README
======
This README discusses issues unique to NuttX configurations for the
STMicro STM32140G-EVAL development board.
Contents
========
- Ethernet
- LEDs
- PWM
- CAN
- FPU
- FSMC SRAM
- I/O Expanders
- STM3240G-EVAL-specific Configuration Options
- Configurations
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* 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** ON N/C N/C OFF
LED_SIGNAL In a signal handler*** 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)
* 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
** 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.
*** 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
Configuration Options:
CONFIG_CAN - Enables CAN support (one or both of CONFIG_STM32_CAN1 or
CONFIG_STM32_CAN2 must also be defined)
CONFIG_CAN_EXTID - Enables support for the 29-bit extended ID. Default
Standard 11-bit IDs.
CONFIG_CAN_FIFOSIZE - The size of the circular buffer of CAN messages.
Default: 8
CONFIG_CAN_NPENDINGRTR - The size of the list of pending RTR requests.
Default: 4
CONFIG_STM32_CAN1 - Enable support for CAN1
CONFIG_STM32_CAN1_BAUD - CAN1 BAUD rate. Required if CONFIG_STM32_CAN1
is defined.
CONFIG_STM32_CAN2 - Enable support for CAN2
CONFIG_STM32_CAN2_BAUD - CAN1 BAUD rate. Required if CONFIG_STM32_CAN2
is defined.
CONFIG_STM32_CAN_TSEG1 - The number of CAN time quanta in segment 1.
Default: 6
CONFIG_STM32_CAN_TSEG2 - the number of CAN time quanta in segment 2.
Default: 7
CONFIG_STM32_CAN_REGDEBUG - If CONFIG_DEBUG_FEATURES is set, this will generate an
dump of all CAN registers.
FPU
===
FPU Configuration Options
-------------------------
There are two version of the FPU support built into the STM32 port.
1. Non-Lazy Floating Point Register Save
In this configuration floating point register save and restore is
implemented on interrupt entry and return, respectively. In this
case, you may use floating point operations for interrupt handling
logic if necessary. This FPU behavior logic is enabled by default
with:
CONFIG_ARCH_FPU=y
2. Lazy Floating Point Register Save.
An alternative mplementation only saves and restores FPU registers only
on context switches. This means: (1) floating point registers are not
stored on each context switch and, hence, possibly better interrupt
performance. But, (2) since floating point registers are not saved,
you cannot use floating point operations within interrupt handlers.
This logic can be enabled by simply adding the following to your .config
file:
CONFIG_ARCH_FPU=y
CONFIG_ARMV7M_LAZYFPU=y
CFLAGS
------
Only recent GCC toolchains have built-in support for the Cortex-M4 FPU. You will see
the following lines in each Make.defs file:
ifeq ($(CONFIG_ARCH_FPU),y)
ARCHCPUFLAGS = -mcpu=cortex-m4 -mthumb -march=armv7e-m -mfpu=fpv4-sp-d16 -mfloat-abi=hard
else
ARCHCPUFLAGS = -mcpu=cortex-m3 -mthumb -mfloat-abi=soft
endif
Configuration Changes
---------------------
Below are all of the configuration changes that I had to make to configs/stm3240g-eval/nsh2
in order to successfully build NuttX using the Atollic toolchain WITH FPU support:
-CONFIG_ARCH_FPU=n : Enable FPU support
+CONFIG_ARCH_FPU=y
-CONFIG_ARMV7M_TOOLCHAIN_CODESOURCERYW=y : Disable the CodeSourcery toolchain
+CONFIG_ARMV7M_TOOLCHAIN_CODESOURCERYW=n
-CONFIG_ARMV7M_TOOLCHAIN_ATOLLIC=n : Enable the Atollic toolchain
+CONFIG_ARMV7M_TOOLCHAIN_ATOLLIC=y :
-CONFIG_INTELHEX_BINARY=y : Suppress generation FLASH download formats
+CONFIG_INTELHEX_BINARY=n : (Only necessary with the "Lite" version)
-CONFIG_HAVE_CXX=y : Suppress generation of C++ code
+CONFIG_HAVE_CXX=n : (Only necessary with the "Lite" version)
See the section above on Toolchains, NOTE 2, for explanations for some of
the configuration settings. Some of the usual settings are just not supported
by the "Lite" version of the Atollic toolchain.
