You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
32 lines
880 B
ReStructuredText
32 lines
880 B
ReStructuredText
4 years ago
|
SD/MMC/SDIO
|
||
|
|
===========
|
||
|
|
|
||
|
|
The SD/MMC stack supports SD/MMC memory card and SDIO card.
|
||
|
|
|
||
|
|
The stack should be initialized with right HAL instance. Then sd_mmc_check is
|
||
|
|
be used to detect and mount the card. When the card is ready, the block
|
||
|
|
read/write functions are used to access the data on card. Note that the
|
||
|
|
read/write functions split the read/write process to init/start/wait_end, so
|
||
|
|
that user has chance to control the whole data process to remove overheads.
|
||
|
|
Note if used MCI OS driver version,the operation for SD/MMC should be in os task.
|
||
|
|
|
||
|
|
Features
|
||
|
|
--------
|
||
|
|
|
||
|
|
* Card initialization
|
||
|
|
* Card detection and protection detection
|
||
|
|
* Card type and capacity check
|
||
|
|
* Card mount/unmount
|
||
|
|
* Card read/write
|
||
|
|
|
||
|
|
Dependencies
|
||
|
|
------------
|
||
|
|
|
||
|
|
* Peripheral that supports multimedia card interface (MCI)
|
||
|
|
|
||
|
|
Limitations
|
||
|
|
-----------
|
||
|
|
|
||
|
|
* No SPI interface support yet
|
||
|
|
* Support only one peripheral instance
|