I really much appreciate the reference design published by TI under the link:
http://www.ti.com/tool/TIDM-NFC-P2P?CMP=AFC-conv_DS5Ref
I ported the code to a different processor and I am able to send and receive messages using my Android Galaxy S4 mini, Version 4.2.2. On the phone I use the "NDEF Tools for Android" App. It works as long as Target and Initiator mode are enabled (only passiv)
My idea was to use SNEP. The phone shall initiate the communication, send a get request that should be answered by the TRF7970. For this I disabled the initiator mode in the sample standalone application. The phone still vibrates when the TRF7970 is placed nearby but no data is transfered anymore.
Is there a limitation of the API that requires all the time both modes?
Is there the intention to create a library for the TRF7970A such as the simple link library for CC3xxx Wifi chip? Then proper versioning would be required.