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SAMV71-XULT: Enable SDRAM and the RAM test in the nsh configuration

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This commit is contained in:
Gregory Nutt 2015-04-04 19:04:54 -06:00
parent 1442c23c72
commit 08c6df12a3
2 changed files with 45 additions and 9 deletions
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42
configs/samv71-xult/README.txt
View File

@ -1110,7 +1110,9 @@ Configuration sub-directories
different U[S]ART option is selected, Audio cannot be used with
this configuration.
4. Support for the ILI8488 LCD is enabled. Only the parallel mode is
4. SDRAM is NOT enabled in this configuration.
5. Support for the ILI8488 LCD is enabled. Only the parallel mode is
supported at present. As a consequence, the maXTouch Xplained Pro
must be connected at the LCD (EXT4) connector. This mode requires:
@ -1118,9 +1120,9 @@ Configuration sub-directories
CONFIG_SAMV7_SMC=y : SMC/EBI support
CONFIG_SAMV7_XDMAC=y : XDMAC support
5. The appx/examples/nxlines is enalbed as a built-in application.
6. The appx/examples/nxlines is enabled as a built-in application.
6. When the maXTouch Xplained is connected (in any position), a new I2C
7. When the maXTouch Xplained is connected (in any position), a new I2C
address appears at address 0x4a:
nsh> i2c dev 3 77
@ -1295,13 +1297,29 @@ Configuration sub-directories
Application Configuration:
CONFIG_NSH_BUILTIN_APPS=y : Enable starting apps from NSH command line
4. SDRAM is not enabled in this configuration. I have enabled SDRAM and
the apps/examples RAM test using this configuration settings:
4. SDRAM is enabled in this configuration. Here are the relevant
configuration settings:
System Type
CONFIG_ARMV7M_ICACHE=y
CONFIG_ARMV7M_DCACHE=y
CONFIG_ARMV7M_DCACHE_WRITETHROUGH=y
The system is configured with DCACHE in write through mode. The
configuration runs with the DCACHE in write back mode, but the SDRAM
configuration fails. That is because the SDRAM initialization
occurs after the D-Cache is initialized (I have not actually tried
in write back mode, it just seems that there woulc be issues.
System Type
CONFIG_SAMV7_SDRAMC=y
CONFIG_SAMV7_SDRAMSIZE=2097152
SDRAM is not added to the heap in this configuration. To do that
you would need to set CONFIG_SAMV7_SDRAMHEAP=y and CONFIG_MM_REGIONS=2.
Instead, the SDRAM is set up so that is can be used with a destructive
RAM test enabled with this option:
Application Configuration:
CONFIG_SYSTEM_RAMTEST=y
@ -1309,7 +1327,19 @@ Configuration sub-directories
nsh> ramtest -w 70000000 2097152
STATUS: As of this writing, SDRAM does not pass the RAM test.
NuttShell (NSH) NuttX-7.8
nsh> ramtest -w 70000000 2097152
RAMTest: Marching ones: 70000000 2097152
RAMTest: Marching zeroes: 70000000 2097152
RAMTest: Pattern test: 70000000 2097152 55555555 aaaaaaaa
RAMTest: Pattern test: 70000000 2097152 66666666 99999999
RAMTest: Pattern test: 70000000 2097152 33333333 cccccccc
RAMTest: Address-in-address test: 70000000 2097152
nsh>
STATUS: I suspect that the RAM timing configuration is not perfect.
If you run the above RAM test you will see occasional failures after
booting into a certain state.
5. The button test at apps/examples/buttons is included in the
configuration. This configuration illustrates (1) use of the buttons

12
configs/samv71-xult/nsh/defconfig
View File

@ -123,7 +123,7 @@ CONFIG_ARMV7M_HAVE_ICACHE=y
CONFIG_ARMV7M_HAVE_DCACHE=y
CONFIG_ARMV7M_ICACHE=y
CONFIG_ARMV7M_DCACHE=y
# CONFIG_ARMV7M_DCACHE_WRITETHROUGH is not set
CONFIG_ARMV7M_DCACHE_WRITETHROUGH=y
CONFIG_ARMV7M_HAVE_ITCM=y
CONFIG_ARMV7M_HAVE_DTCM=y
# CONFIG_ARMV7M_ITCM is not set
@ -198,7 +198,7 @@ CONFIG_SAMV7_HSMCI0=y
# CONFIG_SAMV7_QSPI is not set
# CONFIG_SAMV7_RTC is not set
# CONFIG_SAMV7_RTT is not set
# CONFIG_SAMV7_SDRAMC is not set
CONFIG_SAMV7_SDRAMC=y
# CONFIG_SAMV7_SMC is not set
# CONFIG_SAMV7_SPI0 is not set
# CONFIG_SAMV7_SPI1 is not set
@ -238,6 +238,12 @@ CONFIG_SAMV7_GPIOB_IRQ=y
CONFIG_SAMV7_GPIOD_IRQ=y
# CONFIG_SAMV7_GPIOE_IRQ is not set
#
# SDRAM Configuration
#
CONFIG_SAMV7_SDRAMSIZE=2097152
# CONFIG_SAMV7_SDRAMHEAP is not set
#
# TWIHS device driver options
#
@ -979,7 +985,7 @@ CONFIG_I2CTOOL_DEFFREQ=400000
#
# RAM test
#
# CONFIG_SYSTEM_RAMTEST is not set
CONFIG_SYSTEM_RAMTEST=y
#
# readline()