Arduino Nicla Vision
Overview
Arduino Nicla Vision is a development board by Arduino based on the STM32H747GAII, a dual core ARM Cortex-M7 + Cortex-M4 MCU, with 2MBytes of Flash memory and 1MB SRAM.
The board features:
RGB LED
Reset Boot button
USB device
Murata Type 1DX Bluetooth + WiFi module (CYW4343W based)
GC2145 2 Megapixel Camera Sensor
SE050C2HQ1 Crypto IC
MP34DT06JTR Omnidirectional Microphone
VL53L1CBV0FY ToF Sensor
LSM6DSOXTR Gyro+Accelerometer Sensor
More information about the board, including the datasheet, pinout and schematics, can be found at the Arduino Nicla Vision website.
More information about STM32H747GAII6 can be found here:
Supported Features
The current Zephyr arduino_nicla_vision/stm32h747xx/m7 board configuration supports the
following hardware features:
Interface |
Controller |
Driver/Component |
|---|---|---|
NVIC |
on-chip |
nested vector interrupt controller |
UART |
on-chip |
serial port-polling; serial port-interrupt |
PINMUX |
on-chip |
pinmux |
GPIO |
on-chip |
gpio |
FLASH |
on-chip |
flash memory |
RNG |
on-chip |
True Random number generator |
I2C |
on-chip |
i2c |
SPI |
on-chip |
spi |
DCMI |
on-chip |
Parallel Camera interface |
IPM |
on-chip |
virtual mailbox based on HSEM |
RADIO |
Murata 1DX |
WiFi and Bluetooth module |
And the arduino_nicla_vision/stm32h747xx/m4 has the following
support from Zephyr:
Interface |
Controller |
Driver/Component |
|---|---|---|
NVIC |
on-chip |
nested vector interrupt controller |
UART |
on-chip |
serial port-polling; serial port-interrupt |
PINMUX |
on-chip |
pinmux |
GPIO |
on-chip |
gpio |
Other hardware features are not yet supported on Zephyr port.
Fetch Binary Blobs
The board Bluetooth/WiFi module requires fetching some binary blob files, to do that run the command:
west blobs fetch hal_infineon
Note
Only Bluetooth functionality is currently supported.
Resources sharing
The dual core nature of STM32H747 SoC requires sharing HW resources between the two cores. This is done in 3 ways:
Compilation: Clock configuration is only accessible to M7 core. M4 core only has access to bus clock activation and deactivation.
Static pre-compilation assignment: Peripherals such as a UART are assigned in devicetree before compilation. The user must ensure peripherals are not assigned to both cores at the same time.
Run time protection: Interrupt-controller and GPIO configurations could be accessed by both cores at run time. Accesses are protected by a hardware semaphore to avoid potential concurrent access issues.
Programming and Debugging
Applications for the arduino_nicla_vision board should be built per core target,
using either arduino_nicla_vision/stm32h747xx/m7 or arduino_nicla_vision/stm32h747xx/m4 as the target.
See Building an Application for more information about application builds.
Flashing
This board can be flashed either using dfu-util, or with an external debugging probe, such as a J-Link or Black Magic Probe, connected to the on board MIPI-10 SWD port marked as “JTAG”.
Note
The board ships with a custom Arduino bootloader programmed in the first
flash page that can be triggered by double clicking the RST button. This
bootloader is USB-DFU compatible and supports programming both the internal
and external flash and is the one used by west flash by default.
First, connect the Arduino Nicla Vision board to your host computer using the USB
port to prepare it for flashing. Double click the RST button to put the
board into the Arduino Bootloader mode. Then build and flash your application.
Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b arduino_nicla_vision/stm32h747xx/m7 samples/hello_world
west flash
Run a serial host program to connect with your board:
$ minicom -D /dev/ttyACM0
You should see the following message on the console:
Hello World! arduino_nicla_vision
Similarly, you can build and flash samples on the M4 target.
Here is an example for the Blinky application on M4 core.
# From the root of the zephyr repository
west build -b arduino_nicla_vision/stm32h747xx/m4 samples/basic/blinky
west flash
Debugging
Debugging is supported by using west debug with an external probe such as a
J-Link or Black Magic Probe, connected to the on board through the edge eslov pins
as “SWD”. For example:
west debug -r jlink