sergiotarxz/nuttx
sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

MMC/SD driver needs to manage SPI mode and data width as well

Browse Source
This commit is contained in:
Gregory Nutt 2013-06-17 12:31:24 -06:00
parent a168132901
commit 7a9d4058f5
2 changed files with 29 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
configs/sam3u-ek/README.txt
View File

@ -615,21 +615,12 @@ Configuration sub-directories
perform good measurements but I am not getting the /PENIRQ
interrupt. The interrupt is set up correctly (I can ground
A24 and I get the interrupt), so apparently the ADS7843E is
not generating interrupts.
not generating interrupts. No idea why.
nx:
Configures to use examples/nx using the HX834x LCD hardware on
the SAM3U-EK development board.
STATUS:
This configuration used to work well in an older NuttX version
on an older SAM3U-EK board (my old board was bricked and I got
another after a lapse of a couple of years). But now it no
longer works! There appears to be some bug, perhaps a memory
clobbering bug, that causes a variety of symptons: Hangs on
UART0 or hard faults. The LCD functionality is basically intact,
but not usable because of these problems.
ostest:
This configuration directory, performs a simple OS test using
examples/ostest. By default, this project assumes that you are

42
configs/sam4l-xplained/README.txt
View File

@ -697,6 +697,19 @@ Configuration sub-directories
System Type -> Peripherals:
CONFIG_SAM34_SPI=y : Enable the SAM4L SPI peripheral
Device Drivers
CONFIG_SPI=y : Enable SPI support
CONFIG_SPI_EXCHANGE=y : The exchange() method is supported
CONFIG_SPI_OWNBUS=y : Smaller code if this is the only SPI device
CONFIG_MMCSD=y : Enable MMC/SD support
CONFIG_MMCSD_NSLOTS=1 : Only one MMC/SD card slot
CONFIG_MMCSD_MULTIBLOCK_DISABLE=n : Should not need to disable multi-block transfers
CONFIG_MMCSD_HAVECARDDETECT=y : I/O1 module as a card detect GPIO
CONFIG_MMCSD_SPI=y : Use the SPI interface to the MMC/SD card
CONFIG_MMCSD_SPICLOCK=20000000 : This is a guess for the optimal MMC/SD frequency
CONFIG_MMCSD_SPIMODE=0 : Mode 0 is required
Board Selection -> Common Board Options
CONFIG_NSH_MMCSDSLOTNO=0 : Only one MMC/SD slot, slot 0
CONFIG_NSH_MMCSDSPIPORTNO=0 : Use CS=0 if the I/O1 is in EXT1, OR
@ -707,18 +720,6 @@ Configuration sub-directories
CONFIG_SAM4L_XPLAINED_IOMODULE_EXT1=y : In EXT1, or EXT2
CONFIG_SAM4L_XPLAINED_IOMODULE_EXT2=y
Device Drivers
CONFIG_SPI=y : Enable SPI support
CONFIG_SPI_EXCHANGE=y : The exchange() method is supported
CONFIG_SPI_OWNBUS=y : Smaller code if this is the only SPI device
CONFIG_MMCSD=y : Enable MMC/SD support
CONFIG_MMCSD_NSLOTS=1 : Only one MMC/SD card slot
CONFIG_MMCSD_MULTIBLOCK_DISABLE=y : I tested this way, but this may not be required
CONFIG_MMCSD_HAVECARDDETECT=y : I/O1 module as a card detect GPIO
CONFIG_MMCSD_SPI=y : Use the SPI interface to the MMC/SD card
CONFIG_MMCSD_SPICLOCK=20000000 : This is a guess for the optimal MMC/SD frequency
Application Configuration -> NSH Library
CONFIG_NSH_ARCHINIT=y : Board has architecture-specific initialization
@ -728,5 +729,18 @@ Configuration sub-directories
behave very well (since its outgoing prompts also appear as incoming
commands).
STATUS: As of 2013-6-16, the SPI interface is not communicating with
the SD card.
NOTE: If you get a compilation error like:
libxx_new.cxx:74:40: error: 'operator new' takes type 'size_t'
('unsigned int') as first parameter [-fper
Sometimes NuttX and your toolchain will disagree on the underlying
type of size_t; sometimes it is an 'unsigned int' and sometimes it is
an 'unsigned long int'. If this error occurs, then you may need to
toggle the value of CONFIG_CXX_NEWLONG.
STATUS: As of 2013-6-16, the microSD slot on the I/O1 is not working.
This could be an SPI communication issues, but it appears more like
a card interfacing problems. The card does make some appropriate
responses but also reports some other issues (erase reset) and will
not exit IDLE most.