKG_KERNEL
cyg_mutex_t mutex; // Mutex for thread safeness
#endif
#if (CYGHWR_IO_FLASH_DEVICE > 1)
struct cyg_flash_dev *next; // Pointer to next device
#endif
};
struct cyg_flash_dev_funs {
int (*flash_init) (struct cyg_flash_dev *dev);
size_t (*flash_query) (struct cyg_flash_dev *dev, void * data, size_t len);
int (*flash_erase_block) (struct cyg_flash_dev *dev, cyg_flashaddr_t block_base);
int (*flash_program) (struct cyg_flash_dev *dev, cyg_flashaddr_t base, const void* data, size_t len);
int (*flash_read) (struct cyg_flash_dev *dev, const cyg_flashaddr_t base, void* data, size_t len);
#ifdef CYGHWR_IO_FLASH_BLOCK_LOCKING
int (*flash_block_lock) (struct cyg_flash_dev *dev, const cyg_flashaddr_t block_base);
int (*flash_block_unlock) (struct cyg_flash_dev *dev, const cyg_flashaddr_t block_base);
#endif
};</PRE
></TD
></TR
></TABLE
><P
>The FLASH IO layer will only pass requests for operations on a single block.</P
></DIV
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="ecos-flash-v2.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="ecos-ref.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="ecos-flash-v1.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>The Version 2 eCos FLASH API</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="ecos-flash-v2.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>The legacy Version 1 eCos FLASH API</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -