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Documentation: migrate STM32F4
2023-08-23 10:22:31 +02:00
=================
ST STM32140G-EVAL
=================
This page discusses issues unique to NuttX configurations for the
STMicro STM32140G-EVAL development board.
Ethernet
========
The Ethernet driver is configured to use the MII interface:
Board Jumper Settings::
Jumper Description
JP8 To enable MII, JP8 should not be fitted.
JP6 2-3: Enable MII interface mode
JP5 2-3: Provide 25 MHz clock for MII or 50 MHz clock for RMII by MCO at PA8
SB1 Not used with MII
LEDs
====
The STM3240G-EVAL board has four LEDs labeled LD1, LD2, LD3 and LD4 on the
board.. These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
defined. In that case, the usage by the board port is defined in
include/board.h and src/up_leds.c. The LEDs are used to encode OS-related\
events as follows::
SYMBOL Meaning LED1[1] LED2 LED3 LED4
------------------- ----------------------- ------- ------- ------- ------
LED_STARTED NuttX has been started ON OFF OFF OFF
LED_HEAPALLOCATE Heap has been allocated OFF ON OFF OFF
LED_IRQSENABLED Interrupts enabled ON ON OFF OFF
LED_STACKCREATED Idle stack created OFF OFF ON OFF
LED_INIRQ In an interrupt[2] ON N/C N/C OFF
LED_SIGNAL In a signal handler[3] N/C ON N/C OFF
LED_ASSERTION An assertion failed ON ON N/C OFF
LED_PANIC The system has crashed N/C N/C N/C ON
LED_IDLE STM32 is is sleep mode (Optional, not used)
[1] If LED1, LED2, LED3 are statically on, then NuttX probably failed to boot
and these LEDs will give you some indication of where the failure was
[2] The normal state is LED3 ON and LED1 faintly glowing. This faint glow
is because of timer interrupts that result in the LED being illuminated
on a small proportion of the time.
[3] LED2 may also flicker normally if signals are processed.
PWM
===
The STM3240G-Eval has no real on-board PWM devices, but the board can be
configured to output a pulse train using timer output pins. The following
pins have been use to generate PWM output (see board.h for some other
candidates):
TIM4 CH2. Pin PD13 is used by the FSMC (FSMC_A18) and is also connected
to the Motor Control Connector (CN5) just for this purpose. If FSMC is
not enabled, then FSMC_A18 will not be used (and will be tri-stated from
the LCD).
CONFIGURATION::
CONFIG_STM32_TIM4=y
CONFIG_PWM=n
CONFIG_PWM_PULSECOUNT=n
CONFIG_STM32_TIM4_PWM=y
CONFIG_STM32_TIM4_CHANNEL=2
ACCESS::
Daughter board Extension Connector, CN3, pin 32
Ground is available on CN3, pin1
NOTE: TIM4 hardware will not support pulse counting.
TIM8 CH4: Pin PC9 is used by the microSD card (MicroSDCard_D1) and I2S
(I2S_CKIN) but can be completely disconnected from both by opening JP16.
CONFIGURATION::
CONFIG_STM32_TIM8=y
CONFIG_PWM=n
CONFIG_PWM_PULSECOUNT=y
CONFIG_STM32_TIM8_PWM=y
CONFIG_STM32_TIM8_CHANNEL=4
ACCESS::
Daughterboard Extension Connector, CN3, pin 17
Ground is available on CN3, pin1
CAN
===
Connector 10 (CN10) is DB-9 male connector that can be used with CAN1 or CAN2.::
JP10 connects CAN1_RX or CAN2_RX to the CAN transceiver
JP3 connects CAN1_TX or CAN2_TX to the CAN transceiver
CAN signals are then available on CN10 pins:::
CN10 Pin 7 = CANH
CN10 Pin 2 = CANL
Mapping to STM32 GPIO pins::
PD0 = FSMC_D2 & CAN1_RX
PD1 = FSMC_D3 & CAN1_TX
PB13 = ULPI_D6 & CAN2_TX
PB5 = ULPI_D7 & CAN2_RX
FSMC SRAM
=========
On-board SRAM
-------------
A 16 Mbit SRAM is connected to the STM32F407IGH6 FSMC bus which shares the same
I/Os with the CAN1 bus. Jumper settings::
JP1: Connect PE4 to SRAM as A20
JP2: onnect PE3 to SRAM as A19
JP3 and JP10 must not be fitted for SRAM and LCD application. JP3 and JP10
select CAN1 or CAN2 if fitted; neither if not fitted.
