doc: Update embedded flash documentation.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@4547 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/bertos/drv/flash.h b/bertos/drv/flash.h
index f07980e9dc4d0b3c2e9a865cafce7d7c1935969b..f00926ae59ff0560b353c2045033145cb12d9f0b 100644 (file)
--- a/bertos/drv/flash.h
+++ b/bertos/drv/flash.h
@@ -33,6 +33,26 @@
 * \addtogroup drv_emb_flash
 * \brief Embedded flash for cpu.
 *
+* This module allows to access in reading and writing to the internal
+* flash memory of the micro. It is a block device, so it must be
+* accessed using the KBlock interface functions (see kblock.h).
+*
+* Once you have opened the flash for writing, you may want to use
+* kblock_trim() to avoid overwriting data on other flash banks.
+*
+* Example usage:
+* \code
+* Flash fls;
+* flash_init(&fls.blk, 0);
+* // enable access only on desired blocks
+* // start block = 50, num blocks = 20
+* kblock_trim(&fls, 50, 20);
+* // ...
+* // now write to the flash
+* // block number is automatically converted
+* kblock_write(&fls.blk, 0, buf, 0, 128);
+* \endcode
+*
 * \author Francesco Sacchi <batt@develer.com>
 * \author Daniele Basile <asterix@develer.com>
 *
@@ -96,7 +116,7 @@ struct FlashHardware;
  */
 typedef struct Flash
 {
-       KBlock blk;
+       KBlock blk;                  ///< KBlock context
        struct FlashHardware *hw;
        #if !CONFIG_FLASH_DISABLE_OLD_API
        union {
@@ -106,7 +126,7 @@ typedef struct Flash
        #endif /* !CONFIG_FLASH_DISABLE_OLD_API */
 } Flash;
 
-/**
+/*
  * ID for FLASH
  */
 #define KBT_FLASH MAKE_ID('F', 'L', 'A', 'S')