Changes between Version 12 and Version 13 of Developer/FileSystems


Ignore:
Timestamp:
Sep 13, 2008, 6:10:02 AM (11 years ago)
Author:
ChrisJohns
Comment:

Add SPI SD Card

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  • Developer/FileSystems

    v12 v13  
    9393# Non-volatile Disk
    9494# Flash Disk
     95# SPI SD Card
    9596
    9697Block devices are normally accessed using the block device cache.
     
    115116
    116117The Flash disk driver or FDISK driver maps a block disk device to flash devices. You can specify the devices and how much of each device to use when creating a disk. The driver will manage the flash sectors/segments and handle the mapping of the disk blocks to the flash devices. The types of flash supported is independent of the flash driver. You define device descriptions the flash driver uses. The flash driver is not a flash file system, rather it is a way to map an existing block device file system to flash devices. Currently the flash driver does not support NOR flash devices and does not journal blocks written to the disk. This means you need to manage power failures. Journaling support could be added in the future and if you are interested in supporting this please contact OAR Corp.
     118= SPI SD Card =
     119
     120
     121The SPI SD Card driver is locate in libchip. It uses libi2c despite its name supports I2C and SPI serial bus interfaces.
    117122= Block Device Cache =
    118123