The on-board SRAM can be configured by setting::
CONFIG_STM32_FSMC=y
CONFIG_STM32_EXTERNAL_RAM=y
CONFIG_HEAP2_BASE=0x64000000
CONFIG_HEAP2_SIZE=2097152
CONFIG_MM_REGIONS=2 (or =3, see below)
Configuration Options
---------------------
Internal SRAM is available in all members of the STM32 family. The F4 family
also contains internal CCM SRAM. This SRAM is different because it cannot
be used for DMA. So if DMA needed, then the following should be defined
to exclude CCM SRAM from the heap::
CONFIG_STM32_CCMEXCLUDE : Exclude CCM SRAM from the HEAP
In addition to internal SRAM, SRAM may also be available through the FSMC.
In order to use FSMC SRAM, the following additional things need to be
present in the NuttX configuration file::
CONFIG_STM32_FSMC=y : Enables the FSMC
CONFIG_STM32_EXTERNAL_RAM=y : Indicates that SRAM is available via the
FSMC (as opposed to an LCD or FLASH).
CONFIG_HEAP2_BASE : The base address of the SRAM in the FSMC
address space
CONFIG_HEAP2_SIZE : The size of the SRAM in the FSMC
address space
CONFIG_MM_REGIONS : Must be set to a large enough value to
include the FSMC SRAM
SRAM Configurations
-------------------
There are 4 possible SRAM configurations::
Configuration 1. System SRAM (only)
CONFIG_MM_REGIONS == 1
CONFIG_STM32_EXTERNAL_RAM NOT defined
CONFIG_STM32_CCMEXCLUDE defined
Configuration 2. System SRAM and CCM SRAM
CONFIG_MM_REGIONS == 2
CONFIG_STM32_EXTERNAL_RAM NOT defined
CONFIG_STM32_CCMEXCLUDE NOT defined
Configuration 3. System SRAM and FSMC SRAM
CONFIG_MM_REGIONS == 2
CONFIG_STM32_EXTERNAL_RAM defined
CONFIG_STM32_CCMEXCLUDE defined
Configuration 4. System SRAM, CCM SRAM, and FSMC SRAM
CONFIG_MM_REGIONS == 3
CONFIG_STM32_ETXERNAL_RAM defined
CONFIG_STM32_CCMEXCLUDE NOT defined
I/O Expanders
=============
The STM3240G-EVAL has two STMPE811QTR I/O expanders on board both connected to
the STM32 via I2C1. They share a common interrupt line: PI2.
STMPE811 U24, I2C address 0x41 (7-bit)
====== ==== ================ ============================================
STPE11 PIN BOARD SIGNAL BOARD CONNECTION
====== ==== ================ ============================================
Y- TouchScreen_Y- LCD Connector XL
X- TouchScreen_X- LCD Connector XR
Y+ TouchScreen_Y+ LCD Connector XD
X+ TouchScreen_X+ LCD Connector XU
IN3 EXP_IO9
IN2 EXP_IO10
IN1 EXP_IO11
IN0 EXP_IO12
====== ==== ================ ============================================
STMPE811 U29, I2C address 0x44 (7-bit)
====== ==== ================ ============================================
STPE11 PIN BOARD SIGNAL BOARD CONNECTION
====== ==== ================ ============================================
Y- EXP_IO1
X- EXP_IO2
Y+ EXP_IO3
X+ EXP_IO4
IN3 EXP_IO5
IN2 EXP_IO6
IN1 EXP_IO7
IN0 EXP_IO8
====== ==== ================ ============================================
Configurations
==============
Each STM3240G-EVAL configuration is maintained in a sub-directory and
can be selected as follow::
tools/configure.sh stm3240g-eval:<subdir>
Where <subdir> is one of the following:
dhcpd
-----
This builds the DHCP server using the apps/examples/dhcpd application
(for execution from FLASH.) See apps/examples/README.txt for information
about the dhcpd example.
