Need Help Using ST25R3911DISCOComm dll With Python
Hello ST Team
I am using the ST25R3911B-DISCO board with an ST25DV16KC tag.
I am trying to communicate with the tag directly from Python using the ST25R3911DISCOComm.dll from STSW-ST25R001.
My setup is:
ST25R3911B-DISCO
ST25DV16KC
Windows PC
Python 3.13
ctypes
The DLL loads successfully.
Reader connection works correctly.
RF initialization works correctly.
These APIs return success:
rfalInitialize
iso14443aInit
rfalFieldOnAndStarGT
checkConnection
The ST GUI software works correctly and can:
detect the tag
select the tag
read UID
read tag data
From Python I cannot:
detect the tag
select the tag
read UID
read memory
The DLL exports these APIs:
iso14443aSelect
iso14443aRATS
iso14443aPPS
txrxBytes
nfcTxNBytes
nfcRxNBytes
rfalStartTransceive
rfalTransceiveBlockingTx
rfalTransceiveBlockingRx
rfalTransceiveBlockingTxRx
rfalISO14443ATransceiveShortFrame
rfalISO14443ATransceiveAnticollisionFrame
rfalIsoDepInitialize
rfalIsoDepStartApduTransceive
pollInterrupt
Observed issues:
iso14443aSelect causes access violation.
t2tRead4Pages returns:
Read Result 6
RX Length 0
pollInterrupt runs but never detects the tag.
I believe the issue is that I do not know the correct function signatures and required structures for the DLL APIs.
Could ST please provide:
documentation or header files for ST25R3911DISCOComm.dll
correct function prototypes
example for Python ctypes usage
example for ST25DV16KC detection and UID read
Thank you
