README
======
The NuttX configuration for the Olimex STM32-P407 is derives more or less
directly from the Olimex STM32-P207 board support. The P207 and P407 seem
to share the same board design. Other code comes from the STM3240G board
support (which has the same crystal and clocking) and from the STM32 F4
Discovery (which has the same STM32 part)
Contents
========
o Board Support
o microSD Card Interface
o OTGFS Host
o Configurations
Board Support
=============
The following peripherals are available in this configuration.
- LEDs: Show the sytem status
- Buttons: TAMPER-button, WKUP-button, J1-Joystick (consists of RIGHT-,
UP-, LEFT-, DOWN-, and CENTER-button).
- ADC: ADC1 samples the red trim potentiometer AN_TR
Built in app 'adc' works.
- USB-FS-OTG: There is a USB-A-connector (host) connected to the full
speed STM32 OTG inputs.
- USB-HS-OTG: The other connector (device) is connected to the high speed
STM32 OTG inputs.
- CAN: Built in app 'can' works, but apart from that not really
tested.
- Ethernet: Ping to other station on the network works.
- microSD: Not fully functional. See below.
- LCD: Nokia 6610. This is similar the Nokia 6100 LCD used on other
Olimex boards. There is a driver for that LCD at
drivers/lcd/nokia6100.c, however, it is not properly
integrated. It uses a 9-bit SPI interface which is difficult
to get working properly.
- External Support is included for the onboard SRAM. It uses SRAM
SRAM: settings from another board that might need to be tweaked.
Difficult to test because the SRAM conflicts with both
RS232 ports.
- Other: Buzzer, Camera, Temperature sensor, audio have not been
tested.
If so, then it requires a 9-bit
microSD Card Interface
======================
microSD Connector
-----------------
----------------- ----------------- ------------------------
SD/MMC CONNECTOR BOARD GPIO CONFIGURATION(s
PIN SIGNAL SIGNAL (no remapping)
--- ------------- ----------------- -------------------------
1 DAT2/RES SD_D2/USART3_TX/ PC10 GPIO_SDIO_D2
SPI3_SCK
2 CD/DAT3/CS SD_D3/USART3_RX/ PC11 GPIO_SDIO_D3
SPI3_MISO
3 CMD/DI SD_CMD PD2 GPIO_SDIO_CMD
4 VDD N/A N/A
5 CLK/SCLK SD_CLK/SPI3_MOSI PC12 GPIO_SDIO_CK
6 VSS N/A N/A
7 DAT0/D0 SD_D0/DCMI_D2 PC8 GPIO_SDIO_D0
8 DAT1/RES SD_D1/DCMI_D3 PC9 GPIO_SDIO_D1
--- ------------- ----------------- -------------------------
NOTES:
1. DAT4, DAT4, DAT6, and DAT7 not connected.
2. There are no alternative pin selections.
3. There is no card detect (CD) GPIO input so we will not
sense if there is a card in the SD slot or not. This will
make usage very awkward.
Configuration
-------------
Enabling SDIO-based MMC/SD support:
System Type->STM32 Peripheral Support
CONFIG_STM32_SDIO=y : Enable SDIO support
CONFIG_STM32_DMA2=y : DMA2 is needed by the driver
Device Drivers -> MMC/SD Driver Support
CONFIG_MMCSD=y : Enable MMC/SD support
CONFIG_MMSCD_NSLOTS=1 : One slot per driver instance
# CONFIG_MMCSD_HAVE_CARDDETECT is not set : No card-detect GPIO
# CONFIG_MMCSD_MMCSUPPORT is not set : Interferes with some SD cards
# CONFIG_MMCSD_SPI is not set : No SPI-based MMC/SD support
CONFIG_MMCSD_SDIO=y : SDIO-based MMC/SD support
CONFIG_MMCSD_MULTIBLOCK_DISABLE=y : Disable to keep things simple
CONFIG_SDIO_DMA=y : Use SDIO DMA
# CONFIG_SDIO_BLOCKSETUP is not set : (not implemented)
Library Routines
CONFIG_SCHED_WORKQUEUE=y : Driver needs work queue support
Application Configuration -> NSH Library
CONFIG_NSH_ARCHINIT=y : NSH board-initialization
Using the SD card
-----------------
1. Since there is no CD GPIO pin, the firmware sill not know if there is
a card in the SD slot or not. It will assume that there is and attempt
to mount the SD card on power-up. If there is no SD card in the card
slot, there will be a long delay during initialization as the firmware
attempts to query the non-existent card, timeout, and retry.
