AN3224 datasheet(33/49 Pages) STMICROELECTRONICS

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AN3224

RF ISO 15693 Transparent commands

Doc ID 17559 Rev 2

33/49

6.1

FEISC_0xBF_ISOTranspCmd general description

Table 15 and Table 16 give the description of the FEISC_0xBF_ISOTranspCmd function in

Visual Basic and C/C++.

Table 15.

FEISC_0xBF_ISOTranspCmd Visual Basic prototype

Function description

Prototype

IngStatus =

FEISC_0xBF_ISOTranspCmd(lngAttachedDeviceHandle(1),&hFF,

M, lngRspLength, strReqData,

lngReqDataLen,strRespData,lngRespDataLen,N)

Parameters

IngAttachedDeviceHandle(1): USB reader handle which has been filled in

after the reader detection process (FEISC_NewReader function).

&hFF: Communication address.

M: Mode. The method used by the Transparent command to detect the

transponder answer depends on the mode.

1: answer detected after reception of a Read request

2: answer detected after reception of a Write request with Option_flag = 0.

3: answer detected after reception of a Write request with Option_flag = 1.

4: answer detected after reception of an Inventory request

lngRspLength: Expected RF answer size (bit number)

strReqData: RF request frame to be sent to the reader

lngReqDataLen: RF request frame length (strReqData)

strRespData: Transponder answer (if any). This variable is filled after the

USB request is issued. Before sending any USB request, strRespData must

be formatted as follows:

Dim strRespData As String * 512

lngRespDataLen: strRespData length (0 if no answer)

N: Format of all the parameters passed to the function

0: ASCII.

Example: ‘2356’ corresponds to the string ‘#V’ composed of 2 ASCII

codes.

1: Characters.

Example: ‘2356’ corresponds to 4 characters (2, 3, 5, 6)

2: Hexadecimal.

Example: ‘2356’ corresponds to 2 bytes (&h23 and &h56)

Returned value

lngStatus: error code

0: USB request transmission successful

1: USB request transmission failed

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