AN3955 datasheet(48/68 Pages) STMICROELECTRONICS

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SRIX4K library

AN3955

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Doc ID 022017 Rev 1

SRIX4K library

For a brief description of SRIX4K library, refer to Section 3.3: SRIX4K product overview.

The SRIX4K library is composed of:

●

the lib_SRX4K.c source file

●

the lib_SRX4K.h include file

This library is valid for all SRIX series.

6.1

SRIX4K command format

The SRIX4K is compliant with the frame format specified in Section 5.2.1: ISO/IEC 14443-3

Type B command format.

6.1.1

SRIX4K CR16 management

The ISO/IEC 14443-3 Type B specification defines a two-byte CRC. It is appended to RF

commands to check the data transmission between CR95HF and a contactless tag.

The CRC is managed by the first bit of parameter byte of ProtocolSelect (CR95HF layer)

command. If it is set, the CR95HF appends the CRC to RF commands.

The SRIX4K_ProtocolSelect function sets this function, so the CR95HF manages the

CRC.

6.1.2

Functions of SRIX4K layer

The SRIX4K_ProtocolSelect function permits to configure the CR95HF to

communicate with an SRI contactless tag.

Table 73describes the SRIX4K_ProtocolSelect function.

Table 73.

SRIX4K_ProtocolSelect function description

Table 74 lists the functions of this layer which emit a command described in SRIX4K

datasheet.

Table 74.

Commands included in the lib_SRIX4k.c file

For more information, refer to the SRIX4K datasheet.

SRIX4K_ProtocolSelect

Configures CR95HF to communicate with an SRI contactless tag.

Function

Description

SRIX4K_Initiate

Sends an Initiate command to a contactless tag.

SRIX4K_Pcall16

Sends an Pcall16 command to a contactless tag.

SRIX4K_SlotMarker

Sends a SlotMarker command to a contactless tag.

SRIX4K_SelectChipID

Sends a SelectChipID command to a contactless tag.

SRIX4K_Completion

Sends a Completion command to a contactless tag.

SRIX4K_ResetToInventory

Sends a ResetToInventory command to a contactless tag.

SRIX4K_ReadSingleBlock

Sends a ReadSingleBlock command to a contactless tag.

SRIX4K_WriteSingleBlock

Sends a WriteSingleBlock command to a contactless tag.

SRIX4K_GetUID

Sends a GetUID command to a contactless tag.

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