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

SAM4E-EK: NSH configuration now has DMA-based SPI and AT25 Serial FLASH suported enabled by default

Browse Source
This commit is contained in:
Gregory Nutt 2014-03-14 12:35:17 -06:00
parent bda62b0502
commit 4d34848389
3 changed files with 146 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
ChangeLog
View File

@ -6998,4 +6998,6 @@
HSMCI block driver (2014-3-13).
* arch/arm/src/sam34/sam_dmac.c and sam_spi.c: Fixes to DMA in general
and to SPI in particular (2014-3-14).
* configs/sam4e-ek/nsh: DMA-based SPI and a FAT file system on the
AT25 Serial FLASH are now supported by default in the NSH configuration
(2014-3-14).

99
configs/sam4e-ek/README.txt
View File

@ -20,6 +20,7 @@ Contents
- LEDs
- Serial Console
- Networking Support
- AT25 Serial FLASH
- SAM4E-EK-specific Configuration Options
- Configurations
@ -343,8 +344,8 @@ Serial Console
By default serial console is configured for 115000, 8-bit, 1 stop bit, and
no parity.
Networking
==========
Networking Support
==================
Networking support via the can be added to NSH by selecting the following
configuration options.
@ -502,6 +503,89 @@ Networking
a network because additional time will be required to fail with timeout
errors.
AT25 Serial FLASH
=================
Connections
-----------
Both the SAM4E-EK include an Atmel AT25DF321A, 32-megabit, 2.7-volt
SPI serial flash. The SPI
connection is as follows:
------ ------- ---------------
SAM4E AT25 SAM4E
GPIO PIN FUNCTION
------ ------- ---------------
PA13 SI MOSI
PA12 SO MIS0
PA14 SCK SPCK
PA5 /CS NPCS3 (pulled high externally)
------ ------- ---------------
Configuration
-------------
Support for the serial FLASH can be enabled in these configurations. These
are the relevant configuration settings. These settings (1) Enable SPI0,
(2) Enable DMAC0 to support DMA transfers on SPI for best performance,
(3) Enable the AT25 Serial FLASH, and (3) Set up NuttX to configure the
file system on the AT25 FLASH:
System Type -> ATSAM3/4 Peripheral Support
CONFIG_SAM34_SPI0=y : Enable SPI0
CONFIG_SAM34_DMAC0=y : Enable DMA controller 0
System Type -> SPI device driver options
CONFIG_SAM34_SPI_DMA=y : Use DMA for SPI transfers
CONFIG_SAM34_SPI_DMATHRESHOLD=4 : Don't DMA for small transfers
Device Drivers -> SPI Driver Support
CONFIG_SPI=y : Enable SPI support
CONFIG_SPI_EXCHANGE=y : Support the exchange method
Device Drivers -> Memory Technology Device (MTD) Support
CONFIG_MTD=y : Enable MTD support
CONFIG_MTD_AT25=y : Enable the AT25 driver
CONFIG_AT25_SPIMODE=0 : Use SPI mode 0
CONFIG_AT25_SPIFREQUENCY=20000000 : Use SPI frequency 12MHz
The AT25 is capable of operation at 20MHz. However, if you experience
any issues with the AT25, then lower this frequency may give more
predictable performance.
File Systems -> FAT
CONFIG_FS_FAT=y : Enable and configure FAT
CONFIG_FAT_LCNAMES=y : Upper/lower case names
CONFIG_FAT_LFN=y : Long file name support (See NOTE)
CONFIG_FAT_MAXFNAME=32 : Limit filename sizes to 32 bytes
NOTE: Use care if you plan to use FAT long file name feature in a product;
There are issues with certain Microsoft patents on the long file name
technology.
Application Configuration -> NSH Library
CONFIG_NSH_ARCHINIT=y : NSH board-initialization
Board Selection
CONFIG_SAM4EEK_AT25_AUTOMOUNT=y : Mounts AT25 for NSH
CONFIG_SAM4EEK_AT25_FTL=y : Create block driver for FAT
You can then format the AT25 FLASH for a FAT file system and mount the
file system at /mnt/at25 using these NSH commands:
nsh> mkfatfs /dev/mtdblock0
nsh> mount -t vfat /dev/mtdblock0 /mnt/at25
Then you an use the FLASH as a normal FAT file system:
nsh> echo "This is a test" >/mnt/at25/atest.txt
nsh> ls -l /mnt/at25
/mnt/at25:
-rw-rw-rw- 16 atest.txt
nsh> cat /mnt/at25/atest.txt
This is a test
SAM4E-EK-specific Configuration Options
=======================================
@ -793,7 +877,12 @@ Configurations
CONFIG_NSH_DHCPC=y : Tells NSH to use DHCPC, not
: the fixed addresses
4. This configuration has been used for verifying the touchscreen on
4. This configuration has the DMA-based SPI0 and AT25 Serial FLASH
support enabled by default. This can be easily disabled or
reconfigured (See see the configuration settings and usage notes
above in the section entitled "AT25 Serial FLASH").
5. This configuration has been used for verifying the touchscreen on
on the SAM4E-EK LCD. With these modifications, you can include the
touchscreen test program at apps/examples/touchscreen as an NSH built-in
application. You can enable the touchscreen and test by modifying the
@ -837,7 +926,7 @@ Configurations
CONFIG_DEBUG_VERBOSE=y : Enable verbose debug output
CONFIG_DEBUG_INPUT=y : Enable debug output from input devices
4. Enabling HSMCI support. The SAM3U-KE provides a an SD memory card
6. Enabling HSMCI support. The SAM3U-KE provides a an SD memory card
slot. Support for the SD slot can be enabled with the following
settings:
@ -868,3 +957,5 @@ Configurations
has been verified. HSMCI and touchscreen have not been tested (the
above notes came from the SAM3U-EK and have not been yet been tested
on the SAM4E-EK).
2014-3-14: The DMA-based SPI appears to be functional and can be used
to support a FAT file system on the AT25 Serial FLASH.