NOTES:
1. This configuration uses the mconf-based configuration tool. To
change this configurations using that tool, you should:
a. Build and install the kconfig-mconf tool. See nuttx/README.txt
see additional README.txt files in the NuttX tools repository.
b. Execute 'make menuconfig' in nuttx/ in order to start the
reconfiguration process.
2. The server address is 10.0.0.1 and it serves IP addresses in the range
10.0.0.2 through 10.0.0.17 (all of which, of course, are configurable).
3. Default build environment (also easily reconfigured)::
CONFIG_HOST_WINDOWS=y
CONFIG_WINDOWS_CYGWIN=y
CONFIG_ARM_TOOLCHAIN_GNU_EABI=y
discover
--------
This configuration exercises netutils/discover utility using
apps/examples/discover. This example initializes and starts the UDP
discover daemon. This daemon is useful for discovering devices in
local networks, especially with DHCP configured devices. It listens
for UDP broadcasts which also can include a device class so that
groups of devices can be discovered. It is also possible to address all
classes with a kind of broadcast discover.
Configuration settings that you may need to change for your
environment::
CONFIG_ARM_TOOLCHAIN_GNU_EABI=y - GNU EABI toolchain for Linux
CONFIG_EXAMPLES_DISCOVER_DHCPC=y - DHCP Client
CONFIG_EXAMPLES_DISCOVER_IPADDR - (not defined)
CONFIG_EXAMPLES_DISCOVER_DRIPADDR - Router IP address
NOTE: This configuration uses to the kconfig-mconf configuration tool to
control the configuration. See the section entitled "NuttX Configuration
Tool" in the top-level README.txt file.
fb
--
A simple NSH configuration used for some basic (non-graphic) debug of
the framebuffer character driver at drivers/video/fb.c. NOTE that
the STM3240G-EVAL LCD driver does not support a framebuffer! It
interfaces with the LCD through a parallel FSMC interface. This
configuration uses the LCD framebuffer front end at
drivers/lcd/lcd_framebuffer to convert the LCD interface into a
compatible framebuffer interface.
This examples supports the framebuffer test at apps/examples/fb. That
test simply draws a pattern into the framebuffer and updates the LCD.
This example also supports the pdcurses library at apps/graphics/pdcurses
and the demo programs at apps/examples/pdcurses. This is a good test of
the use of the framebuffer driver in an application. Many of the
pdcurses demos requires user interaction via a mouse, keyboard, or
joystick. No input devices are currently present in the configuration
so no such interaction is possible.
The STM3240G-EVAL does provide a on-board discrete joystick (djoystick)
that could be used for this interaction. However, those discrete inputs
do not go directly to the STM32 but rather go indirectly through an I/O
expander. I just have not had the motivation to deal with that yet.
STATUS:
2017-09-17: This configuration appears to be fully functional.
2017-11-25: Non-interactive pdcurses examples added.
knxwm
-----
This is identical to the nxwm configuration below except that NuttX
is built as a kernel-mode, monolithic module and the user applications
are built separately. Is is recommended to use a special make command;
not just 'make' but make with the following two arguments::
make pass1 pass2
In the normal case (just 'make'), make will attempt to build both user-
and kernel-mode blobs more or less interleaved. This actual works!
