AN3224 datasheet(28/49 Pages) STMICROELECTRONICS

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RF ISO 15693 High-level commands

AN3224

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Doc ID 17559 Rev 2

5.2

RF ISO 15693 High-level Inventory command

To issue an RF ISO 15693 High-level Inventory command, send the FEISC_0xB0_ISOCmd

function with the strReqData set to ‘0100’ (Inventory request).

At the end of an inventory request, all the transponders are put in Quiet mode (ISO 15693

“STAY QUIET”). To be able to communicate with the detected transponder. A “RESET TO

READY” RF request must be issued.

Below are code examples in Visual Basic and C/C++.

5.2.1

Example of High-level Inventory command

Visual Basic source code

Private Function Cmd_Inventory_FEIG() As Boolean

Dim strReqData As String

Dim lngReqDataLen As Long

Dim lngRspLength As Long

Dim strRespData As String * 512

Dim lngRespDataLen As Long

Dim lngStatus As Long

Dim i As Long

Dim lngTranspNumber

As Long

Dim strtransponder As String

'init display

‘txtInventoryRF_answer.Text = ""

‘For i = 0 To 2

‘

txtTransponderUID(i).Text = ""

‘

txtTransponderDSFID(i).Text = ""

‘Next i

' Inventory request Host mode : 0x0100

strReqData = "0100"

lngReqDataLen = Len(strReqData)

' FEIG USB INVENTORY request in Host mode

lngStatus = FEISC_0xB0_ISOCmd(lngAttachedDeviceHandle(0), &HFF, _

strReqData, lngReqDataLen, strRespData, _

lngRespDataLen, 1)

' RF INVENTORY REQUEST RESULT

' if(lngStatus = 0) then PASS else FAIL

' if (lngRespDataLen = 0) then No transponder answer

' else strRespData contains the transponder(s) answer(s)

If (lngRespDataLen = 0) Then

Cmd_Inventory_FEIG = False

‘txtInventoryRF_answer.Text = "No Tag answer detected"

Else

lngTranspNumber = CLng("&h" & Mid(strRespData, 1, 2))

If (lngRespDataLen > 1 And lngTranspNumber > 3) Then

Cmd_Inventory_FEIG = False

‘Too much Tags detected :

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