boards/96boards/aerocore2/doc/index.rst
.. zephyr:board:: 96b_aerocore2
96Boards Aerocore2 ##################
Overview
The 96Boards Aerocore2 Mezzanine is based on the STMicroelectronics STM32F427VIT6 Cortex-M4 CPU primarily designed for use in drones. This board acts as a mezzanine platform for all 96Boards CE compliant boards. It can also be used as a standalone board.
.. figure:: img/96b_aerocore2.jpg :align: center :alt: 96Boards Aerocore2
96Boards Aerocore2
Hardware
96Boards Aerocore2 provides the following hardware components:
More information about STM32F427VIT6 can be found here:
STM32F427 on www.st.com_.. zephyr:board-supported-hw::
Octal PWM Header (J1)
+-------+-------------+-------------------------+-------+-------------+-------+-------------+ | PIN # | Signal Name | STM32F427 Functions Pin | PIN # | Signal Name | Pin # | Signal Name | +=======+=============+=========================+=======+=============+=======+=============+ | 1 | PWM4_CH1 | PD12 | 2 | 5.0v | 3 | GND | +-------+-------------+-------------------------+-------+-------------+-------+-------------+ | 4 | PWM4_CH2 | PD13 | 5 | 5.0v | 6 | GND | +-------+-------------+-------------------------+-------+-------------+-------+-------------+ | 7 | PWM4_CH3 | PD14 | 8 | 5.0v | 9 | GND | +-------+-------------+-------------------------+-------+-------------+-------+-------------+ | 10 | PWM4_CH4 | PD15 | 11 | 5.0v | 12 | GND | +-------+-------------+-------------------------+-------+-------------+-------+-------------+ | 13 | PWM5_CH1 | PA0 | 14 | 5.0v | 15 | GND | +-------+-------------+-------------------------+-------+-------------+-------+-------------+ | 16 | PWM5_CH2 | PA1 | 17 | 5.0v | 18 | GND | +-------+-------------+-------------------------+-------+-------------+-------+-------------+ | 19 | PWM5_CH3 | PA2 | 20 | 5.0v | 21 | GND | +-------+-------------+-------------------------+-------+-------------+-------+-------------+ | 22 | PWM5_CH4 | PA3 | 23 | 5.0v | 24 | GND | +-------+-------------+-------------------------+-------+-------------+-------+-------------+
IO Header J11
+-------+-------------+-------+-------------+ | PIN # | Signal Name | PIN # | Signal Name | +=======+=============+=======+=============+ | 1 | PB9 | 2 | PB8* | +-------+-------------+-------+-------------+ | 3 | PC9 | 4 | PB0 | +-------+-------------+-------+-------------+ | 5 | PE5 | 6 | NA | +-------+-------------+-------+-------------+ | 7 | PE6 | 8 | NA | +-------+-------------+-------+-------------+ | 9 | PC6 | 10 | NA | +-------+-------------+-------+-------------+ | 11 | PC7 | 12 | NA | +-------+-------------+-------+-------------+ | 13 | PC8 | 14 | NA | +-------+-------------+-------+-------------+ | 15 | PA8 | 16 | GND | +-------+-------------+-------+-------------+ | 17 | PA9 | 18 | 3v3 | +-------+-------------+-------+-------------+ | 19 | PA10 | 20 | GND | +-------+-------------+-------+-------------+
IO Header J5
+-------+-------------+-------------------------+-------+-------------+-------------------------+ | PIN # | Signal Name | STM32F427 Functions Pin | PIN # | Signal Name | STM32F427 Functions Pin | +=======+=============+=========================+=======+=============+=========================+ | 1 | AGND | AGND | 2 | ADC1_13 | PC3 | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 3 | ADC1_12 | PC2 | 4 | ADC1_11 | PC1 | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 5 | I2C_SDA | PB11 | 6 | GND | GND | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 7 | I2C_SCL | PB10 | 8 | VCC 3v3 | VCC 3v3 | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 9 | NC | NC | 10 | NC | NC | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 11 | NC | NC | 12 | NC | NC | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 13 | UART_TX 7 | PE8 | 14 | GND | GND | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 15 | UART_RX 7 | PE7 | 16 | GND | GND | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 17 | UART_TX 2 | PD5 | 18 | GND | GND | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 19 | UART_TX 2 | PD6 | 20 | GND | GND | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 21 | NC | NC | 10 | NC | NC | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 23 | NC | NC | 10 | NC | NC | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 25 | SPI1_NIRQ | PC5 | 26 | GND | GND | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 27 | SPI1_CLK | PA5 | 28 | SPI1_MISO | PA6 | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 29 | SPI1_CS0 | PA4 | 30 | SPI1_MOSI | PA7 | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 31 | CAN_TX | PD1 | 32 | CANH | NC | +-------+-------------+-------------------------+-------+-------------+-------------------------+ | 33 | CAN_RX | PD0 | 34 | CANL | NC | +-------+-------------+-------------------------+-------+-------------+-------------------------+
GPS connector J15
+-------+-------------+-------------------------+ | PIN # | Signal Name | STM32F427 Functions Pin | +=======+=============+=========================+ | 1 | V_OUT 5v | NC | +-------+-------------+-------------------------+ | 2 | UART1_TX | PB6 | +-------+-------------+-------------------------+ | 3 | UART1_RX | PB7 | +-------+-------------+-------------------------+ | 4 | VCC 3v3 | NC | +-------+-------------+-------------------------+ | 5 | GND | GND | +-------+-------------+-------------------------+
Spektrum connector J3
+-------+-------------+-------------------------+ | PIN # | Signal Name | STM32F427 Functions Pin | +=======+=============+=========================+ | 1 | VCC 3v3 | NC | +-------+-------------+-------------------------+ | 2 | GND | GND | +-------+-------------+-------------------------+ | 3 | UART8_RX | PE0 | +-------+-------------+-------------------------+
STM32F4 has one external oscillator. The frequency of the clock is 32.768 kHz. The internal 16MHz clock is used as the main clock.