2. After booting, an SDIO device will appear as /dev/mmcsd0
3. If you try mounting an SD card with nothing in the slot, the
mount will fail:
nsh> mount -t vfat /dev/mmcsd0 /mnt/sdcard
nsh: mount: mount failed: 19
STATUS:
-------
2017-01-28: There is no card communication. All commands to the SD card timeout.
OTGFS Host
==========
STM32 USB OTG FS Host Board Support
-----------------------------------
A USB-A-connector (host) is connected to the full speed STM32 inputs. These
are the pins supported by the STM32:
PIN SIGNAL DIRECTION
---- ----------- ----------
PA8 OTG_FS_SOF SOF clock output
PA9 OTG_FS_VBUS VBUS input for device, Driven by external regulator by
host (not an alternate function)
PA10 OTG_FS_ID OTG ID pin (only needed in Dual mode)
PA11 OTG_FS_DM D- I/O
PA12 OTG_FS_DP D+ I/O
These are the signals available on-board:
OTG_FS_VBUS Used host VBUS sensing (device input only)
OTG_FS_DM Data minus
OTG_FS_DP Dta plus
NOTE: PA10 is currently used for DCMI_D1. The USB OTGFS host will
configure this as the ID input.
VBUS power is provided via an LM3526 and driven by USB_FS_VBUSON:
USB_FS_VBUSON PC2 power on output to LM3526 #ENA
USB_FS_FAULT PB10 overcurrent input from LM3526 FLAG_A.
STM32 USB OTG FS Host Driver Configuration
------------------------------------------
Pre-requisites
CONFIG_USBDEV - Enable USB device support
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
STM32 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.
Olimex STM32 P407 Configuration:
CONFIG_STM32F4DISCO_OLIMEXP407_PRIO - Priority of the USB host watier
thread (default 100).
CONFIG_STM32F4DISCO_OLIMEXP407_STACKSIZE - Stacksize of the USB host
waiter thread (default 1024)
Class Driver Configuration
--------------------------
Individual class drivers have additional configuration requirements. The
USB mass storage class, for example, requires FAT file system support.
CONFIG_USBHOST_MSC=y
CONFIG_FS_FAT=y
CONFIG_FAT_LCNAMES=y
CONFIG_FAT_LFN=y
CONFIG_FAT_MAXFNAME=32
This will enable USB HID keyboard support:
CONFIG_USBHOST_HIDKBD=y
CONFIG_HIDKBD_BUFSIZE=64
CONFIG_HIDKBD_DEFPRIO=50
CONFIG_HIDKBD_POLLUSEC=100000
CONFIG_HIDKBD_STACKSIZE=1024
And this will enable the USB keyboard example:
CONFIG_EXAMPLES_HIDKBD=y
CONFIG_EXAMPLES_HIDKBD_DEFPRIO=50
CONFIG_EXAMPLES_HIDKBD_DEVNAME="/dev/kbda"
CONFIG_EXAMPLES_HIDKBD_STACKSIZE=1024
STATUS: The MSC configurations seems fully functional. The HIDKBD seems rather
flaky. Sometimes the LEDs become very bright (indicating that it is being
swamped with interrupts). Data input is not clean with apps/examples/hidkbd:
There are missing characters and sometimes duplicated characters. This implies
some logic issues, probably in drivers/usbhost/usbhost_hidkbd, with polling and
data filtering.
Configurations
==============
Information Common to All Configurations
----------------------------------------
Each Olimex STM32-P407 configuration is maintained in a sub-directory and can be
selected as follow:
cd tools
./configure.sh olimex-stm32-p407/<subdir>
cd -
Where <subdir> is one of the configuration sub-directories listed in the
following section.
