================
ST Nucleo F401RE
================
This page discusses issues unique to NuttX configurations for the ST
NucleoF401RE and NucleoF411RE boards from ST Micro. See
http://www.st.com/web/catalog/mmc/FM141/SC1169/SS1577/LN1810/PF258797
http://www.st.com/web/catalog/mmc/FM141/SC1169/SS1577/LN1877/PF260049
These two boards are very similar, both supporting STM32 "Dynamic Efficiency
Line" parts but differing in the specific STM32 chip mounted on board. The
chips themselves are also very similar with the STM32F411RE having some
additional capability:
NucleoF401RE:
- Microprocessor: 32-bit ARM Cortex M4 at 84MHz STM32F104RE
- Memory: 512 KB Flash and 96 KB SRAM
- ADC: 1×12-bit, 2.4 MSPS A/D converter: up to 10 channels
- DMA: 16-stream DMA controllers with FIFOs and burst support
- Timers: Up to 11 timers: up to six 16-bit, two 32-bit timers, two
watchdog timers, and a SysTick timer
- GPIO: Up to 81 I/O ports with interrupt capability
- I2C: Up to 3 × I2C interfaces
- USARTs: Up to 3 USARTs
- SPIs: Up to 4 SPIs (2 I2S)
- SDIO interface
- USB: USB 2.0 full-speed device/host/OTG controller with on-chip PHY
- CRC calculation unit
- RTC
The NucleoF411RE also has additional DMA and SPI peripheral capabilities.
Board features, however, are identical:
- Peripherals: 1 led, 1 push button
- Debug: Serial wire debug and JTAG interfaces
- Expansion I/F Ardino and Morpho Headers
Uses a STM32F103 to provide a ST-Link for programming, debug similar to the
OpenOcd FTDI function - USB to JTAG front-end.
See http://mbed.org/platforms/ST-Nucleo-F401RE and
http://developer.mbed.org/platforms/ST-Nucleo-F411RE for more
information about these boards.
mbed
====
The Nucleo-F401RE includes boot loader from mbed:
https://mbed.org/platforms/ST-Nucleo-F401RE/
https://mbed.org/handbook/Homepage
Using the mbed loader:
1. Connect the Nucleo-F4x1RE to the host PC using the USB connector.
2. A new file system will appear called NUCLEO; open it with Windows
Explorer (assuming that you are using Windows).
3. Drag and drop nuttx.bin into the MBED window. This will load the
nuttx.bin binary into the Nucleo-F4x1RE. The NUCLEO window will
close then re-open and the Nucleo-F4x1RE will be running the new code.
Hardware
========
GPIO
----
::
SERIAL_TX=PA_2 USER_BUTTON=PC_13
SERIAL_RX=PA_3 LED1 =PA_5
A0=PA_0 USART2RX D0=PA_3 D8 =PA_9
A1=PA_1 USART2TX D1=PA_2 D9 =PC_7
A2=PA_4 D2=PA_10 WIFI_CS=D10=PB_6 SPI_CS
A3=PB_0 WIFI_INT=D3=PB_3 D11=PA_7 SPI_MOSI
A4=PC_1 SDCS=D4=PB_5 D12=PA_6 SPI_MISO
A5=PC_0 WIFI_EN=D5=PB_4 LED1=D13=PA_5 SPI_SCK
LED2=D6=PB_10 I2C1_SDA=D14=PB_9 Probe
D7=PA_8 I2C1_SCL=D15=PB_8 Probe
From: https://mbed.org/platforms/ST-Nucleo-F401RE/
Buttons
-------
B1 USER: the user button is connected to the I/O PC13 (pin 2) of the STM32
microcontroller.
LEDs
----
The Nucleo F401RE and Nucleo F411RE provide a single user LED, LD2. LD2
is the green LED connected to Arduino signal D13 corresponding to MCU I/O
PA5 (pin 21) or PB13 (pin 34) depending on the STM32target.
- When the I/O is HIGH value, the LED is on.
- When the I/O is LOW, the LED is off.
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/sam_leds.c. The LEDs are used to encode OS-related
events as follows when the red LED (PE24) is available:
=================== ======================= ===========
SYMBOL Meaning LD2
=================== ======================= ===========
LED_STARTED NuttX has been started OFF
LED_HEAPALLOCATE Heap has been allocated OFF
LED_IRQSENABLED Interrupts enabled OFF
LED_STACKCREATED Idle stack created ON
LED_INIRQ In an interrupt No change
LED_SIGNAL In a signal handler No change
LED_ASSERTION An assertion failed No change
LED_PANIC The system has crashed Blinking
LED_IDLE MCU is is sleep mode Not used
=================== ======================= ===========
Thus if LD2, NuttX has successfully booted and is, apparently, running
normally. If LD2 is flashing at approximately 2Hz, then a fatal error
has been detected and the system has halted.
