nRF52 support ISO7816 protocol

[Jagadish.H]

Hi,

let me know if nRF52 support ISO7816 protocol for Smart Card Interface.

Regards, jagadish.H

[Tony Garland]

Hi Jiacheng,

I may have misinterpreted your earlier comment:

*I'm not sure if Nordic think it is useful for general purpose and have an official support.*

It sounded like you were saying that the 7816 library you were working on might be "useful for general purpose" and wind up finding "official support" from Nordic for all their customers. Apparently I misunderstood you.

Thanks - Tony

[Tony Garland]

Hi Jiacheng,

A couple of additional questions if you will permit me?

Are you using the UART for send/receive of the individual ISO-7816 bytes? Or are you bit-banging a GPIO pin (a software UART)?

If you are using the UART, then I'm not certain I understand why 7816 communications would be disturbed by ongoing radio operations by the BLE stack? If the 7816 interface is asynchronous and the UART can buffer data, wouldn't that provide immunity from interference by the radio (similarly to when one uses the UART for debug printing while BLE is active)?

Thanks for your patience - Tony

[Tony Garland]

Whoops - I just now saw a previous response you made that I hadn't noticed where you say, "if you are using UART of nRF52, there is no such [simultaneous use] issue, since nRF52 take care of UART and BLE." So that answers my question--no need to respond.