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EEPROM: Add a README file

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This commit is contained in:
Gregory Nutt 2014-11-27 09:14:00 -06:00
parent d8107d2b97
commit bc3212d70e
4 changed files with 19 additions and 1 deletions
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2
Documentation/README.html
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@ -260,6 +260,8 @@
| | | `- <a href="http://sourceforge.net/p/nuttx/git/ci/master/tree/nuttx/configs/zp214xpa/README.txt"><b><i>README.txt</i></b></a>
| | `- <a href="http://sourceforge.net/p/nuttx/git/ci/master/tree/nuttx/configs/README.txt"><b><i>README.txt</i></b></a>
| |- drivers/
| | |- eeprom/
| | | `- <a href="http://sourceforge.net/p/nuttx/git/ci/master/tree/nuttx/drivers/eeprom/README.txt"><b><i>README.txt</i></b></a>
| | |- lcd/
| | | `- <a href="http://sourceforge.net/p/nuttx/git/ci/master/tree/nuttx/drivers/lcd/README.txt"><b><i>README.txt</i></b></a>
| | |- mtd/

2
README.txt
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@ -1216,6 +1216,8 @@ nuttx
| | `- README.txt
| `- README.txt
|- drivers/
| |- eeprom/
| | `- README.txt
| |- lcd/
| | `- README.txt
| |- mtd/

2
drivers/eeprom/spi_xx25xx.c
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@ -33,7 +33,7 @@
*
****************************************************************************/
/* This is a driver for SPI EEPROMs that uses the same commands as the
/* This is a driver for SPI EEPROMs that use the same commands as the
* 25AA160.
*
* Write time 5ms, 6ms for 25xx1025 (determined automatically with polling)

14
drivers/mtd/README.txt
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@ -8,6 +8,20 @@ MTD README
See include/nuttx/mtd/mtd.h for additional information.
EEPROM
======
EEPROMs are a form of Memory Technology Device (MTD). EEPROMs are non-
volatile memory like FLASH, but differ in underlying memory technology and
differ in usage in many respects: They may not be organized into blocks
(at least from the standpoint of the user) and it is not necessary to
erase the EEPROM memory before re-writing it. In addition, EEPROMs tend
to be much smaller than FLASH parts, usually only a few kilobytes vs
megabytes for FLASH. EEPROM tends to be used to retain a small amount of
device configuration information; FLASH tends to be used for program or
massive data storage. For these reasons, it may not be convenient to use
the more complex MTD interface but instead use the simple character
interface provided by the EEPROM drivers. See drivers/eeprom.
NAND MEMORY
===========