However, for me it is very confusing so I prefer the above make command:
Make the user-space binaries first (pass1), then make the kernel-space
binaries (pass2)
NOTES:
1. This configuration uses the mconf-based configuration tool. To
change this configuration using that tool, you should:
a. Build and install the kconfig-mconf tool. See nuttx/README.txt
see additional README.txt files in the NuttX tools repository.
b. Execute 'make menuconfig' in nuttx/ in order to start the
reconfiguration process.
2. This is the default platform/toolchain in the configuration:
CONFIG_HOST_WINDOWS=y : Windows
CONFIG_WINDOWS_CYGWIN=y : Cygwin environment on Windows
CONFIG_ARM_TOOLCHAIN_BUILDROOT=y : NuttX EABI buildroot toolchain
CONFIG_ARCH_SIZET_LONG=y : size_t is long (maybe?)
This is easily changed by modifying the configuration.
3. In addition to the protected mode build, this NxWM configuration
differences from the nxwm configuration in that:
a. Networking is disabled. There are issues with some of the network-
related NSH commands and with Telnet in the protected build (see the
top-level TODO file). Without these NSH commands, there is no use
for networking in this configuration.
b. The NxTerm windows are disabled. There are also issues with the
NxTerm build now.
NOTE: Those issues have been resolved. However, this configuration
has not yet be re-verified with NxTerm enabled.
c. The initialization sequence is quite different: NX and the
touchscreen are initialized in kernel mode by logic in this src/
directory before the NxWM application is started.
4. At the end of the build, there will be several files in the top-level
NuttX build directory:
PASS1:
nuttx_user.elf - The pass1 user-space ELF file
nuttx_user.hex - The pass1 Intel HEX format file (selected in defconfig)
User.map - Symbols in the user-space ELF file
PASS2:
nuttx - The pass2 kernel-space ELF file
nuttx.hex - The pass2 Intel HEX file (selected in defconfig)
System.map - Symbols in the kernel-space ELF file
5. Combining .hex files. If you plan to use the STM32 ST-Link Utility to
load the .hex files into FLASH, then you need to combine the two hex
files into a single .hex file. Here is how you can do that.
a. The 'tail' of the nuttx.hex file should look something like this
(with my comments added):
$ tail nuttx.hex
# 00, data records
...
:10 9DC0 00 01000000000800006400020100001F0004
:10 9DD0 00 3B005A0078009700B500D400F300110151
:08 9DE0 00 30014E016D0100008D
# 05, Start Linear Address Record
:04 0000 05 0800 0419 D2
# 01, End Of File record
:00 0000 01 FF
Use an editor such as vi to remove the 05 and 01 records.
b. The 'head' of the nuttx_user.hex file should look something like
this (again with my comments added):
$ head nuttx_user.hex
# 04, Extended Linear Address Record
:02 0000 04 0801 F1
# 00, data records
:10 8000 00 BD89 01084C800108C8110208D01102087E
:10 8010 00 0010 00201C1000201C1000203C16002026
:10 8020 00 4D80 01085D80010869800108ED83010829
...
Nothing needs to be done here. The nuttx_user.hex file should
be fine.
c. Combine the edited nuttx.hex and un-edited nuttx_user.hex
file to produce a single combined hex file:
$ cat nuttx.hex nuttx_user.hex >combined.hex
Then use the combined.hex file with the STM32 ST-Link tool. If
you do this a lot, you will probably want to invest a little time
to develop a tool to automate these steps.
STATUS:
2014-10-11: This worked at one time, but today I am getting a
failure inside of the GCC library. This occurred with the
computations at the end of touchscreen calibration. The
NuttX code seems to be working correctly, but there is some
problem with how the GCC integer math is hooked in??? I did
not dig into this very deeply.
nettest
-------
This configuration directory may be used to verify networking performance
using the STM32's Ethernet controller. It uses apps/examples/nettest to exercise the
TCP/IP network.::
CONFIG_ARM_TOOLCHAIN_GNU_EABI=y : GNU EABI toolchain for Windows
CONFIG_EXAMPLES_NETTEST_SERVER=n : Target is configured as the client
CONFIG_EXAMPLES_NETTEST_PERFORMANCE=y : Only network performance is verified.
