Thanks for the quick reply.
2) Will go though the datasheet as suggested and come back if I have more questions. I did see the official support up to 848 in the datasheet.
3) My MB firmware version is 1.1.0. This was observed at our PICC end when the PPS frame is sent over. I traced this into the GUI source code and cross checked with the actual call in dispatcher.c. What I found out the GUI sends this in
void Iso14443aTab::on_pps_pb_clicked()
{
ST25R391xComError err;
QByteArray answer;
err = this->com->iso14443aPPS(this->cid_cb->currentText().toInt(),
this->dr_cb->currentText().toInt(),
this->ds_cb->currentText().toInt(),
change_send_and_receive_data_rate_cb->isChecked(),
answer);
// send answer to main window
emit mainWindowDisplayMessage(QString("PPS[%1]->").arg(com->decodeFWError(err)) + answer.toHex());
if ( ST25R391xComError::NoError == err )
{
}
else
{
}
pps_dc_gb ->setEnabled(false); // disable after first time
}
But the dispatcher.c expects this
case ISODEP_CMD_PPS:
OutSize = sizeof(rfalIsoDepPpsRes);
if ( (BuffInSize == 3) && ( OutSizeMax == OutSize) )
{
err = rfalIsoDepPPS ( buf[0] /* DID*/, (rfalBitRate) buf[1] /*DSI*/, (rfalBitRate) buf[2] /* DRI */, (rfalIsoDepPpsRes *) (txData));
}
break;
Note that the DSI/DRI parameters have been swapped when calling into the firmware. As mentioned then I changed the reader bitrate to match that in debug/modeandspeed.
4) Noted, I traced the bit settings through the Register Map via the Debug tab and noted that the demodulators are changed when bitrate is changed.
5) At the moment we are unable to transmit higher than 212 to our PICC. The reader is able to receive at all speeds (106,212,424,848) so I'm assuming the demodulation config is working ok. We are also trying to tweak our antenna and coil design on the PICC end to see if that is the limiting factor.
What I noticed is that the ST25R3916 switches from OOK to AM (with default modulation depth of 12%) for bitrates higher than 106. Some of the quick tweaks I have done on the reader transmit parameter side but did not improve things. I did this through the Register Map.
a. I manually switched it to OOK (Mode definition register, 0x03H) , while keeping other default settings.
b. Increased modulation depth (TX driver register, 0x28H) -- AM modulation mode.
c. Increased modulation pulse width (ISO14443A and NFC 106kb/s settings register, 0x05H) , while keeping other default settings.
Thank you.
