read the inventory of ISO15693 tag with ST25R3916

[Klab_dev]

Hello,

I am in the process of obtaining the inventory information of ISO15693 tag using ST25R3916.

But the data received seems not normal, so I want to get help..

My register settings are as follows

Dircet_Command(SET_Default);

Register_Write(IO_configuration1, 0x04); // IO Configuration1 register Write 0x04

Register_Write(IO_configuration2, 0x84); // IO Configuration2 register Write 0x84

Register_Write(Bit_rate_definition, 0x00); // Bit Rate Defintion register Write 0x00

Register_Write(Stream_mode_definition, 0x18); // Stream Mode definition register Write 0x18

Register_Write(Mode_defintion,0x74); // Mode Defintion register Write 0x74

Register_Write(Operation_control,0xC8); // Operation control register Write 0xC8

FIFO_load(FIFO_TX,CMD_BUF); //FIFO Buf Wirte CMD_BUF

(Write to the register as long as the buffer length)

Register_Write(Number_of_transmitted_bytes1,len);

Register_Write(Number_of_transmitted_bytes2,len);

Dircet_Command(Transmit_without_CRC); //Send data stored in FIFO Buff

The actual commands sent are as follows.

( 0x21, 0x26, 0x01, 0x00, 0xF6, 0x0A, 0x04 ) //Commands to be Transmitted

static uint8_t TXReadUID[22]=

{0x21,0x20,0x08,0x20,0x02,0x08,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x20,0x08,0x80,0x80,0x20,0x20,0x02,0x02,0x04};  

uint8_t message_length = 22;

This command is the CMD of ISO15693, which converts the Inventory request command to the 4_1 format.

After sending the command, wait for a response from the while statement.

while(1){

if(Register_Read(Main_interrupt) & 0x10){

FIFO_Read = 0x9F;

HAL_SPI_TransmitReceive(&hspi2,FIFO_Read,rx_buffer,fifo_len,1000);

}

}

Receive Data = [ 11 A2 88 28 22 45 84 84 10 41 08 11 42 48 08 21 11 84 88 28 85 A2 48 44 10 ]

As a result of referring to the provided library, it was confirmed that ISO15693 communication decodes the received data

I tried to decode the data using the function rfalIso15693VICCDcode() in the library's rfal_iso15693_2.c file, but it did not work properly

I'd like to know if there's anything wrong with the register settings

[Brian TIDAL]

Hi,

---

@Klab_dev wrote:

but it did not work properly

---

What is the return code of rfalIso15693VICCDecode?

I would recommend to use the RFAL library that implements the various NFC activities and provides some ready to use demos.

Rgds

BT

[Klab_dev]

The return code for the rfalIso15693VICCDcode is RFAL_ERR_RF_COLLISION (0x29)

It seems to me that it's a bit-collision error

I think this problem is caused by data deterioration in the process of receiving it
So I want to check if the register value I set is wrong

We can't use the RFAL library because of circumstances

[Ulysses HERNIOSUS]

Hi,

With the first byte of received data being 11h I would expect an ERR_FRAMING due to

   if ((inBuf[0] & 0x1fU) != 0x17U)
    {
                ISO_15693_DEBUG("0x%x\n", iso15693PhyBitBuffer[0]);
                return RFAL_ERR_FRAMING;

and not a collision error!

Otherwise please check and compare the various registers - especially MRT, but also NRT and the values of the registers ST25R3916_REG_AUX, ST25R3916_REG_RX_CONF1..4 and ST25R3916_REG_CORR_CONF1..2

BR, Ulysses