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AN4624 Application note Getting started with the STM32 Nucleo and the M24SR expansion board X-NUCLEO-NFC01A1 Introduction This document describes how to develop a M24SR based application using the STM32 Nucleo platform and the M24SR expansion board (X-NUCLEO-NFC01A1), within the STM32Cube software environment (X-CUBE-NFC1). The M24SR expansion board is a dynamic NFC tag board with a 64kbits M24SR device and 3 LEDs. Type Firmware Tool Table 1. Applicable firmware and tool Part number X-CUBE-NFC1 X-NUCLEO-NFC01A1 December 2014 DocID027186 Rev 1 1/17 www.st.com 1

Contents Contents AN4624 1 2 3 4 5 6 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Acronyms and abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.2 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.1 Hardware description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 STM32F401RE Nucleo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.1.1 3.1.2 M24SR expansion board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Software description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 STM32Cube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.2.1 Firmware for STM32 Nucleo with X-NUCLEO-NFC01A1 expansion 3.2.2 board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Hardware software and system setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Hardware setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.3.1 3.3.2 Software setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 System setup guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.3.3 3.3 Software overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Software architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.1 STM32Cube HAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.2 4.3 Board support package (BSP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Middleware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.4 Guide for writing application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Relevant APIs for M24SR application . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.1 5.1.1 Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.1.2 Writing data to M24SR expansion board . . . . . . . . . . . . . . . . . . . . . . . . 15 Application description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.2 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2/17 DocID027186 Rev 1

AN4624 List of tables List of tables Table 1. Table 2. Table 3. Applicable firmware and tool. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Acronyms and abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 DocID027186 Rev 1 3/17 3

List of figures List of figures AN4624 Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. STM32-F4 Nucleo board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 X-NUCLEO-NFC01A1 M24SR expansion board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Keil µVision installed version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 STM32 packages for Keil µVision. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Software architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4/17 DocID027186 Rev 1

AN4624 1 References References [1]: STMicroelectronics databrief X-CUBE-NFC1, “STM32Cube expansion software for X- NUCLEO-NFC01A1 Expansion Board”. [2] STMicroelectronics databrief X-NUCLEO-NFC01A1, “Dynamic NFC tag expansion board based on M24SR for STM32 Nucleo”. DocID027186 Rev 1 5/17 16

Acronyms and abbreviations AN4624 2 Acronyms and abbreviations BSP GUI HAL I2C IDE LED Table 2. Acronyms and abbreviations Acronym Description Board support package Graphical user interface Hardware abstraction layer Inter-integrated circuit Integrated development environment Light emitting diode 6/17 DocID027186 Rev 1

AN4624 3 3.1 3.1.1 Getting started Getting started Hardware description This section describes the hardware components needed for developing a M24SR based application. The X-NUCLEO-NFC01A1 expansion board is compatible with all the STM32 Nucleo boards. In this document the STM32F401RE Nucleo board is used as an example. The following sub-sections describe the individual components. STM32F401RE Nucleo STM32F401RE Nucleo board belongs to STM32F401xD/xE family which is based on the high-performance ARM® Cortex®-M4 32-bit RISC core operating at a frequency of up to 84 MHz. The Cortex-M4 with FPU core features a single precision floating point unit (FPU) which supports all ARM single-precision data-processing instructions and data types. It also implements a full set of DSP instructions and a memory protection unit (MPU) which enhances application security. It provides an affordable and flexible way for users to try out new ideas and build prototypes with any STM32 microcontroller lines. The Arduino™ connectivity support and ST Morpho headers make it easy to expand the functionality of the Nucleo open development platform with a wide choice of specialized expansion boards. The STM32 Nucleo board does not require any separate probe as it integrates the ST-LINK/V2- 1 debugger/programmer. The STM32 Nucleo board comes with the STM32 comprehensive software HAL library together with various packaged software examples. The STM32F401RE Nucleo firmware and related documentation is available on www.st.com. Figure 1. STM32-F4 Nucleo board DocID027186 Rev 1 7/17 16

Getting started AN4624 3.1.2 M24SR expansion board The X-NUCLEO-NFC01A1 is a dynamic NFC tag expansion board usable with the STM32 Nucleo system. It is also compatible with Arduino UNO R3 connector layout, and is designed around the STMicroelectronics M24SR dynamic tag. The X-NUCLEO-NFC01A1 interfaces with the STM32 MCU via I2C. Figure 2. X-NUCLEO-NFC01A1 M24SR expansion board 8/17 DocID027186 Rev 1

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