ST CR95HF Application Note

AN3954
Application note
Developing your own Visual Basic or C/C++ application
on a CR95HF demonstration board
Introduction
This application note explains how to develop an application using either Visual Basic or
C/C++ language to drive a CR95HF demonstration board from a host computer.
CR95HF demonstration board is a kit that allows the user to evaluate the performance of
STMicroelectronics CR95HF, a 13.56 MHz multiprotocol contactless transceiver. It includes
a ready-to-use board to interface with the CR95HF host PC demonstration software through
an USB interface. The CR95HF demonstration board is included in the M24LR-
DISCOVERY kit (see Figure 1).
The board is powered through the USB port, and no external power supply is required. It is
made up of a CR95HF, a 48 mm x 34 mm, 13.56 MHz inductive etched antenna and its
associated tuning components. The CR95HF communicates with the STM32F103CB 32-bit
core microcontroller via the SPI bus.
A dynamic link library (DLL) file is used by the host computer to manage several functions
and to communicate with both the STM32 MCU and the CR95HF
Source code examples described in this application note and additional demonstrations can
be found in the package STSW-95HF002, which can be downloaded from www.st.com.
Some basic examples are available in C/C++, additional examples are available in a Visual
Basic 6 project, among them NDEF message management on Type 4A and Type 5,
ST25DV user interface and FTM demonstrations. DLL file is also available in this package.

Figure 1. CR95HF demonstration board embedded in the M24LR-Discovery kit

For more information, refer to the following documents, available on www.st.com:
• M24LR-DISCOVERY databrief
• CR95HF datasheet
• User manual UM1084 "CR95HF development software"
• STSW-95HF002 source code example
January 2017 Doc ID022016 Rev 4 1/47
www.st.com 1