Hello,
I am working with TRF7970A-EVM and Nexus 7, & trying to establish peer to peer connection between them. I set the TRF7970A as passive target @424kbps. I have referred related documents from TI and posts. But, still having some difficulties with startup.
According to document, android device constantly polls for other device (or tag). But when I put my Nexus 7 near EVM, the value read in the register #0x19 is 0x40 instead of 0x93. Plus in the FIFO status register, I could read only 0x00 (if Nexus 7 sends any command, it should be some value other than 0x00). Is there anything missed by me?
If, in case, I get any request (or command) from Nexus 7, the EVM should send response back. Can it be done by writing the SENSF_RES bytes to the FIFO (e.g. using Trf797xRawWrite() function in the firmware) ? Is any time delay necessary between SENSF_REQ and SENSF_RES?
I hope to get any help or suggestions. Thank you very much.
Best regards.