AN3955 datasheet(62/68 Pages) STMICROELECTRONICS

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Project example

AN3955

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Doc ID 022017 Rev 1

7.3.1

Standard peripheral drivers

The Keil µvision® project was built from the MCD standard peripheral library

(StdPeriph_Driver). It can be downloaded from the STMicroelectronics internet site at

http://www.st.com.

It is used to drive all the peripherals used by your application.

7.3.2

Drivers

Some complementary drivers were developped for this application. They are grouped

together in the User Drivers directory:

●

drv_UART

: driver on UART serial interface for the communication to CR95HF. The

MCU can communicate with CR95HF using either UART or SPI serial interface.

●

drv_SPI

: driver on SPI serial interface for the communication with CR95HF

●

drv_lcd

: driver of LCD of STM3210B-EVAL board

●

drv_LED

: driver of LED of STM3210B-EVAL board

●

drv_CR95HF

: driver of CR95HF. This driver groups functions linked to MCU hardware.

(the function to configure the GPIO of the MCU).

7.3.3

Libraries

The libraries used in this project are:

●

CR95HF library

●

ISO/IEC 14443_A library

●

ISO/IEC 14443_B library

●

SRIX4K library

The libraries are independent of the hardware and can be reused on a different board.

Furthermore, the lib-fonts.c library defines the test fonts for LCD drivers.

7.4

Application functions

The application is intended to handle three kinds of contactless tag:

●

ISO/IEC 14443-3 Type A contactless tag (function User_Get14443ATag())

●

ISO/IEC 14443-3 Type B contactless tag (function User_Get14443ATag())

●

SRIx contactless tag (function USer_Get14443SRTag())

The end of the infinite loop turns off the RF field (function CR95HF_FieldOff()).

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