CONFIG_EXAMPLES_NETTEST_IPADDR=(10<<24|0<<16|0<<8|2) : Target side is IP: 10.0.0.2
CONFIG_EXAMPLES_NETTEST_DRIPADDR=(10<<24|0<<16|0<<8|1) : Host side is IP: 10.0.0.1
CONFIG_EXAMPLES_NETTEST_CLIENTIP=(10<<24|0<<16|0<<8|1) : Server address used by which ever is client.
NOTES:
1. This configuration uses the mconf-based configuration tool. To
change this configurations using that tool, you should:
a. Build and install the kconfig-mconf tool. See nuttx/README.txt
see additional README.txt files in the NuttX tools repository.
b. Execute 'make menuconfig' in nuttx/ in order to start the
reconfiguration process.
nsh
---
Configures the NuttShell (nsh) located at apps/examples/nsh. The
Configuration enables both the serial and telnet NSH interfaces.::
CONFIG_ARM_TOOLCHAIN_GNU_EABI=y : GNU EABI toolchain for Windows
CONFIG_NSH_DHCPC=n : DHCP is disabled
CONFIG_NSH_IPADDR=(10<<24|0<<16|0<<8|2) : Target IP address 10.0.0.2
CONFIG_NSH_DRIPADDR=(10<<24|0<<16|0<<8|1) : Host IP address 10.0.0.1
NOTES:
1. This configuration uses the mconf-based configuration tool. To
change this configurations using that tool, you should:
a. Build and install the kconfig-mconf tool. See nuttx/README.txt
see additional README.txt files in the NuttX tools repository.
b. Execute 'make menuconfig' in nuttx/ in order to start the
reconfiguration process.
2. This example assumes that a network is connected. During its
initialization, it will try to negotiate the link speed. If you have
no network connected when you reset the board, there will be a long
delay (maybe 30 seconds?) before anything happens. That is the timeout
before the networking finally gives up and decides that no network is
available.
3. This example supports the ADC test (apps/examples/adc) but this must
be manually enabled by selecting::
CONFIG_ADC=y : Enable the generic ADC infrastructure
CONFIG_STM32_ADC3=y : Enable ADC3
CONFIG_STM32_TIM1=y : Enable Timer 1
CONFIG_STM32_TIM1_ADC=y : Indicate that timer 1 will be used to trigger an ADC
CONFIG_STM32_TIM1_ADC3=y : Assign timer 1 to drive ADC3 sampling
CONFIG_STM32_ADC3_SAMPLE_FREQUENCY=100 : Select a sampling frequency
See also apps/examples/README.txt
General debug for analog devices (ADC/DAC):
CONFIG_DEBUG_ANALOG
4. This example supports the PWM test (apps/examples/pwm) but this must
be manually enabled by selecting eeither::
CONFIG_PWM=y : Enable the generic PWM infrastructure
CONFIG_PWM_PULSECOUNT=n : Disable to support for TIM1/8 pulse counts
CONFIG_STM32_TIM4=y : Enable TIM4
CONFIG_STM32_TIM4_PWM=y : Use TIM4 to generate PWM output
CONFIG_STM32_TIM4_CHANNEL=2 : Select output on TIM4, channel 2
If CONFIG_STM32_FSMC is disabled, output will appear on CN3, pin 32.
Ground is available on CN3, pin1.
Or..
CONFIG_PWM=y : Enable the generic PWM infrastructure
CONFIG_PWM_PULSECOUNT=y : Enable to support for TIM1/8 pulse counts
CONFIG_STM32_TIM8=y : Enable TIM8
CONFIG_STM32_TIM8_PWM=y : Use TIM8 to generate PWM output
CONFIG_STM32_TIM8_CHANNEL=4 : Select output on TIM8, channel 4
If CONFIG_STM32_FSMC is disabled, output will appear on CN3, pin 17
Ground is available on CN23 pin1.
