TRF7970A EVM won't work.

Argail

Expert 2080 points

Other Parts Discussed in Thread: TRF7970A

Hi, I want to test the ISO1443A tab with the TRF7970A EVM, but this one won't work... When I click on the "Set protocol" as described in documentation, the system simply reply with "Read TIMEOUT", but that the few times the EVM is detected...

The driver for COM>USB is installed, and the COM configured on port 2, 115200 bps, 8 data bits, no parity, and 1 stop bit.

For example:

13:46:21.067 --> 01090003040AFF0000
13:46:21.073 --> 010C00030410002101090000
13:46:21.077 COM2
13:46:21.197 <-- TM

13:46:21.201 --> 0109000304F0000000
13:47:03.706 *** Read TIMEOUT ***
13:47:03.710 --> 0109000304F1FF0000
13:47:46.215 *** Read TIMEOUT

Any suggestion?

over 12 years ago

0 Flo Haase over 12 years ago

Prodigy 180 points

Hallo,

I had the same problems many times. I have just restarted the GUI tool serveal time and than it worked.

In gerneral the tool doesn't works very well and is unstable. I'm using Windows XP.

Best regards

Flo

0 Argail over 12 years ago in reply to Flo Haase

Expert 2080 points

Thank you for the update.. I found a new GUI from the forum it seems a bit more stable, but not all the time... anyway now there is other problems detecting a compliant iso14443a tag..

The evm can't properly perform a REQA with the AS3953 transceiver, the reader from AMS do that works well.

0 Flo Haase over 12 years ago in reply to Argail

Prodigy 180 points

Where did you find it? Can you give me link please?

Best regards

0 Argail over 12 years ago in reply to Flo Haase

Expert 2080 points

http://e2e.ti.com/support/low_power_rf/f/667/p/290654/1016789.aspx#1016789

I wanted to build my own application with labview, but even it works very badly...

0 Argail over 12 years ago in reply to Argail

Expert 2080 points

I can get the UID/CRC/RSSI from the REQA but no ATQA.

And from Select I only get: () not SAK.

Is there any explanation?

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TRF7970A EVM won't work.