RF430CL330H Android communication

Alexander Rössler

Other Parts Discussed in Thread: RF430CL330H

Hello,

We have an RF430CL330H evaluation kit and currently try to communicate with an Android device. Setting the Ndef message and reading it with the phone (Samsung Galaxy SII) works so far and the tag is correctly detected. However, we noticed following problems:

The interrupt flags (End Of Read, End of Write) are only set when the phone leaves the range of the RF430CL330H. This is a problem since this makes two way communication impossible.

When continously sending SPI commands for reading the memory during the RF field is active the NFC seems to be interfered in a way that makes it impossible to detect the tag with the phone.

Is this behavior known and is there maybe any example application for Android implementing such a direct communication. In the product presentation video of the IC it is mentioned that the chip should capable of direct communication with a reader. How was that indended to be done?

Regards

Alexander

over 11 years ago

0 Alexander Rössler over 11 years ago

Intellectual 270 points

To clarify what our goal is: We want to achieve is a Tap and Share connection as mentioned in the video: http://www.ti.com/product/rf430cl330h

0 Eddie LaCost over 11 years ago

TI__Mastermind 44625 points

Hi Alexander,

You are correct that the interrupt is not fired until the read binary or update binary command has occured and the field removed. To implement this without moving the phone away, you will need to control the RF field. When using an Android phone, I am not aware of this level of control of the RF field from an application at this time.

I will send you a friend request and we can discuss this in greater detail directly.

0 JD Crutchfield over 11 years ago in reply to Eddie LaCost

TI__Mastermind 29105 points

In the latest Android ("Kit Kat") you do have some control of the NFC RF field and can generate a RF Reset. This will allow for 2 way communication via a custom Android app, without having to remove the phone.

Thanks.

0 rchristoffer over 10 years ago in reply to Eddie LaCost

Prodigy 10 points

Hi, I would also like to know more about how, if possible, to interrupt at the start of a read. Or workarounds that achieves an interrupt before moving the phone away from the DNFC tag.

Sincerely,
Christoffer

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RF430CL330H Android communication