See also include/board.h and apps/examples/README.txt
Special PWM-only debug options:
CONFIG_DEBUG_PWM_INFO
5. This example supports the CAN loopback test (apps/examples/can) but this
must be manually enabled by selecting::
CONFIG_CAN=y : Enable the generic CAN infrastructure
CONFIG_CAN_EXTID=y or n : Enable to support extended ID frames
CONFIG_STM32_CAN1=y : Enable CAN1
CONFIG_CAN_LOOPBACK=y : Enable CAN loopback mode
See also apps/examples/README.txt
Special CAN-only debug options:
CONFIG_DEBUG_CAN_INFO
CONFIG_STM32_CAN_REGDEBUG
6. This example can support an FTP client. In order to build in FTP client
support simply uncomment the following lines in the defconfig file (before
configuring) or in the .config file (after configuring):
CONFIG_NETUTILS_FTPC=y
CONFIG_EXAMPLES_FTPC=y
7. This example can support an FTP server. In order to build in FTP server
support simply add the following lines in the defconfig file (before
configuring) or in the .config file (after configuring):
CONFIG_NETUTILS_FTPD=y
CONFIG_EXAMPLES_FTPD=y
8. This example supports the watchdog timer test (apps/examples/watchdog)
but this must be manually enabled by selecting:
CONFIG_WATCHDOG=y : Enables watchdog timer driver support
CONFIG_STM32_WWDG=y : Enables the WWDG timer facility, OR
CONFIG_STM32_IWDG=y : Enables the IWDG timer facility (but not both)
The WWDG watchdog is driven off the (fast) 42MHz PCLK1 and, as result,
has a maximum timeout value of 49 milliseconds. For WWDG watchdog, you
should also add the following to the configuration file:
CONFIG_EXAMPLES_WATCHDOG_PINGDELAY=20
CONFIG_EXAMPLES_WATCHDOG_TIMEOUT=49
The IWDG timer has a range of about 35 seconds and should not be an issue.
9. Adding LCD and graphics support:
defconfig (nuttx/.config):
CONFIG_EXAMPLES_nx=y : Pick one or more
CONFIG_EXAMPLES_nxhello=y :
CONFIG_EXAMPLES_nximage :
CONFIG_EXAMPLES_nxlines :
CONFIG_STM32_FSMC=y : FSMC support is required for the LCD
CONFIG_NX=y : Enable graphics support
CONFIG_MM_REGIONS=3 : When FSMC is enabled, so is the on-board SRAM memory region
10. USB OTG FS Device or Host Support
CONFIG_USBDEV : Enable USB device support, OR
CONFIG_USBHOST : Enable USB host support
CONFIG_STM32_OTGFS : Enable the STM32 USB OTG FS block
CONFIG_STM32_SYSCFG : Needed
CONFIG_SCHED_WORKQUEUE : Worker thread support is required
11. USB OTG FS Host Support. The following changes will enable support for
a USB host on the STM32F4Discovery, including support for a mass storage
class driver::
CONFIG_USBDEV=n : Make sure the USB device support is disabled
CONFIG_USBHOST=y : Enable USB host support
CONFIG_STM32_OTGFS=y : Enable the STM32 USB OTG FS block
CONFIG_STM32_SYSCFG=y : Needed for all USB OTF FS support
CONFIG_SCHED_WORKQUEUE=y : Worker thread support is required for the mass
storage class driver.
CONFIG_NSH_ARCHINIT=y : Architecture specific USB initialization
is needed for NSH
CONFIG_FS_FAT=y : Needed by the USB host mass storage class.