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_FSMC_SRAM=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_FSMC_SRAM=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_FSMC_SRAM NOT defined
CONFIG_STM32_CCMEXCLUDE defined
Configuration 2. System SRAM and CCM SRAM
CONFIG_MM_REGIONS == 2
CONFIG_STM32_FSMC_SRAM NOT defined
CONFIG_STM32_CCMEXCLUDE NOT defined
Configuration 3. System SRAM and FSMC SRAM
CONFIG_MM_REGIONS == 2
CONFIG_STM32_FSMC_SRAM defined
CONFIG_STM32_CCMEXCLUDE defined
Configuration 4. System SRAM, CCM SRAM, and FSMC SRAM
CONFIG_MM_REGIONS == 3
CONFIG_STM32_FSMC_SRAM 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
STM3240G-EVAL-specific Configuration Options
============================================
CONFIG_ARCH - Identifies the arch/ subdirectory. This should
be set to:
CONFIG_ARCH=arm
CONFIG_ARCH_family - For use in C code:
CONFIG_ARCH_ARM=y
CONFIG_ARCH_architecture - For use in C code:
CONFIG_ARCH_CORTEXM4=y
CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
CONFIG_ARCH_CHIP=stm32
CONFIG_ARCH_CHIP_name - For use in C code to identify the exact
chip:
CONFIG_ARCH_CHIP_STM32F407IG=y
CONFIG_ARCH_BOARD_STM32_CUSTOM_CLOCKCONFIG - Enables special STM32 clock
configuration features.
CONFIG_ARCH_BOARD_STM32_CUSTOM_CLOCKCONFIG=n
CONFIG_ARCH_BOARD - Identifies the configs subdirectory and
hence, the board that supports the particular chip or SoC.
CONFIG_ARCH_BOARD=stm3240g_eval (for the STM3240G-EVAL development board)
CONFIG_ARCH_BOARD_name - For use in C code
CONFIG_ARCH_BOARD_STM3240G_EVAL=y
CONFIG_ARCH_LOOPSPERMSEC - Must be calibrated for correct operation
of delay loops
CONFIG_ENDIAN_BIG - define if big endian (default is little
endian)
CONFIG_RAM_SIZE - Describes the installed DRAM (SRAM in this case):
CONFIG_RAM_SIZE=0x00010000 (64Kb)
CONFIG_RAM_START - The start address of installed DRAM
CONFIG_RAM_START=0x20000000
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_SRAM - 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 (hex)
CONFIG_HEAP2_END - The size of the SRAM in the FSMC address space (decimal)
CONFIG_ARCH_FPU - The STM3240xxx supports a floating point unit (FPU)
CONFIG_ARCH_FPU=y
CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to boards that
have LEDs
CONFIG_ARCH_INTERRUPTSTACK - This architecture supports an interrupt
stack. If defined, this symbol is the size of the interrupt
stack in bytes. If not defined, the user task stacks will be
used during interrupt handling.
CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to board architecture.
CONFIG_ARCH_CALIBRATION - Enables some build in instrumentation that
cause a 100 second delay during boot-up. This 100 second delay
serves no purpose other than it allows you to calibrate
CONFIG_ARCH_LOOPSPERMSEC. You simply use a stop watch to measure
the 100 second delay then adjust CONFIG_ARCH_LOOPSPERMSEC until
the delay actually is 100 seconds.
Individual subsystems can be enabled:
AHB1
----
CONFIG_STM32_CRC
CONFIG_STM32_BKPSRAM
CONFIG_STM32_CCMDATARAM
CONFIG_STM32_DMA1
CONFIG_STM32_DMA2
CONFIG_STM32_ETHMAC
CONFIG_STM32_OTGHS
AHB2
----
CONFIG_STM32_DCMI
CONFIG_STM32_CRYP
CONFIG_STM32_HASH
CONFIG_STM32_RNG
CONFIG_STM32_OTGFS
AHB3
----
CONFIG_STM32_FSMC
APB1
----
CONFIG_STM32_TIM2
CONFIG_STM32_TIM3
CONFIG_STM32_TIM4
CONFIG_STM32_TIM5
CONFIG_STM32_TIM6
CONFIG_STM32_TIM7
CONFIG_STM32_TIM12
CONFIG_STM32_TIM13
CONFIG_STM32_TIM14
CONFIG_STM32_WWDG
CONFIG_STM32_IWDG
CONFIG_STM32_SPI2
CONFIG_STM32_SPI3
CONFIG_STM32_USART2
CONFIG_STM32_USART3
CONFIG_STM32_UART4
CONFIG_STM32_UART5
CONFIG_STM32_I2C1
CONFIG_STM32_I2C2
CONFIG_STM32_I2C3
CONFIG_STM32_CAN1
CONFIG_STM32_CAN2
CONFIG_STM32_DAC1
CONFIG_STM32_DAC2
CONFIG_STM32_PWR -- Required for RTC
APB2
----
CONFIG_STM32_TIM1
CONFIG_STM32_TIM8
CONFIG_STM32_USART1
CONFIG_STM32_USART6
CONFIG_STM32_ADC1
CONFIG_STM32_ADC2
CONFIG_STM32_ADC3
CONFIG_STM32_SDIO
CONFIG_STM32_SPI1
CONFIG_STM32_SYSCFG
CONFIG_STM32_TIM9
CONFIG_STM32_TIM10
CONFIG_STM32_TIM11
Timer devices may be used for different purposes. One special purpose is
to generate modulated outputs for such things as motor control. If CONFIG_STM32_TIMn
is defined (as above) then the following may also be defined to indicate that
the timer is intended to be used for pulsed output modulation, ADC conversion,
or DAC conversion. Note that ADC/DAC require two definition: Not only do you have
to assign the timer (n) for used by the ADC or DAC, but then you also have to
configure which ADC or DAC (m) it is assigned to.