55
configs/sam4e-ek/nsh/defconfig
View File

@ -188,7 +188,8 @@ CONFIG_ARCH_CHIP_SAM4E=y
# CONFIG_SAM34_CMCC is not set
# CONFIG_SAM34_DACC is not set
# CONFIG_SAM34_EIC is not set
# CONFIG_SAM34_DMAC0 is not set
CONFIG_SAM34_DMAC0=y
# CONFIG_SAM34_DMAC1 is not set
CONFIG_SAM34_EMAC=y
# CONFIG_SAM34_HSMCI is not set
# CONFIG_SAM34_NAND is not set
@ -197,7 +198,7 @@ CONFIG_SAM34_EMAC=y
# CONFIG_SAM34_RTC is not set
# CONFIG_SAM34_RTT is not set
# CONFIG_SAM34_SMC is not set
# CONFIG_SAM34_SPI0 is not set
CONFIG_SAM34_SPI0=y
# CONFIG_SAM34_TC0 is not set
# CONFIG_SAM34_TC1 is not set
# CONFIG_SAM34_TC2 is not set
@ -230,6 +231,12 @@ CONFIG_SAM34_USART1=y
# AT91SAM3/4 GPIO Interrupt Configuration
#
#
# AT91SAM3/4 SPI device driver options
#
CONFIG_SAM34_SPI_DMA=y
CONFIG_SAM34_SPI_DMATHRESHOLD=4
#
# AT91SAM3/4 EMAC device driver options
#
@ -256,7 +263,7 @@ CONFIG_SAM34_EMAC_ISETH0=y
#
# CONFIG_ARCH_NOINTC is not set
# CONFIG_ARCH_VECNOTIRQ is not set
# CONFIG_ARCH_DMA is not set
CONFIG_ARCH_DMA=y
CONFIG_ARCH_HAVE_IRQPRIO=y
# CONFIG_CUSTOM_STACK is not set
# CONFIG_ADDRENV is not set
@ -325,6 +332,8 @@ CONFIG_NSH_MMCSDMINOR=0
#
CONFIG_SAM4EEK_96MHZ=y
# CONFIG_SAM4EEK_120MHZ is not set
CONFIG_SAM4EEK_AT25_AUTOMOUNT=y
CONFIG_SAM4EEK_AT25_FTL=y
#
# RTOS Features
@ -404,7 +413,11 @@ CONFIG_DEV_NULL=y
# CONFIG_PWM is not set
# CONFIG_ARCH_HAVE_I2CRESET is not set
# CONFIG_I2C is not set
# CONFIG_SPI is not set
CONFIG_SPI=y
# CONFIG_SPI_OWNBUS is not set
CONFIG_SPI_EXCHANGE=y
# CONFIG_SPI_CMDDATA is not set
# CONFIG_SPI_BITBANG is not set
# CONFIG_I2S is not set
# CONFIG_RTC is not set
# CONFIG_WATCHDOG is not set
@ -415,7 +428,33 @@ CONFIG_DEV_NULL=y
# CONFIG_INPUT is not set
# CONFIG_LCD is not set
# CONFIG_MMCSD is not set
# CONFIG_MTD is not set
CONFIG_MTD=y
#
# MTD Configuration
#
# CONFIG_MTD_PARTITION is not set
# CONFIG_MTD_BYTE_WRITE is not set
# CONFIG_MTD_CONFIG is not set
# CONFIG_MTD_CONFIG_RAM_CONSOLIDATE is not set
#
# MTD Device Drivers
#
# CONFIG_MTD_NAND is not set
# CONFIG_RAMMTD is not set
# CONFIG_MTD_AT24XX is not set
CONFIG_MTD_AT25=y
CONFIG_AT25_SPIMODE=0
CONFIG_AT25_SPIFREQUENCY=20000000
# CONFIG_MTD_AT45DB is not set
# CONFIG_MTD_M25P is not set
# CONFIG_MTD_SMART is not set
# CONFIG_MTD_RAMTRON is not set
# CONFIG_MTD_SST25 is not set
# CONFIG_MTD_SST25XX is not set
# CONFIG_MTD_SST39FV is not set
# CONFIG_MTD_W25 is not set
CONFIG_NETDEVICES=y
#
@ -584,8 +623,9 @@ CONFIG_FS_READABLE=y
CONFIG_FS_WRITABLE=y
# CONFIG_FS_RAMMAP is not set
CONFIG_FS_FAT=y
# CONFIG_FAT_LCNAMES is not set
# CONFIG_FAT_LFN is not set
CONFIG_FAT_LCNAMES=y
CONFIG_FAT_LFN=y
CONFIG_FAT_MAXFNAME=32
# CONFIG_FS_FATTIME is not set
# CONFIG_FAT_DMAMEMORY is not set
# CONFIG_NFS is not set
@ -918,6 +958,7 @@ CONFIG_NSH_MAX_ROUNDTRIP=20
#
# FLASH Erase-all Command
#
# CONFIG_SYSTEM_FLASH_ERASEALL is not set
#
# NxPlayer media player library / command Line