![]() This allows the card to be used in other projects which require greater connectivity. This helps us to debug software easily and to use those outputs when some shields don’t pass-through.ĬN7 and CN10 connectors pins are not connected to Arduino compatible connector and they provide other proprietary I/O or power connector typical of STM32 microcontrollers. In figure Arduino pinout is shown in purple, while the Morpho pinout is in blue: notice how all Arduino pins are remapped exactly on Morpho inner pin strip (connectors CN7 and CN10): this allows us to always have access to Arduino pinout also once a shield is plugged on the board. Externally, however, two double strips of male contacts (one per side) are what STM calls “Morpho” pinout, used on other STM development boards. One of the first aspects that we can note is the presence of many contacts on card’s border, including the now famous female contacts connector compatible with the Arduino shield. Each NUCLEO board differs for performances, power consumption, clock frequency and flash memory capacity of the STM32 microcontroller in figure.įrom here on, we will analyze the NUCLEO model F401 and we will move our first programming steps, but many of the aspects and features that we will see later will be valid for any other NUCLEO board. The whole series of NUCLEO development boards is equipped with a STM32 microcontroller based on ARM Cortex-M family, adopting a 32-bit RISC architecture. The board name comes from the microcontroller mounted on the board ( STM32F401) which is its heart. We will also see how to program it and test it by using some development environments available and a first sample program. ![]() In this post we will examine the NUCLEO F401RE board that is among the best performing in the series, not only because it is based on an ARM processor with a 84 MHz clock, a 512 Kb flash memory and an integrated floating-point unit, but also for a number of interesting features that we will see together. Some of these boards are simple clones, other are at much higher level having better performances and memory storage.Īmong those, a really interesting solution is represented by the development boards family called NUCLEO made by STMicroelectronics, a semiconductors leader company. The success of Arduino and its countless shields, kicked off in recent years the birth of several compatible development boards designed to help us creating in a short time, at low cost and easily, great and even complex electronic applications. See Matrix of tested boards.Today we present the first steps with the NUCLEO development boards, produced by STMicroelectronics, that can help us to move towards the ARM 32-bit world with simplicity and great performances, keeping a compatibility with Arduino expansion connectors so that we can use its commonly available shields. ![]() mbed-dev library in (source files of the mbed library used on mbed compiler IDE).ARMmbed/mbed-os repository on GitHub ( up-to-date version, used with mbed CLI commands).You can find more details on the available pins and labels in the PeripheralPins.c and PinNames.h files. Mass storage (USB Disk drive) for drag'n'drop programming.USB re-enumeration capability: three different interfaces supported on USB.USB VBUS or external source (3.3 V, 5 V, 7 - 12 V).Selection-mode switch to use the kit as a standalone ST-LINK/V2-1.On-board ST-LINK/V2-1 debugger/programmer with SWD connector.STMicroelectronics Morpho extension pin headers for full access to all STM32 I/Os.RTC: subsecond accuracy, hardware calendar.USB 2.0 full-speed device/host/OTG controller with on-chip PHY.Low power: Sleep, Stop and Standby modes.32 kHz oscillator for RTC with calibration.1.7 V to 3.6 V application supply and I/Os.LCD parallel interface, 8080/6800 modes.ARM®32-bit Cortex®-M4 + FPU + ART Accelerator™.The STM32 Nucleo-144 board does not require any separate probe, as it integrates the ST-LINK/V2-1 debugger/programmer and it comes with the STM32 comprehensive software HAL library, together with various packaged software examples, as well as a direct access to the ARM®mbed™online resources. The ST Zio connector, which is an extension of Arduino™ Uno, provides access to more peripherals and ST morpho headers make it easy to expand the functionality of the Nucleo open development platform with a wide choice of specialized shields. The STM32 Nucleo-144 board provides an affordable and flexible way for users to try out new concepts and build prototypes with the STM32 microcontroller, choosing from the various combinations of performance, power consumption and features.
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