96Boards Aerocore2 board has up to 4 U(S)ARTs. The Zephyr console output is assigned to USART7. Default settings are 115200 8N1.
96Boards Aerocore2 board has 1 I2C port. The default I2C mapping for Zephyr is:
96Boards Aerocore2 board has 1 SPI port. The default SPI mapping for Zephyr is:
96Boards Aerocore2 board has a USB OTG dual-role device (DRD) controller that supports both device and host functions through its mini "OTG" USB connector. Only USB device functions are supported in Zephyr at the moment.
Programming and Debugging
There are 2 main entry points for flashing STM32F4X SoCs, one using the ROM
bootloader, and another by using the SWD debug port (which requires additional
hardware). Flashing using the ROM bootloader requires a special activation
pattern, which can be triggered by using the BOOT0 pin. The ROM bootloader
supports flashing via USB (DFU), UART, I2C and SPI. You can read more about
how to enable and use the ROM bootloader by checking the application
note AN2606_, page 109.
It is recommended to use at least v0.8 of dfu-util_. The package available in
debian/ubuntu can be quite old, so you might have to build dfu-util from source.
Connect the micro-USB cable to the USB OTG/STM_CONSOLE Aerocore2 port and to your computer. The board should power ON. Force the board into DFU mode by keeping the BOOT0 switch pressed while pressing and releasing the RST switch.
The BOOT button is located at the back-side of the PCB.
Confirm that the board is in DFU mode:
.. code-block:: console
$ sudo dfu-util -l dfu-util 0.8 Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc. Copyright 2010-2014 Tormod Volden and Stefan Schmidt This program is Free Software and has ABSOLUTELY NO WARRANTY Please report bugs to [email protected] Found DFU: [0483:df11] ver=2200, devnum=15, cfg=1, intf=0, alt=3, name="@Device Feature/0xFFFF0000/01004 e", serial="3574364C3034" Found DFU: [0483:df11] ver=2200, devnum=15, cfg=1, intf=0, alt=2, name="@OTP Memory /0x1FFF7800/01512 e,01016 e", serial="3574364C3034" Found DFU: [0483:df11] ver=2200, devnum=15, cfg=1, intf=0, alt=1, name="@Option Bytes /0x1FFFC000/01016 e", serial="3574364C3034" Found DFU: [0483:df11] ver=2200, devnum=15, cfg=1, intf=0, alt=0, name="@Internal Flash /0x08000000/04016Kg,01064Kg,03*128Kg", serial="3574364C3034" Found Runtime: [05ac:8290] ver=0104, devnum=2, cfg=1, intf=5, alt=0, name="UNKNOWN", serial="UNKNOWN"
You should see following confirmation on your Linux host:
.. code-block:: console
$ dmesg usb 1-2.1: new full-speed USB device number 14 using xhci_hcd usb 1-2.1: New USB device found, idVendor=0483, idProduct=df11 usb 1-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-2.1: Product: STM32 BOOTLOADER usb 1-2.1: Manufacturer: STMicroelectronics usb 1-2.1: SerialNumber: 3574364C3034
Then build and flash an application. Here is an example for the
:zephyr:code-sample:hello_world application.
.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: 96b_aerocore2 :goals: build flash
Connect a USB-TTL dongle to the UART_7 header port and to your computer. Run your favorite terminal program to listen for output.
.. code-block:: console
$ minicom -D <tty_device> -b 115200
Replace :code:<tty_device> with the port where the board 96Boards Aerocore2
can be found. For example, under Linux, :code:/dev/ttyUSB0.
The -b option sets baud rate ignoring the value from config.
Press the Reset button and you should see the following message in your terminal:
.. code-block:: console
Hello World! arm
.. _STM32F427 on www.st.com: https://www.st.com/en/microcontrollers-microprocessors/stm32f427vi.html
.. _dfu-util: http://dfu-util.sourceforge.net/build.html