CONFIG_STM32_TIMn_PWM Reserve timer n for use by PWM, n=1,..,14
CONFIG_STM32_TIMn_ADC Reserve timer n for use by ADC, n=1,..,14
CONFIG_STM32_TIMn_ADCm Reserve timer n to trigger ADCm, n=1,..,14, m=1,..,3
CONFIG_STM32_TIMn_DAC Reserve timer n for use by DAC, n=1,..,14
CONFIG_STM32_TIMn_DACm Reserve timer n to trigger DACm, n=1,..,14, m=1,..,2
For each timer that is enabled for PWM usage, we need the following additional
configuration settings:
CONFIG_STM32_TIMx_CHANNEL - Specifies the timer output channel {1,..,4}
NOTE: The STM32 timers are each capable of generating different signals on
each of the four channels with different duty cycles. That capability is
not supported by this driver: Only one output channel per timer.
JTAG Enable settings (by default JTAG-DP and SW-DP are disabled):
CONFIG_STM32_JTAG_FULL_ENABLE - Enables full SWJ (JTAG-DP + SW-DP)
CONFIG_STM32_JTAG_NOJNTRST_ENABLE - Enables full SWJ (JTAG-DP + SW-DP)
but without JNTRST.
CONFIG_STM32_JTAG_SW_ENABLE - Set JTAG-DP disabled and SW-DP enabled
STM3240xxx specific device driver settings
CONFIG_U[S]ARTn_SERIAL_CONSOLE - selects the USARTn (n=1,2,3) or UART
m (m=4,5) for the console and ttys0 (default is the USART1).
CONFIG_U[S]ARTn_RXBUFSIZE - Characters are buffered as received.
This specific the size of the receive buffer
CONFIG_U[S]ARTn_TXBUFSIZE - Characters are buffered before
being sent. This specific the size of the transmit buffer
CONFIG_U[S]ARTn_BAUD - The configure BAUD of the UART. Must be
CONFIG_U[S]ARTn_BITS - The number of bits. Must be either 7 or 8.
CONFIG_U[S]ARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity
CONFIG_U[S]ARTn_2STOP - Two stop bits
CONFIG_STM32_SPI_INTERRUPTS - Select to enable interrupt driven SPI
support. Non-interrupt-driven, poll-waiting is recommended if the
interrupt rate would be to high in the interrupt driven case.
CONFIG_STM32_SPI_DMA - Use DMA to improve SPI transfer performance.
Cannot be used with CONFIG_STM32_SPI_INTERRUPT.
CONFIG_SDIO_DMA - Support DMA data transfers. Requires CONFIG_STM32_SDIO
and CONFIG_STM32_DMA2.
CONFIG_STM32_SDIO_PRI - Select SDIO interrupt prority. Default: 128
CONFIG_STM32_SDIO_DMAPRIO - Select SDIO DMA interrupt priority.
Default: Medium
CONFIG_STM32_SDIO_WIDTH_D1_ONLY - Select 1-bit transfer mode. Default:
4-bit transfer mode.