Serial Consoles
===============
USART1
------
Pins and Connectors::
RXD: PA11 CN10 pin 14
PB7 CN7 pin 21
TXD: PA10 CN9 pin 3, CN10 pin 33
PB6 CN5 pin 3, CN10 pin 17
NOTE: You may need to edit the include/board.h to select different USART1
pin selections.
TTL to RS-232 converter connection::
Nucleo CN10 STM32F4x1RE
----------- ------------
Pin 21 PA9 USART1_RX *Warning you make need to reverse RX/TX on
Pin 33 PA10 USART1_TX some RS-232 converters
Pin 20 GND
Pin 8 U5V
To configure USART1 as the console::
CONFIG_STM32_USART1=y
CONFIG_USART1_SERIALDRIVER=y
CONFIG_USART1_SERIAL_CONSOLE=y
CONFIG_USART1_RXBUFSIZE=256
CONFIG_USART1_TXBUFSIZE=256
CONFIG_USART1_BAUD=115200
CONFIG_USART1_BITS=8
CONFIG_USART1_PARITY=0
CONFIG_USART1_2STOP=0
USART2
------
Pins and Connectors::
RXD: PA3 CN9 pin 1 (See SB13, 14, 62, 63). CN10 pin 37
PD6
TXD: PA2 CN9 pin 2(See SB13, 14, 62, 63). CN10 pin 35
PD5
UART2 is the default in all of these configurations.
TTL to RS-232 converter connection::
Nucleo CN9 STM32F4x1RE
----------- ------------
Pin 1 PA3 USART2_RX *Warning you make need to reverse RX/TX on
Pin 2 PA2 USART2_TX some RS-232 converters
Solder Bridges. This configuration requires:
- SB62 and SB63 Closed: PA2 and PA3 on STM32 MCU are connected to D1 and D0
(pin 7 and pin 8) on Arduino connector CN9 and ST Morpho connector CN10
as USART signals. Thus SB13 and SB14 should be OFF.
- SB13 and SB14 Open: PA2 and PA3 on STM32F103C8T6 (ST-LINK MCU) are
disconnected to PA3 and PA2 on STM32 MCU.
To configure USART2 as the console::
CONFIG_STM32_USART2=y
CONFIG_USART2_SERIALDRIVER=y
CONFIG_USART2_SERIAL_CONSOLE=y
CONFIG_USART2_RXBUFSIZE=256
CONFIG_USART2_TXBUFSIZE=256
CONFIG_USART2_BAUD=115200
CONFIG_USART2_BITS=8
CONFIG_USART2_PARITY=0
CONFIG_USART2_2STOP=0
USART6
------
Pins and Connectors::
RXD: PC7 CN5 pin2, CN10 pin 19
PA12 CN10, pin 12
TXD: PC6 CN10, pin 4
PA11 CN10, pin 14
To configure USART6 as the console::
CONFIG_STM32_USART6=y
CONFIG_USART6_SERIALDRIVER=y
CONFIG_USART6_SERIAL_CONSOLE=y
CONFIG_USART6_RXBUFSIZE=256
CONFIG_USART6_TXBUFSIZE=256
CONFIG_USART6_BAUD=115200
CONFIG_USART6_BITS=8
CONFIG_USART6_PARITY=0
CONFIG_USART6_2STOP=0
Virtual COM Port
----------------
Yet another option is to use UART2 and the USB virtual COM port. This
option may be more convenient for long term development, but is painful
to use during board bring-up.
Solder Bridges. This configuration requires:
- SB62 and SB63 Open: PA2 and PA3 on STM32 MCU are disconnected to D1
and D0 (pin 7 and pin 8) on Arduino connector CN9 and ST Morpho
connector CN10.
- SB13 and SB14 Closed: PA2 and PA3 on STM32F103C8T6 (ST-LINK MCU) are
connected to PA3 and PA2 on STM32 MCU to have USART communication
between them. Thus SB61, SB62 and SB63 should be OFF.
Configuring USART2 is the same as given above.
Question: What BAUD should be configure to interface with the Virtual
COM port? 115200 8N1?
Default
-------
As shipped, SB62 and SB63 are open and SB13 and SB14 closed, so the
virtual COM port is enabled.