Before building, make sure the PATH environment variable includes the
correct path to the directory than holds your toolchain binaries.
And then build NuttX by simply typing the following. At the conclusion of
the make, the nuttx binary will reside in an ELF file called, simply, nuttx.
make oldconfig
make
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. Serial Output
This configuraiont produces all of its test output on the serial
console. This configuration has USART3 enabled as a serial console.
This is the connector labeled RS232_2. This can easily be changed
by reconfiguring with 'make menuconfig'.
3. Toolchain
By default, the host platform is set to be Linux using the NuttX
buildroot toolchain. The host and/or toolchain selection can easily
be changed with 'make menuconfig'.
4. Note that CONFIG_STM32_DISABLE_IDLE_SLEEP_DURING_DEBUG is enabled so
that the JTAG connection is not disconnected by the idle loop.
Configuration sub-directories
-----------------------------
The <subdir> that is provided above as an argument to the tools/configure.sh
must be is one of the following.
knsh:
This is identical to the nsh configuration below except that NuttX
is built as a PROTECTED mode, monolithic module and the user applications
are built separately.
It is recommends 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. That 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. 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
The J-Link programmer will except files in .hex, .mot, .srec, and .bin
formats.
2. Combining .hex files. If you plan to use the .hex files with your
debugger or FLASH utility, then you may 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 to write the FLASH image.
If you do this a lot, you will probably want to invest a little time
to develop a tool to automate these steps.
nsh:
This is the NuttShell (NSH) using the NSH startup logic at
apps/examples/nsh.
NOTES:
1. USB host support for USB FLASH sticks is enbabled. See the notes
above under "OTGFS Host".
STATUS: I have seen this work with some FLASH sticks but not with
others. I have not studied the failure case carefully. They seem
to fail because the request is NAKed. That is not a failure, however,
that is normal behavior when the FLASH is not ready.
There have been other cases like this with the STM32 host drivers:
in the event of NAKs, other drivers retry and wait for the data. The
STM32 does not but returns the NAK failure immediately. My guess is
that there needs to be be some retry logic to the driver 100%
reliable.
2. Kernel Modules / Shared Libraries
I used this configuration for testing NuttX kernel modules in the
FLAT build with the following configuration additions to the
configuration file:
CONFIG_BOARDCTL_OS_SYMTAB=y
CONFIG_EXAMPLES_MODULE=y
CONFIG_EXAMPLES_MODULE_BUILTINFS=y
CONFIG_EXAMPLES_MODULE_DEVMINOR=0
CONFIG_EXAMPLES_MODULE_DEVPATH="/dev/ram0"
CONFIG_FS_ROMFS=y
CONFIG_LIBC_ARCH_ELF=y
CONFIG_MODULE=y
CONFIG_LIBC_MODLIB=y
CONFIG_MODLIB_ALIGN_LOG2=2
CONFIG_MODLIB_BUFFERINCR=32
CONFIG_MODLIB_BUFFERSIZE=128
Add the following for testing shared libraries in the FLAT
build:
CONFIG_LIBC_DLLFCN=y
CONFIG_EXAMPLES_SOTEST=y
CONFIG_EXAMPLES_SOTEST_BUILTINFS=y
CONFIG_EXAMPLES_SOTEST_DEVMINOR=1
CONFIG_EXAMPLES_SOTEST_DEVPATH="/dev/ram1"
STATUS
======
2016-12-21: This board configuration was ported from the Olimex STM32 P207
port. Note that none of the above features have been verified. USB, CAN,
ADC, and Ethernet are disabled in the base NSH configuration until they
can be verified. These features should be functional but may required
some tweaks due to the different clock configurations. The Olimex STM32
P207 nsh/defconfig would be a good starting place for restoring these
feature configurations.
CCM memory is not included in the heap (CONFIG_STM32_CCMEXCLUDE=y) because
it does not suport DMA, leaving only 128KiB for program usage.
2107-01-23: Added the knsh configuration and support for the PROTECTED
build mode.