CONFIG_STM32_PHYADDR - The 5-bit address of the PHY on the board
CONFIG_STM32_MII - Support Ethernet MII interface
CONFIG_STM32_MII_MCO1 - Use MCO1 to clock the MII interface
CONFIG_STM32_MII_MCO2 - Use MCO2 to clock the MII interface
CONFIG_STM32_RMII - Support Ethernet RMII interface
CONFIG_STM32_AUTONEG - Use PHY autonegotiation to determine speed and mode
CONFIG_STM32_ETHFD - If CONFIG_STM32_AUTONEG is not defined, then this
may be defined to select full duplex mode. Default: half-duplex
CONFIG_STM32_ETH100MBPS - If CONFIG_STM32_AUTONEG is not defined, then this
may be defined to select 100 MBps speed. Default: 10 Mbps
CONFIG_STM32_PHYSR - This must be provided if CONFIG_STM32_AUTONEG is
defined. The PHY status register address may diff from PHY to PHY. This
configuration sets the address of the PHY status register.
CONFIG_STM32_PHYSR_SPEED - This must be provided if CONFIG_STM32_AUTONEG is
defined. This provides bit mask indicating 10 or 100MBps speed.
CONFIG_STM32_PHYSR_100MBPS - This must be provided if CONFIG_STM32_AUTONEG is
defined. This provides the value of the speed bit(s) indicating 100MBps speed.
CONFIG_STM32_PHYSR_MODE - This must be provided if CONFIG_STM32_AUTONEG is
defined. This provide bit mask indicating full or half duplex modes.
CONFIG_STM32_PHYSR_FULLDUPLEX - This must be provided if CONFIG_STM32_AUTONEG is
defined. This provides the value of the mode bits indicating full duplex mode.
CONFIG_STM32_ETH_PTP - Precision Time Protocol (PTP). Not supported
but some hooks are indicated with this condition.
STM3240G-EVAL CAN Configuration
CONFIG_CAN - Enables CAN support (one or both of CONFIG_STM32_CAN1 or
CONFIG_STM32_CAN2 must also be defined)
CONFIG_CAN_FIFOSIZE - The size of the circular buffer of CAN messages.
Default: 8
CONFIG_CAN_NPENDINGRTR - The size of the list of pending RTR requests.
Default: 4
CONFIG_CAN_LOOPBACK - A CAN driver may or may not support a loopback
mode for testing. The STM32 CAN driver does support loopback mode.
CONFIG_STM32_CAN1_BAUD - CAN1 BAUD rate. Required if CONFIG_STM32_CAN1
is defined.
CONFIG_STM32_CAN2_BAUD - CAN1 BAUD rate. Required if CONFIG_STM32_CAN2
is defined.
CONFIG_STM32_CAN_TSEG1 - The number of CAN time quanta in segment 1.
Default: 6
CONFIG_STM32_CAN_TSEG2 - the number of CAN time quanta in segment 2.
Default: 7
CONFIG_STM32_CAN_REGDEBUG - If CONFIG_DEBUG_FEATURES is set, this will generate an
dump of all CAN registers.
STM3240G-EVAL LCD Hardware Configuration
The LCD driver supports the following LCDs on the STM324xG_EVAL board:
AM-240320L8TNQW00H (LCD_ILI9320 or LCD_ILI9321) OR
AM-240320D5TOQW01H (LCD_ILI9325)
Configuration options.
CONFIG_LCD_LANDSCAPE - Define for 320x240 display "landscape"
support. Default is this 320x240 "landscape" orientation
For the STM3240G-EVAL board, the edge opposite from the row of buttons
is used as the top of the display in this orientation.
CONFIG_LCD_RLANDSCAPE - Define for 320x240 display "reverse
landscape" support. Default is this 320x240 "landscape"
orientation
For the STM3240G-EVAL board, the edge next to the row of buttons
is used as the top of the display in this orientation.
CONFIG_LCD_PORTRAIT - Define for 240x320 display "portrait"
orientation support. In this orientation, the STM3210E-EVAL's
LCD ribbon cable is at the bottom of the display. Default is
320x240 "landscape" orientation.
In this orientation, the top of the display is to the left
of the buttons (if the board is held so that the buttons are at the
botton of the board).
CONFIG_LCD_RPORTRAIT - Define for 240x320 display "reverse
portrait" orientation support. In this orientation, the
STM3210E-EVAL's LCD ribbon cable is at the top of the display.
Default is 320x240 "landscape" orientation.
In this orientation, the top of the display is to the right
of the buttons (if the board is held so that the buttons are at the
botton of the board).
CONFIG_STM3240G_LCD_RDSHIFT - When reading 16-bit gram data, there appears
to be a shift in the returned data. This value fixes the offset.
Default 5.