With those changes, you can use NSH with a FLASH pen driver as shown
belong. Here NSH is started with nothing in the USB host slot::
NuttShell (NSH) NuttX-x.yy
nsh> ls /dev
/dev:
console
null
ttyS0
After inserting the FLASH drive, the /dev/sda appears and can be
mounted like this::
nsh> ls /dev
/dev:
console
null
sda
ttyS0
nsh> mount -t vfat /dev/sda /mnt/stuff
nsh> ls /mnt/stuff
/mnt/stuff:
-rw-rw-rw- 16236 filea.c
And files on the FLASH can be manipulated to standard interfaces:
nsh> echo "This is a test" >/mnt/stuff/atest.txt
nsh> ls /mnt/stuff
/mnt/stuff:
-rw-rw-rw- 16236 filea.c
-rw-rw-rw- 16 atest.txt
nsh> cat /mnt/stuff/atest.txt
This is a test
nsh> cp /mnt/stuff/filea.c fileb.c
nsh> ls /mnt/stuff
/mnt/stuff:
-rw-rw-rw- 16236 filea.c
-rw-rw-rw- 16 atest.txt
-rw-rw-rw- 16236 fileb.c
To prevent data loss, don't forget to un-mount the FLASH drive
before removing it:
nsh> umount /mnt/stuff
12. By default, this configuration supports /dev/random using the STM32's
RNG hardware. This can be disabled as follows::
-CONFIG_STM32_RNG=y
+CONFIG_STM32_RNG=n
-CONFIG_DEV_RANDOM=y
+CONFIG_DEV_RANDOM=n
13. This configuration requires that jumper JP22 be set to enable RS-232
operation.
nsh2
-----
This is an alternative NSH configuration. One limitation of the STM3240G-EVAL
board is that you cannot have both a UART-based NSH console and SDIO support.
The nsh2 differs from the nsh configuration in the following ways::
-CONFIG_STM32_USART3=y : USART3 is disabled
+CONFIG_STM32_USART3=n
-CONFIG_STM32_SDIO=n : SDIO is enabled
+CONFIG_STM32_SDIO=y
Logically, these are the only differences: This configuration has SDIO (and
the SD card) enabled and the serial console disabled. There is ONLY a
Telnet console!.
There are some special settings to make life with only a Telnet::
CONFIG_RAMLOG=y - Enable the RAM-based logging feature.
CONFIG_CONSOLE_SYSLOG=y - Use the RAM logger as the default console.
This means that any console output from non-Telnet threads will
go into the circular buffer in RAM.
CONFIG_RAMLOG_SYSLOG - This enables the RAM-based logger as the
system logger. This means that (1) in addition to the console
output from other tasks, ALL of the debug output will also to
to the circular buffer in RAM, and (2) NSH will now support a
command called 'dmesg' that can be used to dump the RAM log.
There are a few other configuration differences as necessary to support
this different device configuration. Just the do the 'diff' if you are
curious.
NOTES:
1. This configuration uses the mconf-based configuration tool. To
change this configurations using that tool, you should:
a. Build and install the kconfig-mconf tool. See nuttx/README.txt
see additional README.txt files in the NuttX tools repository.
b. Execute 'make menuconfig' in nuttx/ in order to start the
reconfiguration process.
2. See the notes for the nsh configuration. Most also apply to the nsh2
configuration. Like the nsh configuration, this configuration can
be modified to support a variety of additional tests.
3. RS-232 is disabled, but Telnet is still available for use as a console.
Since RS-232 and SDIO use the same pins (one controlled by JP22), RS232
and SDIO cannot be used concurrently.
4. This configuration requires that jumper JP22 be set to enable SDIO
operation. To enable MicroSD Card, which shares same I/Os with RS-232,
JP22 is not fitted.
5. In order to use SDIO without overruns, DMA must be used. The STM32 F4
has 192Kb of SRAM in two banks: 112Kb of "system" SRAM located at
0x2000:0000 and 64Kb of "CCM" SRAM located at 0x1000:0000. It appears
that you cannot perform DMA from CCM SRAM. The work around that I have now
is simply to omit the 64Kb of CCM SRAM from the heap so that all memory is
allocated from System SRAM. This is done by setting:
CONFIG_MM_REGIONS=1
Then DMA works fine. The downside is, of course, is that we lose 64Kb
of precious SRAM.
