Are there any plans to make libnfc do something like buffer incoming data and pull out responses as available? Any suggestions? Thanks!

For example in pn532_uart_send do something like?

  if (pn53x_check_ack_frame (pnd, abtRxBuf, sizeof(abtRxBuf))) {
    // The PN53x is running the sent command
  } else {
      // ******  try resending up to 3 times
      pn532_uart_send_helper(pnd, pbtData, szData, attempts+1);

      return false;
  }

As one wrinkle, I don't think it should do this during serial autoprobing, so a mechanism would also be need to be added to disable retries.

Also, would it be OK to return different error codes for the different failures and have a method that can convert the error code to text to be able to display what command failed (even when logging is turned off)?

Any thoughts? Thanks!

This could e.g. be used to establish a Bluetooth connection between phone and PC and use Bluetooth to transfer further data.

The Android documentation speaks of an "NDEF push protocol" and a URI: com.android.npp that any device would have to implement that wants to converse with an Android phone.

What's this "NDEF push protocol"? The googletubes wouldn't reveal much about this.

What role does the URI play in this protocol?

In this protocol a feature that can be added to libnfc?

Thanks for clarifications.

I'm currently working on a project which involves NFC. I'm planning right now to use libnfc, but I have not found any support for I2C or SPI. I have other protocols available on my platform, but I would really prefer I2C or SPI instead.

Have anybody here on this forum successfully implemented a combination of NXP PN53X and I2C/SPI?

I want something close to phidget's RFID API for .NET

Thanks for reading. Tagnard

It's trivial to change in the example SW and recompile or make your own application, but it could be helpful to add this by default in future versions to the examples as well since they are quite useful for quick debugging and to make sure your HW is working OK.

Just a suggestion anyway.

Would it also be possible to check if an active connection made with nfc_initiator_select_tag is still valid? So far i can see no possibility to check if the target has been moved out of the field other than sending data to the tag.

I tried looking at the example file on http://www.libnfc.org/libnfc/examples/mftool with a hex editor but I couldn't even find where it had the UID in the format?

I'd love a bit more help in understanding the format?

Much Thanks & Respect to Roel for a great API

Thanks a lot for your efforts.

Seeing "Install rule" request (topic in this forum), I would like to provide a patch for your Makefile to be able to do this. But when I go on googlecode svn, it seems to be older than archive "libnfc-1.1.0.tar.gz".

So my question is: if I want to use/improve development version of libnfc, which one should I use ?

Thanks again.

--
Romuald

An install rule in the linux-makefile would be nice.

regards.
Philipp