The LCD driver dynamically selects the LCD based on the reported LCD
ID value. However, code size can be reduced by suppressing support for
individual LCDs using:
CONFIG_STM3240G_ILI9320_DISABLE (includes ILI9321)
CONFIG_STM3240G_ILI9325_DISABLE
STM32 USB OTG FS Host Driver Support
Pre-requisites
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
Options:
CONFIG_STM32_OTGFS_RXFIFO_SIZE - Size of the RX FIFO in 32-bit words.
Default 128 (512 bytes)
CONFIG_STM32_OTGFS_NPTXFIFO_SIZE - Size of the non-periodic Tx FIFO
in 32-bit words. Default 96 (384 bytes)
CONFIG_STM32_OTGFS_PTXFIFO_SIZE - Size of the periodic Tx FIFO in 32-bit
words. Default 96 (384 bytes)
CONFIG_STM32_OTGFS_DESCSIZE - Maximum size of a descriptor. Default: 128
CONFIG_STM32_OTGFS_SOFINTR - Enable SOF interrupts. Why would you ever
want to do that?
CONFIG_STM32_USBHOST_REGDEBUG - Enable very low-level register access
debug. Depends on CONFIG_DEBUG_FEATURES.
CONFIG_STM32_USBHOST_PKTDUMP - Dump all incoming and outgoing USB
packets. Depends on CONFIG_DEBUG_FEATURES.
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 DCHP 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_ARMV7M_TOOLCHAIN_CODESOURCERYW=y
discover:
--------
This configuration exercises netutils/discover utility using
apps/exmaples/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_ARMV7M_TOOLCHAIN_CODESOURCERYL=y - CodeSourcery 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_ARMV7M_TOOLCHAIN_BUILDROOT=y : NuttX EABI buildroot toolchain
CONFIG_CXX_NEWLONG=y : size_t is long (maybe?)
This is easily changed by modifying the configuration.
NOTE: When I used a recent CodeSourcery toolchain, then toolchain
generated an illegal blx to an even address when calling into one
of the EABI math libraries. I don't know why this happened or if
the probably is repeatable with other CodeSourcery versions. You
can try for yourself setting:
CONFIG_ARMV7M_TOOLCHAIN_CODESOURCERYW=y : CodeSourcery under Windows
CONFIG_CXX_NEWLONG=n : size_t is unsigned int (maybe?)
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 (see the top-level TODO file).
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_ARMV7M_TOOLCHAIN_CODESOURCERYW=y : CodeSourcery under 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_ARMV7M_TOOLCHAIN_CODESOURCERYW=y : CodeSourcery under 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
And enable poll() support in the NuttX configuration file:
CONFIG_DISABLE_POLL=n
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 fillowing 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 suppport
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 tht 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_RAMLOG_CONSOLE=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_DISABLE=y"
For this reason, CONFIG_MMCSD_MULTIBLOCK_DISABLE=y 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_ARMV7M_TOOLCHAIN_CODESOURCERYW=y : CodeSourcery under Windows
nxwm
----
This is a special configuration setup for the NxWM window manager
UnitTest. The NxWM window manager can be found here:
nuttx-code/NxWidgets/nxwm
The NxWM unit test can be found at:
nuttx-code/NxWidgets/UnitTests/nxwm
Documentation for installing the NxWM unit test can be found here:
nuttx-code/NxWidgets/UnitTests/README.txt
Here is the quick summary of the build steps (Assuming that all of
the required packages are available in a directory ~/nuttx-code):
1. Install the nxwm configuration
$ cd ~/nuttx-code/nuttx
$ tools/configure.sh stm3240g-eval/nxwm
Use the -l option with the configure.sh script if you are using a
Linux host; use the -c option if you are using Cygwin under Windows.
Use the -h option to see other selections.
2. Make the build context (only)
$ make context
3. Install the nxwm unit test
$ cd ~/nuttx-code/NxWidgets
$ tools/install.sh ~/nuttx-code/apps nxwm
Creating symbolic link
- To ~/nuttx-code/NxWidgets/UnitTests/nxwm
- At ~/nuttx-code/apps/external
4. Build the NxWidgets library
$ cd ~/nuttx-code/NxWidgets/libnxwidgets
$ make TOPDIR=~/nuttx-code/nuttx
5. Build the NxWM library
$ cd ~/nuttx-code/NxWidgets/nxwm
$ make TOPDIR=~/nuttx-code/nuttx
6. Built NuttX with the installed unit test as the application
$ cd ~/nuttx-code/nuttx
$ make
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_ARMV7M_TOOLCHAIN_CODESOURCERYW=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.