Shields
=======
RS-232 from Cutedigi.com
------------------------
Supports a single RS-232 connected via::
Nucleo CN9 STM32F4x1RE Cutedigi
----------- ------------ --------
Pin 1 PA3 USART2_RX RXD
Pin 2 PA2 USART2_TX TXD
Support for this shield is enabled by selecting USART2 and configuring
SB13, 14, 62, and 63 as described above under "Serial Consoles"
Itead Joystick Shield
---------------------
See http://imall.iteadstudio.com/im120417014.html for more information
about this joystick.
Itead Joystick Connection::
--------- ----------------- ---------------------------------
ARDUINO ITEAD NUCLEO-F4x1
PIN NAME SIGNAL SIGNAL
--------- ----------------- ---------------------------------
D3 Button E Output PB3
D4 Button D Output PB5
D5 Button C Output PB4
D6 Button B Output PB10
D7 Button A Output PA8
D8 Button F Output PA9
D9 Button G Output PC7
A0 Joystick Y Output PA0 ADC1_0
A1 Joystick X Output PA1 ADC1_1
--------- ----------------- ---------------------------------
All buttons are pulled on the shield. A sensed low value indicates
when the button is pressed.
NOTE: Button F cannot be used with the default USART1 configuration
because PA9 is configured for USART1_RX by default. Use select
different USART1 pins in the board.h file or select a different
USART or select CONFIG_NUCLEO_F401RE_AJOY_MINBUTTONS which will
eliminate all but buttons A, B, and C.
Itead Joystick Signal interpretation::
--------- ----------------------- ---------------------------
BUTTON TYPE NUTTX ALIAS
--------- ----------------------- ---------------------------
Button A Large button A JUMP/BUTTON 3
Button B Large button B FIRE/BUTTON 2
Button C Joystick select button SELECT/BUTTON 1
Button D Tiny Button D BUTTON 6
Button E Tiny Button E BUTTON 7
Button F Large Button F BUTTON 4
Button G Large Button G BUTTON 5
--------- ----------------------- ---------------------------
Itead Joystick configuration settings::
System Type -> STM32 Peripheral Support
CONFIG_STM32_ADC1=y : Enable ADC1 driver support
Drivers
CONFIG_ANALOG=y : Should be automatically selected
CONFIG_ADC=y : Should be automatically selected
CONFIG_INPUT=y : Select input device support
CONFIG_INPUT_AJOYSTICK=y : Select analog joystick support
There is nothing in the configuration that currently uses the joystick.
For testing, you can add the following configuration options to enable the
analog joystick example at apps/examples/ajoystick::
CONFIG_NSH_ARCHINIT=y
CONFIG_EXAMPLES_AJOYSTICK=y
CONFIG_EXAMPLES_AJOYSTICK_DEVNAME="/dev/ajoy0"
STATUS:
2014-12-04:
- Without ADC DMA support, it is not possible to sample both X and Y
with a single ADC. Right now, only one axis is being converted.
- There is conflicts with some of the Arduino data pins and the
default USART1 configuration. I am currently running with USART1
but with CONFIG_NUCLEO_F401RE_AJOY_MINBUTTONS to eliminate the
conflict.
- Current showstopper: I appear to be getting infinite interrupts as
soon as joystick button interrupts are enabled.
Configurations
==============
f401-nsh:
---------
Configures the NuttShell (nsh) located at apps/examples/nsh for the
Nucleo-F401RE board. The Configuration enables the serial interfaces
on UART2. Support for builtin applications is enabled, but in the base
configuration no builtin applications are selected (see NOTES below).
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. By default, this configuration uses the ARM EABI toolchain
for Linux. That can easily be reconfigured, of course.:
CONFIG_HOST_LINUX=y : Builds under Linux
CONFIG_ARM_TOOLCHAIN_GNU_EABI=y : GNU EABI toolchain for Linux
3. Although the default console is USART2 (which would correspond to
the Virtual COM port) I have done all testing with the console
device configured for USART1 (see instruction above under "Serial
Consoles). I have been using a TTL-to-RS-232 converter connected
as shown below::
Nucleo CN10 STM32F4x1RE
----------- ------------
Pin 21 PA9 USART1_RX *Warning you make need to reverse RX/TX on
Pin 33 PA10 USART1_TX some RS-232 converters
Pin 20 GND
Pin 8 U5V
f411-nsh
--------
This configuration is the same as the f401-nsh configuration, except
that it is configured to support the Nucleo-F411RE.