6. Another SDIO/DMA issue. This one is probably a software bug. This is
the bug as stated in the TODO list:
"If you use a large I/O buffer to access the file system, then the
MMCSD driver will perform multiple block SD transfers. With DMA
ON, this seems to result in CRC errors detected by the hardware
during the transfer. Workaround: CONFIG_MMCSD_MULTIBLOCK_LIMIT=1"
For this reason, CONFIG_MMCSD_MULTIBLOCK_LIMIT=1 appears in the defconfig
file.
7. Another DMA-related concern. I see this statement in the reference
manual: "The burst configuration has to be selected in order to respect
the AHB protocol, where bursts must not cross the 1 KB address boundary
because the minimum address space that can be allocated to a single slave
is 1 KB. This means that the 1 KB address boundary should not be crossed
by a burst block transfer, otherwise an AHB error would be generated,
that is not reported by the DMA registers."
There is nothing in the DMA driver to prevent this now.
nxterm
------
This is yet another NSH configuration. This NSH configuration differs
from the others, however, in that it uses the NxTerm driver to host
the NSH shell.
NOTES:
1. This configuration uses the mconf-based configuration tool. To
change this configurations using that tool, you should:
a. Build and install the kconfig-mconf tool. See nuttx/README.txt
see additional README.txt files in the NuttX tools repository.
b. Execute 'make menuconfig' in nuttx/ in order to start the
reconfiguration process.
2. Some of the differences in this configuration and the normal nsh
configuration include these settings in the defconfig file:
These select NX Multi-User mode:
CONFG_NX_MULTIUSER=y
CONFIG_DISABLE_MQUEUE=n
The following definition in the defconfig file to enables the NxTerm
driver:
CONFIG_NXTERM=y
And this selects examples/nxterm instead of examples/nsh:
CONFIG_EXAMPLES_NXTERM=y
LCD Orientation:
CONFIG_LCD_LANDSCAPE=y : 320x240 landscape
3. Default build environment (also easily reconfigured):
CONFIG_HOST_WINDOWS=y : Windows
CONFIG_WINDOWS_CYGWIN=y : With Cygwin
CONFIG_ARM_TOOLCHAIN_GNU_EABI=y : GNU EABI toolchain for Windows
nxwm
----
This is a special configuration setup for the NxWM window manager
UnitTest. The NxWM window manager can be found here::
apps/graphics/NxWidgets/nxwm
The NxWM unit test can be found at::
apps/graphics/NxWidgets/UnitTests/nxwm
telnetd
-------
A simple test of the Telnet daemon(see apps/netutils/README.txt,
apps/examples/README.txt, and apps/examples/telnetd). This is
the same daemon that is used in the nsh configuration so if you
use NSH, then you don't care about this. This test is good for
testing the Telnet daemon only because it works in a simpler
environment than does the nsh configuration.
NOTES:
1. This configuration uses the mconf-based configuration tool. To
change this configurations using that tool, you should:
a. Build and install the kconfig-mconf tool. See nuttx/README.txt
see additional README.txt files in the NuttX tools repository.
b. Execute 'make menuconfig' in nuttx/ in order to start the
reconfiguration process.
2. Default build environment (easily reconfigured)::
CONFIG_HOST_WINDOWS=y
CONFIG_WINDOWS_CYGWIN=y
CONFIG_ARM_TOOLCHAIN_GNU_EABI=y
xmlrpc
------
An example configuration for the Embeddable Lightweight XML-RPC
Server at apps/examples/xmlrpc. See http://www.drdobbs.com/web-development/\
an-embeddable-lightweight-xml-rpc-server/184405364 for more info.
Contributed by Max Holtzberg.
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