Each NUCLEO board differs for performances, power consumption, clock frequency and flash memory capacity of the STM32 microcontroller in figure.Īll the boards, however, have the same layout and the same form, which is shown in next 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. This parameter is only available in STM32F446xx devices.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. Uint32_t PLLR /*!< PLLR: PLL division factor for I2S, SAI, SYSTEM, SPDIFRX clocks. This parameter must be a number between Min_Data = 4 and Max_Data = 15 */ Uint32_t PLLQ /*!< PLLQ: Division factor for OTG FS, SDIO and RNG clocks. This parameter must be a value of RCC_PLLP_Clock_Divider */ Uint32_t PLLP /*!< PLLP: Division factor for main system clock (SYSCLK). This parameter must be a number between Min_Data = 192 and Max_Data = 432 */ Uint32_t PLLN /*!< PLLN: Multiplication factor for PLL VCO output clock. This parameter must be a number between Min_Data = 0 and Max_Data = 63 */ Uint32_t PLLM /*!< PLLM: Division factor for PLL VCO input clock. This parameter must be a value of RCC_PLL_Clock_Source */ Uint32_t PLLSource /*!< RCC_PLLSource: PLL entry clock source.
This parameter can be a value of RCC_PLL_Config */ Uint32_t PLLState /*!< The new state of the PLL. *note that RCC_PLLInitTypeDef in stm32f4xx_hal_RCC_ex.h RCC_PLL_ON PLLSource=RCC_PLLCFGR_PLLSRC_HSE PLLM=8 PLLN=336 PLLP=2 PLLQ=7 } Rcc_systemclock=HAL_RCC_GetSysClockFreq() Uint32_t rcc_systemclock,SystemCore_Clock to check the value of system clock by stm studioĮnabling high speed the external clock crystal clock
I am just knowing how to deal with stm(nucleo board f401re ) i use COIDE and i follow all instructions of hse enable to active stm32f401 at 84MHZ oscillator i check the board too for sure that SB55 OFF and SB54 ON & SB16 and SB50 ON but it give me also 16MHz system clock could any one told me what is wrong in my code